Hollow Shaft Rotary Encoders

Hollow-shaft and hub-shaft rotary encoders are mounted directly to a motor shaft with an elastic tether. This allows for flexibility when choosing arrangements and removes the need to size the feedback hardware to the actuator dimensions.

Hollow-shaft and hub-shafts are easier to implement and less sensitive to shock and vibration that can cause misalignment. With no external fittings are required, hollow-shaft assembly dimensions are generally smaller.


Consider a Kit Encoder:

Kit Encoders from POSITAL offer smart, maintenance-free solutions for challenging tasks in real time motion feedback. A combination of sensing technologies results in a hollow shaft design with uninterruptible, battery-free multi-turn function, powered by Wiegand pulse with every rotation.

This gear-free, compact, and economically optimized concept is ideal for integration into servo motors, stepper motors, and robotic arms. Enhanced signal processing software enables high-resolution rotary position measurement.

An absolute kit encoders: On-AxisAn absolute kit encoders: On-Axis

Absolute Kit Encoders: On-Axis 

  • Battery and gear-free multiturn solid and hub shaft
  • Singleturn Resolution up to 17 bit
  • Compact design: 36 mm in diameter (22 mm coming soon)
  • Open Source Interfaces: BiSS-C, BiSS Line, 2 or 4 wires, SSI
  • One Cable Technology for BiSS Line
  • Temperature range: -40° to +105°C
An absolute kit encoders: Hallow shaftAn absolute kit encoders: Hallow shaft

Absolute Kit Encoders: Hollow Shaft 

  • Battery and gear-free multiturn hollow shaft
  • Resolution up to 19 bit, accuracy ± 0,02
  • Slim design: 18mm thickness
  • Open Source Interfaces: BiSS-C (SSI under development)
  • No calibration required
  • Suited for applications in robotic arms and motors

Hollow-Shaft Rotary Encoder Products:

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HR12 Series by Quantum Devices

HR12 Series

1.42" Diameter Incremental Optical Encoder, Hollow Shaft, 24-20000 Pulse/Rev

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QM35 Series by Quantum Devices

QM35 Series

1.28" Diameter Bearingless Modular Design Incremental Optical Encoder, Max 8192 Pulse/Rev

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QML35 Series by Quantum Devices

QML35 Series

1.28" Diameter Bearingless Modular Design Incremental Optical Encoder, Low-Profile, Max 8192 Pulse/Rev

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QR12 Series by Quantum Devices

QR12 Series

1.22" Diameter Incremental Optical Encoder, Hollow Shaft, 24-20000 Pulse/Rev

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QR145-05/05-1000-0-01-T2-03-00 by Quantum Devices

QR145-05/05-1000-0-01-T2-03-00

Incremental Hollow Shaft Encoder, Integral Bearing, Spring Plate Mounting, 1000 Pulse/Rev, Input Voltage 5VDC, TTL to 5-26VDC Line Driver, Commutation Tracks Available

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QR145-05/05-1024-0-01-T1-03-00 by Quantum Devices

QR145-05/05-1024-0-01-T1-03-00

Incremental Hollow Shaft Encoder, Integral Bearing, Spring Plate Mounting, 1024 Pulse/Rev, Input Voltage 5VDC, TTL to 5-26VDC Line Driver, Commutation Tracks Available

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QR145-05/05-1024-0-01-T2-03-00 by Quantum Devices

QR145-05/05-1024-0-01-T2-03-00

Incremental Hollow Shaft Encoder, Integral Bearing, Spring Plate Mounting, 1024 Pulse/Rev, Input Voltage 5VDC, TTL to 5-26VDC Line Driver, Commutation Tracks Available

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QR145-05/05-1024-0-01-T3-03-00 by Quantum Devices

QR145-05/05-1024-0-01-T3-03-00

Incremental Hollow Shaft Encoder, Integral Bearing, Spring Plate Mounting, 1024 Pulse/Rev, Input Voltage 5VDC, TTL to 5-26VDC Line Driver, Commutation Tracks Available

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QR145-05/05-2048-0-01-T1-03-00 by Quantum Devices

QR145-05/05-2048-0-01-T1-03-00

Incremental Hollow Shaft Encoder, Integral Bearing, Spring Plate Mounting, 2048 Pulse/Rev, Input Voltage 5VDC, TTL to 5-26VDC Line Driver, Commutation Tracks Available

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QR145-05/05-2048-0-01-T2-03-00 by Quantum Devices

QR145-05/05-2048-0-01-T2-03-00

Incremental Hollow Shaft Encoder, Integral Bearing, Spring Plate Mounting, 2048 Pulse/Rev, Input Voltage 5VDC, TTL to 5-26VDC Line Driver, Commutation Tracks Available

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QR145-05/05-2048-0-01-T3-03-00 by Quantum Devices

QR145-05/05-2048-0-01-T3-03-00

Incremental Hollow Shaft Encoder, Integral Bearing, Spring Plate Mounting, 2048 Pulse/Rev, Input Voltage 5VDC, TTL to 5-26VDC Line Driver, Commutation Tracks Available

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QR145-05/05-500-0-01-T2-03-00 by Quantum Devices

QR145-05/05-500-0-01-T2-03-00

Incremental Hollow Shaft Encoder, Integral Bearing, Spring Plate Mounting, 500 Pulse/Rev, Input Voltage 5VDC, TTL to 5-26VDC Line Driver, Commutation Tracks Available

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QR145-05/05-5000-0-01-T1-03-00 by Quantum Devices

QR145-05/05-5000-0-01-T1-03-00

Incremental Hollow Shaft Encoder, Integral Bearing, Spring Plate Mounting, 5000 Pulse/Rev, Input Voltage 5VDC, TTL to 5-26VDC Line Driver, Commutation Tracks Available

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QR145-05/05-5000-0-01-T2-03-00 by Quantum Devices

QR145-05/05-5000-0-01-T2-03-00

Incremental Hollow Shaft Encoder, Integral Bearing, Spring Plate Mounting, 5000 Pulse/Rev, Input Voltage 5VDC, TTL to 5-26VDC Line Driver, Commutation Tracks Available

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QR145-05/05-5000-0-01-T3-03-00 by Quantum Devices

QR145-05/05-5000-0-01-T3-03-00

Incremental Hollow Shaft Encoder, Integral Bearing, Spring Plate Mounting, 5000 Pulse/Rev, Input Voltage 5VDC, TTL to 5-26VDC Line Driver, Commutation Tracks Available

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