Test Method: SATRA TM88

Measurement of the torsional stiffness of insole backparts

November 2022

SCOPE

This method is intended to determine the torsional stiffness of insole backparts in a way which corresponds to the twisting motion of the shoe that may occur in wear.

The method is applicable to all insole backparts, including polymer backparts, with or without a shank, and fibre board backparts reinforced with a shank.

PRINCIPLE

The insole backpart is clamped at its rear end in a moulded resin block, and a twisting moment is applied by hanging weights on the end of a transverse bar clamped to its front end. The angular rotation of the front end is measured and the torsional stiffness calculated.

REFERENCES

This Test Method does not reference any additional Standards or Test Methods.

HISTORY

First issued May 1974. Revised April 1990, August 2001, November 2022.

AVAILABILITY

This test method is available to members and non-members.

PRICE (ex. VAT)

This price is for a printed copy of the Test Method.

• Members: £75
• Non-members: £215

TYPE

• Strength

USAGES

• Insoles