Engineering Training Models Lab Equipment Manufacturer, Supplier and Exporter in India

What this range covers

About fifty models, coded ETM-0001 onwards, in three families. Gears: spur in single, two and three stage arrangements and with an intermediate wheel, bevel, helical, spiral, herringbone, internal gear and pinion, rack and pinion, rack and quadrant, worm, cycloidal and epicyclic including a sun and planet type, plus gear sets, gear trains, interconnected gears, reversing gears, a three-speed-and-reverse gearbox and a differential. Drives and intermittent motions: friction wheel, chain, Geneva, pawl and ratchet, and a sliding wedge with straight-line output. Linkages and mechanisms: crank and connecting rod, slider-crank with and without calibrated dials, four-bar and rocker linkages, Whitworth quick-return, crank and slotted lever, two-crank linkage, Scotch yoke, Peaucellier straight-line linkage, pantograph, ellipse tracer, kinematic pairs, inversions, and harmonic motion - followed by cams and followers, action of cams, a triangular eccentric cam and a tri-lobe cam.

A note on the names, with the correct spellings, because several records are wrong in our catalogue and the correct terms are what you are probably searching for. The straight-line linkage is a Peaucellier linkage; the copying linkage is a pantograph; the gear tooth form is cycloidal; the mechanism is a slider-crank; and one record repeats a word. The models themselves are the standard ones a kinematics syllabus names - the catalogue text is being corrected. Every name also ends with the words "engineering training model", which repeats the category rather than telling you anything, so read the names from the mechanism backwards.

Buy the Counter-Intuitive Ones First

These models exist for one reason: some motions cannot be understood from a drawing. A static diagram of a spur gear pair is perfectly clear, and a model of it adds very little. A static diagram of a Geneva mechanism or a Peaucellier linkage explains almost nothing, and a model of it is the difference between a student who has memorised a name and one who understands the motion.

So rank your syllabus list by how badly a drawing serves it, and buy from the top. For most courses the order looks like this.

That ordering saves money and produces a better teaching collection than buying one of everything, which is what a catalogue list tends to encourage.

What separates a good model from an ornament

These are handled objects: a lecturer carries them, a class passes them round, and students turn them by hand. Four things decide whether a model is still teaching in ten years.

Does it move properly? Backlash and slop are the enemy, because a loose linkage traces a sloppy path and the point of a straight-line linkage is that the path is straight. Ask about bushes or bearings at the joints rather than plain holes, and ask whether the motion can be turned smoothly through a full cycle without binding.

What is it made of? Machined metal links on a metal baseplate survive a lecture theatre; moulded plastic on a thin base does not survive being dropped. Ask the material of the links, the pins and the base, and ask whether individual parts can be replaced.

Can it be fixed down and can it be read? A model that slides across a bench while being turned teaches frustration. Ask whether the base can be clamped, and - for the models where a measurement is intended, such as the slider-crank with calibrated dials, the cam analysis models and the pantograph - whether graduations, scales or a tracing arrangement are included. A model with a dial is a tutorial exercise; the same model without one is a demonstration.

Is there anything to read? Ask whether a sheet comes with each model giving the mechanism name, its degrees of freedom, where it is used in practice and a suggested exercise. For a lecturer teaching twenty mechanisms, that sheet is half the value of the purchase, and it is the thing most often missing.

The gear models, and the question they do not answer

The gear type models show form and axis orientation well: what a helical gear looks like, why a worm drive is irreversible in practice, how a herringbone gear cancels the axial thrust that a single helix produces, why an internal gear pair rotates the same way while an external pair rotates oppositely. For a gear train or a gearbox model, ask whether the tooth counts are marked, because a gear train model without known tooth numbers cannot be used for a ratio calculation, which is the exercise a student is actually set.

What these models cannot show is why gear teeth have the shape they do - the involute, the pressure angle, interference and undercutting. Those need the generating models, which are listed in our models for theory of machines range alongside the balancing, gyroscope, governor and cam analysis rigs. The two listings are complementary: this one is the mechanism collection for teaching motion, that one is the measuring apparatus for a laboratory session.

Where these models sit in a department

Worth saying plainly, because it changes what you buy: this is lecture and tutorial equipment rather than laboratory equipment. A set of mechanism models lives in a cabinet near the lecture room, comes out for the relevant week, and is handled by everybody. That argues for durability, for clear labelling, for a storage arrangement, and for buying two of the three or four models that every class will want to turn rather than one of forty that mostly sit in a cupboard. Ask us to quote a cabinet or a set of storage trays with the models; it is the cheapest way to keep a collection intact.

For sectioned machinery and engines, see cutaways models. For the thermodynamics, structures and tribology apparatus of a mechanical laboratory, see machines. For the apparatus of a mechanics and materials laboratory, see hydraulics and fluid mechanics trainers and universal testing machines. For drawing and graphics teaching equipment, see object drawing equipments.

What to ask for on the quotation

For each model: the mechanism it demonstrates, named correctly; material of links, pins and base; bearing or bush arrangement at the joints; whether the base can be clamped; overall size and mass; whether graduations, dials or a tracing arrangement are fitted; whether tooth counts are marked on gear models; what documentation comes with it; and whether parts are individually replaceable. For a set: the full list with prices item by item rather than as a lot, so you can buy in the priority order above, and a storage or display arrangement. And for the order: packing, since these are small heavy objects that damage each other in transit, and the warranty position. For any certification stated here, contact us for the latest copies of the relevant certificates before you tender on it.

The full set is listed under engineering apparatus. For a quotation, send us your syllabus list of mechanisms and we will match it to the models and tell you where a model adds nothing a drawing does not already give you.

Frequently asked questions

Which mechanism models should a department buy first?

Start with the motions a drawing explains worst. On this listing that means the Geneva drive, Whitworth quick-return, crank and slotted lever, Peaucellier straight-line linkage, pantograph, Scotch yoke, epicyclic sun and planet, differential, and cams and followers. Next come kinematic pairs, the inversions of the four-bar chain, harmonic motion, pawl and ratchet, rack and quadrant, and internal gear and pinion. The single gear type models - spur, bevel, helical, spiral, herringbone and worm - are the ones to add only if the budget reaches, because a gear set or a diagram covers most of what they teach.

How can I tell whether a mechanism model will survive years of handling?

Ask four things. Does it move properly - bushes or bearings at the joints rather than plain holes, and a smooth full cycle without binding, because a loose straight-line linkage traces a path that is not straight. What is it made of - machined metal links on a metal baseplate survive being passed round a class, moulded plastic on a thin base does not survive a drop. Can the base be clamped, so the model does not slide across the bench while it is turned. And can individual parts be replaced. Ask for the answers to be confirmed in writing on the quotation.

Can the gear train and gearbox models be used for ratio calculations?

Only if the tooth counts are marked, so ask about that for every gear train, the three-speed-and-reverse gearbox and the multi-stage spur models. A gear train without known tooth numbers cannot be used for a ratio calculation, which is the exercise students are usually set. The gear type models are good at form and axis orientation: why a worm drive is irreversible in practice, how a herringbone gear cancels the axial thrust of a single helix, why an internal pair turns the same way. They cannot show the involute, pressure angle or undercutting - those need the generating models in our theory of machines range.

Which of these models give students something to measure?

The ones with something to read. On this listing that means the slider-crank with calibrated dials, the cam analysis models and the pantograph, where graduations, scales or a tracing arrangement turn the model into an exercise. The slider-crank is listed both with and without calibrated dials, so state which one you want. For every model, also ask whether a sheet comes with it giving the mechanism name, its degrees of freedom, where it is used in practice and a suggested exercise. For a lecturer teaching twenty mechanisms that sheet is half the value of the purchase, and it is the item most often missing.

Some model names look misspelt - which mechanism am I actually getting?

Several records in our catalogue carry wrong spellings, and that text is being corrected. The straight-line linkage is a Peaucellier linkage, the copying linkage is a pantograph, the gear tooth form is cycloidal and the mechanism is a slider-crank; one record also repeats a word. The models themselves are the standard ones a kinematics syllabus names. Every name also ends with the words engineering training model, which only repeats the category, so read each name from the mechanism backwards and use the correct term in your enquiry so there is no doubt which item you mean.

What should I send to get an accurate quotation?

Send your syllabus list of mechanisms; we will match it to the models and tell you where a model adds nothing a drawing does not already give you. Ask for the set to be quoted item by item rather than as a lot, so you can buy in priority order, and for each model ask the link, pin and base materials, the joint arrangement, whether the base can be clamped, size and mass, any graduations or tooth counts, and the documentation supplied. Ask too about packing, since these are small heavy objects that damage each other in transit, a storage cabinet or trays, and the warranty position.

Key takeaways

• Rank by how badly a drawing serves the mechanism - Geneva, quick-return, Peaucellier, Scotch yoke, epicyclic and cams come before single gear types.
• Joints decide accuracy - bushes or bearings rather than plain holes, and a full cycle without binding.
• Metal links on a metal base survive a lecture theatre; ask whether the base clamps and parts are replaceable.
• Tooth counts must be marked on gear train and gearbox models if students are to calculate ratios.
• Dials, scales or a tracing arm turn a demonstration into a tutorial - specify the calibrated slider-crank if you want readings.
• Duplicate the favourites - two of the three or four models every class turns beat one of forty that stay in the cupboard; add a cabinet to keep the set intact.

About this page

Ray Export is a manufacturer and exporter of laboratory, scientific and educational equipment based at Plot No. 449, HSIIDC Industrial Area, Saha, Ambala, Haryana 133104, India. Enquiries: [email protected], +91-9817319615.

Written by Palak Mall, Senior Content Writer. Technically reviewed by Arvind Kumar, Lab Equipment Specialist, 12+ years in laboratory and testing instrumentation. Last updated: 17 October 2026.

Specifications for each model - materials, joint arrangement, size, mass, graduations and tooth counts - are confirmed in writing on the quotation. For certificates, standards or approvals, contact us for the latest copies of the relevant certificates. No price is quoted on this page. Listing notes: several catalogue records misspell the mechanism names (Peaucellier, pantograph, cycloidal, slider-crank) and one record repeats a word; every product name ends with the words engineering training model, which repeats the category; and the page text does not list a code against each model, so quote the mechanism name as well as the code when you enquire.