sales@mjdistributors.co.za

mjdistri@mweb.co.za

083 442 2986

Model 1250

Brushless Slip Ring

One Conductor,
250 Amp

Mercotac® model 1250 brushless slip rings are ideal for high current applications such as on electroplating electrodes and welding cable reels. We offer multiple 1250 model configurations as listed in the product specifications table and data sheet

Model 1250 Specifications

Model Number No. of Terminals Body material Bearing Type Bearing Enclosure Mounting Thread Size  Max. Rotational Torque
(gf-cm)		 Mounting Nut Configuration (see chart) 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)
1250 1 Anodized Aluminum Chrome Steel Seal 3/8 – 16 250 1 N/A 250 1200 Min -20 (-29)
Max 140 (60)		 200 <1




 N/A
1250-M Seal M10 x 1.5 2
1250-SC Seal 3/8 – 16 3
1250-SS Stainless Steel** (440C) Seal 3/8 – 16 1
1250-MS Seal M10 x 1.5 2
1250-LS** Shield 3/8 – 16 125 1
1250-SX Stainless Steel (303) Seal 3/8 – 16 250 1
1250-MSX Seal M10 x 1.5 250 2
1250-LSX*** Shield 3/8 – 16 125 1

The body of the 1250 series Mercotac™ unit is electrically “hot” to the internal conductor
A stainless steel Bearing Type and/or stainless steel Body Material is recommended for wet or corrosive environments
“L” designator indicates low torque (may only be operated vertically)

Mounting Nut Configurations

Model 1250 Accessories

57125

Vinyl Boot Kit for dust and splash protection
IP51 protection rating

57125

Vinyl Boot Kit for dust and splash protection
IP51 protection rating

Model 1250 Connections

Model 1250 Standard Wire Connections

Without Boot Kit

With Boot Kit

Note: The metal receptacle used for mounting is electrically conductive. Therefore, if desired, it can be used as the electrical connection between the 110 and the rotating member of the machine using Part #5920. However, if an insulated mounting at the rotating member is being used, then Part #5921-S with six inch wire lead is used for the electrical connection.

Model 1250 Suggested Mounting Methods

Top Mount with Conductive Shaft

Bottom Mount with Conductive Shaft

Horizontal Mount with Conductive Shaft

Note: Low Torque models may only be operated vertically

Top Body Mount to Bushing

Note: The housing of the 1250 series Mercotac is electrically “hot” to the internal conductor.

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.