Modified Stock Gearing - Boston Gear

Anti-Friction Bearings
2100 Series
Ball Bearings Sheaves; Unground
F
NR 2100 Series are unground, of pressed steel
construction with hardened raceways. For chain or belt
application.
C
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Catalog Item
A B C D E F H J No. Code
.372 2-1/4 19/32 7/8 9/16 1-5/8 15/32 15/32 NR2105 67151
2-5/8 1/2 5/8 13/16 2 3/8 3/8 NR2106 67152
3/8 3-1/4 19/32 11/16 1 2-11/16 15/32 7/16 NR2111-1 67154
3-3/8 19/32 11/16 1 2-11/16 15/32 7/16 NR2111 67153
3-3/8 19/32 7/8 1 2-11/16 15/32 7/16 NR2112 67155
1/2 3 5/8 15/16 1 2-13/16 1/2 1/2 NR2113 67156
4-15/16 3/4 7/8 1 4 5/8 9/16 NR2118 67157
5/8 4-7/16 5/8 3/4 1 3-7/8 27/64 27/64 NR2120 67158
B
F
A
D
E
Load Data
H
Load ratings are provided only as a guide
for bearing selection and are not to be used
for life calculation.
J
Radial Load Capacity in Pounds
Balls
Sheave
Revolutions Per Minute
Number 50 100 200 300 600 900 No. Diam.
NR2105 220 153 119 85 59 48 11 3/16
NR2106 356 247 170 137 96 78 10 1/4
NR2111-1
NR2111 327 232 163 135 92 78 10 5/16
NR2112
NR2113
NR2118 500 344 240 192 134 109 14 1/4
NR2120 293 208 146 121 82 70 14 1/4
STANDARD TOLERANCES
Dimensions
Tolerance
A All +.005 to -.000
196 Boston Gear 800-825-6544 P-1930-BG 04/10