Speedograph Richfield
Synonymous with quality speed products

Speedograph  Richfield Ltd, Rolleston Drive, Arnold, Nottingham  NG5 7JR United Kingdom.
Telephone: +44 (0) 115 926 4235. Fax:+44 (0) 115 920 9912
Email: Info@speedographrichfield.com

Sales - Service - Repairs

Today, many  industrial requirements demand precise torque control in a wide variety of  situations. To satisfy this demand Speedograph Richfield Ltd offer the S.F.U range of electromagnetic clutches and also an unrivaled repair /overhaul service for the entire S.F.U range.

This type of torque  transmission incorporating ferromagnetic powder has been well proven as a means of effective control. It combines the advantages of fluid coupling with the high  engagement efficiency of friction coupling.

A particular feature of the S.F.U range is that even performing severe duties, wear is negligible. The specially alloyed  ferromagnetic powder has excellent wear resisting properties greatly extending service and maintenance life as compared with normal friction type  clutches.

Features
  • Infinitely variable electrical torque control, torque is sensibly independent of slip velocities.
  • Torque is proportional to energising current, resulting in smooth operation without snatch or judder.
  • A positive drive entirely without slip or loss of efficiency, or controlled slip with precision.
  • Coupling or braking action, in either direction of rotation.
  • 180V AND 24V D.C. Standard motors.
  • No slip rings, excitation coil is stationary.
  • Particually suited to automated processes requiring remote control.
  • Negligible wear ensures consistent performance characteristics and long service life.
  • Maintenance is minimal, simple and robust design, sealed for life lubrication.
  • A full range of product options is available to satisfy most application  requirements.

The Inside Story

Magnetic Particle Clutches

The S.F.U range of magnetic particle clutches are unique because of the wide operating torque range available.
Torque to current is almost linear and can be controlled very accurately. The unique features of the magnetic particle clutches  make them ideal for tension control, load simulation, cycling / indexing, and soft starts and stops.

Features and Benefits

• Torque independent of slip speed
Torque is transmitted through magnetic particle chains which are formed by an electromagnetic field. The torque is independent of slip speed, depending only on circuit current, and is infinitely variable from 0 (disengaged) to rated torque.

• Precise engagement
S.F.U magnetic particle clutches engage to transmit torque with speed and precision.
Response of the particles to the field is virtually instantaneous,providing perfectly controlled, jerk-free engagement.

• No wearing parts
S.F.U magnetic Particle Clutches have no friction surfaces to grab or wear, and the units are not affected by changes in atmospheric or other environmental conditions.

 

Specifications

SFU100

SFU200

SFU300

SFU500

SFU700

Nominal  Torque

1.0  lb.ft

6.0  lb.ft

16.25  lb.ft

45 lb.ft

125  lb.ft

Electrical Power

24V D.C.

 180V D.C.

24V D.C.

 180V D.C.

24V D.C.

 180V D.C.

24V D.C.

 180V D.C.

24V D.C.

180V D.C.

Maximum Heat Dissipation

63 W

130 W

150 W

242 W

522  W

Maximum Operating  Speed

6000 RPM

6000 RPM

5000 RPM

4500 RPM

3000 RPM

Minimum Input  Speed

250  RPM

175  RPM

150  RPM

125  RPM

125  RPM

Weight

3 -1/2 lb

14 lb

15 lb

38 lb

89 lb

Speedograph  Richfield Ltd,
Rolleston Drive, Arnold, Nottingham  NG5 7JR
 United Kingdom.
Telephone: +44 (0) 115 926 4235. Fax: +44 (0) 115 920 9912
Email: Info@speedographrichfield.com