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 />
24 and 20 Diametral Pitch (Delrin, Brass, Steel & Cast Iron)<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 />
Brass, Steel and Cast Iron<br />
BORE All ± .0005<br />
Delrin with Brass Inserts<br />
BORE All + .001 – .000<br />
REFERENCE PAGES<br />
HUB<br />
PROJ.<br />
BORE<br />
Alterations — 314<br />
Horsepower Ratings — 58<br />
Lubrication — 314<br />
Materials — 315<br />
Selection Procedure — 49<br />
OVERALL<br />
LENGTH<br />
†YPB gears have one setscrew (#8-32), no keyway.<br />
*5/16" bore have #35 (.110) drilled hole<br />
through one wall, no keyway.<br />
‡3/8" bore have one setscrew.<br />
No keyway.<br />
1/2" bore and larger have standard<br />
keyway at 90° to setscrew.<br />
See Page 315.<br />
HUB<br />
DIA.<br />
24 D.P. 20 D.P.<br />
ALL DIMENSIONS IN INCHES<br />
ORDER BY CATALOG NUMBER OR ITEM CODE<br />
Style Without Keyway With Keyway<br />
No. Hub See or Setscrew and Setscrew †<br />
of Pitch Page Catalog Item Catalog Item<br />
Teeth Dia. Bore Dia. Proj. 315 Number Code Number Code<br />
24<br />
Face = .250"<br />
Outside Dia. = Pitch Dia. + .083"<br />
DIAMETRAL PITCH<br />
Overall Length = .250" + Hub Proj.<br />
MOLDED DELRIN WITH BRASS INSERTS<br />
44 1.833 YPB2444 54088 – –<br />
45 1.875 YPB2445 54089 – –<br />
48 2.000 YPB2448 54090 – –<br />
50<br />
52<br />
2.083<br />
2.166<br />
.3125 .67 .31 B<br />
YPB2450 54091<br />
YPB2452 54092<br />
–<br />
–<br />
–<br />
–<br />
54 2.250 YPB2454 54093 – –<br />
56 2.333 YPB2456 54094 – –<br />
60 2.500 YPB2460 54095 – –<br />
BRASS<br />
12 .500 .38 Y2412 09372 – –<br />
15<br />
18<br />
.625<br />
.750<br />
.1875<br />
.50<br />
.54<br />
.25<br />
Y2415<br />
Y2418<br />
09374<br />
09376<br />
–<br />
–<br />
–<br />
–<br />
21 .875 .60<br />
Y2421 09378 – –<br />
24 1.000 .66<br />
A<br />
Y2424 09380 – –<br />
27<br />
30<br />
1.125<br />
1.250<br />
.250<br />
.73<br />
.73<br />
.25<br />
Y2427<br />
Y2430<br />
09382<br />
09384<br />
–<br />
–<br />
–<br />
–<br />
36 1.500 .79 Y2436 09386 – –<br />
42 1.750 .86 .25 Y2442 09388 – –<br />
48<br />
54<br />
2.000<br />
2.250<br />
.3125<br />
.92<br />
.88 .31<br />
Y2448<br />
Y2454<br />
09390<br />
09392<br />
–<br />
–<br />
–<br />
–<br />
60 2.500 .88 Y2460 09394 – –<br />
72 3.000 Y2472 09396 – –<br />
84 3.500 .31 C Y2484 09398 – –<br />
96 4.000 .375 1.00 Y2496 09400 – –<br />
120<br />
144<br />
5.000<br />
6.000<br />
.38<br />
Y24120<br />
Y24144<br />
09402<br />
09404<br />
–<br />
–<br />
–<br />
–<br />
20<br />
Face = .500"<br />
Outside Dia. = Pitch Dia. + .100"<br />
DIAMETRAL PITCH<br />
Overall Length = .500" + Hub Proj.<br />
STEEL<br />
12<br />
14<br />
.600<br />
.700<br />
.3125<br />
.46<br />
.56<br />
.44<br />
YA12<br />
YA14<br />
09892<br />
09894<br />
YA12-5/16 *<br />
YA14-5/16 * 46128<br />
46129<br />
15 .750 .60 YA15 09896 YA15-3/8 ‡ 46130<br />
16 .800 .375 .66 .44 YA16 09898 YA16-3/8 ‡ 46131<br />
18 .900 .74 YA18 09900 YA18-3/8 ‡ 46132<br />
20 1.000 .84 YA20 09902 YA20-1/2 46133<br />
24<br />
25<br />
1.200<br />
1.250 .500<br />
.92<br />
.97<br />
.44<br />
A<br />
YA24<br />
YA25<br />
09914<br />
09904<br />
YA24-1/2<br />
YA25-1/2<br />
46134<br />
46135<br />
30 1.500 1.22 YA30 09906 YA30-1/2 46136<br />
35 1.750 1.47 .50 YA35 09908 YA35-1/2 46137<br />
.500 YA40 09910 YA40-1/2 46138<br />
40 2.000 .625 1.72 .50 – – YA40-5/8 46139<br />
.750 – – YA40-3/4 46140<br />
45 2.250 1.97 YA45 09912 – –<br />
50<br />
60<br />
2.500<br />
3.000<br />
.500<br />
1.62<br />
2.12<br />
.50<br />
YA50A<br />
YA60A<br />
10548<br />
10550<br />
–<br />
–<br />
–<br />
–<br />
70 3.500 2.38 YA70A 10552 – –<br />
CAST IRON<br />
80 4.000 C YA80 10554 – –<br />
84 4.200 .625 1.38 .62 B YA84 10556 – –<br />
90 4.500<br />
YA90 10558 – –<br />
100 5.000<br />
C<br />
YA100 10560 – –<br />
120 6.000<br />
.625 1.50 .62<br />
YA120 10562 – –<br />
140 7.000 YA140 10564 – –<br />
160 8.000 D YA160 10566 – –<br />
180<br />
200<br />
9.000<br />
10.000<br />
.625 1.75 .75<br />
YA180<br />
YA200<br />
10568<br />
10570<br />
–<br />
–<br />
–<br />
–<br />
42 <strong>Boston</strong> <strong>Gear</strong> 800-825-6544 P-1930-BG 04/10
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