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Spur Gears - Norfolk Bearings and Supply Company, Inc.

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F<br />

BOST-BRONZ Oil-Impregnated Sintered Bronze <strong>Bearings</strong><br />

Plain Cylindrical <strong>Bearings</strong><br />

B A<br />

STANDARD TOLERANCES<br />

Dimensions Tolerance<br />

A<br />

1/8 – 1 1/2<br />

1 3/4 – 2 1/2<br />

+.000, – .001<br />

+.000, – .0015<br />

B 2 3/4 - 3 1/2 +.000,– .002<br />

1/8 – 1-1/2 ± .005<br />

C 1 3/4 – 3 ± .0075<br />

4 ± .010<br />

CONCENTRICITY<br />

Dimensions Tolerance<br />

1/8 – 1 1/2 .003<br />

A 1 5/8 – 3 .004<br />

3 1/4 – 3 1/2 .005<br />

Prices on unlisted sizes <strong>and</strong> other Boston<br />

Gear powder metal parts provided on request.<br />

C<br />

ALL DIMENSIONS IN INCHES<br />

ORDER BY CATALOG NUMBER OR ITEM CODE<br />

A B C<br />

Catalog<br />

Number<br />

Item<br />

Code<br />

1/8<br />

.127<br />

1/4<br />

.252<br />

5/16<br />

.315<br />

1/4<br />

.252<br />

1/8<br />

1/4<br />

3/8<br />

1/2<br />

1/8<br />

1/4<br />

3/8<br />

1/2<br />

5/8<br />

1/4<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

B24-1<br />

B24-2<br />

B24-3<br />

B24-4<br />

B25-1<br />

B25-2<br />

B25-3<br />

B25-4<br />

B25-5<br />

B34-2<br />

B34-3<br />

B34-4<br />

B34-5<br />

B34-6<br />

34504<br />

34506<br />

34508<br />

34510<br />

34512<br />

34514<br />

34516<br />

34518<br />

34520<br />

34522<br />

34524<br />

34526<br />

34528<br />

34530<br />

3/16<br />

.189 5/16<br />

.314<br />

3/8<br />

.377<br />

5/16<br />

.315<br />

1/4<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

1/4<br />

3/8<br />

1/2<br />

3/4<br />

1/4<br />

5/16<br />

B35-2<br />

B35-3<br />

B35-4<br />

B35-5<br />

B35-6<br />

B36-3<br />

B36-4<br />

B36-5<br />

B36-6<br />

B45-2<br />

B45-3<br />

B45-4<br />

B45-6<br />

B46-2<br />

B46-2<br />

34532<br />

34534<br />

34536<br />

34538<br />

34540<br />

13561<br />

13563<br />

13565<br />

13567<br />

13569<br />

13571<br />

13573<br />

13575<br />

34542<br />

1/2<br />

A B C<br />

Catalog<br />

Number<br />

Item<br />

Code<br />

3/8<br />

.377<br />

9/16<br />

.5645<br />

5/8<br />

.627<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1-14<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1-1/4<br />

B69-3<br />

B69-4<br />

B69-5<br />

B69-6<br />

B69-7<br />

B69-8<br />

B69-10<br />

B610-3<br />

B610-4<br />

B610-5<br />

B610-6<br />

B610-7<br />

B610-8<br />

B610-10<br />

34648<br />

34650<br />

34652<br />

34654<br />

34656<br />

34658<br />

34660<br />

34676<br />

34678<br />

34680<br />

34682<br />

34684<br />

34686<br />

34688<br />

1/4<br />

.252<br />

5/16<br />

.314<br />

3/8<br />

.377<br />

3/8<br />

.377<br />

7/16<br />

.439<br />

1/2<br />

.502<br />

3/8<br />

.377<br />

7/16<br />

.439<br />

1/2<br />

.502<br />

7/16<br />

.440<br />

1/2<br />

.502<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1-1/4<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1-1/4<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1/4<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1-1/4<br />

1-3/8<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1-1/4<br />

1-1/2<br />

1-3/4<br />

1/2<br />

5/8<br />

3/4<br />

1<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1-1/4<br />

B46-3<br />

B46-4<br />

B46-5<br />

B46-6<br />

B46-7<br />

B46-8<br />

B46-10<br />

B47-3<br />

B47-4<br />

B47-5<br />

B47-6<br />

B47-7<br />

B47-8<br />

B48-3<br />

B48-4<br />

B48-5<br />

B48-6<br />

B48-7<br />

B48-8<br />

B48-10<br />

B56-3<br />

B56-4<br />

B56-5<br />

B56-6<br />

B56-7<br />

B56-8<br />

B57-2<br />

B57-3<br />

B57-4<br />

B57-5<br />

B57-6<br />

B57-7<br />

B57-8<br />

B57-10<br />

B57-11<br />

B58-3<br />

B58-4<br />

B58-5<br />

B58-6<br />

B58-7<br />

B58-8<br />

B58-10<br />

B58-12<br />

B58-14<br />

B67-4<br />

B67-5<br />

B67-6<br />

B67-8<br />

B68-3<br />

B68-4<br />

B68-5<br />

B68-6<br />

B68-7<br />

B68-8<br />

B68-10<br />

34544<br />

34546<br />

34548<br />

34550<br />

34552<br />

34554<br />

34556<br />

34558<br />

34560<br />

34562<br />

34564<br />

34566<br />

34568<br />

34570<br />

34572<br />

34574<br />

34576<br />

34578<br />

34580<br />

34582<br />

34584<br />

34586<br />

34588<br />

34590<br />

34592<br />

34594<br />

34596<br />

34598<br />

34600<br />

34602<br />

34604<br />

34606<br />

34608<br />

34610<br />

34612<br />

34614<br />

34616<br />

34618<br />

34620<br />

34622<br />

34624<br />

34626<br />

34628<br />

34630<br />

34632<br />

13577<br />

13579<br />

13581<br />

13583<br />

34634<br />

34636<br />

34638<br />

34640<br />

34642<br />

34644<br />

34646<br />

7/16<br />

.439<br />

1/2<br />

.503<br />

9/16<br />

.565<br />

3/4<br />

.753<br />

9/16<br />

.5645<br />

5/8<br />

.628<br />

11/16<br />

.690<br />

5/8<br />

.628<br />

11/16<br />

.690<br />

3/4<br />

.753<br />

13/16<br />

.815<br />

7/8<br />

.878<br />

1<br />

1.004<br />

11/16<br />

.690<br />

3/8<br />

1/2<br />

3/4<br />

1<br />

1-1/4<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1-1/4<br />

3/8<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1-1/4<br />

1/2<br />

1<br />

1-1/2<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1-1/8<br />

1-1/4<br />

1-1/2<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1-1/8<br />

1-1/4<br />

1-1/2<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1-1/8<br />

1-1/4<br />

1-1/2<br />

1-3/4<br />

2<br />

1/2<br />

3/4<br />

1<br />

1-1/2<br />

1/2<br />

5/8<br />

3/4<br />

7/8<br />

1<br />

1-1/4<br />

1-1/2<br />

3/4<br />

1<br />

1-1/2<br />

2<br />

1/2<br />

3/4<br />

1<br />

1-1/2<br />

B612-3<br />

B612-4<br />

B612-6<br />

B612-8<br />

B612-10<br />

B79-3<br />

B79-4<br />

B79-5<br />

B79-6<br />

B79-7<br />

B79-8<br />

B79-10<br />

B710-3<br />

B710-4<br />

B710-5<br />

B710-6<br />

B710-7<br />

B710-8<br />

B710-10<br />

B711-4<br />

B711-8<br />

B711-12<br />

B810-4<br />

B810-5<br />

B810-6<br />

B810-7<br />

B810-8<br />

B810-9<br />

B810-10<br />

B810-12<br />

B811-4<br />

B811-5<br />

B811-6<br />

B811-7<br />

B811-8<br />

B811-9<br />

B811-10<br />

B811-12<br />

B812-4<br />

B812-5<br />

B812-6<br />

B812-7<br />

B812-8<br />

B812-9<br />

B812-10<br />

B812-12<br />

B812-14<br />

B812-16<br />

B813-4<br />

B813-6<br />

B813-8<br />

B813-12<br />

B814-4<br />

B814-5<br />

B814-6<br />

B814-7<br />

B814-8<br />

B814-10<br />

B814-12<br />

B816-6<br />

B816-8<br />

B816-12<br />

B816-16<br />

B911-4<br />

B911-6<br />

B911-8<br />

B911-12<br />

34690<br />

34692<br />

34694<br />

34696<br />

34698<br />

34662<br />

34664<br />

34666<br />

34668<br />

34670<br />

34672<br />

34674<br />

34700<br />

34702<br />

34704<br />

34706<br />

34708<br />

34710<br />

34712<br />

34714<br />

34716<br />

34718<br />

34720<br />

34722<br />

34724<br />

34726<br />

34728<br />

34730<br />

34732<br />

34734<br />

34736<br />

34738<br />

34740<br />

34742<br />

34744<br />

34746<br />

34748<br />

34750<br />

34752<br />

34754<br />

34756<br />

34758<br />

34760<br />

34762<br />

34764<br />

34766<br />

34768<br />

34770<br />

34772<br />

34774<br />

34776<br />

34778<br />

34780<br />

34782<br />

34784<br />

34786<br />

34788<br />

34790<br />

34792<br />

13585<br />

13587<br />

13589<br />

13591<br />

34794<br />

34796<br />

34798<br />

34800<br />

On A <strong>and</strong> B dimensions, tolerances apply to actual (decimal) dimensions.<br />

138 Boston Gear 800-825-6544 P-1930-BG 04/10

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