1、flIL-B-913/12 999990b 18115182 8711 MILITARY SPECIFICATI BEARING, BALL, A ROTATING COMPO NON-SEPARAB CORROSION R I METRIC I MIL-B-913/12 5 March 1993 SHEET JNULAR, FOR INSTRUMENTS AND PRECISION JENTS, ANGULAR CONTACT, UNFLANGED, LE AND COUNTERBORED OUTER RING, ZSISTANT STEEL, ABEC 5P (METRIC) This s
2、pecification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and the issue of the following specification listed in that issue of the Department of Defense Index of
3、 Specifications and Standards (DODISS) specified in the solicitation: MIL-B-913. AMSC N/A J?IST.-ION STA=-. is unlimited. Approved for public release FSC 3110 distribution Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-9b3/L2 = 0b L45L3 700 MI
4、L-B-913/12 REQUIREMENTS: 1. Desiun. All bearings described by this specification sheet shall be angular contact instrument bearings with an unflanged, non-separable and counterbored outer ring configuration. 2. Material. The ball and ring material for these bearings shall be corrosion resistant stee
5、l 440C (UNS S44004) conforming to QQ-S-763. 3. Tolerance class_. The tolerance class shall be in accordance with the MEC 7P tolerance tables of ANSI/AFBMA Standard 12.1. This tolerance class shall apply to all bearing sizes listed in Table I of this specification sheet. 4. Boundarv dimensions. The b
6、oundary dimensions shall be as specified by the size code in Table I. 5. Retainer. The retainer shall be as specified by the part number designator (PN DES) in Table II. 6. Closures. Angular contact bearings shall be supplied with no closures. 7. Radial internal clearance or contact anule. The radia
7、l internal clearance or contact angle shall be as specified by the part number designator in Table IV. 8. Calibration. Calibration shall be as specified by the part number designator in Table V. 9. Performance Test. The performance test shall be as specified by the part number designator in Table II
8、I. 10. Lubrication. 10.1 Lubricant. The lubricant shall be in accordance with the specification specified by the part number designator in Table VI. 10.2 Lubricant amount. The amount of lubricant shall be as specified by the part number designator in Table VII. 10.3. Barrier coatinq. Barrier coating
9、 shall be applied to bearings as specified by the part nurribei- clesigiiator iii Table VI. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-913/12 W 0b 1845184 b47 W 11. Part number. The part number consists of the following: Prefix letter M;
10、 general specification number; number of this specification sheet; and alpha numeric codes for size, retainer, performance test, radial internal clearance or contact angle, calibration, lubrication, and lubricant amount. EXAMPLE: 913/ 1 -Lubricant -alibration Performance test Retainer Size code Spec
11、ification sheet number M913/12BA724NPP indicates - Bore 2.0 rai; outside diameter 5.0 mm; width 1.5 mm; radius 0.08 mm; retainer phenolic laminate; performance test, starting torque; contact angle, greater than 14 but less than 20; no calibration; lubricant, preservative; lubricant amount, in accord
12、ance with MIL-P-197. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-713/12 W 9999906 1845185 583 = TABLE I. SIZE CODE AA BA BB CA CB DA DB EA EB EC FA FB FC GA GB HA HB HC JA JB KA KB LA MIL-B-913/12 Boundary dimensions (millimeters). BORE d
13、 1.5 2.0 2.0 2.5 2.5 3.0 3.0 4.0 4.0 4.0 5.0 5.0 5.0 6.0 6.0 7.0 7.0 7.0 8.0 8.0 9.0 9.0 10.0 OD D 5.0 5.0 6.0 6.0 7.0 7.0 10.0 9.0 13.0 16.0 11.0 16.0 19.0 13.0 19.0 14.0 19.0 22.0 19.0 22.0 20.0 26.0 26.0 WIDTH C 2.0 1.5 2.3 1.8 2.5 2.0 4.0 2.5 5.0 5.0 3.0 5.0 6.0 3.5 6.0 3.5 6.0 7.0 6.0 7.0 6.0 8
14、.0 8.0 RADIUS I I/ 2/ 0.15 0.08 0.08 0.08 0.15 0.10 0.15 0.10 0.20 0.30 0.15 0.30 0.30 0.15 0.30 0.15 0.30 0.30 0.30 0.30 0.30 0.30 0.30 - i/ Maximum shaft or housing fillet radius 2J Narrow face of rings shall clear a maximum that bearings corners will clear. fillet radius of one-half the value lis
15、ted. This value shall be a minimum of 0.05. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-B-qL3/12 999990b 1845LBb 4LT 6 7 8 9 PTFE TOROIDS 1/ PHENOLIC LAMINATE 2/ VACUUM IMPREGNATED PHENOLIC u NON-POROUS, NON-METALLIC CROWN PN DES 1 2 TYPE M
16、ANUFACTURERS STANDARD STARTING TORQUE a/ MIL-B-913/12 TABLE II. Retainer. I PN DES I TYPE I PN DES RANGES I l l I i l I :o 2pm to 7pm (micrometers) 5pm to 12pm 14O OR LESS l/ GREATER THAN 14O BUT LESS THAN 20 u 12pm to 20pm GREATER THAN ?Oo U 20pm to 28pm U Angular contact bearing designations only.
17、 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-913/l12 = 0b l1845L87 35b MIL-B-913/12 TABLE V. Calibration of bore and outside diameter (micrometers). PN DES N A B C D E F G H BORE INCREMENTS NO CALIBRATION NO CALIBRATION NO CALIBRATION 2.5
18、0 2.50 2.50 1.25 1.25 1.25 OD INCREMENTS NO CALIBRATION 2.50 1.25 NO CALIBRATION 2.50 1.25 NO CALIBRATION 2.50 1.25 TABLE VI. Lubricant. PN DES P A B C D E F G H J K SPECIFICATION PRESERVATIVE L/ MIL-L-6085 MIL-L-6085 2/ MIL-L-81846 MIL-L-81846 2/ MIL-G-23827 MIL-G-81322 MIL-G-81937 MIL-G-83261 MIL-
19、S-81087 MIL-S-81087 2/ - i/ PN DES “P“ shall be used only with PN DES “P“ in TABLE VII. 2/ With barrier coat. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-913/12 999990b 1845188 292 MIL-B-913/12 TABLE VII. Lubricant amount. I PN DES I QUAN
20、TITY PRESERVATIVE AMOUNT AS REQUIRED BY MIL-P-197 MANUFACTURERS STANDARD I/ OIL PER TABLE II of MIL-B-913 15% GREASE PER TABLE II of MIL-B-913 25% GREASE PER TABLE II of MIL-B-913 35% GREASE PER TABLE II of MIL-B-913 45% GREASE PER TABLE II of MIL-B-913 I/ Grease, fill to minimum 25%, maximum 40% of
21、 bearing void. Oil, immerse and then allow excess to drip off. The standard quantity of oil varies with each bearing size. Custodians: Army - AT Navy - AS Air Force - 99 Review activities: Navy - SH DLA - IS Preparing activity: Navy - AS Agent: DLS - IS (Project 3110-0813-12) User activities: Navy - MC Air Force - 84 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
