Specifications

ORC SERIES, MODEL S CLUTCHES
ORC Series, Model S
4
BOSTON GEAR
BOSTON GEAR
®
TABLE 4 - TYPE B HOUSING DIMENSIONS
F
Size A B C D E +.000 G
-.002
1 .81 .81 1.06 .11 .31 1.500 .69
2 .90 1.25 1.37 .18 .37 1.875 .81
3 1.25 1.62 1.94 .29 .50 2.750 .94
4 1.56 2.12 2.37 .43 .56 2.828 1.48
5 1.94 2.62 3.00 .58 .69 4.000 1.62
6 2.62 3.50 3.87 .90 .87 5.500 2.00
Note:
The “E” Dimension on Table 4 shows pawl trunnion holes. These
holes are not through holes and they should be avoided when
mounting a coupling, sprocket, etc. to the clutch.
"B"
"C"
"A"
"D"
"E" Dia. Typ.
"G"
"F"
Dia.
FIGURE 8 – TYPE B HOUSING CONFIGURATION
TABLE 3 - TYPE T MOUNTING HOLE PATTERNS
Pilot Dia.
Size Thread Depth
Bolt
+.000
Circle
-.002
1 1/4-20 .50 2.375 1.875
2 5/16-18 .50 3.000 2.250
3 3/8-16 .62 4.125 3.250
4 1/2-13 .87 5.000 3.203
5 5/8-11 1.00 6.250 4.125
6 5/8-11 1.00 8.750 6.000
Notes:
1. Mounting bolts must be minimum 160,000 PSI tensile, Rc 36-43.
2. Dowel pins must be minimum 150,000 PSI shear, Rc 50-58 core
hardness.
3 Tapped Holes at 120º
20 Typ.
20º
60º
1 Dowel Hole at 60º
Sizes 1 and 2 Mounting Hole Pattern
4 Tapped Holes at 90º
0 Typ.
15º
60º
30º
1 Dowel Hole at 30º
6 Tapped Holes at 60º
60º Typ.
14úº
20º
14º
1 Dowel Hole at 14º
Sizes 5 and 6 Mounting Hole PatternSizes 3 and 4 Mounting Hole Pattern
FIGURE 7 – TYPE T STANDARD MOUNTING HOLE PATTERNS