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Gun Drill Bushings
Liners —Type GDL

Acme Gun Drill Liners are designed to be used with the replaceable inserts indicated in the table below. All type GDL Bushings are ground concentric within .0002" T.I.R. The heads are undercut and ground square with outside diameters so the liner will seat flat against the chip box.



Part Number

Description

A1
+.0002
-.0000

A2
±.005

B
O.D. Size

D

Head Dimensions

Lockscrew

Insert Used

Nominal

Actual

F

J

R

A51210

GDL-64-16

.2045

.125

1"

1.0000
.9998

7/16

1-27/64

19/32

59/64

2A-LS

GDI-13-8

A51212

.2515

.156

GDI-16-8

A51214

.3140

.218

GDI-20-8

A51216

.5016

.406

GDI-32-8

A51218

.7517

.625

GDI-48-8

A51240

GDL-88-16

.2045

.125

1-3/8

1.3750
1.3748

7/16

1-51/64

25/32

1-7/64

2A-LS

GDI-13-8

A51242

.2515

.156

GDI-16-8

A51244

.3140

.218

GDI-20-8

A51246

.5016

.406

GDI-32-8

A51248

.7517

.625

GDI-48-8

A51250

1.0017

.875

11/16

1-51/64

25/32

1-7/64

2A-LS

GDI-64-12




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