Theory of Machine lab

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This equipment is designed for carrying out the experiment for balancing a rotation mass system. The apparatus consists of a stainless steel shaft fixed in a rectangular frame. A set of four blocks with a clamping arrangement is provided. For static balancing, each block is individually clamped on shaft. For dynamic balancing, a moment polygon is drawn using relative weights and angular and axial position of blocks is determined. The block are clamped on shaft is rotated by a motor to check dynamic balance of the system. The system is provided with angular scale and is suspended with chains for dynamic balancing.

EXPERIMENTATION:
To balance the masses statically and dynamically of a single rotating mass system.
To observation of effect of unbalance in a rotating mass system.

UTILITIES REQUIRED
Electricity Supply : 220 V AC, Single Phase, 0.5 kW with earth
Floor Area 0.5m x 0.5m
Digital Tachometer

TECHNICAL DETAILS
Drive Motor        :     FHP Motor, variable speed, with speed controller.
Balancing weight    :     4 Nos. of Stainless Steel with different sized eccentric mass                 for varying unbalance.
Rotating Shaft        :     Material Stainless Steel
Instruction Manual    :     An ENGLISH instruction manual will be provided along
                With the Apparatus.

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The set-up is designed to study Coriolli's Component of Acceleration of a slider crank mechanism. Here the mechanical slider system is replaced by a continuous stream of water flowing through a steady rotating pair of tubes. These tubes can be rotated at various speeds by using a swinging field motor which also acts as dynamometer. A Perspex window on top of the tank gives clear view of the process and prevents splash of the water over the side of the tank. The dynamometer continuously measures torque applied to the rotating tubes. The equipments is self contained, water re-circulating, provided with its own speed control unit and water circulating pump.

The present set-up has a facility to interface the system with computer which enables to  log  the  experimental  data  using  computer.  The educational software and data-logging package has been developed for unit. The software environment base is of

Lab view of NATIONAL INSTRUMENTS, USA. This software is compatible to interfacing unit designed by CL Engineers. This software package provides a comprehensive educational software environment within which the investigations can be performed. This software is capable to tabulate the sample readings according to the requirement of experiment under study and results obtained can be compared. The real time data acquisition can be done by interfacing the set-up with computer using software. Software allows the user to have control on data logging, printing the stored data, preparing spread sheets in Excel etc.

EXPERIMENTATION:

??? To determine Coriolli's Component of Acceleration at various speeds of rotation and water flow rates.

UTILITIES REQUIRED :
Water Supply.

Floor Drain.

Electricity supply: 220 V, Single Phase, 0.5 kW.

Area: 2 m x 2 m.

TECHNICAL DETAILS :       
       
Water Tank    :    Made of Stainless Steel
Rotating Arms    :    9mm/6mm orifice diameter, Length 300 mm.
Flow measurement    :    By Flow sensor
Force  measurement    :    By Load Cell.
Electric Motor    :    Swinging field, Variable speed.
Pump    :    FHP for water circulation.
Control Panel Comprises of:   
RPM measurement    :    RPM Indicator with Proximity sensor.

Speed Control Unit.

Standard make On/Off Switch, Mains Indicator, etc.
An ENGLISH instruction manual consisting of experimental procedures, block diagram etc. will be provided along with the Apparatus
The whole set-up is well designed and arranged on a rigid structure painted with industrial PU Paint

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The set-up is designed to study the working of different governors normally used to control the speed. It consists of a main spindle, mounted vertically on the base plate. This spindle is driven by a variable speed Motor which is also mounted vertically on the same base plate. Anyone governor assembly out of four can be mounted on spindle. Speed control unit controls the spindle speed. A graduated scale is fitted to the sleeve to measure the displacement.

Experiments

Determination of characteristic curve of a sleeve position against speed of rotation for all governors

• To study the effect of varying the mass of the center sleeve in Porter and Proell Governor
• To study the effect of varying the initial spring compression in Hartnell Governor
• To study the determination of characteristics curves of radius of rotation against controlling force (Actual & Theoretical) for all governors

Utilities Required

• Power Supply: 230 V AC, Single Phase.
• Floor Space: 1.5 x 1.5 m
• Tachometer to find out RPM

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The set up consists of heavy disc mounted on a horizontal shaft, rotated by a variable speed motor. The rotor shaft is coupled to a motor mounted on a trunion frame having bearings in a yoke frame, which is free to rotate about vertical axis. A weight pan on other side of disc balances the weight of motor. Rotor disc can be move about three axis. Torque can be applied by calculating the weight and distance of weight from the center of rotor. The gyroscopic couple can be determined.

Experiments

• Experimental justification of the equation T = 1 w. wp for calculating the gyroscopic couple by observation and measurement of results for independent vibrations in applied couple T and precession wp.
• To study the gyroscopic effect of a rotating disc
• Observation of gyroscopic effect of rotating disc

Utilities Required

• Electric supply: 230 V AC, Single Phase.
• Bench area: 1m x 1m

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The apparatus consists of a plain steel shaft excavated in a bearing and directly driven by a FHP Motor. The bearing is freely supported on the shaft and sealed at the motor end. The speed of the motor is controlled accurately by the speed control unit and it can be made run in both directions. Twelve equal-spaced pressure taping around the circumference and four along the axis are provided and are connected to manometer by PU Tubing so that the pressure head of oil in all tubes can be observed at a time. The bearing can be loaded by attaching weights to the arm supported beneath it.

Experiments

• To study the pressure profile of lubricating oil at various conditions of load and speed
• Plotting the Cartesian polar pressure curves
• To measure the frictional torque and power transmit

Utilities Required

• Electric supply : 230 V AC, Single Phase.
• Bench area : 1.5 x 1.5 x 4 m
• Tachometer to find out RPM of journal
• Oil SAE 40 about 5 Ltrs.

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DESCRIPTION:                                          
The apparatus provided comprehensive unit to perform the vibration experiments. A universal frame is provided upon which quick and easy assembly of various experiments can be done. The unit is self-contained to safely store spares. The students can easily assemble the experiments and study the theory of vibrations practically.
EXPERIMENTATION:
Following experiments can be performed with this unit:
To verify the relation simple pendulum.
To verify the relation of compound pendulum & to determine the radius of gyration.
To study radius of gyration of bi-filar suspension.
To study the undamped free vibration of spring mass system.
To study the longitudinal vibration of helical coiled spring.
To study the forced vibration of simply supported beam for different damping.
Undamped tensional vibrations of single rotor system.
Undamped torsion vibrations of double rotor system.
To study the damped torsional vibration of single rotor system and to determine the damping coefficient.
Verification of Dunker ley's Rule.
To study the forced damped vibration of spring mass system.
UTILITIES REQUIRED
Floor Space: 2.5 m x 2 m approx.
Power Supply: 230V AC, 5 Amps. With earth.
TECHNICAL DETAILS
Exciter Unit         :     With FHP DC Motor with Speed Control Facility
RPM measurement    :     Digital RPM Indicator with Proximity sensor.
Ordinary Chart recorder    :     For recording Frequency and Amplitude of Vibration.
Stop Watch        :     Electronic Stop Watch.
Instruction Manual     :     An ENGLISH instruction manual will be provided along With the                         Apparatus.

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The setup is a motorized unit consisting of a camshaft driven by a variable speed motor. The free end of the camshaft has a facility to mount the cam easily.The follower is properly guided in gunmetal bushes and the type of follower can be changed according to the cam under test. Graduated circular protractor is fitted co-axial with the shaft and dial gauge fitted on the follower shaft, is used to note the follower displacement for the angle of cam rotation. A spring is used to provide controlling force to the follower system. Weights on the follower shaft can be adjusted as per the requirement. An arrangement is provided to regulate the speed. The apparatus is very useful for testing the cam performance for jump phenomenon during operation and the effect of change of inertia forces on jump action of cam-follower during operation can be observed. Three sets of cams and followers are supplied with the apparatus. These are already hardened to reduce the wear.
With the help of combination of provided cams and followers following experiments can be conducted:
EXPERIMENTATION:
To plot the(Follower displacement Vs Angle of rotation) curves for different cam follower pairs
The follower bounce can be observed by using a stroboscope (Optional) & effect of follower weight on bounce can be studied.
To study the effect of follower weight on bounce.
To study the effect of spring compression on bounce.
Utilities Required
Floor Area  0.5 m x 1 m
Electricity Supply 220 V AC, Single Phase, 0.5 kW

Technical Detail
Cam Shaft : Material Stainless Steel
Cams : Tangent, Eccentric, Circular Arc, made of hardened alloy – steel.
Followers : Roller, Knife edge, Mushroom, made of hardened alloy – steel.
Compression Spring : Provided
Weights : 1 kg., 500gm, 200 gm & 100gm
Motor : Variable speed DC Motor with speed controller
Dial Gauge : Baker & Mercer/Standard Make
Instruction Manual : An ENGLISH instruction manual will be provided along with the Apparatus.

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The set up is designed to study the whirling of shafts. The set-up consists of a sturdy frame, bearing holders, variable speed motor etc. to drive the shaft along with speed control unit.  Different bearing can be fitted in bearing block to have different end conditions i.e. (i) both end fixed, (ii) one end free and one end fixed etc. As the test is destructive, hence the shaft can not be used again.
EXPERIMENTATION:
Display of various modes of whirl for a shaft with
Both ends directionally fixed.
One ends fixed and other free
Both ends directionally free.
Modes of vibrations can be studied and frequency can be measured in each case.
UTILITIES REQUIRED
Floor area of 2m x 0.5 m.
Electricity Supply 230 V AC, Single Phase, 0.5 kW.
Digital Tachometer
TECHNICAL DETAILS
Test Shafts
Length            :     1000 mm each.
Diameter        :     3.2, 4.8 & 6.4 mm (approx.)
Quantity        :     Two each.
Kinematic coupling bearing for fixed or free ends without restraint.
Drive motor, 5000 rpm, FHP.
Supplied with a speed control unit.
Instruction Manual    :     An ENGLISH instruction manual will be provided along
                with the Apparatus

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The set up consists of stainless steel disc mounted on a horizontal shaft, rotated by a variable speed motor. The rotor shaft is coupled to a motor mounted on a trunion frame having bearings in a yoke frame, which is free to rotate about vertical axis. A weight pan on other side of disc balances the weight of motor. Rotor disc can be move about three axis. Torque can be applied by calculating the weight and distance of weight from the centre of rotor. The gyroscopic couple can be determined.
EXPERIMENTATION
Experimental justification of the equation T = I. . p. for calculating the gyroscopic couple by observation and measurement of results for independent vibrations in applied couple T and precession p.
To study the gyroscopic effect of a rotating disc.
UTILITIES REQUIRED
Electricity Supply 230 V AC, Single Phase, 0.5 kW
Bench area 1m x 1m
Digital Tachometer
TECHNICAL DETAILS
Disc Material Stainless Steel, Dia 300 mm x 10 mm thick precisely balanced which can be rotated in 3 mutually perpendicular axis.
Motor Variable speed of standard make.
Supplied with Speed Control Unit.
Weights 2 kg, 1 kg, 500 gms.
Stop Watch Electronic
Accurately marked scale & pointer to measure precession rate.
Instruction Manual An ENGLISH instruction manual will be provided along
With the Apparatus.

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The apparatus consists of a plain steel shaft excavated in a bearing and directly driven by a FHP Motor. The bearing is freely supported on the shaft and sealed at the motor end. The speed of the motor is controlled by the speed control unit. One compound pressure gauge is mounted on bearing to measure the pressure at different position around the circumference. Bearing is free to rotate and can be adjusted at any position of circular scale. The bearing can be loaded by attaching weights to the arm supported beneath it.
EXPERIMENTATION:
To study the pressure profile of lubricating oil at various conditions of load and speed.
Plotting the Cartesian polar pressure curves.
UTILITIES REQUIRED
Electricity supply: 230 V AC, Single Phase, 0.5 kW.
Area : 1.5 x 1.5
Digital Tachometer
Oil SAE 40 about 5 Ltrs.
TECHNICAL DETAILS
Journal         :     Diameter 50 mm
Bearing         :     Diameter 55 mm
Weights        :     4 weights.
Motor             :     Variable speed FHP Motor
Control Panel        :     For speed control of motor.
Oil recommended     :     SAE 40
Pressure Gauge     :     Compound Pressure gauge (-1 to 1) Kg/cm2
Instruction Manual     :     An ENGLISH instruction manual will be provided along
                with the Apparatus.

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The apparatus consists of a plain steel shaft excavated in a bearing and directly driven by a FHP Motor. The bearing is freely supported on the shaft and sealed at the motor end. The speed of the motor is controlled by the speed control unit. One compound pressure gauge is mounted on Bearing to measure the pressure at different position around the circumference. Bearing is free to rotate and can be adjusted at any position of circular scale. The bearing can be loaded by attaching weights to the arm supported beneath it.

The present set-up has a facility to interface the system with computer which enables to log the experimental data using computer. The educational software and data-logging package has been developed for unit. The software environment base is of Labview of NATIONAL INSTRUMENTS, USA. This software is compatible to interfacing unit designed by CL. Engineers. This software package provides a comprehensive educational software

environment within which the investigations can be performed. This software is capable to tabulate the sample readings according to the requirement of experiment under study and results obtained can be compared. The real time data acquisition can be done by interfacing the set-up with computer using software. Software allows the user to have control on data logging, printing the stored data, preparing spread sheets in Excel etc.

EXPERIMENTATION:
To study the pressure profile of lubricating oil at various conditions of load and speed.

Plotting the Cartesian polar pressure curves.

UTILITIES REQUIRED :
Electricity supply: 230 V AC, Single Phase, 0.5 kW.

Area : 2m x 1m

Oil SAE 40 about 5 Ltrs.

Computer System: Pentium IV with DVD Drive, Windows 7, MS-Office pre-loaded. One USB slot required in PC for DATA ACQUISITION CARD.

TECHNICAL DETAILS :       
Journal    :    Diameter 50 mm
Bearing    :    Diameter 55 mm
Weights    :    4 weights.
Motor    :    Variable speed FHP Motor
Control Panel    :    For speed control of motor.
Oil recommended    :    SAE 40
Pressure measurement    :    Pressure transmitter
Load measurement    :    Load cell indicator
RPM Measurement    :    Digital RPM Indicator with proximity switch.
An ENGLISH instruction manual consisting of experimental procedures, block diagram etc. will be provided along with the Apparatus
The whole set-up is well designed and arranged on a rigid structure painted with industrial PU Paint.

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The set-up is designed to study the working of different governors normally used to control the speed. It consists of a main spindle, mounted vertically on the base plate. This spindle is driven by a variable speed Motor which is also mounted vertically on the same base plate. One governor assembly out of four can be mounted on spindle. The spindle speed is controlled by speed control unit. A graduated scale is fitted to the sleeve to measure the displacement.
EXPERIMENTATION:
Determination of characteristic curve of a sleeve position against speed of rotation for all governors.
To study the effect of varying the mass of the center sleeve in Porter and Proell Governor.
To study the effect of varying the initial spring compression in Hartnell Governor.
To study the determination of characterstics curves of radius of rotation against controlling force (Actual & Theoretical) for all governors.  

UTILITIES REQUIRED:
Electricity Supply: 230 V AC, Single Phase, 0.5 kW.
Floor Space : 1.5 x 1.5 m
Digital Tachometer
TECHNICAL DETAILS
Spindle             :     Material Stainless Steel
Governor Mechanism     :     Four different types of governor mechanism with                         spring and Weights.
Watt Governor
Porter Governor
Hartnell Governor
Proell Governor
Motor                 :     Variable speed, Standard Make, FHP Motor.
Control Panel            :     For speed control of motor.
Instruction Manual         :     An ENGLISH instruction manual will be provided                         along With the Apparatus

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The set-up is designed to study Coriolli's Component of Acceleration of a slider crank mechanism. Here the mechanical slider system is replaced by a continuous stream of water flowing through a steady rotating pair of tubes. These tubes can be rotated at various speeds by using a swinging field motor which also acts as dynamometer. A Perspex window on top of the tank gives clear view of the process and prevents splash of the water over the side of the tank. The dynamometer continuously measures torque applied to the rotating tubes. The equipments is self contained, water re-circulating, provided with its own speed control unit and water circulating pump.
EXPERIMENTATION:
To determine Coriolli's Component of Acceleration at various speeds of rotation and water flow rates
UTILITIES REQUIRED
Water Supply.
Drain.
Electricity supply: 220 V, Single Phase, 0.5 kW.
TECHNICAL DETAILS
Water Tank            :     Made of Stainless Steel
Rotating Arms            :     9mm/6mm orifice diameter, Length 300 mm.
Rota meter            :     250 to 2500 LPH
Electric Motor             :     Swinging field, Variable speed.
Pump                 :     FHP for water circulation.
Control Panel Comprises of     :
RPM measurement         :     RPM Indicator with Proximity sensor.
Speed Control Unit.
Standard make On/Off Switch, Mains Indicator, etc.
Instruction Manual         :     An ENGLISH instruction manual will be provided                         along with the Apparatus
The whole set-up is well designed and arranged in a good quality painted structure.

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This apparatus is useful for measurement of power transmitted for various input power conditions with varied belt tension. Belt slip or creep also can be measured. The apparatus consists of a variable speed motor, driving pulley and driven pulley of equal diameters. The pulleys are mounted on input shaft (motor shaft) and output shaft. The driven pulley can slide on the base only with bearing block to change the initial tension in belt. Brake drum is mounted on the output shaft, which helps to measure power output. The motor speed is varied by variable speed drive. A double channel digital speed indicator indicates driving and driven pulley speeds. With the help of Stroboscope (optional) it is possible to demonstrate the slip of belt on driving and driven pulley.
EXPERIMENTATION:
To measure co-efficient of friction between pulley material and different belt materials.
To measure power transmitted with varied belt tension.
To measure percentage slip at fixed belt tension by varying load on the brake drum and plot the graph of   (T1-T2) v/s percentage slip i.e. “Slip Characteristics”.
To measure belt slip speed and observe the limiting value of load at constant speed when the slip just starts.
To study creep of belt.
UTILITIES REQUIRED
Electricity supply: 220 V, Single Phase, 0.5 kW.
Space: 0.5m x 1.5m
TECHNICAL DETAILS
Motor                :     Variable speed motor, 1HP, 1500 RPM.
Pulleys                :     Driving and driven pulleys of equal diameters (flat pulleys)
Loading Arrangement        :     Brake drum along with spring balance and rope arrangement
                    is provided to load the system.
Belts                :     Flat belts of fixed length of two different belt materials
Belt tightening arrangement    :      Bearing block is sliding and dead weight can be applied to                     set the initial tension in belt.
Speed Indicator        :     2 Channel digital speed indicator with switch to change the                     channel.
Instruction Manual        :     An ENGLISH instruction manual will be provided along
                    With the Apparatus.

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Gear Train is any combination of gear wheels by which motion is transmitted from one shaft to another shaft. In epicyclical gear trains, the axes of shafts on which the gears are mounted may move relative to a fixed axis. It is a motorized unit consisting of a SUN gear mounted on input shaft. Planet gears meshes with the annular gear. These planet gears are mounted on a common arm to which output shaft is fitted. Loading arrangement is provided for loading the system and to measure holding torque

EXPERIMENTATION:
To measure epicyclical gear ratio between input shaft and output shaft
(Actual and Theoretical).
To measure input torque, holding torque and output torque.
UTILITIES REQUIRED:
Electricity Supply: 220 V AC, Single Phase, 0.5 kW.
Floor Area: 1.5 x 2 m.3
TECHNICAL DETAIL
Internal Type Epicyclical Gear Train
A Compact gear train (industrial)
Motor            :     Variable speed motor, 1 HP.
RPM Measurement    :     Digital RPM Indicator with proximity switch.
Speed Control Unit    :     Variable Speed Drive for varying the speed of motor.
Rope brake arrangement to measure output torque and holding torque.
Instruction Manual     :     An ENGLISH instruction manual will be provided along
                With the Apparatus

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We are offering Pin On Disc Wear Testing Machine.
Pin on Disc Wear Test Rig is designed to study friction and wear characteristics in sliding contacts. Sliding occurs between a stationary pin and a rotating disc. Normal load and wear track diameter can be varied. Tangential frictional force and wear are monitored with electronic sensors. This test rig is suitable for demonstration of wear and friction properties.

FEATURES :
Continuously variable wear Track
Display of wear and frictional force.
Pre-settable test duration.
UTILITIES REQUIRED :
Mercury: 250 ml.

TECHNICAL DETAILS :       
Wear Disc       
Diameter    :    100mm
Thickness    :    6mm minimum & 8mm maximum
Pin Diameter    :    6mm
Length    :    25mm
Wear Track Diameter    :    50mm minimum & 80mm maximum (Variable)
Disc Speed    :    300 RPM
Normal Load    :    5 minimum & 30 maximum (In steps of 5N)
Frictional Force    :    0 minimum & 30 maximum
Wear Range    :    0mm minimum & 2mm maximum
Preset Timer    :    1 minute minimum & 9999 maximum
Power    :    230 V, 1 Ph, 50Hz, 500VA
An ENGLISH instruction manual consisting of experimental procedures, block diagram etc. will be provided along with the Apparatus
The whole set-up is well designed and arranged on a rigid structure painted with industrial PU Paint.

Price on Request: Get Latest Price

Epicyclic Gear Train Apparatus & Holding Torque Apparatus With Data Logging Facility    

Gear Train is any combination of gear wheels by which motion is transmitted from one shaft to another shaft. In epicyclic gear trains, the axes of shafts on which the gears are mounted may move relative to a fixed axis.

It is a motorized unit consisting of a SUN gear mounted on input shaft. Planet gears meshes with the annular gear. These planet gears are mounted on a common arm to which output shaft is fitted. Loading arrangement is provided for loading the system and to measure holding torque.

The present set-up has a facility to interface the system with computer which enables to log the experimental data using computer. The educational software and data-logging package has been developed for unit. The software environment base is of Labview of NATIONAL INSTRUMENTS, USA. This software is compatible to interfacing unit designed by CL Engineers. This software package provides a comprehensive educational software environment within which the investigations can be performed. This software is capable to tabulate the sample readings according to the requirement of experiment under study and results obtained can be compared. The real time data acquisition can be done by interfacing the set-up with computer using software. Software allows the user to have control on data logging, printing the stored data, preparing spread sheets in Excel etc.

EXPERIMENTATION:
To measure epicyclic gear ratio between input shaft and output shaft (Actual and Theoretical).

To measure input torque, holding torque and output torque.

UTILITIES REQUIRED :
Electricity Supply: 220 V AC, Single Phase, 0.5 kW.

Floor Area : 2m x 1m.
Computer System : Pentium IV with DVD Drive, Windows XP, MS-Office XP version pre-loaded. One USB slot required in PC for DATA ACQUISITION CARD.

TECHNICAL DETAILS :

Internal Type Epicyclic Gear Train A Compact gear train (industrial)
Motor    :    Variable speed motor, 1 HP.
Speed Control Unit    :    Variable Speed Drive for varying the speed of motor.
Load    :    Load cell indicator
RPM Measurement    :    Digital RPM Indicator with proximity switch.
Digital Voltmeter    :    0-300 Volt.
Digital Ammeter    :    0-5 Amp.
An ENGLISH instruction manual consisting of experimental procedures, block diagram etc. will be provided along with the Apparatus
The whole set-up is well designed and arranged on a rigid structure painted with industrial PU Paint.
      

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This equipment is designed for carrying out the experiment for balancing a rotation mass system. The apparatus consists of a steel shaft fixed in a rectangular frame. A set of four blocks with a clamping arrangement is provided. For static balancing, each block is individually clamped on shaft and its relative weight is found out using cord and container system in terms of number of steel balls. For dynamic balancing, a moment polygon is drawn using relative weights and angular and axial position of blocks is determined. The block are clamped on shaft is rotated by a motor to check dynamic balance of the system. The system is provided with angular and longitudinal scales and is suspended with chains for dynamic balancing.

Experiments

• To balance the masses statically and dynamically of a single rotating mass system
• To observation of effect of unbalance in a rotating mass system

Utilities Required

• Electricity 0.5kW, 220V, Single Phase

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The set-up is designed to study Coriolli's Component of Acceleration of a slider crank mechanism. Here the mechanical slider system is replaced by a continuous stream of water flowing through a steady rotating pair of tubes. These tubes can be rotated at various speeds by using a swinging field motor which also acts as dynamometer. A Perspex window on top of the tank gives clear view of the process and prevents splashing of the water over the side of the tank. The dynamometer continuously measures torque applied to the rotating tubes. The equipments is self contained, water re-circulating, provided with its own speed control unit and separate water circulating pump.

Experiments

• To determine Coriolli's Component of Acceleration at various speeds of rotation and water flow rates

Utilities Required

• Water Supply & Drain
• Electricity 0.5 kW, 220 V, Single Phase

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The apparatus consists of a pad, which can be tilted to the required angle. An endless belt, which moves, beneath the pad, carries the oil over its surface from oil bath. When the pad is tilted over the oil film, pressure is developed, the pad is provided with pressure tapings parallel and perpendicular to belt direction. The pressure distribution is measured over a multi tube manometer. A variable speed motor drives the belt. The tilting angle and minimum gap between pad and belt can be adjusted and characteristics thus can be studied at various gaps, inclination and relative surface speeds.

Experiments

• Demonstration of pressure development
• Plotting pressure variation curve in longitudinal & transverse direction of a pad for various speeds and pad inclination
• Demonstration of cavitations phenomenon

Utilities Required

• Power Supply: 230 V AC, Single Phase.
• Floor space: 1m x 1.5 m (approx).
• SAE-40 oil for carrying the test (approx 3 Ltrs.)

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This apparatus is useful for measurement of power transmitted for various input power conditions with varied belt tension. Belt slip or creep also can be measured. The apparatus consists of a variable speed D.C. Motor, driving pulley and driven pulley of equal diameters. The pulleys are mounted on input shaft (motor shaft) and output shaft. The driven pulley can slide on the base only with bearing block to change the initial tension in belt. Brake drum is mounted on the output shaft, which helps to measure power output. The motor speed is varied by Thyristor Control D.C. Drive. A double channel digital speed indicator indicates driving and driven pulley speeds. With the help of Stroboscope (not in the scope of supply) it is possible to demonstrate the slip of belt on driving and driven pulley.

Experiments

• To measure co-efficient of friction between pulley material and different belt materials.
• To measure power transmitted with varied belt tension.
• To measure percentage slip at fixed belt tension by varying load on the Brake drum and plot the graph of (T1- T2) v/s percentage slip i.e. "Slip Characteristics" Finding a Creep Zone from graph.
• To measure belt slip speed and observe the limiting value of load at constant speed when the slip just starts
• To study creep of belt

Utilities Required

• Electricity 0.5 kW, 220 V, Single Phase
• Stroboscope

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DESCRIPTION 
The Pin and Disc wear Apparatus consists of a steel disc whose top surface is case hardened andground. The disc is rotated by a single ph. Induction motor at 3 different speeds. The test pin isinserted in a pin guide so that one end of pin touches the rotating disc. The pin guide is mounted on a cantilever to which spring balance is attached. The pin is inserted in the pin guide. The disc is set to rotate at the required speed. Load is put over the pin and wear of the pin is measured.
TECHNICAL DETAIL

• DISC - Case hardened steel disc,
• Dia. 200 mm
• Max speed 2700 rpm.
• Max. surface speed 26.5 m/s.
• Driver motor - 1 HP, 2800 rpm,
• Single ph. Induction motor with 3 speed V â belt pulley.
• Pins -Dia. 12 mm + 0.000 / -0.005 mm,
• Aluminium, brass and cast iron â“1 No. each, with pin guide.
• Lubricant tank with pipe for lubricated testing.
• Spring balance 1 kg.
• Analogue displacement measurement unit for measurement unit for measurement of wear of pin,
• range â 0-10 mm, L.C. 0.01 mm.
• A splash arrester and protective cover are provided around the disc.