Scotch Yoko Mechanism
Product Code : EL-DOMLE-10777
Scotch Yoko Mechanism (code EL-DOMLE-10777) is a hand-operated teaching model of the Scotch yoke, or slotted link mechanism, used to show how the angle turned by a crank, in degrees, relates to the travel of a yoke, in millimetres. A pin on the rotating crank runs in the slot of a sliding yoke coupled to the reciprocating part, so rotary motion becomes alternating linear motion and, as the system is reversible, the other way round.
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Specifications
| Parameter | Detail |
|---|---|
| Mechanism | Scotch yoke (slotted link) reciprocating mechanism, an example of a slider-crank mechanism |
| Motion shown | Relative motion between a crank rotating in degrees and a yoke translating in millimetres |
| Working | Reciprocating part coupled directly to a sliding yoke whose slot engages a pin on the rotating part |
| Reversibility | Converts rotary to linear motion or linear to rotary motion |
| Operation | Hand operated through a crank handle |
| Layout | On base |
| Dimensions | 500 × 300 × 200 mm approx. (L × W × H) |
| Weight | 7 kg |
| Product code | EL-DOMLE-10777 |
| Manufacturer | Engineering Lab Equipment, Ambala, Haryana, India |
What Is the Scotch Yoko Mechanism Used For?
The Scotch yoke turns steady rotation into reciprocating motion without a connecting rod: the crank pin slides along the yoke's slot while pushing the yoke back and forth, which gives the yoke simple harmonic motion. Students turn the crank handle through set angles and compare each crank angle with the distance the yoke has travelled, then plot yoke displacement against crank angle. Driving the yoke instead of the crank shows that the mechanism also works in reverse, which is why it is described as reversible.
What to Specify When Ordering
- Quantity — the number of models required.
Frequently Asked Questions
What does the Scotch Yoko Mechanism demonstrate?
It demonstrates the relative motion between a crank that rotates, measured in degrees, and a yoke that translates, measured in millimetres.
How does the Scotch yoke convert motion?
The reciprocating part is directly coupled to a sliding yoke with a slot that engages a pin on the rotating part, so rotation of the crank produces the alternating linear motion of the piston.
Is the mechanism reversible?
Yes. It can convert the linear motion of the slider into rotational motion as well as rotation into linear motion, so it is a reversible system.
How is the model operated?
The model is hand operated through a crank handle and is laid out on a base, measuring approximately 500 × 300 × 200 mm and weighing 7 kg.
What is another name for the Scotch yoke?
It is also known as a slotted link mechanism, a reciprocating motion mechanism that is an example of the slider-crank type, used to convert between rotary and linear motion.
OEM Manufacturer
Engineering Lab Equipment (Engineering Labs Equipment Pvt Ltd) builds the Scotch Yoko Mechanism at its works in Saha, District Ambala, Haryana (Plot No. 43, Industrial Park, Sector 2, Growth Center). Its dynamics of machines apparatus such as governors, gyroscopes, cams and balancing machines go to engineering colleges, polytechnics, technical training institutes and research laboratories in India and abroad, and equipment can be made to an institution's own requirements. For tenders and OEM supply, see the Tenders/OEM page.
Related Dynamics of Machines Equipment
- Cam Analysis Apparatus — motor-driven cam and follower rig with four cams, two followers, springs and lift sensors.
- Rack and Pinion Gear Trainer — hand-cranked, colour-coded cutaway model of a rack and pinion mechanism on a tubular frame.
- Static and Dynamic Balancing Apparatus — ball-bearing shaft with four imbalance masses and pulley weights for static and dynamic balancing.
See the full Dynamics of Machine Lab Equipment range or all Mechanical Engineering Lab Equipment.
Request a Quote
For this and other dynamics of machine lab equipment, schools and colleges can contact Engineering Lab Equipment, a manufacturer, supplier and exporter based in Ambala, India. For a price, send the number of Scotch yoke models required and the delivery location through the contact page; the Add To Cart button on this page also adds the Scotch Yoko Mechanism to an enquiry.
Last updated: October 2026
