Spur Gears - Norfolk Bearings and Supply Company, Inc.

NYLON BALL RETAINERS (TN) standard on all sizes.
SINGLE LIP CONTACT SEALS effectively retain
lubricant and exclude foreign material.
GREASE PACKED as standard on all “Double Sealed”
Type DL and DLG.
SPECIAL FEATURES including dimensions, tolerances,
single or without seals, steel retainers available on special
order if quantity warrants.
SNAP RINGS included on all Type DLG sizes. Type DL
sizes include snap ring groove but no snap rings
furnished.
D
E
C D
B
R
7500 DL
DOUBLE SEAL
A
F
G
H
J
7500 DLG
DOUBLE SEAL
WITH SNAP RING
Anti-Friction Bearings
7500 Series
Radial Ball Bearings; Ground, Single Row
STANDARD TOLERANCES
Dimensions Tolerance
A All +.0000 to –.0005
B
1.7500
2.0000-2.5625
+.0000 to –.0005
+.0000 to –.0006
C All +.000 to –.005
E All +.000 to –.005
G All ±.005
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
R Balls DL Series DLG Series
A B C D E F G H J Radius
*
No. Dia.
Catalog
Number
Item
Code
Catalog
Number
Item
Code
.5000 7508DL 50587 7508DLG 50581
.6250 1.7500 5/8 1/16 3/4 .993 .136 .042 1-59/64 .035 8 1/4 7510DL 50588 7510DLG 50582
.7500 7512DL 50589 7512DLG 50583
1.0000 2.0000 5/8 1/16 3/4 1.290 .136 .042 2-5/32 .035 10 1/4 7516DL 50591 7516DLG 50585
1.2500 2.5625 3/4 1/16 7/8 1.631 .190 .065 2-49/64 .035 9 3/8 7520DL 50592 7520DLG 50586
*Maximum fillet on shaft or housing which bearing will clear.
For recommended shaft and housing fits, see engineering section, page 238.
Basic Radial Capacity (Lbs.) Max.
Bearing Revolutions Per Minute Thrust
Number 50 100 300 500 1000 1200 1800 2500 3600 5000 Lbs.
7508-7512 1180 940 650 550 435 410 360 320 285 255 340
7516 1365 1085 750 635 505 475 415 370 330 295 375
7520 2640 2100 1460 1230 975 915 805 715 635 570 740
Load Data
The indicated load ratings
are based on 2500 hours
average life (L 50 ). To
determine the load ratings
at 3500 and 5000 hours,
90 percent and 80 percent
respectively, of the above
ratings should be used.
P-1930-BG 04/10 Boston Gear 800-825-6544 187
F