'M' Series Sprag Clutches0 pages

“M” Series Sprag Clutches
Fully sealed, bearing supported, high torque
Sprag Clutch Assemblies with Metric and Imperial Bores.

CROSS+MORSE

“M” series sprag clutches use precision cams made of high chrome alloy steel, hardened
and honed for accurate shape. A unique finishing process ensures smooth cam surface
providing uniform contact with both races for even load distribution and prolonged
clutch life. High capacity bearings are used to accommodate radial and axial loads.
The clutches are designed to mount directly on through shafts; the torque being
transmitted by a matching key provided with each stock bore; the outer race has a
precision ground diameter with tapped holes on each face to enable the fitting of
gears, sprockets, pulleys, etc.

Power Transmission Solutions

Te l
+44 121 360 0155

Four types of clutch are offered:

Fax

MG Series - Standard clutch for general overrunning, backstop and index applications,
standard oil lubricated with option of grease.
1
/4 UNF Lubrication
MI Series - Has special sprag assembly designed for high speed indexing.
Holes
Always oil filled for optimum performance.
MO Series - Fitted with labyrinth seals for minimal drag on
higher speed overrun and backstop applications.
Always grease lubricated.
MR Series - Utilises a special sprag cage arrangement to allow
high speed overrunning of the outer race.
Oil lubricated clutch suitable as a higher torque
alternative to Roller Ramp clutches.
Vertical Shafts - Clutches suitable for vertical shafting can be
supplied - contact Cross & Morse sales office for
technical advice.
High Speed/Temperature Operation - Clutches can be provided
with a patented venting system for applications
subject to high temperature variation or
overrunning at high speed.
Std. Bore & Key Sizes (1)
Clutch Torque
Model Capacity
Number
Nm

Max Overrun
Speed RPM
Inner(4) Outer

MG 300
MI 300
MO 300
MR 300
MG 400
MI 400
MO 400
MR 400

373

542

2900
–
3600
800

800
–
800
2900

2700
–
3600
800

800
–
800
2700

Nominal
Overrun
Drag
Nm

Bore ins (3)

Key

Bore ins (3) Key

A

B

C

D

E

F

No. (2) Thread Usable Approx
Tapped Size Thread Weight
Holes U.N.F. Depth
kg
mm

3/16x3/16

15mm 5x5

76.20
76.15

66.7

60.3

63.5

28.6

–

4

1/4-28

13

1.8

.28

3/4, 7/8

3/16x3/16

18mm 6x6
20mm 6x6

88.90
88.85

73.0

66.7

69.9

31.7

–

4

5/16-24

16

2.7

750
–
750
2400

.52

1, 11/4

1/4x1/4

25mm 8x7
30mm 8x7

107.95
107.90

92.1

85.7

88.9

44.4

–

4

5/16-24

16

5.0

.85

11/2, 13/4
2

3/8x3/8
1/2x7/16

38mm
40mm
45mm
50mm

10x8
12x8
14x9
14x9

136.53
136.47

120.7

92.9

95.3

69.8

–

6

5/16-24

16

8.6

1/2x1/2
5/8x5/8
5/8x7/16

60mm
65mm
70mm
75mm
80mm

18x11
18x11
20x12
20x12
22x 9

180.98
180.92

158.8

123.8

127.0

101.6

–

8

3/8-24

19

19.5

5/8x5/8
3/4x3/4
3/4x5/8
3/4x9/16

70mm
75mm
80mm
85mm

20x12
20x12
22x14
22x14

222.25
222.20

177.8

149.2

152.4

108.0

152.4

8

1/2-20

25

38

85mm
90mm
100mm
110mm

22x14
25x14
28x16
28x16

254.00
253.95

227.0

149.2

152.4

139.7

190.5

8

1/2-20

25

48

100mm 28x16
120mm 32x18
130mm 32x18

304.80
304.72

247.6

158.7

161.9

165.1

222.2

10

5/8-18

32

72

5, 51/4, 57/16, 51/2 11/4x11/4 130mm 32x18
53/4, 515/16, 6 11/4x11/16 150mm 36x20
61/4, 67/16
11/4x1
160mm 40x22

381.00
380.92

298.5

171.4

177.8

196.8

266.7

12

5/8-18

32

115

1592

2400
–
3000
750

MG 600
MI 600
MO 600
MR 600

3050

1800
–
2400
700

700
–
700
2100

6780

1200
–
2000
400

400
–
400
1750

MG 750
MR 750
MI 750

9500

1800
525
–

600
2600
–

3.4

27/16,21/2, 23/4
215/16, 3
31/4
37/16

MG 800
MR 800
MI 800

17625

1300
475
–

475
2100
–

5.4

3, 31/4
37/16, 31/2, 33/4
315/16, 4
41/4
47/16

3/4x3/4
7/8x7/8
1x1
1x7/8
1x3/4

MG 900
MR 900
MI 900

24400

1200
400
–

400
1850
–

6.8

4, 41/4, 47/16
41/2, 43/4
415/16, 5
51/4, 57/16

1x1
1x1
1x7/8
1x3/4

MG 1000
MR 1000
MI 1000

33900

1200
325
–

325
1600
–

8.2

1.76

2, 21/4
21/2, 23/4
3, 31/4

sales@crossmorse.com

5/8, 3/4

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MG 500
MI 500
MO 500
MR 500

MG 700
MI 700
MO 700
MR 700

Dimensions in mm

Metric

Imperial

(1) Std. bores clutches normally available 24 hour despatch. Other bore sizes can be supplied to order. Clutches shipped with key.
(2) Mounting holes equally spaced except 700& 750 which have 6 equi-spaced plus two 30˚ from equi-spaced holes 180˚ apart.
(3) Bores to H7 tolerance except Imperial bores on MG 750-1000 which are to M7 tolerance.
(4) This also maximum drive speed MR series clutches.
Note: All oil filled clutches must be lubricated prior to operation.

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