moflon slip rings
MC857 Slip Rings

OD 25.00mm(0.97"),Length 85.7mm(3.37"),56 wires * 2A(signal)

MC857 slip rings are small and compact with OD 25mm * L 85.7mm, with capsule style, standard, off-the-shelf.Color-coded lead wires are used on both the stator and rotor for simplified electrical connections. Using a 90° V-groove ring design for each ring.

MC8579 is the high-end version corresponding to MC857, It has higher performace and longer working life, higher speed rotating speed,low noise, Pealse refer to table 2 as below.

part # OD * L signal/2A 4A 8A 15A Total wires download
MC857 25mm*85.7mm 56 0 0 0 56 PDF CAD
Shared Specifications
Wires56(see table as above)CurrentSignal(2A)
Voltage240 VDC/VACMax speed100RPM
Overall diameter25mm(0.98")Length85.7mm(3.37")
Contact MaterialPrecious Metal:gold-goldContact Resistance<150mOhm(AWG28#,250mm)
Housing MaterialPlasticsTorque0.15N.m
Working lifedepends on working speedElectrical noise<10mΩ
Dielectric strength600VDC@50HzLead WireUL Teflon® Awg28
Insulation resistance1000MΩ@500VDCLead Lengths250mm
Operating Temp.-40°C to 80°CProtectionIP51
Mechanical vibratioMIL-SID-810EHumidity10% to 90% RH
MaterialsLead Free,RoHS compliantCE CertifiedYES

1)The operational life of the unit is dependent upon rotational speed, environment and temperature.
2)Lead Wire size: 2A/signal -> AWG28, 4A -> AWG22, 8A -> Awg16, 15A -> Awg14, colored code.
3)Electrical noise is dependent upon the rotating speed and current,voltage.


Max SpeedWorking lifeTorque Housing
Electrical noise①
MC857100RPMdepends on working speed0.15 N·mPlastics10mΩ
MC8579300RPM1depends on working speed0.05 N·mMetal4mΩ