K Series

K series bearings are single-row aerospace bearings for airframe control. PTFE seals or stainless steel shields available.

Single Row Radial
Aircraft Control Bearing

(Click on Bearing Part Number to get 2D/3D CAD files from VirtualCAD)
Bearing Part Number
	Bore d (in.)
	Outside Diameter D (in.)
	Inner Ring Width B (in.)
	Outer Ring Width C (in.)
	Inner Land Diameter d₁
	Outside Diameter Radius Ref. R
	Inner Ring Chamfer c₁
	Outer Outside Diameter Corner Ref. c
	Max. Safe Working Load Radial

	+.000 -.010
	+.000 -.005
	+.000 -.005
	Approx.
	Maximum
	+.015 -.000
	Maximum
	(lbs.) †
K3L2
	0.1900
	0.687
	0.245
	0.203
	0.275
	0.187
	0.005
	0.020
	200
K3L3
	0.1900
	0.635*
	0.245
	0.203
	0.275
	0.550
	0.005
	0.020
	200
K3LR48
	0.1900
	0.687
	0.245
	0.203
	0.275
	3.015
	0.005
	0.020
	200
KP3AR11-2
	0.1900
	0.718**
	0.297
	0.265
	0.297
	0.359
	0.005
	0.015
	300
KP4AR13
	0.2500
	0.800
	0.281
	0.219
	0.375
	0.812
	0.005
	0.015
	400
KP4AR48
	0.2500
	0.800
	0.281
	0.219
	0.375
	3.015
	0.005
	0.015
	400
KP4R16
	0.2500
	0.901
	0.484
	0.335
	0.390
	1.000
	0.005
	0.015
	400
KP4R16-2
	0.2500
	1.000
	0.390
	0.335
	0.390
	1.000
	0.005
	0.015
	500
KP4R16-3
	0.2500
	0.901
	0.390
	0.335
	0.390
	1.000
	0.005
	0.015
	400
KP4R21-2
	0.2500
	1.312
	0.376
	0.281
	0.616
	1.312
	0.005
	0.015
	500
KP4R25-2
	0.2500
	1.656
	0.376
	0.315
	0.616
	1.658
	0.005
	0.015
	500
K8AR4
	0.5000
	1.250
	0.344
	0.375
	0.610
	0.252
	0.016
	0.015
	500

wdt_ID	Part Number	Bore d (in.)	Outside Diameter D (in.)<br>+.000 to -.010	Inner Ring Width B (in.)<br>+.000 to -.005	Outer Ring Width C (in.)<br>+.000 to -.005	Inner Land Diameter d1 (in.)<br>Approx.	Outside Diameter Radius Ref.<br>R (in.)<br>Maximum	Inner Ring Chamfer<br>c1 (in.)	Outer Outside Diameter Corner Ref.<br>c (in.)<br>Maximum	Max. Safe Working Load Radial (lbs)
1	K3L2	0.1900	0.687	0.245	0.203	0.275	0.005	0.187	0.020	200
2	K3L3	0.1900	0.635*	0.245	0.203	0.275	0.005	0.550	0.020	200
3	K3LR48	0.1900	0.687	0.245	0.203	0.275	0.005	3.015	0.020	200
4	KP3AR11-2	0.1900	0.718**	0.297	0.265	0.297	0.005	0.359	0.015	300
5	KP4AR13	0.2500	0.800	0.281	0.219	0.375	0.005	0.812	0.015	400
6	KP4AR48	0.2500	0.800	0.281	0.219	0.375	0.005	3.015	0.015	400
7	KP4R16	0.2500	0.901	0.484	0.335	0.390	0.005	1.000	0.015	400
8	KP4R16-2	0.2500	1.000	0.390	0.335	0.390	0.005	1.000	0.015	500
9	KP4R16-3	0.2500	0.901	0.390	0.335	0.390	0.005	1.000	0.015	400
10	KP4R21-2	0.2500	1.312	0.376	0.281	0.616	0.005	1.312	0.015	500
11	KP4R25-2	0.2500	1.656	0.376	0.315	0.616	0.005	1.658	0.015	500
12	K8AR4	0.5000	1.250	0.344	0.375	0.610	0.016	0.252	0.015	500
	Part Number	Bore d (in.)	Outside Diameter D (in.)<br>+.000 to -.010	Inner Ring Width B (in.)<br>+.000 to -.005	Outer Ring Width C (in.)<br>+.000 to -.005	Inner Land Diameter d1 (in.)<br>Approx.	Outside Diameter Radius Ref.<br>R (in.)<br>Maximum	Inner Ring Chamfer<br>c1 (in.)	Outer Outside Diameter Corner Ref.<br>c (in.)<br>Maximum	Max. Safe Working Load Radial (lbs)

† Radial load to obtain 100,000 ft. peripheral travel life.

* O.D. tolerances +.000 inch/-.003 inch.
** Denotes spherical diameter.

Notes:

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.