Ref: B4-2W, B6-2W

Slip Ring – Tubular – 4 or 6 circuits – 50.8mm – 7000rpm – Weatherproof

  • Tubular weatherproof slip ring
  • Circuit number: 4 or 6
  • Mounts on shafts up to 2″ [50.8 mm] in diameter
  • Wheatherproof
  • Operating Temperature Range: -40°C to 121°C
  • Permanently lubricated bearings
  • Maximum Rotation speed: 7000 RPM
  • Maximum Peak Noise: 0.1 Ohm
  • Width : 32.51 mm
  • Maximum input: 1A
  • Rugged stainless steal construction
  • Instrumentation quality rings and brushes

Download the product sheet



Michigan Scientific’s B4-2W and B6-2W Weatherproof Slip Ring Assembly are ideal for applications that require the slip ring to be sealed and mounted directly on a rotating shaft. Typically used for automotive drive shaft measurement applications, this model employs specially designed seals that provide weatherproof protection from water, mud, snow, dust, and other contaminants for indoor as well as outdoor use. It is designed to fit on shafts up to 50,8mm in diameter and make an electrical connection to strain gages, thermocouples, or other sensors that have been installed on a rotating shaft in rotary equipment. The slip ring brushes and rings are made of precious metals which minimize noise and enable the assemblies to be used for low level instrumentation signals.

The four B4-2W and six circuit B6-2W capacity allows for more than one full bridge strain gage measurement channel. This is useful for drive shaft applications where both torque and axial measurements are needed. Both B4-2W and B6-2W also provides enough circuit connections for use with spinning amplifiers. Locating precision amplifiers on the rotating side of the slip ring greatly improves signal quality because the amplifier is located closer to the sensor. This reduces errors due to long lead wires, connector resistance variations, electro-magnetic interference, and temperature gradients across slip ring contacts.


B4-2W and B6-2W can easily be mounted by putting the diameter shaft inside the rotor. In this version, the 50.8mm diameter can be adapted to smaller axial measurements. The slip ring assembly is secured to the shaft with six 8-32 set screws. Connections are made through color coded solder terminals located on the slip ring rotor and a connector on the slip ring stator. Redundant terminals are included to provide back-up connections. The compact width design of these slip rings makes them ideal for applications where limited space is available.

Collecting the stator's measurement signal is easily done by using the provided Bendix connector. A 5m cable is included. No additional setup is required. The slip ring can be mounted and used in any application. Another great feature is the limited space it takes: 32mm.

Available models

Model Circuits Rotor Diam [mm] Stator diam [mm] Length Weight Rotor connection Stator connection Comment
B4-2W 4 50.8 105,7 32,5 Soldering terminals Connector
B6-2W 6 50.8 105,7 32,5 Soldering terminals Connector
B6-2W/AMP-SG2 6 50.8 105,7 32,5 Soldering terminals Connector 2-channel SG amplifier


  • Torque measurements transmission
  • Rear axle measurements
  • Vibration measurements
  • Acceleration measurements
  • Brake measurements
  • Gearbox rendering measurements
Thru the bore
4, 6
Max rotation speed
7000 rpm
Courant maximal par voie
1000 mA
Rotor Diameter
50.8 mm
Diamètre stator
105.7 mm
0.79 mm
Température de fonctionnement
-40 to 121 °C
Contacts rotor
Picots à souder
Contact Stator
Connecteur standard
  • Rotor diameter: 50.8 mm
  • Stator diameter: 105.7 mm
  • Length: 32.11 mm

Options and accessories

  • Amplifier to connect between the sensor and the slip ring allowing the optimization of the signal's quality
  • Encoder version for information transmission
  • Custom wiring (cable lengh, connectors)
  • Mounting collar
  • Signal conditioning

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