Specification

Item	Value
Type	Airframe bearing, antifriction
Material	Airframe antifriction bearing
Status	Check the current issue of the standard before design use.

Dimensions by size

Dimension, in	-3A	-4A	-5A	-6A	-3	-4	-5	-6
B — bore (+.0000 / -.0005)	.1900	.2500	.3125	.3750	.1900	.2500	.3125	.3750
D — outside diameter (+.0000 / -.0005)	.6250	.7500	.8125	.8750	.7774	.9014	1.250	1.438
W — width of inner ring (+.000 / -.005)	.245	.281	.297	.313	.297	.484	.558	.620
H — width of outer ring (+.000 / -.005)	.303	.219	.234	.250	.270	.335	.375	.469
A — shoulder diameter, inner (approx.)	.253	.321	.381	.453	.290	.390	.561	.607
E — inner ring bore chamfer (+.015 / -.000)	.005	.005	.015	.016	.005	.005	.015	.015
C — outer ring OD chamfer (+.015 / -.000)	.016	.016	.016	.016	.022	.032	.032	.032
Radial limit — Radial limit load, lb	550	900	1000	1120	900	1410	2190	2980
Thrust limit — Thrust limit load, lb	100	200	200	200	200	300	300	400
Rating, Case I — Radial load rating, lb, Case I (avg. life 10,000 complete 90° cycles)	550	900	950	1120	900	1230	2190	2980
Rating, Case II — Radial load rating, lb, Case II (avg. life 10,000 complete 90° cycles)	480	770	815	990	770	1230	1890	2580
Axial play — Axial play, in max	.023	.025	.028	.030	.023	.025	.028	.030

Dimensions in inches, loads in pounds, as tabulated; tolerances in the dimension names.

Dash numbers of the standard, each with its own link.

.19002 part numbers

Part no.	Mfg. P/N (as listed)
MS27645-3A	KSP3L
MS27645-3	KSP3

.25002 part numbers

Part no.	Mfg. P/N (as listed)
MS27645-4A	KSP4A
MS27645-4	KSP4

.31252 part numbers

Part no.	Mfg. P/N (as listed)
MS27645-5A	KSP5A
MS27645-5	KSP5

.37502 part numbers

Part no.	Mfg. P/N (as listed)
MS27645-6A	KSP6A
MS27645-6	KSP6

Part	Meaning
Format	MS27645-<dash>
Example	MS27645-3A — dash 3A

Case I and Case II are the two radial load rating columns of the listing, for an average life of 10,000 complete 90° cycles.
Part numbers of the manufacturer (Mfg. P/N) are given as listed.

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MS27645 — Airframe Bearing, Antifriction, Self-Aligning, Light and Heavy Duty — nominal sizes and part numbers.