Model 305
Brushless Slip Ring
One Conductor,
4 Amp
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.
Model 305 Specifications
| Model Number | No. of Conductors | Body Material | Bearing Type | Max. Rotational Torque (gf-cm) |
Max. Voltage Rating (AC/DC) |
Max. Current Rating (Amps) |
Max. Rotational Speed (RPM) |
Operating Temperature °F (°C) max./ °F (°C) min. |
Max. Frequency (MHz) | Contact Resistance (mΩ) |
Circuit Separation (MΩ) |
| 305 | 3 | Anodized Aluminum | Stainless Steel | 100 | 250 | 4 | 1800 | Min 45 (7) Max 140 (60) |
200 | <1 | >25 |
| 305-L | 1000 | Min -20 (-29) Max 140 (60) |
- “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
Model 305 Accessories
593
Three Contact Receptacle
553
Three Contact Cap
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.
Model 305 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 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..
Model 305 Suggested Mounting Methods
Model 305 is typically mounted by the knurled metal receptacle, which is press-fit into the rotating member of the machine. When used horizontally, mount the Mercotac so the body of the connector rotates.
Bottom Mount with Conductive Shaft
Preferred mounting orientation.
Top Mount with Conductive Shaft
Use for top rotation.
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
Use if electrical and thermal insulation is needed.
Protective Housing Mount with Conductive Shaft
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.