KP-A Series

KP-A series bearings are single row, radial-type airframe control and aerospace bearings. MKP-A products are precision bearings.

Single Row Radial
Aircraft Control Bearing

Single row ball bearing
Manufactured to AS27641 per AS7949
All external surfaces except bore and stainless steel seal retainers are cadmium plated
Installed with PTFE seals
Pre-lubricated (see grease specifications)

Precision Series tolerances in light blue
When ordering precision parts be sure to add the “M” prefix to the standard part number

(Click on Bearing Part Number to get 2D/3D CAD files from VirtualCAD)
Bearing Part Number
	MS 27641-
	Bore d (in.)
	Outside Diameter D (in.)
	Inner Ring Width B (in.)
	Outer Ring Width C (in.)
	Inner Land Diameter d₁
	Inner Ring Chamfer c₁
	Outer Ring Chamfer c
	Radial Limit Load Rating
	Thrust Limit Load Rating
+.0000 -.0005
	+.0000 -.0003
	+.0000 -.0005
	+.0000 -.0004
	+.000 -.005
	+.0000 -.0025
	+.000 -.005
	+.000 -.005
	Approx.
	+.015 -.000
	+.015 -.000
	(lbs.) †
	(lbs.) †
KP3A
	-3
	0.1900
	0.6250
	0.297
	0.234
	0.270
	0.005
	0.016
	1560
	700
KP4A
	-4
	0.2500
	0.7500
	0.281
	0.219
	0.349
	0.005
	0.016
	1880
	900
KP5A
	-5
	0.3125
	0.8125
	0.297
	0.234
	0.428
	0.015
	0.016
	2190
	1000
KP6A
	-6
	0.3750
	0.8750
	0.313
	0.250
	0.505
	0.015
	0.016
	2500
	1100
KP8A
	-8
	0.5000
	1.1250
	0.375
	0.313
	0.635
	0.015
	0.016
	3910
	1700
KP10A
	-10
	0.6250
	1.3750
	0.406
	0.344
	0.760
	0.015
	0.032
	6700
	3000
KP12A
	-12
	0.7500
	1.6250
	0.437
	0.375
	0.955
	0.015
	0.032
	8790
	3900
KP16A
	-16
	1.0000
	2.0000
	0.500
	0.438
	1.262
	0.015
	0.032
	11900
	5200
KP20A
	-20
	1.2500
	2.2500
	0.500
	0.438
	1.512
	0.015
	0.032
	13800
	6100

wdt_ID	Part Number	MS 27641-	Bore d (in.)<br>+.0000 to -.0005<br>+.0000 to -.0003	Outside Diameter D (in.)<br>+.0000 to -.0005<br>+.0000 to -.0004	Inner Ring Width B (in.)<br>+.000 to -.005<br>+.0000 to -.0025	Outer Ring Width C (in.)<br>+.000 to -.005<br>+.000 to -.005	Inner Land<br>Diameter<br>d1 (in.)<br>Approx.	Inner Ring Chamfer<br>c1 (in.)	Outer Ring Chamfer<br>c (in.)	Radial Limit Load Rating (lbs.) †	Thrust Limit Load Rating (lbs.) †
1	KP3A	-3	0.1900	0.6250	0.297	0.234	0.270	0.005	0.016	1560	700
2	KP4A	-4	0.2500	0.7500	0.281	0.219	0.349	0.005	0.016	1880	900
3	KP5A	-5	0.3125	0.8125	0.297	0.234	0.428	0.015	0.016	2190	1000
4	KP6A	-6	0.3750	0.8750	0.313	0.250	0.505	0.015	0.016	2500	1100
5	KP8A	-8	0.5000	1.1250	0.375	0.313	0.635	0.015	0.016	3910	1700
6	KP10A	-10	0.6250	1.3750	0.406	0.344	0.760	0.015	0.032	6700	3000
7	KP12A	-12	0.7500	1.6250	0.437	0.375	0.955	0.015	0.032	8790	3900
8	KP16A	-16	1.0000	2.0000	0.500	0.438	1.262	0.015	0.032	11900	5200
9	KP20A	-20	1.2500	2.2500	0.500	0.438	1.512	0.015	0.032	13800	6100
	Part Number	MS 27641-	Bore d (in.)<br>+.0000 to -.0005<br>+.0000 to -.0003	Outside Diameter D (in.)<br>+.0000 to -.0005<br>+.0000 to -.0004	Inner Ring Width B (in.)<br>+.000 to -.005<br>+.0000 to -.0025	Outer Ring Width C (in.)<br>+.000 to -.005<br>+.000 to -.005	Inner Land<br>Diameter<br>d1 (in.)<br>Approx.	Inner Ring Chamfer<br>c1 (in.)	Outer Ring Chamfer<br>c (in.)	Radial Limit Load Rating (lbs.) †	Thrust Limit Load Rating (lbs.) †

Check with Schatz Bearing Corporation for current approval status.
Contact Schatz Bearing Corporation’s Engineering Department for further technical information.
Check with Schatz Bearing Corporation’s Sales Department for price and availability.