Steed Webzell

NTK demonstrates pulling power with Poly-V line

Product Launches

For the groove machining of cast iron pulleys, NTK has introduced its line of Poly-V grooving inserts. The series, which is based on the company’s HW2 grade, is available with insert geometries that provide three, four, five and six grooves, respectively, to suit the dimensions of the desired pulley.

The recommended cutting speed on cast iron pulleys is in the region of 300 to 600 m/min, with a feed rate from 0.05 to 0.15 mm/tooth. To enhance strength, the line is supported with K3-C, K4-C, K5-C and K6-C designated shims that underpin and support the inserts.

Poly-V inserts include either a 0.3, 0.4 or 0.5 mm edge radius with a standard pitch offering of 3.56 mm and groove depth of 3.35 mm. These dimensions have been selected to conform to industry standard forms for pulleys, but NTK can manufacture specific geometries to suit customer requirements.