T/AT Series

Metric pitch

The number following T or AT designates toothspacing in mm for example T10 and AT10 are 10 millimeters

Made according to ISO 17396

AT series is rated for higher torque than Tseries of the same pitch distance

Trapezoidal shaped tooth

RPP, HTD, STD series

Metric pitch

Made according to ISO 1350

Rounded shaped tooth

The number following T or AT designates tooth spacing in mm for example RPP8, STD8,and HTD8 are 8 millimeters

Softer engagement from rounded teeth reduces noise and improves tooth load capacityover trapezoidal pitches