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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

  • Single row ball bearing
  • All external surfaces except bore and seals/shields are cadmium plated
  • Available with removable PTFE seals or stainless shields
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K-Series Schematic

K Series Bearings

(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:

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

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