Four Bar Chain Apparatus
Product Code : EL-AMLE-10624
Four Bar Chain Apparatus (code EL-AMLE-10624) is a linkage model used to show how a four-bar linkage turns uniform continuous rotation into non-uniform rotation or oscillation. A drive disk with crank and coupling and an output disk with rocker are joined by pivot joints whose positions set the crank radius, oscillation radius and coupling length, with input and output angles read on angle scales; the unit sits on a base plate with two handles.
Get a quote: use the Add To Cart enquiry button below, or send your quantity and delivery location through the contact page.
Specifications
| Parameter | Detail |
|---|---|
| Use | Converting uniform continuous rotation into non-uniform rotation or oscillation |
| Drive side | Drive disk with crank and coupling |
| Output side | Output disk with rocker |
| Joints | Elements connected by pivot joints |
| Adjustments | Pivot joint positions varied to set crank radius, oscillation radius and coupling length |
| Crank pin | Can be located at different radii on the disc |
| Input angle | Set with the drive disk; read on the disc's angular scale and on an angle scale integrated into the base plate |
| Output angle | Read on the angle scale of the output disk |
| Mounting | Elements mounted on a base plate |
| Handling | Two handles for carrying and stacking |
| Mechanisms studied | Crank-rocker, double rocker and double crank |
| Product code | EL-AMLE-10624 |
| Manufacturer | Engineering Lab Equipment, Ambala, Haryana, India |
What Is the Four Bar Chain Apparatus Used For?
Four-bar linkages are among the most common mechanisms in machinery, used wherever a turning shaft has to drive a swinging or uneven movement. The student chooses a crank radius, oscillation radius and coupling length by moving the pivot joints, turns the drive disk in steps and records the input angle against the output angle shown on the output disk. Plotting the two angles shows the motion produced, and changing the link lengths turns the same unit into a crank-rocker, a double rocker or a double crank, so the conditions that lead to each type can be compared.
What to Specify When Ordering
- Quantity — the number of four bar chain units required.
Frequently Asked Questions
Which linkage types can be set up?
By changing the crank radius, oscillation radius and coupling length, the unit can be arranged as a crank-rocker mechanism, a double rocker mechanism or a double crank.
How are the input and output angles read?
The input angle is set with the drive disk and read on an angle scale integrated into the base plate, while the output angle is read on the angle scale of the output disk.
Can the link lengths be changed?
Yes. The positions of the pivot joints can be varied, and the crank pin can be located at different radii on the disc, to alter the crank radius, oscillation radius and coupling length.
What motion does a four-bar linkage produce?
It converts a uniform continuous rotation at the input into either a non-uniform rotation or an oscillation at the output, depending on how the link lengths are chosen.
Is the unit portable?
All elements are mounted on a single base plate fitted with two handles, so the unit can be carried and stacked for storage when not in use.
OEM Manufacturer
Engineering Lab Equipment (Engineering Labs Equipment Pvt Ltd) builds the Four Bar Chain Apparatus at its works in Saha, District Ambala, Haryana (Plot No. 43, Industrial Park, Sector 2, Growth Center). Its applied mechanics apparatus for statics, friction, machines and mechanisms 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 Applied Mechanics Equipment
- Cam Mechanism — cam and follower demonstrator with interchangeable cams, angular scale and plunger or follower options.
- Slider Crank Mechanism — crank disk, connecting rod and lockable pivoting cylinder model with three crank radii.
- Slotted Link Mechanism Apparatus — anodised crank disc and straight-guide model giving 50, 75 or 100 mm harmonic strokes.
- Geneva Mechanism — slotted star wheel and driving crank model for intermittent rotary motion from a steady input.
See the full Applied Mechanics Lab Equipment range or all Mechanical Engineering Lab Equipment.
Request a Quote
For this and other applied mechanics 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 four bar chain units required and the delivery location through the contact page; the Add To Cart button on this page also adds the Four Bar Chain Apparatus to an enquiry.
Last updated: October 2026
