Spur Gears - Norfolk Bearings and Supply Company, Inc.

ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Pitch Line Nominal Mating Steel
Overall to Back Length Spur Gear Catalog Item
Thickness
20
(B) (Feet) Page No. Number Code
DIAMETRAL PITCH FACE WIDTH - .500”
16
.500 .450
4
42
L2020-4 12758
6 L2020-6 12760
DIAMETRAL PITCHFACE WIDTH - .750”
.750
12
.688
4
6
43
L2016-4
L2016-6
12762
12764
DIAMETRAL PITCH FACE WIDTH - 1.000”
1.000
10
.917
4
6
43 – 44
L2012-4
L2012-6
37320
37322
DIAMETRAL PITCH FACE WIDTH - 1.250”
1.250 1.150
4
6
44
L2010-4
L2010-6
37316
37318
8
DIAMETRAL PITCH FACE WIDTH - 1.500”
1.500 1.375
4
6
45
L208-4
L208-6
37312
37314
6
DIAMETRAL PITCH FACE WIDTH - 2.000”
1.500 1.333
4
6
45 – 46
L206-4
L206-6
37308
37310
5
DIAMETRAL PITCH FACE WIDTH - 2.500”
1.500 1.300
4
6
46
L205-4
L205-6
37304
37306
4
DIAMETRAL PITCH FACE WIDTH - 3.500”
2.000 1.750
4
–
L204-4 37300
6 L204-6 37302
PITCH LINE
TO BACK
(B)
LENGTH
Rack
20 through 4 Diametral Pitch (Steel)
20° Pressure Angle (will not operate with 14-1⁄2° spurs)
STANDARD TOLERANCES
DIMENSION TOLERANCE
LENGTH † All +1.000 – .000
1/2 – 3/4 +.000 – .002
FACE 1 – 1-1/2 +.000 – .003
WIDTH 2 – 2-1/2 +.000 – .004
3-1/2 +.000 – .006
†Ends not machined. Tolerance allows for cutting and
matching.
PITCH DIA
OF GEAR
(D)
GEAR
CENTER LINE
TO BACK OF RA
B + D
2
P-1930-BG 04/10 Boston Gear 800-825-6544 47
PITCH LINE
TO BACK
(B)
LENGTH
REFERENCE PAGES
Alterations — 314
Lubrication — 314
Materials — 315
CK
WIDTH
OVERALL
THICKNESS
FACE
WIDTH
OVERALL
THICKNESS
A