Spindle Technology – Series 920

Spindle Technology – Series 920

Motor spindles

Main features series 920

  • Round spindle housing design
  • Mounting flange
  • Manual clamping system

Modern machining operations require capable and dynamic spindle drives.
Our 920 series is a spindle concept that our technicians and engineers developed from customers’ applications in line with market demands. Building on many special versions, the spindle structure has been revised and standardised in order to achieve reasonable price structures. The latest techniques in the areas of bearings, motor and clamping technology, lubrication, sealing, sensor technology and materials were used in the 920 series, enabled through innovative product development and practical engineering.

The technology of the 920 series


HSK chucks are available for the smaller sizes.
The larger versions are equipped with short taper according to DIN 55027.
Larger sizes are optionally equipped with HSK chucks on request. Manual tool clamping and releasing.
The spindle is equipped with an integral rotary encoder.


We only fit high precision preloaded bearings. These have excellent attenuation properties and wearing characteristics. Concentricity, measured at the chuck, is < 0.002 mm.
The spindles run as smoothly as they do thanks to their rigid construction and optimised balancing.

Rotational direction

Spindles can be operated clockwise or CCW.


Lifetime grease lubrication


It is driven by a liquid-cooled, variable induction motor. Power ratings from 14.5–120 kW are available. A frequency converter is used to operate the spindle up to its maximum speed.
The system is controlled by an integral rotary encoder. The temperature is monitored by sensors in the motor winding.


The motor is cooled by a separate integral cooling circuit near the motor windings.


The spindle is sealed with a proven labyrinth packing and active sealing air. This protects the spindle bearings against soiling. Spindles can be installed either horizontally or vertically.

Function diagram

Reihe 920 Funktionsschema

Technical Data
Series 920 [PDF]

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