Quick Answer: Torsion (Barton's) Apparatus Vertical Pattern twists a test rod 900 mm long and 5 mm in diameter, clamped at its upper end in a 3-jaw chuck and at its lower end in a torsional drum, on a steel frame with cast iron base.
Last updated: October 2026
Key Features
Test rod 900 mm long, 5 mm diameter
Upper end in a 3-jaw chuck, lower end in the axis of a torsional drum
Drum turned by load in a scale pan, string passing over two frictionless pulleys
Three freely sliding circular scales graduated in single degrees, clampable at any position
Three pointers for clamping to the test rod
Steel frame on a heavy cast iron base with levelling screws
Technical Specifications
Specification
Value
Test rod
900 mm long, 5 mm diameter
Upper clamp
3-jaw chuck
Lower clamp
Axis of torsional drum
Pulleys
Two, frictionless
Circular scales
Three, sliding, graduated in single degrees
Pointers
Three
Frame
Steel, on heavy cast iron base with levelling screws
Supplied with
Three test rods, strings, two scale pans; weights not included
About This Product
Load placed in the scale pan turns the torsional drum through strings running over two frictionless pulleys, twisting the vertical rod held in the 3-jaw chuck above. Three pointers clamped along the rod read against three sliding circular scales, so the twist can be followed at more than one point. Three test rods, strings and two scale pans come with this Applied Mechanics apparatus; weights are not included.
Frequently Asked Questions
Q1. How is the rod twisted? Load is put in the scale pan; the string passes over two frictionless pulleys and rotates the torsional drum clamped to the lower end of the rod.
Q2. Are weights included with the Torsion (Barton's) Apparatus? No. It comes with three test rods, strings and two scale pans, but without weights.
Beyond India, Lab Equipments Ambala ships to laboratories and education buyers in North Macedonia, Benin, the Maldives and Vietnam.
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