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Brushless Slip Ring Model 205

Conductors: Two Conductor
Amps: 4

The Mercotac® model 205 brushless slip rings are ideal for thermocouples, strain gages, eddy current test devices, and wind turbine blade sensors due to their compact size, reliable quality signal connection, low torque and low cost. The model 205 replaced the model 590, which was the pioneering brushless slip ring designed specifically for the Leslie Organ Speaker.

Advantages:

  • Durable, compact, and low cost
  • Use for signal and/or power connections
  • Easy to install and replace
  • Lightweight with robust metal construction
  • Long-lasting, energy efficient, and no maintenance
  • Made in the USA

PDF Spec Sheet CAD Download

Mercotac 205

Model 205 Product Specifications

205 Dimensions Diagram
    Details:
  • Disconnects are not included.
  • Available with stainless steel ball bearing (205-SS, 205-LS, and 205-HS) (recommended for wet or corrosive environments).

Model No. Terminals Body Material Bearing Type Max. Rotational Torque
(gf-cm)		 Max. Voltage Rating
(AC/DC)		 Max. Current Rating
(Amps)		 Max. Rotational Speed
(RPM)		 Operating Temp.
Min °F (°C)
Max °F (°C)		 Max. Frequency (MHz) Contact Resistance
(mΩ)		 Circuit Separation
(MΩ)
205 2 Anodized Aluminum Chrome Steel 75 250 4 2000 Min 45 (7)
Max 140 (60) 		200 <1 >25
205-SS Stainless Steel
205-L Chrome Steel 20 1200 Min -20 (-29)
Max 140 (60)
205-LS Stainless Steel 75
205-H Chrome Steel 35 3600 Min 45 (7)
Max 140 (60)
205-HS Stainless Steel
  • "SS" designator indicates stainless steel ball bearing (recommended for wet of corrosive environments)
  • "L" designator indicates low torque/low temp.
  • "LS" designator indicates low temp. & stainless steel ball bearing
  • "H" designator indicates high RPM
  • "HS" designator indicates high RPM & stainless steel ball bearing

Connector options are noted below. They are not included with a 205 Mercotac purchase. Order the desired connector(s) separately.

Description: Two Contact Receptacle
Item #: 591

  • With one pre-attached 6” wire (18 AWG), center contact
  • Customer may solder their own wire in the outer contact hole (18 AWG recommended)
  • Suitable up to 4 Amps
Two Contact Receptacle

Description:Two Contact Receptacle
Item #: 592

  • With two pre-attached 6” wires (18 AWG)
  • Suitable up to 4 Amps
Two Contact Receptacle

Description: Two Contact Receptacle with Solder Holes
Item #: 594

  • Two solder holes for 18 AWG wires
  • Suitable up to 4 Amps
Two Contact Receptacle with Solder Holes

Description: Two Contact Cap
Item #: 595

  • With two solder lugs for 18 AWG wires
  • Suitable up to 4 Amps
Mercotac Bootkit 1

A receptacle is used for mounting to the rotating device. The accessories are required for wire connections, since the Mercotac units cannot be soldered to directly. Order Separately.

Mercotac Bootkit 2

Model 205 is typically mounted by either the black body or the contact. Body mount typically uses a set screw or split clamp. Contact mount is held in the installed receptacle by a spring fit. It is best to mount the Mercotac so the body of the connector rotates. When used horizontally, mount the Mercotac so the body of the connector rotates.

Receptacle Mount

Receptable Mount

Bottom Mount with Conductive Shaft

Bottom Mount with Conductive Shaft

Preferred mounting orientation.

Top Mount with Conductive Shaft

Top Mount with Conductive Shaft

Use for top rotation.

Horizontal Mount with Electrically Insulated Shaft

Horizontal Mount with Electrically Insulated Shaft

The Mercotac body is electrically hot. An electrically insulated shaft can isolate it, if needed.

Thermal & Electrically Insulated Horizontal Mount

Thermal & Electrically Insulated Horizontal Mount

Use if electrical and thermal insulation is needed.

Protective Housing Mount with Conductive Shaft

Protective Housing Mount with Conductive Shaft

Vibration Isolating Mount

Vibration Isolating Mount

Installation Notes:

  • The up arrow should not point below horizontal.
  • Do not solder to or bend terminals.
  • Avoid lateral forces and mechanical loads (overly stiff or tight wires).
  • Do not rigid mount both ends of the Mercotac.
  • Limit the mounting eccentricity (runout / wobble) to .005" (.13mm).
  • Provide overload protection within the circuit.
  • Avoid vibration and bumping motions.

Model 205 Standard Wire Connections

Model 205 Standard Wire Connections

The plastic cap with solder lugs attach to stationary wires

The metal receptacle press fits into rotating member of machine.

Model 205 Standard Wire Connections

Model 205 plugs into the receptacle after the receptacle is press fit into the rotating member of the machine.

The cap plugs onto the stationary end of the 205 for the attachment of stationary wires.

104

The Mercotac model 205 brushless slip rings meet the requirements of various applications such as thermocouples, strain gages, eddy current test devices, and wind turbine blade sensors. With their compact size, reliable signal connection, low torque, and affordable cost, they are an excellent choice for these applications. It offers enhanced performance and functionality. Notably, the model 205 improves upon its predecessor, the model 590, originally designed for the Leslie Organ Speaker to make the connection between the electric organ and the rotating speaker. After a multitude of attempts it was the only slip ring able to make this high-fidelity connection.

In the sewer inspection application, as shown in the picture to the left, the Model 205 can be used on the cable reel to power the lights or to transfer the video signals to the cable as it is unrolled from the reel. As well as other video inspection applications, they are also used for tea bag machines and non-destructive eddy current crack detection of aircraft fuselage.

These slip rings also find relevance in instrumentation, test and measurement equipment, and robotics. They provide stable signal transmission in instrumentation systems, ensure accurate signal transmission in test and measurement equipment, and enable smooth robotic movements. The Mercotac model 205 brushless slip rings are a reliable and cost-effective solution for a range of applications, maintaining efficient and reliable electrical connections in diverse industries.

Check out our Applications page for more examples of how Mercotac products are utilized.

Learning Center

Guidance for using Mercotac® Brushless Slip Rings in engineering designs.

Learning Center Construction & Materials

Learn about our Mercotac® Construction & Materials: Body Materials, Bearing Types, Conductors/Terminals, Thread Sizes, Mounting Options.
Learn More

Learning Center Electrical Characteristics

Learn about Mercotac® Electrical Characteristics: Voltage Rating, Current Rating, Contact Resistance, Circuit Separation, Operating Temperature, Frequency.
Learn More

Learning Center Rotational Characteristics

Learn about Mercotac® Rotational Characteristics: Rotational Speed, Rotational Torque.
Learn More