HRE / HOLLOW SHAFT FEEDBACK SYSTEMS
Hollow shaft encoders.
Keep the centre open.
Hollow shaft rotary encoders, through-bore feedback and shaftless ring kits — selected around your motor shaft, mounting envelope and controller.
Original mounting illustration · configuration confirmed by drawing
01 / CHOOSE THE MECHANICAL INTERFACE
One shaft. Three ways to read it.
Through-hollow
A continuous bore lets the shaft pass through the encoder. Check clamp access and shaft clearance.
Blind hollow bore
A closed bore fits the shaft end. Check insertion depth and avoid bottoming out the shaft.
Shaftless ring kit
A ring and readhead use the machine bearing. Check sensing gap, runout and calibration.
Original engineering concepts. Not to scale; final housing, ring and mounting dimensions require an approved drawing.
02 / ENCODERS BY STYLE
From motor shafts
to open-centre robotic joints.
Choose the mechanical format first.
Then define the position signal.
DIRECT MOTOR FEEDBACK
Hollow Shaft Rotary Encoders ↗
Through-bore and blind-bore incremental feedback for motor shafts, packaging lines and rotary axes.
- BORE
- Ø6–15 mm / ¼″–⅝″ requests
- OUTPUT
- 100–10,000 PPR · HTL / TTL
POSITION AT POWER-UP
Absolute Hollow Shaft Encoders ↗
Singleturn and multiturn hollow rotary feedback, configured around the actual controller interface.
- BORE
- Metric or inch · drawing review
- OUTPUT
- SSI / BiSS-C / RS485 / CANopen
LARGE SHAFTS. CLEAR INTERFACES.
Large-Bore Through-Shaft Encoders ↗
Heavy-duty hollow shaft encoder configuration for traction motors, rollers, wind equipment and mill drives.
- BORE
- Ø20–150 mm project envelope
- OUTPUT
- 1024 / 2048 / 4096 PPR requests
KEEP THE JOINT CENTRE OPEN
Shaftless Hollow Ring Kit Encoders ↗
Bearingless off-axis ring and readhead concepts for robotic joints and compact rotary assemblies.
- BORE
- Ø15–110 mm target ring ID
- OUTPUT
- 17–21-bit target requests · BiSS-C / SPI
ANALOGUE ANGLE FEEDBACK
Hollow Shaft Brushless Resolvers ↗
Frameless hollow rotor and stator resolver configuration for motor feedback in demanding environments.
- BORE
- Ø10–120 mm target envelope
- OUTPUT
- 1X / 2X / 4X / 8X / 16X requests
03 / REPAIR WITHOUT GUESSWORK
Replacing a SICK, Baumer,
Dynapar or Red Lion encoder?
Start with the full order code. Compare bore, tether, connector, supply and protocol before choosing an HRE configuration.
Open the replacement checklist ↗Independent comparison support. Original manufacturer references do not establish interchangeability or affiliation.ENGINEERING HANDOFF / General hollow encoder selection
Start with your shaft.
We’ll review the fit.
Send the exact bore, signal and application. Request a configuration review, quotation and matching STEP drawing in one inquiry.
[email protected] ↗Drawings and detailed specifications are confirmed for the selected configuration. Please include your original full model code for a replacement review.