Un-A-Lok® Liner Bushings (UL)

Drill Bushings

Product Information

Un-A-Lok® Liners are similar to HL head liners, except that they incorporate a sturdy locking tab that eliminates the need for a Lockscrew. UL Liners are permanent bushings used to hold SF renewable drill bushings (on the "slip" side only, not the "fixed" side). Although slightly more expensive than a head liner plus a Lockscrew, installation time is dramatically reduced. Note: the "length" listed for an UL bushing refers to its overall length not including locking tab, not its length under the head. Patent no. 3,015,242 and 3,099,079.

Complete part numbers for all standard Un-A-Lok® Liner Bushings are listed in the tables below.

Application Information

Un-A-Lok® Liners are functionally similar to Head Liner Bushings, except that they incorporate a sturdy locking tab that eliminates the need for a Lockscrew, reducing installation time dramatically.

ID Tolerance

Standard Liner ID Tolerance:

3/16 to 5/16" +.0001/+.0004

1/2" +.0002/+.0005

3/4" +.0003/+.0006

1" +.0004/+.0007

OD Tolerance

Standard OD Tolerance:

5/16" +.0016/+.0013

1/2" +.0017/+.0014

3/4 to 1" +.0018/+.0015

1-3/8" +.0022/+.0018

Unground OD Tolerance:

5/16" +.015/+.010

1/2 to 2-1/4" +.020/+.015

To order liner bushings with an unground OD, add "U" on Price & Availability screen:

UL-20-5 Standard liner bushing

UL-20-5U Standard unground liner bushing

Material

MATERIAL	HEAT TREAT	FINISH	DFARS	RoHS
1144 Stressproof Steel	heat treated to achieve Rc 62-64 ID hardness	-	✔	✔

Click here for detailed material and finish specifications.

California residents click here for Prop 65 information.

Other materials are available by special order