FAQ

Is there an overview for the minimum drive shaft length for all through hollow shaft encoders?

Article No: KA-10234

Version: 1.0

Subject to change without notice

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Please note:

The greater the installation depth or the more the drive shaft is located in the hollow shaft of the encoder, the better the performance of the encoder and the fewer electrical and mechanical problems will occur.

For this reason please always make for encoders with a through hollow shaft sure that the drive shaft is as long as possible.

As a recommendation, the drive shaft should be at least as long as the through hollow shaft of the encoder.

Encoder	Minimum Drive Shaft Length* [mm]
DFS60S Pro AFx60S Pro SFx60 DFS60 AFx60 SSI DFS21 ARS60	15
DUS60 DBS60	15 (front clamping) 54 (back clamping)
DGS80	25
ANx58	20

* With standard stator coupling

List last updated in July 2025

Keywords:
rotary encoders, hollow shaft encoders, blind hollow shaft, through hollow shaft, overview, minimum drive shaft length, minimum installation depth, maximum drive shaft length, maximum installation depth

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