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The Orbex Group is a leading manufacturer of slip rings and precision electric motors.

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Hollow Shaft/Through Bore Slip Rings

Orbex 500 Series through bore slip rings are ideal for applications where signals and power need to be transferred, and a through hole is required to pass either a shaft or other feed through. Designed for compact spaces, they are especially well-suited for use as wind generator slip rings.

Our hollow shaft slip rings use a modular design that allows for unprecedented flexibility with respect to package size, circuit count, and the mix of power and signal circuits. Standard units can be supplied with bore diameters from 2mm to 100mm. Larger diameter through bore slip rings are available as custom solutions.

500 Series hollow shaft slip rings use Orbex’s advanced channeled brush technology to greatly increase service life.

Through Bore Slip Ring Product Details


Body Diameter

Bore Diameter

Signal Count


17 mm

3 mm

2-8 circuits


22 mm

4.5 mm

2-8 circuits


54 mm

12.7 mm

2-24 circuits


78 mm

25.4 mm

2-48 circuits


99 mm

38.1 mm

2-48 circuits


120 mm

50 mm

2-72 circuits


135 mm

60 mm

2-96 circuits


155 mm

70 mm

2-96 circuits


180 mm

80 mm

2-96 circuits


190 mm

90 mm

2-96 circuits


203 mm 100 mm 2-96 circuits 

Typical applications for the through bore slip ring include:

  • Wind generator slip rings
  • Rotary tables
  • Packaging machinery
  • Bottling machinery
  • Cable reel through bore slip rings
  • Machinery turrets
  • Medical equipment
  • Down hole inspection equipment
  • Pan and tilt heads

Contact Orbex today for the hollow shaft through bore electric slip rings your application needs. Or, download our 500 Series data sheet.

Product Name   
500 Series Hollow Shaft Slip Rings
( 285 products )
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