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Description: This is a 3 wire slip ring, a remarkably simple electromechanical assembly that allows for electronic signals and power to be passed through its rotating innards. Commonly, you’d find slip rings in wind turbines, radar antennae, or anything else that requires continuous 360° rotation while maintaining an electrical connection. This particular slip ring provides you with a compact body with precious metal alloy fiber brush to silver plated ring contacts inside. We like using these slip rings to specifically transfer power in our spinning projects because regardless of the wires position in its rotation the power remains consistent!

Each slip ring is capable of handling a continuous working speed of 250RPM, a current rating of (a whopping) 10A, and an operating voltage of 380VDC/AC. We aren’t kidding about how compact this little guy is, with only and outer diameter of 22mm for the body an 44mm diameter flange, you should have no issues fitting these into your next project. Additionally, the 250mm stranded wires protruding from each side of the slip ring have a thickness of 16AWG while the whole assembly has a water protection rating of IP51.

Note: We have used these Slip Rings at 15A with no issue.

Dimensions: 22mm Diameter x 33mm Length w/ 44mm Diameter Flange

Features:

  • 3 wires
  • Voltage: 380VDC/AC
  • Current Rating: 10A
  • Max Current Rating: 25A
  • Operating Speed: 250RPM
  • Compatible with data bus protocols
  • Transfers analog and digital signals

Documents:

Recommended Products

Customer Comments

  • Can anyone point me to a tutorial that shows how to connect one of these slip rings with a servo motor to spin a platter containing some electronics? I’m not seeing how to connect the servo to the slip ring and how to firmly connect a spinning platter to the stub of the slip ring? Thanks!!

  • What sort of noise can be expected as the device rotates - could you run an i2c connection over this and expect clean communication?

    • The 6-wire and 12-wire units say they are good for use with digital protocols like Ethernet, CAN, etc.

  • Love the 15A rating, but would like to have two data lines…for RS-485 or other two-wire busses. Some slip rings are made with mixed gauge wires, ie. two 2A lines for data, and two 15A lines for power. Pretty please?!

    • I hear your pain, but also have a suggestion for your consideration: Use the slip rings to get power across the joint, and use some form of “wireless” for data. Although I haven’t tried it across a slip-ring, I have played with WRL-12031 units for short-range communications. (There are many other wireless options, though most of the others are more expensive.)

      • I appreciate that, but would rather group it all together and reduce the overall cost…that’s the beauty of slip rings to transmit power and communications through a joint.

        • The 6-wire and 12-wire units are rated for 2A per ring, so you could send power over multiple wire pairs. Also, the 6-wire and 12-wire units say they are good for use with digital protocols like Ethernet, CAN, etc.

Customer Reviews

4 out of 5

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Nice way to de-couple power on a droid

Smooth and heavy gage wire. Easy to mount and effectively decouples power to a rotating member on a droid. Fast delivery from Sparkfun too.

Support Tips

**Slip Ring in continuous rotation camera**

For whose who have seen the video, and want to recreate Nick’s camera rig, or something like it, here is the parts list, and how they’re attached. The full rig

ROB-12433 screws onto the camera mount with a bolt and washer

2x ROB-13139 ½" standoff for USB BOB

ROB-12505 holds camera and USB BOB

2x ROB-13139½" standoff under plate, all attached to 

ROB-12209, the pulley, on

ROB-12414 clamped onto a 2" long, 1" diameter tube going through

ROB-12282, the bearing block.

ROB-13064, the slip ring fits inside the tube, with the narrow end going into

ROB-12214, which attaches to

ROB-12122, the base

ROB-12282, the bearing block mentioned before, attaches to

ROB-12287 with washers, then to

4xROB-12247 standoffs, on

ROB-12122, the base

ROB-12209, the large pulley from before connects with 

ROB-12116, the smooth belt, to

ROB-12523, the hub mount pulley, which mounts on ROB-12347, the servo kit, which mounts on  ROB-09347, the servo. 4x ROB-12286, standoffs attach the servo kit to ROB-12122, the base

All held together with machine screws in two lengths as needed, ROB-12525 ROB-12485

Reference Photos

Camera Mount Close-up

Pulley Mount Close-up 1

Pulley Mount Close-up 2

Underside of Pulley Mount

Stepper Pulley Close-up

Top view

Base of Rig