Bare Wire Torsion Testing Machine

The Bare Wire Torsion Testing Machine is designed to determine the ability of metal wires with a diameter (or characteristic dimension) of 1–10 mm to withstand plastic deformation during unidirectional or bidirectional torsion. It can also reveal surface and internal defects in the test specimen.

Main Functions

1. Unidirectional Torsion Test

The specimen is uniformly rotated around its own axis in one direction until the specified number of turns is reached or the specimen fractures.

2. Bidirectional Torsion Test

The specimen is uniformly rotated around its own axis in one direction for a specified number of turns, then rotated in the opposite direction for the same number of turns or until fracture occurs.

The machine can be used to evaluate the torsional plastic deformation resistance of metal and non-metal wires and identify surface and internal defects during testing.

Applicable Standards

The Bare Wire Torsion Testing Machine is applicable to the following national and international standards:

GB/T 239.1-2012 — Metallic Materials — Wire — Part 1: Test Method for Torsion Test

GB/T 239.2-2012 — Metallic Materials — Wire — Part 2: Test Method for Reverse Torsion Test

GB/T 239-1999 — Metallic Materials — Wire — Torsion Test Method

ISO 7800:1984 — Metallic Materials — Wire — Simple Torsion Test

ISO 9649:1990 — Metallic Materials — Wire — Reverse Torsion Test

Applicable Materials

The machine can be used for various types of wire materials, including:

Steel Wires: Steel wire and other ferrous metal wires

Copper Wires: Copper wire, copper alloys, etc.

Aluminum Wires: Aluminum wire, aluminum alloys, etc.

Other Materials: Fiberglass-reinforced materials, ultra-fine fibers, alloy steel and other applicable wire materials

Technical Specifications