P Series: Stationary Cylinder for Precise Alignment

P Series
Sealed Ball Bearings for Positive Lubrication
The P series design is similar to the S series, which is designed for wet operation. The difference between the two models occurs in the bearings. P Series bearings are pre-lubricated and sealed and do not require external lubrication.

Torque ratings are based on the P Series disc pack operating in dry conditions thus requiring lower actuation pressure to achieve relatively high rates of torque.

 Features
  • Hydraulic or Pneumatic Actuation
  • Sealed Pre-lubricated Bearings
  • Dry Applications
  • Stationary Cylinder and Piston
  • Fast Response / Lower Inertia
  • Easy Installation
  • Minimal Actuating Flow
  • Positive Disengagement
  • Can be Modified to Meet Specific
  • Application Requirements

P Series Diagram

Hydraulic/Pneumatic Clutch For Dry Operation
 
P Series

Hydraulic/Pneumatic Clutch For Dry Operation

Operation: Pressurizing the cylinder with fluid or air forces the piston to clamp and lock the friction and separator discs, and release springs. Torque is transferred through the clutch to the drive cup. When pressure is removed, the release springs separate the separator and friction discs and maintain a running clearance between separator and friction disc surfaces. Torque ratings are based on dry operation, thus requiring low actuation pressure to achieve high rates of torque.

Lubrication:
P Series clutches and brakes are designed primarily for dry operation. Bearings are greased and sealed and do not require external lubrication.

P Series Torque and Speed Capacities @ 100 PSI (6.9) BAR
Model Unit Torque Max. RPM
350 Ft. lbs 323 3600
Nm 438
450 Ft. lbs 629 2700
Nm 853
550 Ft. lbs 1139 2200
Nm 1544
600 Ft. lbs 1609 2000
Nm 2182
700 Ft. lbs 2416 1600
Nm 3276
800 Ft. lbs 3609 1500
Nm 4894

*See the chart on page 7 for incremental torque ratings. 3. American National Pipe Thread. Modified standards available for specific design requirements.

Features

  • Maximum Torque / Minimum Envelope
  • Hydraulic or Pneumatic Actuation
  • Fast Engagement / Quick Release
  • Stationary Cylinder and Piston
  • Modified Standards for Specific Design Requirements

 

P Series Dimensions
P Series Dimensions

P Series Dimensions
Model Units E G F J N R S V W
350 in
mm		 3.50
89		 3.81
97		 6 .734
18.7		 3.88
98		 1.328 33.7 1.000
25.4		 0.22
5.5		 0.188
4.8
450 in
mm		 4.50
114		 4.88
124		 6 .797
20.2		 4.88
124		 1.656 42.1 1.000
25.4		 0.28
7		 0.219
5.6
550 in
mm		 5.50
140		 6.00
152		 12 .609
15.5		 5.94
152		 1.859 47.2 2.000
50.8		 0.31
8		 0.188
4.8
600 in
mm		 6.00
152		 6.56
167		 12 .609
15.5		 6.56
167		 2.000 50.8 2.000
50.8		 0.38
10		 0.188
4.8
700 in
mm		 7.00
178		 7.63
194		 12 .734
18.7		 7.69
195		 2.172 55.2 2.000
50.8		 0.38
10		 0.281
7.1
800 in
mm		 8.00
203		 8.63
219		 12 .734
18.7		 8.69
221		 2.406 61.1 2.500
63.5		 0.38
10		 0.344
8.7


Model Units A max.1 A max.2 D H3 K L X Y AA
350 in
mm		 1.188
30		 1.125
29		 2.370 60.5 1/8-27 0.45
11		 3.282 83.4 0.338
8.6		 0.058
1.5		 0.19
4.8
450 in
mm		 1.813
46		 1.750
44		 3.312 84.1 1/8-27 0.37
9		 3.817 97.0 0.346
8.8		 0.087
2.2		 0.07
1.7
550 in
mm		 2.313
59		 2.188
56		 3.820 97.0 1/4-18 0.37
9

4.326
109.9

 0.489
12.4		 0.083
2.1		 0.04
1.1
600 in
mm		 2.625
67		 2.500
64		 4.010
101.9		 1/4-18 0.36
9		 4.578 116.3 0.494
14.0		 0.099
2.5		 0.02
0.5
700 in
mm		 3.125
79		 2.938
75		 4.375
111.1		 1/4-18 0.39
10		 4.441 127.9 0.551
10.5		 0.108
2.7		 0.01
0.3
800 in
mm		 3.375
86		 3.250
83		 4.820
122.4		 1/4-18 0.46
12		 5.544 140.8 0.411
10.4		 0.155
3.9		 0.01
0.3

Notes:
Unless otherwise noted, upper value units are inches; lower value units are millimeters.

Customer to specify dimensions A, B and C. Hub bore dimension A not to exceed maximum allowable bore.
  1. Maximum allowable hub bore with standard rectangular key.
  2. Maximum allowable hub bore with standard square key.
  3. American National Pipe Thread.

A fixed orifice pressure regulated valve should be specified in the system to prevent over-pressurization of any Logan Clutch. The Logan warranty does not cover clutch failure due to over-pressurization. The highest pressure values in the torque tables are maximum ratings for Logan Clutches. All rotating components present a hazardous condition and should be guarded in accordance with OSHA requirements and other applicable laws, regulations and industrial standards.

Logan Clutch Corporation reserves the right to modify product specifications and designs without notice and without incurring obligations. Torque values are based upon disc packs having full contact between surfaces.
Operating Parameters


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

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

P Series Clutches
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.

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

  
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. Cylinder Volume: Upper value units are cubic inches; lower value units are cubic centimeters.
  3. 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.
  4. RPM: For higher operating speeds, contact Logan.

 
Static Torque Ratings
Static Torque Ratings Selection Procedure
P Series Wet Operation
Model PSI (Ratings in ft. lbs.)* Bar (Ratings in Nm)
60 70 80 90 100 4.1 4.8 5.5 6.2 6.9
350 168 207 246 284 323 228 281 334 385 438
450 329 404 479 554 629 446 548 650 751 853
550 610 742 874 1006 1139 827 1006 1185 1364 1544
600 881 1063 1245 1427 1609 1195 1441 1688 1935 2182
700 1332 1603 1874 2145 2416 1806 2174 2541 2909 3276
800 1964 2376 2787 3198 3609 2663 3222 3779 4336 4894
*P torque values based on dry operating conditions.
Maximum recommended operating pressure 100 PSI (6.9) BAR

A fixed orifice pressure valve should be specified in the system to prevent over-pressurization of any Logan Clutch. The Logan warranty does not cover clutch failure due to over-pressurization. The highest pressure values in the torque tables are maximum ratings for Logan Clutches.
Example: Select a wet environment clutch
HP = 150
Clutch Speed = 800 RPM
Service Factor= 1.3
Available operating pressure = 150 psi.
mathematical formula
T = 984 . 1.3 = 1280 lb. ft.
Choose model 800 in the R or S series.

 

Suggested Service Factor Table
Duty SF
Small inertia
Low Cycle Rate
Non-pulsating Load		 1.3 to 1.7
Large inertia
Low Cycle Rate
Non-pulsating Load		 1.7 to 2.2
Large inertia
High Cycle Rate Pulsating Load		 2.2 to 3.2
I. Calculate the torque requirement for the application using one of the following formula:
mathematical formula

II. Identify which service factor best identifies your application from the suggested service factor table located at the bottom of this page.

III. Adjust the torque requirement using the selected service factor.
T= Tc . SF or T=Tb . SF

IV. Decide which series best fits your drive.

V. Using the appropriate series torque pressure graph, determine the model size.

Vl. Determine if the Series and models can:
1) Accommodate the shaft and key
2) Operate at the required speed
3) Fit within the available space

Vll. Determine the Drive Cup Mounting

Vlll. Call or fax Logan Clutch Corporation to review your selection and place your order. Application fact sheets are available online or from Logan Clutch.
HP = Horsepower
RPM = Clutch or Brake shaft speed
SF = Service Factor
T= Required Torque (Ib ft.)
Tb = Brake Torque (Ib. ft.)
Tc = Clutch Torque (Ib. ft.)
t = Time to stop (seconds)
WK2 = Total inertia to be stopped
(Ib.ft.2)
0