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Multiple Disc Mechanical Clutches (MMS/MMD) Specifications

Advantages

  • Highest torque in the smallest space
  • High performance and long-life
  • Simplicity of design, greater adaptability
  • "Floating Disc Packs" - reduce drag, abrasion and heat build-up in neutral as well as provide consistent release
  • Easy on-line manual adjustment allows for fine-tuning of the device
  • Shipped assembled and ready to install

Operation

  • Torque range 10 lb. ft. - 2400 lb. ft.
  • 1 HP to 150 HP capacity
  • Positive engagement / disengagement possible at any speed
  • All units run in oil or dry applications
Multiple Disc Clutch Diagram

Specifications / Dimensions

Clutch # HP at 100 RPM Dyn. Torque (ft/lbs) St. Torque (ft/lbs) Axial Sleeve Pressure(lbs) I Body Bores(+.001) I Body Bores(-.000) Keyway
20** .100 5 10 15 1/2 5/8 **
21 .250 13 26 20 3/4 7/8 3/16 x 3/32
22 .500 27 54 30 1 1 1/8 3/16 x 3/32
23 1.000 53 106 30 1 1/4 1 3/8 1/4 x 1/8
24 1.750 92 184 40 1 1/2 1 5/8 5/16 x 5/32
25 3.000 158 316 60 1 3/4 1 7/8 3/8 x 3/16
26 5.000 263 526 80 2 2 1/4 7/16 x 7/32
27 10.000 525 1050 105 2 1/2 2 3/4 9/16 x 9/32
28 15.000 788 1576 150 2 3/4 3 9/16 x 9/32

** Single clutch only.
**No. 20 clutch uses 3/16" roll pin in place of set screw and keyway. No. 20 clutch is not a stock item.

Clutch # Disc Lugs Sngl
A
Sngl
B
Dbl
B
Sngl/Dbl
D
Sngl/Dbl
J
Sngl/Dbl
K
Sngl/Dbl
L
20** 3 2.594 2.375 - .375 .375 .855 2.125
21 3 2.594 3.000 4.750 .375 .500 1.125 2.125
22 3 3.188 3.469 5.531 .438 .500 1.281 2.625
23 3 3.938 4.031 6.469 .531 .625 1.469 3.125
24 3 4.250 4.031 6.469 .531 .625 1.469 3.563
25 8 4.938 4.813 7.719 .609 .750 1.719 4.063
26 12 5.469 5.000 8.094 .609 .750 1.719 4.625
27 12 7.469 6.344 10.438 .875 .812 2.063 6.500
28 12 8.625 6.563 10.875 .875 .812 2.063 7.500

** Single clutch only.

Clutch # Sngl
N
Sngl/Dbl
OM
Sngl
P
Sngl/Dbl
Q
Sngl/Dbl
SM
Sngl/Dbl
VM
Sngl/Dbl
X*
20** .063 1.313 .563 .125 1.984 2.188 ***
21 .063 1.641 .625 .024 1.984 2.188 5/16 -18
22 .063 1.938 .703 .016 2.484 2.750 5/16-18
23 .063 2.266 .797 .016 3.234 3.563 7/16-16
24 .063 2.266 .797 .016 3.266 4.063 7/16-16
25 .094 2.719 .953 .031 4.484 4.875 7/16-16
26 .094 2.906 .953 .031 5.484 5.875 7/16-16
27 .094 3.750 1.125 .031 6.984 7.500 7/16-16
28 .094 3.989 1.125 .031 7.984 8.500 7/16-16

* Dardelet self-locking full dog point set screw must bottom in spotted hole in shaft.
** Single clutch only.
**No. 20 clutch uses 3/16" roll pin in place of set screw and keyway. No. 20 mechanical clutches are not a stock item.

Multiple Disc Cup Diagrams
Internal Flange Driving Cups
Cup # A B D E H J* Mtg. Holes Slots
MMS-0021-106-300 2.188 1.033 - 1.031 1.031 .188 1.500 8 3 3
MMS-0022-106-300 2.750 1.4395 - 1.4375 1.250 .188 1.938 10 3 3
MMS-0023-106-300 3.563 1.9395 - 1.9375 1.406 .250 2.563 1/4 3 3
MMS-0024-106-300 4.063 2.0645 - 2.0625 1.438 .281 2.875 5/16 3 3
MMS-0025-106-300 4.875 2.5645 -2.5625 1.719 .313 3.500 5/16 5 8
MMS-0026-106-300 5.875 3.627 - 3.625 1.906 .313 4.500 5/16 5 12
MMS-0027-106-300 7.500 4.753 - 4.750 2.313 .313 5.813 7/16 5 12
MMS-0028-106-300 8.500 5.753 - 5.750 2.500 .313 6.813 7/16 6 12

*FL

Ring Driving Cups
Cup # A B D H I J* Mtg. Holes Slots
MMS-0020-106-400 3.123 - 3.125 2.015 - 2.017 .688 2.563 .343 1/4 3 3
MMS-0021-106-400 3.123 - 3.125 2.015 - 2.017 1.031 2.563 .343 1/4 3 3
MMS-0022-106-400 3.623 -3.625 2.515 - 2.517 1.156 0.188 .343 1/4 3 3
MMS-0023-106-400 4.623 - 4.625 3.265 - 3.267 1.313 3.938 .406 5/16 3 3
MMS-0024-106-400 5.123 - 5.125 3.765 - 3.767 1.313 4.438 .410 5/16 3 3
MMS-0025-106-400 6.123 - 6.125 4.515 - 4.517 1.594 5.313 .531 3/8 4 8
MMS-0026-106-400 7.120 - 7.125 5.515 - 5.517 1.781 6.250 .531 3/8 6 12
MMS-0027-106-400 9.120 - 9.125 7.015 - 7.017 2.188 8.063 .690 1/2 6 12
MMS-0028-106-400 10.120 - 10.125 8.015 - 8.017 2.438 9.063 .680 1/2 6 12

*Cap screw size

In addition to our standard Multiple Disc Air Clutch Units, 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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