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	-4A	-4	-5	-6	-8
B — bore (+.0000 / -.0005)	.2500	.2500	.3125	.3750	.5000
D — outside diameter (+.0000 / -.0005)	.6250	.7500	.8750	1.063	1.438
W — width of inner ring (+.000 / -.005)	.562	.875	.938	1.188	1.500
H — width of outer ring (+.000 / -.005)	.500	.750	.813	1.063	1.375
A — shoulder diameter, inner (approx.)	.338	.372	.466	.570	.709
E — inner ring bore chamfer (+.015 / -.000)	.005	.005	.005	.005	.005
C — outer ring OD chamfer (+.015 / -.000)	.016	.016	.016	.016	.032
Radial limit — Radial limit load, lb	1400	2700	5140	8440	15520
Thrust limit — Thrust limit load, lb	500	900	1600	2600	4700
Rating, Case I — Radial load rating, lb, Case I (avg. life 10,000 complete 90° cycles)	1050	2070	2600	4220	7610
Rating, Case II — Radial load rating, lb, Case II (avg. life 10,000 complete 90° cycles)	960	1850	2320	3740	6520

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

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

Part	Meaning
Format	MS27647-<dash>
Example	MS27647-4A — dash 4A

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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MS27647 — Airframe Bearing, Antifriction, Self-Aligning, Light and Heavy Duty — nominal sizes and part numbers.