Volver

Bore Specifications



Couplings will be bored in accordance with AGMA Standard 9002-A86 for flexible couplings. Finished bore hubs will be Class I clearance fit unless otherwise specified.

Bore Sizes

Shaft Dia.   Class 1
Clearance Fit		   Interference
Fit		   Shaft
Dia.		   Class 1
Clearance Fit		   Interference
Fit
1/2 .500-.501 .4990-.4995 2-3/8 2.3750-2.3765 2.373-2.374
5/8 .625-.626 .6240-.6245 2-1/2 2.5000-2.5015 2.498-2.499
3/4 .750-.751 .7490-.7495 2-5/8 2.6250-2.6265 2.623-2.624
7/8 .875-.876 .8740-.8745 2-3/4 2.7500-2.7515 2.748-2.749
1 1.000-1.001 .9990-.9995 2-7/8 2.8750-2.8765 2.873-2.874
11/8 1.125-1.126 1.1240-1.1245 3 3.0000-3.0015 2.998-2.999
11/4 1.250-1.251 1.2490-1.2495 3-1/4 3.2500-3.2515 3.2470-3.2485
13/8 1.375-1.376 1.3740-1.3745 3-1/2 3.5000-3.5015 3.4970-3.4985
11/2 1.500-1.501 1.4990-1.4995 3-5/8 3.6250-3.6265 3.6220-3.6235
15/8 1.625-1.626 1.623-1.624 3-3/4 3.7500-3.7515 3.7470-3.7485
13/4 1.750-1.751 1.748-1.749 4 4.0000-4.0015 3.9970-3.9985
17/8 1.875-1.876 1.873-1.874 4-1/2 4.500-4.502 4.4965-4.4980
2 2.000-2.001 1.998-1.999 5 5.000-5.002 4.9965-4.998
21/8 2.1250-2.1265 2.123-2.124 5-1/2 5.500-5.502 5.4960-5.4975
21/4 2.2500-2.2515 2.248-2.249 6 6.000-6.002 5.9960-5.9975
Steel hub material is recommended for interference fit application. Consult Rexnord for unlisted sizes or bores over 6-inch diameter.


Nominal
Shaft
Diameter		 Keyway Setscrew Dia. Class 2B
NC Thread		 Recommended
Tightening
Torque
(In. Lbs.)
Width Depth
Over Thru Sq. Rect.
5/16
7/16
9/16		 7/16
9/16
7/8		 3/32
1/8
3/16		 3/64
1/16
3/32		 ...
3/64
1/16		 1/4-20 87
7/8
1-1/4
1-3/8		 1-1/4
1-3/8
1-3/4		 1/4
5/16
3/8		 1/8
5/32
3/16		 3/32
1/8
1/8		 3/8-16* 290
1-3/4 2-1/4 1/2 1/4 3/16 1/2-13** 620
2-1/4 2-3/4 5/8 5/16 7/32 5/8-11 1325
2-3/4 3-1/4 3/4 3/8 1/4 3/4-10 2400
3-1/4 3-3/4 7/8 7/16 5/16 7/8-9 5200
3-3/4
4-1/2
5-1/2
6-1/2
7-1/2		 4-1/2
5-1/2
6-1/2
7-1/2
9		 1
1-1/4
1-1/2
1-3/4
2		 1/2
5/8
3/4
7/8
1		 3/8
7/16
1/2
3/4
3/4		 1-8 7200
* Maximum setscrew diameter is 1/4-20 UNC for size #2 hub.
** Maximum setscrew size for hub sizes #3 thru #10 is 3/8-16 UNC.

FINISHED STOCK BORE HUBS
(STRAIGHT BORE HUBS BORED IN ACCORDANCE WITH AGMA STANDARD 9002 ­ A86 CLASS 1 CLEARANCE FIT)

SIZE 2SHSB 3SHSB 4SHSB 5SHSB 10SHSB 20SHSB 30SHSB 40SHSB 50SHSB 60SHSB
BORE STD STL STD STL STD STL STD STL STD STL STD STL STD STL STD STL STD STL STD STL
5/8 x   x   x                              
3/4 x x x x x   x                          
7/8 x x x x x x x   x                      
15/16         x   x                          
1 x x x x x x x   x                      
1-1/16         x   x                          
1-1/8 x x x x x x x x x x x x                
1-3/16         x   x                          
1-1/4     x x x   x   x   x x                
1-5/16         x   x                          
1-3/8     x x x x x x x x x x                
1-7/16         x   x   x                      
1-1/2         x   x   x   x x x   x          
1-9/16         x       x                      
1-5/8         x x x x x x x x x x x x        
1-11/16             x   x   x x x              
1-3/4             x   x   x x x   x   x      
1-7/8             x x x x x x x x x x x      
1-15/16                 x   x                  
2                 x   x x x x         x  
2-1/8                 x   x x x x x   x   x  
2-3/16                     x                  
2-1/4                     x   x   x   x      
2-3/8                     x x x x x x x   x  
2-1/2                         x   x          
2-11/16                         x   x          
2-3/4                         x x x x        
2-7/8                         x x x   x   x  
3-5/16                                 x   x  
3-3/8                             x x x   x  
Hub Material Specifications:
STD - High strength sintered steel (sizes #2-#10) and cast iron (sizes #20 and above).
STL - Low carbon steel

E-17
Volver