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Gun-Drill Liner Bushings (GDL)

Drill Bushings

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Product Information

Gun-Drill Liner Bushings (GDL)

Gun-Drill Bushings are used on gun-drilling machines, such as Eldorado, Drillmation, DeHoff, and Lahr. These bushings are similar to SF renewable bushings, except reversed, with the drill bearing at the bushing's head end, which contacts the workpiece. Gun-Drill Bushings are available in a choice of one-piece construction or the two-piece construction shown here (a liner plus an insert).

The Gun-Drill Liner Bushings shown here are used together with Gun-Drill Inserts. This two-piece system offers maximum economy and flexibility. Only a few liner sizes are required to hold a wide range of replaceable inserts to fit specific gun-drill sizes. Available in 1", 1-3/8", and 1-3/4" OD sizes. Complete part numbers for all standard liner bushings are listed in the tables below.

Example:

GDL-112-28-20 1-3/4" OD liner bushing to fit all inserts with a 5/16" OD

Application Information

ID Tolerance

Standard Liner ID Tolerance:

13/64" +.0014/+.0016

1/4 to 5/16" +.0015/+.0017

1/2" +.0016/+.0018

3/4 to 1" +.0017/+.0019

1-3/8" +.0021/+.0023

OD Tolerance

Standard OD Tolerance:

1" 0/-.0002

1-3/8 to 1-3/4" 0/-.0003

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

Gun-Drill Liner Bushings (GDL)

1" OD

QUANTITY	PART NO.	A ID	B OD	C LENGTH	D	E	F DIA	G	H	J	L	R	LOCK SCREW
	GDL-64-16-13	13/64	1	1	1/8	7/16	1-27/64	3/8	3/16	19/32	35˚	59/64	LS-2
	GDL-64-16-16	1/ 4	1	1	5/32	7/16	1-27/64	3/8	3/16	19/32	35˚	59/64	LS-2
	GDL-64-16-20	5/16	1	1	7/32	7/16	1-27/64	3/8	3/16	19/32	35˚	59/64	LS-2
	GDL-64-16-32	1/ 2	1	1	11/32	7/16	1-27/64	3/8	3/16	19/32	35˚	59/64	LS-2
	GDL-64-16-48	3/ 4	1	1	9/16	7/16	1-27/64	3/8	3/16	19/32	35˚	59/64	LS-2

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1-3/8" OD

QUANTITY	PART NO.	A ID	B OD	C LENGTH	D	E	F DIA	G	H	J	L	R	LOCK SCREW
	GDL-88-22-13	13/64	1-3/8	1-3/8	1/8	7/16	1-51/64	3/8	3/16	25/32	30˚	1-7/64	LS-2
	GDL-88-22-16	1/ 4	1-3/8	1-3/8	5/32	7/16	1-51/64	3/8	3/16	25/32	30˚	1-7/64	LS-2
	GDL-88-22-20	5/16	1-3/8	1-3/8	7/32	7/16	1-51/64	3/8	3/16	25/32	30˚	1-7/64	LS-2
	GDL-88-22-32	1/ 2	1-3/8	1-3/8	11/32	7/16	1-51/64	3/8	3/16	25/32	30˚	1-7/64	LS-2
	GDL-88-22-48	3/ 4	1-3/8	1-3/8	9/16	7/16	1-51/64	3/8	3/16	25/32	30˚	1-7/64	LS-2
	GDL-88-22-64	1	1-3/8	1-3/8	51/64	7/16	1-51/64	3/8	3/16	25/32	30˚	1-7/64	LS-2

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1-3/4" OD

QUANTITY	PART NO.	A ID	B OD	C LENGTH	D	E	F DIA	G	H	J	L	R	LOCK SCREW
	GDL-112-28-13	13/64	1-3/4	1-3/4	1/8	3/4	2-19/64	3/8	3/16	1	30˚	1-25/64	LS-2
	GDL-112-28-16	1/ 4	1-3/4	1-3/4	5/32	3/4	2-19/64	3/8	3/16	1	30˚	1-25/64	LS-2
	GDL-112-28-20	5/16	1-3/4	1-3/4	7/32	3/4	2-19/64	3/8	3/16	1	30˚	1-25/64	LS-2
	GDL-112-28-32	1/ 2	1-3/4	1-3/4	11/32	3/4	2-19/64	3/8	3/16	1	30˚	1-25/64	LS-2
	GDL-112-28-48	3/ 4	1-3/4	1-3/4	9/16	3/4	2-19/64	3/8	3/16	1	30˚	1-25/64	LS-2
	GDL-112-28-64	1	1-3/4	1-3/4	51/64	3/4	2-19/64	3/8	3/16	1	30˚	1-25/64	LS-2
	GDL-112-28-88	1-3/8	1-3/4	1-3/4	1-3/64	3/4	2-19/64	3/8	3/16	1	30˚	1-25/64	LS-2

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Products Related to Gun-Drill Liner Bushings (GDL)

Gun-Drill Insert Bushings (GDI)

Gun-Drill Insert Bushings (GDI)

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