Tolerance sleeves are slotted sheet metal sleeves with beads that are embossed like wave crests. The standard material used is stainless steel spring strip, which can withstand temperatures of up to 250 ° C. Special designs can even be used at temperatures of up to 450 ° C or in aggressive chemical environments. Dr. Tretter presents its tolerance sleeves or tolerance rings in one Robotic arm installed to show what they can do.

The tolerance sleeve sits in the gap between the shaft and the receiving bore of the hub. The wave crests, which are distributed over the entire circumference of the tolerance sleeve and how many small ones, ensure the tight fit compression springs Act. The wave crests are elastically deformed by a certain oversize of the tolerance sleeve. This creates a frictional connection between the shaft and the hub.

Users can also simply loosen and replace the components. This gives the tolerance sleeves a huge advantage over press and adhesive joints. And compared to other shaft-hub connections, the small components are usually easier to handle with lower total cost of ownership.

Torsionally rigid shaft coupling for measuring flange in the test bench

In drive technology, the tolerance sleeves are used in flywheels or gearwheels, among other things. In the case of pumps and motors, they enable the bearings to be attached and compensate for center misalignments or different temperature expansions of the connecting parts. They are also used to fix the stator in the housing. They can also be used to control pump wheels, belt pulleys, fan wheels and encoder Fasten.

Trapezoidal thread as an alternative to ball screw drive

A novelty at the booth are the trapezoidal screw drives. These can be used in certain applications compared to the more expensive and accurate ones Ball Screwsn be an economical alternative. A high level of strength can be achieved by rolling the trapezoidal thread spindle. If the thread flanks also have a high surface quality, the unit achieves extremely good running properties. They also require less installation space. A wide range of diameters and pitches is available. The quality supplier specializes in the end machining of the screw drive according to customer drawings for small or large quantities.

Select eyebolt, cotter pin, axial joint online

The connection of a ball screw or a trapezoidal threaded spindle to the drive pin of an engine or transmission is usually not rigid, but via a flexible coupling. This can compensate for misalignment or misalignment and minimize driveline vibration and shock. Dr. offers Tretter now flexible shaft couplings. These consist of two identical hubs with concave claws and an elastomeric ring gear in between.
 

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