TOLLOK, part of the Rexnord brand group which is relatively new to the Akar Rulman ecosystem, offers a unique alternative for coupling requirements. Unlike traditional coupling systems, TOLLOK Conical Keys join shaft components without causing any wear or abrasion on the surfaces. In scenarios where high torque is applied, these keys provide 360° contact on the shaft surfaces. Also known as conical tightening, once these keys are tightened, radial expansion occurs, resulting in a very solid and durable assembly. In the resulting mechanism, the forces are countered by the contact between the conical surfaces and the inner and outer collars of the key.

Akar Rulman has successfully implemented TOLLOK brand Conical Keys in many fields such as robotics, drilling machines, packaging machines, motors, automation, and compression.