A to Z Glossary - S

SC crosstrack TM

The crosstrack™ joint is a ball plunging joint that was developed for improved NVH. This shudderless joint combines the premium performance of tripod plunging joints in terms of small plunging force with the premium performance of ball plunging joints in terms of reduced backlash.

Sideshaft

(Also known as halfshaft and driveshaft). On front-wheel drive vehicles a sideshaft transfers torque from the gearbox to the road wheels. The CV joints enable torque and speed to be applied uniformly and continuously as the road wheels accommodate bumps in the road surface by moving up and down relative to the engine. Additionally the CV joint connected to the wheel (outboard joint) also accommodates articulations that allow the wheels to steer. The inboard joint compensates for length change and angle between wheel and transmission resulting from suspension movement. On rear-wheel drive vehicles a sideshaft transfers torque from the final drive unit differential to the rear wheels. As with front-wheel drive the sideshaft accommodates suspension movement and sideshaft length change. A sideshaft consists of a constant velocity (CV) joint at either end of an interconnecting shaft. A constant velocity joint is a mechanical coupling in which the rotational speed of the output shaft is the same as that of the input shaft whatever the operating angle of the joint.

SIO Ballspline

The SIO joint for inboard use is based in the “opposed track principle“ to provide high performance in smallest packaging with optimised joint efficiency. Together with the ballspline as a plunging unit, it represents a premium solution for extreme plunge angle requirements and high installation angles, as for instance needed for SUV vehicles.

Speed Sensing Devices

A speed-sensing limitied slip device (LSD) creates a locking torque in response to speed-difference “sensed” across the wheels (or axles) independent of torque.

Stubshaft

The stubshaft is the interconnecting shaft which transfers torque from the tube to the inner race of a joint.

Super Limited Slip Differential (S-LSD, Super LSD)

A torque-sensing limited slip device where gear separation forces react through a conical friction surface (taper ring). The reaction force is amplified by the taper angle of the conical clutch and the resulting torque bias resists differentiation.

SX countertrack TM

The countertrack™ joint is a fixed joint that uses the principle of “opposed tracks“ for significant packaging reduction and efficiency improvement. It combines this with a specific track shape profile in longitudinal direction to allow angles of 50 degrees and more. This breakthrough technology sets the new benchmark for constant velocity joints on the outboard side.