Torsion Apparatus/Barton's Apparatus (Vertical Pattern)
Product Code : SCL-MH-11947
Quick Answer: The Torsion Apparatus/Barton’s Apparatus (Vertical Pattern) is used to find the modulus of rigidity of a rod in torsion. It holds a 900 mm test rod, 5 mm in diameter, between a three-jaw chuck and a torsional drum.
Last updated: October 2026
Key Features
- Steel frame on a cast iron base with two levelling screws
- Upper three-jaw chuck and lower torsional drum axis clamp the rod
- Three sliding circular scales graduated 0–360° in single degrees
- Load applied through a pulley to two scale pans
- Supplied with three interchangeable test rods and strings
Technical Specifications
| Specification | Value |
|---|---|
| Frame | Steel frame on cast iron base, two levelling screws |
| Test rod | 900 mm long, 5 mm diameter |
| Clamping | Three-jaw chuck (upper), torsional drum axis (lower) |
| Scales | Three sliding circular scales, 0–360° in 1° divisions |
| Loading | Pulley with two scale pans |
| Accessories | Three test rods, strings, two pans |
About This Product
Weights in the scale pans apply a twisting couple to the drum, and the circular scales at different heights show the angle of twist along the rod. Plotting twist against load and against distance from the clamp gives the modulus of rigidity, and the spare rods let students compare different specimens. Educational Instrument can arrange export supply of the Torsion Apparatus/Barton's Apparatus (Vertical Pattern) to Guyana, Cameroon, Zambia, Democratic Republic of the Congo, Botswana and Solomon Islands.
Frequently Asked Questions
What size test rod does the apparatus take?
The listed specimen rod is 900 mm long and 5 mm in diameter.
How is the angle of twist read?
Three circular scales graduated 0–360° slide along the rod, so twist can be read at three points.
Related: Mechanics & Heat, Torsion Apparatus Searle's Type and Rigidity Apparatus (Searle's Pattern).
For a quotation on the Torsion Apparatus/Barton's Apparatus (Vertical Pattern), contact Educational Instrument.
