Overload Release Mechanical Clutches
(MOR & ORI)

Carlyle Johnson's MAXITORQ^® Overload Release mechanical clutch is comprised of our standard multiple disc mechanical clutch with overload release features. Designed to protect a machine and its products against damage resulting from accidental overloading, when an overload occurs, the overload release mechanical clutch automatically disengages. When the jammed condition has been cleared the clutch 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 clutch mates with a cammed drive cup on these clutches, and hub adapters are available if designed for a particular application. The cammed driving cup connects the overload release mechanical clutch with either the driven or driving device.

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

Features of MOR & ORI Mechanical Clutch Units

CJM's overload release mechanical clutch is 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 clutch models are available in single-position and multiple position units, to provide accurate registration. Limit switches can also be incorporated into the power input line. This type of mechanical clutch 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 clutch 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 clutch with ring type drive cup and hub adapters as a complete package designed for your application.

Specifications / Dimensions

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 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	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