Modified Stock Gearing - Boston Gear

Rack
48 through 3 Diametral Pitch (Nylon & Steel)
14-1/2° Pressure Angle (will not operate with 20° spurs)
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Pitch Nom- Mating Nylon Steel
Overall Line inal Spur
Thick- to Back Length Gear Catalog Item Catalog Item
ness (B) (Feet) Page # Number Code Number Code
48 DIAMETRAL PITCH FACE WIDTH = .125"
.125 .104
1
GP586-1 53899 – –
18
2 – – L501-2 12726
32 DIAMETRAL PITCH FACE WIDTH = .188"
1 GP583-1 53900 – –
.188 .156 2 18, 19 – – L503-2 12728
4 – – L503-4 12730
24 DIAMETRAL PITCH FACE WIDTH = .250"
1 GP579-1 53901 – –
.250 .208 2 19, 20 – – L505-2 12732
4 – – L505-4 12734
20 DIAMETRAL PITCH FACE WIDTH = .375"
2 – – L509-2 12736
.375 .325 4 20, 21 – – L509-4 12738
6 – – L509-6 12740
16 DIAMETRAL PITCH *FACE WIDTH = .313"
2 – – L510-2 12742
.312 .250
4
– – L510-4 12744
21, 22
4 – – L512-4 12746
.500 .438
6 – – L512-6 12748
12 DIAMETRAL PITCH FACE WIDTH = .750"
4 – – L514-4 12750
.500 .417
6
– – L514-6 12752
22, 23
.750 .667 4 – – L515-4 12754
6 – – L515-6 12756
10 DIAMETRAL PITCH FACE WIDTH = 1.000"
4 – – L516-4 37324
.625 .525
6
– – L516-6 37326
23, 24
4 – – L517-4 37328
1.000 .900
6 – – L517-6 37330
8 DIAMETRAL PITCH FACE WIDTH = 1.250"
4 – – L518-4 37332
.750 .625
6
– – L518-6 37334
24, 25
4 – – L519-4 37336
1.250 1.125
6 – – L519-6 37338
6 DIAMETRAL PITCH FACE WIDTH = 1.500"
4 – – L520-4 37340
1.000 .833
6
– – L520-6 37342
25, 26
4 – – L521-4 37344
1.500 1.333
6 – – L521-6 37346
5 DIAMETRAL PITCH FACE WIDTH = 1.750"
1.250 1.050
4
– – L522-4 37348
26
6 – – L522-6 37350
4 DIAMETRAL PITCH FACE WIDTH = 2.000"
1.500 1.250
4
– – L523-4 37352
27
6 – – L523-6 37354
3 DIAMETRAL PITCH FACE WIDTH = 3.000"
1.500 1.167
*Face Width of L512-4 and L512-6 = 1/2".
4
– – L524-4 37356
27
6 – – L524-6 37358
PITCH LINE
TO BACK
(B)
LENGTH
STANDARD TOLERANCES ‡
DIMENSION TOLERANCE
LENGTH † All + 1.00 – .000
1/8 – 3/4 + .000 – .002
FACE 1 – 1-1/2 + .000 – .003
WIDTH 1-3/4 – 2 + .000 – .004
3 + .000 – .006
†Ends not machined. Tolerance allows for cutting and
matching. Nylon Rack is molded in proper lengths to
permit end to end butting without interruption of tooth
spacing.
‡Steel only.
PITCH DIA
OF GEAR
(D)
GEAR
CENTER LINE
TO BACK OF RA
B + D
2
PITCH LINE
TO BACK
(B)
REFERENCE PAGES
Alterations — 314
Lubrication — 314
Materials — 315
CK
LENGTH
WIDTH
OVERALL
THICKNESS
FACE
WIDTH
OVERALL
THICKNESS
A
P-1930-BG 04/10 Boston Gear 800-825-6544 35