Compound Screw Jack Manufacturer,Supplier and Exporter in India
Product Code : EL-MOL-11959
Quick Answer: The Compound Screw Jack has a double-start jack screw of 4 T.P.I., whose nut is fitted on a pedestal bearing and keyed to a 40-tooth worm gear operated by a worm screw. The worm spindle carries a 15 cm diameter effort wheel, and weights are not included.
Last updated: October 2026
Key Features
- Jack screw of 4 T.P.I., double start
- Nut fitted on a pedestal bearing and keyed to a worm gear of 40 teeth
- Worm gear operated by a worm screw
- Effort wheel of 15 cm diameter on the spindle of the worm screw
- Weights are not included
Technical Specifications
| Specification | Value |
|---|---|
| Jack screw | 4 T.P.I., double start |
| Worm gear | 40 teeth |
| Nut mounting | Pedestal bearing, keyed to the worm gear |
| Effort wheel | 15 cm diameter, on the worm screw spindle |
| Weights | Not included |
About This Product
A screw jack lifts a load by turning a screw, and a compound screw jack adds a worm and worm gear to increase the mechanical advantage. In machines and mechanics labs, students apply an effort at the wheel, lift a load and work out the mechanical advantage, velocity ratio and efficiency of the machine. The velocity ratio depends on the effort wheel, the number of worm gear teeth and the lead of the screw. A related machine in the range is the Screw Efficiency Apparatus.
Frequently Asked Questions
Q1. What are the gear details of the Compound Screw Jack?
The jack screw is 4 T.P.I. with double start. The nut is keyed to a worm gear of 40 teeth, operated by a worm screw.
Q2. What size is the effort wheel?
The effort wheel on the worm screw spindle is 15 cm in diameter.
Q3. Are weights included?
No. Weights are not included.
Related: Mechanical Operational Lab, Screw Efficiency Apparatus, Compound Wheel and Axle, Friction Slide, Moments Disc Apparatus.
For a quotation on the Compound Screw Jack, contact School Lab Equipment India.