R Series
Model (lb) (lb-ft2) Clutch Speed (RPM)2 Cylinder Volume3 Actuating Flow4
(kg) (kgm2) Max. Disengaging new disc worn disc GPM (LPM)
350 3.8
1.7		 0.04
0.002		 6700 2700 0.8
13		 1.2
2.0		 2.0
8
450 6.9
3.1		 0.13
0.01		 4600 2500 1.5
25		 2.5
41		 4.0
15
550 13
5.9		 0.34
0.01		 3800 1800 2.0
33		 3.8
62		 5.2
20
600 17
7.7		 0.55
0.02		 3500 1500 2.6
43		 6.0
98		 6.8
26
700 24
10.9		 1.07
0.04		 3000 1400 3.3
54		 8.5
139		 .8.6
33
800 34
15.4		 2.01
0.08		 2600 1300 16.6
272		 22.0
361		 43.0
163
900 48
21.8		 3.51
0.15		 2300 1200 16.0
262		 21.0
344		 42.0
159

S Series
Model (lb) (lb-ft2) Max. Speed Cylinder Volume3 Actuating Flow4
(kg) (kgm2) (RPM)5 new disc worn disc GPM (LPM)
250 2
0.9		 0.004
0.0002 		5000 0.35
5.7		 0.59
9.7		 0.9
3.5
300 3
1.4		 0.009
0.0004 		4300 0.44
7.2		 0.74
12		 1.2
4.6
350 5.4
2.4		 0.02
0.001 		3200 0.7
11		 1.0
16		 1.7
6.4
400 7
3.2		 0.04
0.002 		2700 0.72
12		 1.2
20		 1.9
7.2
450 10.7
4.9		 0.09
0.004 		2400 1.0
16		 2.5
41		 2.6
10
550 18.4
8.3		 0.22
0.01		 2000 1.5
25		 3.8
62		 4.0
15
600 24
10.9		 0.35
0.01 		1900 2.0
33		 6.0
98		 5.2
20
700 35
15.9		 0.67
0.03 		1600 3.3
54		 7.5
123		 8.6
33
800 51
23.1		 1.24
0.05		 1400 4.2
69		 10.0
164		 11.0
42
900 68
30.8		 2.36
0.10 		1300 6.0
98		 11.0
180		 16.0
61

P Series
Model (lb) (lb-ft2) Max. Speed Cylinder Volume3 Actuating Flow4
(kg) (kgm2) (RPM)5 new disc worn disc GPM (LPM)
350 5.9
2.7		 0.02
0.001 		3600 0.8
13		 1.2
20		 1.8
7
450 12.0
5.4		 0.10
0.004 		2700 1.5
25		 2.5
41		 2.6
10
550 22.0
10.0		 0.26
0.01 		2200 2.0
33		 3.8
62		 4.0
15
600 28.0
12.7		 0.40
0.02 		2000 2.6
43		 6.0
98		 5.2
20
700 40.0
18.1		 1.11
0.05		 1600 3.3
54		 7.3
120		 8.6
33
800 57.0
25.9		 2.02
0.08 		1500 4.0
66		 12.0
197		 11.0
42
 
Operating Parameter Notes:
Logan Seals / O-Rings are provided in a fluorocarbon elastomer having a 70 durometer. Operating temperature range is -15 to 400 degrees F (-26 to 204 degrees C).
  1. Clutch weight: Based upon minimum hub bore. Does not include drive cup and friction discs.
  2. R Series: Maximum speed in the R Series at which release springs will overcome the centrifugal head due to fluid remaining in the actuating cylinder. Modified springs are available for heavy duty applications.
  3. Cylinder Volume: Upper value units are cubic inches; lower value units are cubic centimeters.
  4. Actuating Flow: Based upon an actuating time of 0.1 second. Upper value units are gallons per minute; lower value units are liters per minute.
  5. RPM: For higher operating speeds, call Logan.

Logan Outperforms
Electromagnetic Clutches!
Logan has the design and manufacturing capability to replace existing and obsolete electromagnetic clutches with Logan technology.
Logan vs. Electromagnetic Clutches

  • Transmits more Torque and has higher RPM
    capabilities within the same envelope
  • Eliminates residual DC magnetism in disc packs
    and bearings-reduces downtime
  • Disc Pack, Bearing Kits and Seal Kits for Logan
    clutches are available from stock

Air clutch vs electric clutch

View of a modified standard Logan S 300 Series clutch (right) which replaced an Ortlinghaus style electromagnetic clutch (left). The clutch, drive cup and disc pack were modified on the Logan S300 to fit within the existing Electromagnetic clutch envelope.

Air Clutch vs electric clutch

Side view showing identical axial length, and 3-disc pack Configuration of the Logan S300 and Ortlinghaus style clutch.
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