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Multiple Disc Overload Release
Mechanical Brakes (MOR & ORI)

overload-clutch-mor

Carlyle Johnson's Overload Release mechanical brake is comprised of our standard multiple disc mechanical brake with overload release features. Designed to protect a machine and its products against damage resulting from accidental overloading, when an overload occurs, these mechanical / friction brakes automatically disengage. When the jammed condition has been cleared the brake can be reengaged and can return to operation.

The overload release occurs as a result of cams placed on the shifter sleeve and drive cup. When overloaded the discs slip, causing the cams to come into contact, which forces the shifter or sleeve into a neutral position.

The overload mechanical brake mates with a cammed drive cup, and hub adapters are available if designed for a particular application. The cammed driving cup connects the overload release mechanical brake with either the driven or driving device.

CJM can modify our standard multiple disc overload release mechanical brake products to meet your needs. Our engineering department can also design and develop custom mechanical / friction brakes to meet your specific requirements.

Specifications / Dimensions

Model refers to mechanical clutch size. Dardelet self-locking full dog point set screw must bottom in spotted hole in shaft. 5/16 set screw requires 7/32 hole 1/8 deep in customer's shaft; 7/16 in screw; 5/16 in hole 1/8 in deep. Bore sizes refer to standard bore (I).
Model Dyn. Torque (lb. ft.) Torque Adjust. Range (lb. ft.) Axial Sleeve Pressure (lb.) Min. Body Bores (+.001/-.001) Max. Body Bores (+.001/-.001)
MOR-0021999 20-40 13 20 3/4 7/8
MOR-0022999 40-80 27 30 1 1 1/8
MOR-0023999 80-160 53 30 1 1/4 1 3/8
MOR-0024999 140-280 92 40 1/2 1 5/8
MOR-0025999 240-380 158 60 1 3/4 1 5/8
MOR-0026999 400-800 263 80 2 2 1/4
MOR-0027999 800-1600 525 105 2 1/2 2 3/4
MOR-0028999 1200-2400 788 150 2 3/4 3
 
Model Keyway Max. Body Bores A B Throw
D		 J K L OM P W X
MOR-0021999 3/16 x 3/32 2.594 3.000 .375 .500 .938 2.125 1.641 .625 3.125 .125
MOR-0022999 3/16 x 3/32 3.188 3.469 .438 .500 1.063 2.625 1.938 .703 3.625 .172
MOR-0023999 1/4 x 1/8 3.938 4.031 .531 .625 1.234 3.25 2.266 .797 4.625 .188
MOR-0024999 5/16 x 5/32 4.250 4.031 .531 .625 1.234 3.563 2.266 .797 5.00 .188
MOR-0025999 3/8 x 3/16 4.938 4.813 .609 .750 1.438 4.063 2.719 .953 5.875 .203
MOR-0026999 7/16 x 7/32 5.469 5.000 .609 .750 1.438 4.625 2.906 .953 6.625 .203
MOR-0027999 9/16 x 9/32 7.594 6.344 .875 .812 1.750 6.500 3.75 1.125 9.125 .313
MOR-0028999 9/16 x 9/32 8.625 6.563 .875 .812 1.750 7.500 3.989 1.125 10.125 .313
O.R. Ring Type Driving Cup D Specifications  
Cup Size Bolt Circle
C		 Thru Holes Drilled Holes
E		 Cap Screw Size F M N Ring I.D.
R		 U
MOR-0021-106-600 2.563 3 .266 1/4 120 1/4 3.125 - 3.123 .344 2.017 - 2.015 1.013
MOR-0022-106-600 3.063 3 .266 1/4 120 1/4 3.625 - 3.623 .344 2.517 - 2.515 1.156
MOR-0023-106-600 3.313 3 .344 5/16 120 1/4 4.625 - 4.623 .469 3.267 - 3.265 1.313
MOR-0024-106-600 4.438 3 .344 5/16 120 1/4 5.125 - 5.123 .469 3.767 - 3.765 1.313
MOR-0025-106-600 5.313 4 .406 3/8 90 1/4 6.125 - 6.123 .578 4.517 - 4.515 1.594
MOR-0026-106-600 6.250 6 .406 3/8 60 1/4 7.125 - 7.120 .594 5.517 - 5.515 1.781
MOR-0027-106-600 8.063 6 .531 1/2 60 1/4 9.125 - 9.120 .203 7.017 - 7.015 2.188
MOR-0028-106-600 9.063 6 .531 1/2 60 1/4 10.125 - 10.120 .813 8.017 - 8.015 2.438

In addition to our standard Multiple Disc Overload Release Mechanical Brakes (MOR & ORI), 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.

Images & Drawings

overload-clutch-mor-dimensions

Features of MOR & ORI Mechanical Brakes

CJM's overload release mechanical / friction brakes are designed for easy, on-line adjustment, allowing users to compensate for wear, and to adjust release settings over a wide range of torque values.

MOR and ORI mechanical brake units are available in single-position and multiple position units, to provide accurate registration. Limit switches can also be incorporated into the power input line. These mechanical / friction brakes may be used on a continuous shaft, or as a cut-off coupling type for connecting two shafts.

Special overload release shifters are also available, for brake sizes 20 – 26. Shoes and studs are available for all sizes, including 27 and 28, for riveting into shifter yokes that have been designed by the customer.

Carlyle Johnson can furnish the overload release mechanical brake with ring type drive cup and hub adapters as a complete package designed for your application.

Advantages

  • Safety protection for operators and machines eliminates shutdowns
  • Easy on-line adjustment
  • Easy on-line manual adjustment allows for fine-tuning
  • Highest torque in the smallest space

Operation

  • Torque range 10 lb. ft.- 2400 lb. ft.
  • Recommended where excessive torsional loading from heavy shock or sudden over normal load are present
  • Automatically disengages – will not transmit any torque until reengaged
  • Drag-free neutral

Customization

  • Single position and multiple position units
  • Special overload release shifters available for sizes 20-26
  • Limit switches available
  • Custom designs and alterations available

Downloads

product-paper-tech-paper-ringfeder-locking-assemblies-en-11-2022

MOR & ORI Brake Specification Sheet
installation-and-operations-manual-ringfeder-locking-assemblies-rfn-7006-en-08-2019

Upload a CAD for a custom mechanical brake design.

Further downloads including certificates, instruction manuals and product images are available to you in our Download Center:

Downloads