Modified Stock Gearing - Boston Gear
Modified Stock Gearing - Boston Gear
Modified Stock Gearing - Boston Gear
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Spur <strong>Gear</strong>s<br />
48 Diametral Pitch (Delrin)<br />
20° Pressure Angle (will not operate with 14-1⁄2° spurs)<br />
A<br />
FACE<br />
PITCH<br />
DIA.<br />
STANDARD TOLERANCES *<br />
DIMENSION TOLERANCE<br />
BORE All +.001 – .000<br />
*<strong>Gear</strong>s with Brass Inserts only.<br />
48 D.P.<br />
REFERENCE PAGES<br />
Alterations — 314<br />
Materials — 315<br />
HUB<br />
PROJ.<br />
BORE<br />
OVERALL<br />
LENGTH<br />
†All YPB gears have setscrews.<br />
HUB<br />
DIA.<br />
BORE<br />
SETSCREW<br />
1/8 #2-56<br />
3/16 #4-40<br />
1/4 #6-32<br />
ALL DIMENSIONS IN INCHES<br />
ORDER BY CATALOG NUMBER OR ITEM CODE<br />
Style Without Keyway<br />
No. Hub See or Setscrew †<br />
of Pitch Page Catalog Item<br />
Teeth Dia. Bore Dia. Proj. 315 Number Code<br />
48<br />
Face = .125"<br />
Outside Dia. = Pitch Dia. + .042"<br />
DIAMETRAL PITCH<br />
Overall Length = .125" + Hub Proj.<br />
MOLDED DELRIN<br />
44 .917<br />
.188 .55<br />
YP4844 53926<br />
45 .938 YP4845 53927<br />
48 1.000 YP4848 53928<br />
52 1.083 YP4852 53929<br />
54 1.125 YP4854 53930<br />
56 1.168 YP4856 53931<br />
60 1.250 YP4860 53932<br />
64 1.333<br />
.250 .61 .25 B<br />
YP4864 53933<br />
66 1.375 YP4866 53934<br />
72 1.500 YP4872 53935<br />
80 1.667 YP4880 53936<br />
84 1.750 YP4884 53937<br />
96 2.000 YP4896 53938<br />
100 2.083 YP48100 53939<br />
108 2.250 YP48108 53940<br />
120 2.500 YP48120 53941<br />
MOLDED DELRIN WITH BRASS INSERTS<br />
18 .375<br />
.31<br />
YPB4818 53942<br />
19 .396 YPB4819 53943<br />
20 .417<br />
.34<br />
YPB4820 53944<br />
21 .438<br />
.125<br />
YPB4821 53945<br />
22 .458<br />
.38<br />
YPB4822 53946<br />
23 .479 YPB4823 53947<br />
24 .500<br />
.40<br />
YPB4824 53948<br />
25 .521 YPB4825 53949<br />
26 .542<br />
.45<br />
YPB4826 53950<br />
27 .562 YPB4827 53951<br />
28 .583<br />
.48<br />
YPB4828 53952<br />
29 .604 YPB4829 53953<br />
30 .625 .50 A YPB4830 53954<br />
31 .646 YPB4831 53955<br />
32 .667 YPB4832 53956<br />
33 .688 YPB4833 53957<br />
34 .708 .188 YPB4834 53958<br />
35 .729 YPB4835 53959<br />
36 .750 YPB4836 53960<br />
37 .771 .55 .25 YPB4837 53961<br />
38 .792 YPB4838 53962<br />
39 .813 YPB4839 53963<br />
40 .833 YPB4840 53964<br />
42 .875 YPB4842 53965<br />
44 .917 YPB4844 53966<br />
45 .938 YPB4845 53967<br />
48 1.000 YPB4848 53968<br />
52 1.083 YPB4852 53969<br />
54 1.125 YPB4854 53970<br />
56 1.168 YPB4856 53971<br />
60 1.250 YPB4860 53972<br />
64 1.333 YPB4864 53973<br />
66 1.375 .250 .61 B YPB4866 53974<br />
72 1.500 YPB4872 53975<br />
80 1.667 YPB4880 53976<br />
84 1.750 YPB4884 53977<br />
96 2.000 YPB4896 53978<br />
100 2.083 YPB48100 53979<br />
108 2.250 YPB48108 53980<br />
120 2.500 YPB48120 53981<br />
38 <strong>Boston</strong> <strong>Gear</strong> 800-825-6544 P-1930-BG 04/10
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