Tensilbits for Cutting Kevlar

Cutting Kevlar and similar non-woven fabrics into tensile test bars is tricky.  Conventional cutting methods yield irregular edges and/or fraying at the edge.

To cut a tensile test specimen from Kevlar using the Tensilkut machine, start with the 40-75 Tensilbit.  Following the standard procedure for using the Tensilkut, make progressive passes along each side until the specimen is .005″ oversized.

40-75 Tensilbit

40-75 Tensilbit

Switch to the 40-76 Tensilbit, and finish the specimen.  The diamond coating on the 40-76 will smooth the finish and remove the frayed edges, ensuring an excellent tensile specimen from Kevlar.

40-76 Tensilbit

40-76 Tensilbit

Tensilkut also manufactures the “Bow Tie Tensile Specimen” Master template.  This specification was developed specifically for testing Kevlar.

The 40-75 Tensilbit is our solid carbide, burr type Tensilbit, which has long been used in preparation of glass laminates, composites and fiberglass specimens.  The burr ensures that the fibers in Kevlar, fiberglass and other composites will be evenly cut, resulting in non-deformed edges and a good surface finish.

40-75 Tensilbit end view

40-75 Tensilbit

The 40-76 Tensilbit is a .500″ diameter tool steel shank with a diamond coating which removes material with a sanding action.  It is an excellent choice for materials which have a tendency to crack when cut, such as certain ceramics, or for finishing edges on composite or glass filled materials.

40-76 Diamond Plated Tensilbit

40-76 Tensilbit

Bothe the 40-75 Tensilbit and 40-76 Tensilbit are designed for use with the 10-20 through 10-70 series Tensilkut I, and all Tensilkut II models.  Visit our website at www.tensilkut.com for more information on preparing test specimens on the Tensilkut machine.

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