Skip to content
S4 end-of-shaft slip ring

S-Series end-of-shaft slip ring 4 to 10 circuits

Four-circuit end-of-shaft slip ring for low-level signals: strain gages, thermocouples, RTDs, accelerometers and low voltages.

Circuits
Rotor diameter
Version
Embedded amplifier

Model S4

4
Circuits
12 000 rpm
Max speed
41.28 mm
Rotor diameter
30 mm · 111 g
Length · weight
  • Operating temperature−40 to 121 °C
  • Max current per circuit500 mA
  • Length30 mm

S4: four-circuit end-of-shaft slip ring

The S4 is an end-of-shaft slip ring with four circuits rated at 500 mA. It mounts on the free end of a rotating shaft and carries strain gages, thermocouples, RTDs, accelerometers and low voltages from rotor to stator. Precious metal rings and brushes limit the contact resistance variation to 0.1 Ω peak. The stainless steel case is sealed against dust, the bearings are lubricated for life, and color-coded solder terminals sit on both rotor and stator. With a 41.28 mm rotor, it is 30 mm long and weighs 111 g; it runs up to 12 000 rpm, from −40 to 121 °C, and a low-temperature lubricant is available below −18 °C. It is the shortest model of the series.

The rotor flange is mounted concentric and perpendicular to the shaft, on a machined shaft end or a rotor adapter, within 0.025 mm (0.001 in) of axial and radial runout. The stator is held by a flexible restraint, the S-Series restraint kit (up to 112 °C) or a worm gear clamp with a spring, never by its wires. Stranded wires, 28 or 30 AWG (24 AWG at most), run along or through the shaft and are secured to it before being soldered to the rotor terminals.

The S-Series is used, for example, to measure the torque of a gaged accessory belt pulley on an engine, or of gaged gears and gearboxes.

S4 end-of-shaft slip ring

Specifications

S4
Circuits4
Rotation sensorNone
Embedded amplifierNone
Current per circuit500 mA
MountingEnd of shaft
Max speed12 000 rpm
Rotor diameter41.28 mm
Dimensionslength 30 mm
Weight111 g
Operating temperature−40 to 121 °C
ConnectionsSolder terminals (rotor and stator: solder terminals)
Shown: S4. Download the files

Request a quote

Configuration

Color-coded terminals on the stator.

Accessories
Your request

More circuits, an encoder or a through bore: see the whole slip ring range.

Resources

A question on this product?

Shaft end, speed, circuits, signals. An application engineer answers.

More details to give? Use the full contact form.

Contact us

An application engineer replies within 24 hours on working days. Use the full contact form.