Warner Electric SF-170 Bearing Mounted

  • SF Series
  • Voltage: 6/24/90 VDC
  • Static Torque: 15 lb.in.
  • Max RPM: 5,000 rpm
  • Shaft Size: .251/.250- .376/.375
  • Armature Bore: 2522/.2507- .3773/.3755

The SF design eliminates collector rings and brush-holder. Ideal for adverse environmental conditions. Mounting tolerances are generally more critical than the PC design.


Model NameSF-170 Flange Mounted
FunctionStationary Field Clutch
Static Torque15 lb.in.
Max. RPM3,600 rpm
Standard VoltageDC 6, 24, 90
Outside Diameter1.75 Inches
Overall Length1.5 Inches
Manufacturer DrawingI-25509


Custom design brakes and clutches are user-assembled from standard components for optimum performance in the smallest possible package size.

  • Easily adaptable to any mounting requirement
  • Low initial cost
  • Wide range of models and options


pdf icon 1
CatalogWarner Electric Basic Design Clutches Brakes Catalog
Users Manual / Installation InstructionsWarner Electric SF-170 BM Users Manual / Installation Instructions
Quick InformationWarner Electric SF-170 BM Duty Quick Info


(Please provide the following with your quote request)

1. Specify Type of Armature Desired.
2. Specify Bore Size for Item 1A-1 or 1B and Item 2.
3. Specify Voltage for Item 3.
4. See Controls Section.

SF-170 Clutch per I-25755 – 90 Volt Antibacklash Armature 1/4” Armature Hub Bore

Warner Electric SF Series 170 BM

Warner MB Series Controls


SF-170 Bearing Mounted Parts List
ItemDescriptionPart NumberQty.
1AArmature and Hub
1A-1Armature Hub1
1/4″ Bore5123-541-002
5/16″ Bore5123-541-003
3/8″ Bore5123-541-004
1A-3Release Spring808-00191
1BAntibacklash Armature1
1/4″ Bore5603-111-033
5/16″ Bore5603-111-034
3/8″ Bore5603-111-035
1/4″ Bore5603-751-019
5/16″ Bore5603-751-021
3/8″ Bore5603-751-020
6 Volt5603-451-039
24 Volt5603-451-041
90 Volt5603-451-043
4Retainer Ring748-00241