Model 335
Brushless Slip Ring
Three Conductor
Amps: 3@30
Volts: 1500
The Mercotac® model 335 brushless slip rings are a great match for higher power applications such as electrical heating systems where electrical power is needed to transmit from a stationary power source to the rotating heating parts such as coils that are mounted to a shaft.
Model 335 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) |
| 335 | 3 | Anodized Aluminum | Chrome Steel | 700 | 500 | 30 | 500 | Min -20 (-29) Max 140 (60) |
100 | <1 | >50 |
| 335-SS | Stainless Steel |
- “SS” designator indicates stainless steel ball bearing (recommended for wet or corrosive environments)
Model 335 Accessories
57335
Boot Kit Shown Assembled
57335
Boot Kit Parts
55251
Large Flag Disconnect, Insulated
55250
Large Straight Disconnect, Insulated
Other Disconnects
Disconnects for other wire gauges are available and can be substituted for the standard disconnects(22-18 AWG and 12-10 AWG). See Ampacity Table
Model 335 Connections
Model 335 Standard Wire Connections
- Wire connections, mounted inside rotating shaft.
- Stationary end showing standard wire connections.
- Wires crimp to terminals. (Suggested tool: Thomas & Betts #WT 112M)
Model 335 Wire Connections with Optional Boot Kit
Wire connections, mounted inside rotating shaft.
Stationary end showing optional boot kit.
Cutaway view.
Wire connections, mounted inside rotating shaft.
Stationary end showing optional boot kit.
Model 335 Suggested Mounting Methods
Model 335 is typically mounted by either the black body or the white plastic bushing on either end using a set screw or split clamp. When used horizontally, mount the Mercotac so the body of the connector rotates
Body Mount
Brushing Mount
Horizonal Mount to Body
Good mounting method (but vertical orientation is better)
Adaptor Mount to Body
Use when the shaft diameter is smaller than the body of the Mercotac
Horizonal Mount to Bushing
Used if the shaft cannot be fitted to the body diameter.
Thermal Insulated Mount to Bushing
May be needed if thermal insulation is necessary. Used if the shaft cannot be fitted to the body diameter.
Top Mount to Body
Best mounting method.
Bottom Mount to Bushing
Floating Torque Arm Mount to Body
Protective Housing Mount to Body
Recommended for wash-down or dirty environments. Also recommended for food processing .
Vibration Isolation Mount to Body
With flexible bellows.
Vibration Isolating Mount to Body
With floating drive coupling.
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.