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Disc Pac Modules (MDP) Specifications

Advantages

  • Assemble to your own specifications
  • Simplicity of design offers high versatility
  • Compact and self contained
  • Completely assembled
  • No special tools for installation or maintenance
  • Disc design and finish ensure maximum wear-ability and smooth engagement

Operation

  • Torque range 10 lb. ft.- 2400 lb. ft.
  • Separator springs assure a drag-free neutral
  • Standard lugs configurations vary from 3 to 12 lugs depending upon torque rating, splines are also available
  • Can be run dry or in oil
Disc Pac Module Diagram

Specifications / Dimensions

Model Dyn. Torque (lb. ft.) St. Torque (lb. ft.) Max. Axial Force (lbs.) Min. Disc Travel (New) Min. Disc Travel (Worn) Body Bores (+.001) I Body Bores (-.001) I
MDP 21 13 26 225 .084 .220 3/4 7/8
MDP 22 27 54 470 .088 .239 1 1 1/8
MDP 23 53 106 550 .091 .243 1 1/4 1 3/8
MDP 24 92 184 800 .091 .243 1 1/2 1 5/8
MDP 25 158 316 1,150 .091 .273 1 3/4 1 7/8
MDP 26 263 526 1,650 .104 .259 2 2 1/4
MDP 27 525 1,050 2,260 .096 .522 2 1/2 2 3/4
MDP 28 788 1,576 2,350 .126 .456 2 3/4 3

Dyn = dynamic. St = static. Axial force represents force required. Body bores represent standard bores.

Model Keyway Driving Lugs
GM		 Lug Width
GM		 Length(±.003) B
D
L
Q
SM		 O.D.
VM		 H.P.*
MDP 21 3/16 x 3/32 3 .615 .950 1 5/16 1/16 1/64 1-63/64 2-3/16 1/4
MDP 22 3/16 x 3/32 3 .740 1.072 1 5/8 1/16 1/64 2-31/64 2-3/4 1/2
MDP 23 1/4 x 1/8 3 .990 1.234 2 1/8 1/16 1/64 3-15/64 3-9/16 1
MDP 24 5/16 x 5/32 3 .990 1.234 2 13/32 1/16 1/64 3-47/64 4-1/16 1 3/4
MDP 25 3/8 x 3/16 8 .740 1.505 2 3/4 1/16 1/64 4-31/64 4-7/8 3
MDP 26 7/16 x 7/32 12 .615 1.651 3 5/16 1/16 1/64 5-31/64 5-7/8 5
MDP 27 9/16 x 9/32 12 .740 2.077 4 3/4 1/16 1/32 6-63/64 7-1/2 10
MDP 28 9/16 x 9/32 12 .740 2.297 5 11/16 1/16 1/32 7-63/64 8-1/2 15

*At 100 RPM.

Disc Pac Driving Cups
Internal Flange Type Driving Cup
Drive Cup # A B D E F J* Mfg. Holes Slots
MMS-0021-106-300 2 3/16 1.033 - 1.031 1 1/32 3/16 23/32 8/32 3 3
MMS-0022-106-300 2 3/4 1.439 - 1.4375 1 1/4 3/16 13/16 10/32 3 3
MMS-0023-106-300 3 9/16 1.9395 - 1.9375 1 13/32 1/4 31/32 1/4-20 3 3
MMS-0024-106-300 4 1/16 2.0645 - 2.0625 1 7/16 9/32 31/32 5/16-18 3 3
MMS-0025-106-300 4 7/8 2.565 - 2.5625 1 23/32 5/16 1 5/32 5/16-18 5 8
MMS-0026-106-300 5 7/8 3.627 - 3.625 1 29/32 5/16 1 3/8 5/16-18 5 12
MMS-0027-106-300 7 1/2 4.753 - 4.750 2 5/16 5/16 1 21/32 7/16-14 5 12
MMS-0028-106-300 8 1/2 5.753 - 5.750 2 1/2 5/16 1 7/8 7/16-14 6 12

*Flathead screw size.
Internal Flange Driving Cups are low in inertia and smaller in outside diameter than Ring Type Driving Cups.

Ring Type Driving Cup
Drive Cup # A B D E F J* Mfg. Holes Slots
MMS-0021-106-400 3.123 - 3.125 2.015 - 2.017 1 1/32 2 9/16 11/32 1/4-20 3 3
MMS-0022-106-400 3.623 - 3.625 2.515 - 2.517 1 5/32 3 1/16 11/32 1/4-20 3 3
MMS-0023-106-400 4.623 - 4.625 3.265 - 3.267 1 5/16 3 15/16 13/32 5/16-18 3 3
MMS-0024-106-400 5.123 - 5.125 3.765 - 3.767 1 5/16 4 7/16 13/32 5/16-18 3 3
MMS-0025-106-400 6.123 - 6.125 4.515 - 4.517 1 19/32 5 5/16 17/32 3/8-16 4 8
MMS-0026-106-400 7.120 - 7.125 5.515 - 5.517 1 25/32 6 1/4 17/32 3/8-16 6 12
MMS-0027-106-400 9.120 - 9.125 7.015 - 7.017 2 3/16 8 1/16 11/16 1/2-13 6 12
MMS-0028-106-400 10.102 - 10.125 8.015 - 8.017 2 7/16 9 1/16 11/16 1/2-13 6 12

*Cap screw size.

In addition to our standard Disc Pac Modules (MDP), our engineering department can custom design and manufacture a new component to meet your specific requirements. If you have further questions or would like to discuss your specific needs, please contact us.


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