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Theory of machines lab equipment from Educational Instrument is listed here for mechanical engineering laboratories: free and forced vibration apparatus, governors, cam analysis, balancing, bearings and lubrication, geared systems and rotating-frame apparatus. The listing shows 23 items, including Proell, Porter and Hartnell governors, a cam analysis machine, a whirling of shafts apparatus and a Michell pad apparatus.

Last updated: October 2026

Theory of machines lab equipment at a glance

Group	Items listed	Examples
Vibration and pendulum apparatus	11	Free vibrations test frame, Free vibrations of a cantilever, Free torsional vibrations, Free and forced vibrations, Simple and compound pendulums
Dynamics and balancing	6	Governors, Balance of reciprocating masses, Cam analysis machine, Whirling of shafts, Coriolis force apparatus
Bearings and lubrication	4	Air bearing apparatus, Journal bearing demonstration, Michell pad apparatus, Hertzian contact apparatus
Drives and gears	2	Geared systems, Acceleration and static test stand

How to choose

Vibration set-up: the free vibrations test frame has levelling feet and holds experiments such as the cantilever, beam-spring, torsional vibration and centre of percussion apparatus; damper kits add a dashpot run with water, vegetable oil or castor oil.
Governors: one base unit with a variable-speed motor drives Proell, Porter and Hartnell governors, and a sensor measures sleeve lift.
Balancing: the balance of reciprocating masses apparatus is a bench-mounting model four-cylinder engine for primary and secondary forces and moments.
Lubrication: the Michell pad apparatus has an aluminium pad over a flat belt running in an oil reservoir, with the pad tilt set by two eccentric shafts.

Frequently asked questions

What does the Theory of Machines Products listing include?

It shows 23 items in four groups: 11 vibration and pendulum apparatus, 6 dynamics and balancing apparatus, 4 bearing and lubrication apparatus, and 2 drive and gear items.

Which governors are included?

The governors apparatus runs Proell, Porter and Hartnell governors from one variable-speed base unit; arm length and rotating mass can be adjusted.

What does the whirling of shafts apparatus measure?

The whirling of shafts and critical speed apparatus studies shaft whirling at critical speeds; the tail bearing slides so the shaft length can change as it whirls.

Related ranges

For structures apparatus, see Next Generation Structures Products; for engine trainers, see Engines; and for the other engineering ranges, see Engineering Lab.

Request a quotation

For a quotation on items such as the governors or the cam analysis machine, contact Educational Instrument.

Air Bearing Apparatus

Product Code : EL-TOMP-11397

A hand-operated load control and load cell allow the user to apply and measure the load on the bearing bush.

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Governors

Product Code : EL-TOMP-11398

A sensor measures the position (lift) of each governor sleeve as it rises.

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Journal Bearing Demonstration

Product Code : EL-TOMP-11399

This floor-standing apparatus allows students to study the performance of a journal bearing during different test conditions.

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Universal Vibrations Apparatus

Product Code : EL-TOMP-11400

All experiments are large enough for demonstrations and produce accurate results, yet small enough to fi t on a classroom bench.

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Damper Kit

Product Code : EL-TOMP-11401

Works with easily found non-toxic fluids for different damping levels.

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Free Vibration of Beam Spring

Product Code : EL-TOMP-11402

This product includes a beam pivoted at one end, with the other end suspended by a coiled spring. This common system appears in machines and vehicle suspensions.

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Free Vibrations of Cantilever

Product Code : EL-TOMP-11403

A beam with the mass at the end works in a similar way to a mass spring system - the stiffness of the beam simply replaces the stiffness of the spring.

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Free Torsional Vibrations

Product Code : EL-TOMP-11404

The bottom of the rod fixes to a rotor that is free to rotate.

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Damper Kit For Mass/Spring

Product Code : EL-TOMP-11405

This simple piston disc and cylinder form a dash-pot damper that fits to the guide rods under the platform.

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Free Vibration of Mass Spring System

Product Code : EL-TOMP-11406

Students can easily make the link to simple harmonic motion - defined as the oscillatory motion where the restoring force is proportional to the displacement.

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Centre of Percussion

Product Code : EL-TOMP-11407

Students find the centre of gravity of the wooden (compound) pendulum to calculate its radius of gyration and centre of percussion.

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Simple and Compound Pendulums

Product Code : EL-TOMP-11408

Students test different pendulums to see how different factors, such as mass or pendulum length affect simple harmonic motion and the period of oscillation.

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