Rotating Field Disc Clutch

RFDC Series

Rotating Field Disc Clutch

  • Wet Static Torque – 12 to 795 lb-ft
  • Wet Starting Torque – 7 to 449 lb-ft
  • Dry Static Torque – 32 to 882 lb-ft
  • Dry Starting Torque – 10 to 673 lb-ft
  • Max Speed – 1750 to 4200 rpm
  • Nine standard frame sizes
  • Overall Dia. – 3.9″ to 9.2″
  • Overall Length – 1.7″ to 3.3″
  • Rotor Bore – .8″ to 2.8″
Performance / Mechanical Specifications RFDC Series — Model Size
RFDC - 395 RFDC - 435 RFDC - 475 RFDC - 520 RFDC - 580 RFDC - 640 RFDC - 720 RFDC - 795 RFDC - 925
STP File Model
Model: RFDC - 395
3D
Model: RFDC - 435
3D
Model: RFDC - 475
3D
Model: RFDC - 520
3D
Model: RFDC - 580
3D
Model: RFDC - 640
3D
Model: RFDC - 720
3D
Model: RFDC - 795
3D
Model: RFDC - 925
3D
Torque Static (Wet) lb-ft
Model: RFDC - 395
12
Model: RFDC - 435
23
Model: RFDC - 475
46
Model: RFDC - 520
75
Model: RFDC - 580
117
Model: RFDC - 640
187
Model: RFDC - 720
300
Model: RFDC - 795
505
Model: RFDC - 925
795
(Nm)
Model: RFDC - 395
(16.2)
Model: RFDC - 435
(31.2)
Model: RFDC - 475
(62.4)
Model: RFDC - 520
(101.7)
Model: RFDC - 580
(158.6)
Model: RFDC - 640
(253.5)
Model: RFDC - 720
(406.7)
Model: RFDC - 795
(684.7)
Model: RFDC - 925
(1077.9)
Torque Starting (Wet) lb-ft
Model: RFDC - 395
7
Model: RFDC - 435
12
Model: RFDC - 475
25
Model: RFDC - 520
42
Model: RFDC - 580
65
Model: RFDC - 640
107
Model: RFDC - 720
168
Model: RFDC - 795
281
Model: RFDC - 925
449
(Nm)
Model: RFDC - 395
(9.5)
Model: RFDC - 435
(16.2)
Model: RFDC - 475
(33.9)
Model: RFDC - 520
(56.9)
Model: RFDC - 580
(88.1)
Model: RFDC - 640
(145.1)
Model: RFDC - 720
(227.8)
Model: RFDC - 795
(381.0)
Model: RFDC - 925
(608.8)
Torque Static (Dry) lb-ft
Model: RFDC - 395
13
Model: RFDC - 435
25
Model: RFDC - 475
52
Model: RFDC - 520
84
Model: RFDC - 580
130
Model: RFDC - 640
208
Model: RFDC - 720
332
Model: RFDC - 795
561
Model: RFDC - 925
882
(Nm)
Model: RFDC - 395
(17.6)
Model: RFDC - 435
(33.9)
Model: RFDC - 475
(70.5)
Model: RFDC - 520
(113.9)
Model: RFDC - 580
(176.3)
Model: RFDC - 640
(282)
Model: RFDC - 720
(450.1)
Model: RFDC - 795
(760.6)
Model: RFDC - 925
(1195.8)
Torque Starting (Dry) lb-ft
Model: RFDC - 395
10
Model: RFDC - 435
19
Model: RFDC - 475
39
Model: RFDC - 520
63
Model: RFDC - 580
98
Model: RFDC - 640
161
Model: RFDC - 720
253
Model: RFDC - 795
421
Model: RFDC - 925
673
(Nm)
Model: RFDC - 395
(13.6)
Model: RFDC - 435
(25.8)
Model: RFDC - 475
(52.9)
Model: RFDC - 520
(85.4)
Model: RFDC - 580
(132.9)
Model: RFDC - 640
(218.3)
Model: RFDC - 720
(342)
Model: RFDC - 795
(570.8)
Model: RFDC - 925
(912.5)
Max Speed rpm
Model: RFDC - 395
4200
Model: RFDC - 435
4000
Model: RFDC - 475
3500
Model: RFDC - 520
3200
Model: RFDC - 580
3000
Model: RFDC - 640
2500
Model: RFDC - 720
2200
Model: RFDC - 795
2000
Model: RFDC - 925
1750
Overall Length (ref) in
Model: RFDC - 395
1.77
Model: RFDC - 435
1.88
Model: RFDC - 475
2.04
Model: RFDC - 520
2.16
Model: RFDC - 580
2.28
Model: RFDC - 640
2.44
Model: RFDC - 720
2.67
Model: RFDC - 795
2.99
Model: RFDC - 925
2.875
(mm)
Model: RFDC - 395
(44.9)
Model: RFDC - 435
(44.9)
Model: RFDC - 475
(51.08)
Model: RFDC - 520
(54.9)
Model: RFDC - 580
(54.9)
Model: RFDC - 640
(62)
Model: RFDC - 720
(67.8)
Model: RFDC - 795
(75.9)
Model: RFDC - 925
(73)
Mag Body Bore (max.) in
Model: RFDC - 395
0.875
Model: RFDC - 435
1.125
Model: RFDC - 475
1.25
Model: RFDC - 520
1.5
Model: RFDC - 580
1.687
Model: RFDC - 640
1.875
Model: RFDC - 720
2.188
Model: RFDC - 795
2.5
Model: RFDC - 925
2.875
(mm)
Model: RFDC - 395
(22.2)
Model: RFDC - 435
(28.6)
Model: RFDC - 475
(31.7)
Model: RFDC - 520
(38.1)
Model: RFDC - 580
(42.8)
Model: RFDC - 640
(47.6)
Model: RFDC - 720
(55.6)
Model: RFDC - 795
(63.5)
Model: RFDC - 925
(73)

RFDC Operation

This SEPAC rotating field multiple disc clutch is designed to operate both dry and in oil. No bearings are used. Current is supplied to the magnet body coil by an electrical brush through a slip ring. (Grounding is accomplished internally through the magnet body to the machine shaft.) Many options are available.

When current is applied to the coil in the magnet body, a magnetic field is created which attracts the armature toward the magnet body face. This causes the outer disc to be squeezed between the inner discs and the torque is transmitted from the input (magnet body) to the output (spider).