Knipex 46 21 A31 SBA Retaining Ring Plier External .090 Tip 90 Deg

Knipex 46 21 A31 SBA Retaining Ring Pliers

This Knipex 46 21 A31 SBA plier is built for technicians who remove or install external retaining rings on shafts between 1-9/16 in and 4 in. The 90-degree angled .090 in tips reach into tight bores where straight tips cannot. Chrome vanadium electric steel construction resists wear during repeated professional use. The black finish adds corrosion resistance in workshop environments.

Sustained load behavior

The solid forged tips maintain their .093 in diameter accuracy after hundreds of cycles, preventing tip spread that damages ring grooves. Chrome vanadium electric steel handles high clamping forces without permanent deformation during extended service work. Plastic-dipped handles transmit torque without slipping when hands are oily or wet. The 90-degree tip angle holds its geometry under load, keeping contact faces parallel to the ring.

Installation and common issues

The pliers open and close with one hand, so the operator positions the tips, squeezes, and lifts the ring free. No separate spring or adjustment screw is required before use. The most common error is selecting the wrong tip diameter or angle for the ring groove, which rounds the lugs. Exceeding the 1-9/16 in to 4 in shaft range bends the tips. Dipped grips can tear if caught on sharp edges.