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Gun Drill Bushings
Type GDB

Acme Type GDB Bushings are thru-hardened to 62-64 RC and ground concentric within .0002" T.I.R. The head is undercut and ground square to the inside diameter within .0002" T.I.R. Type GDB Bushings are manufactured from semi-finished inventory for quick delivery.



Description

A
I.D. Range
+.0002 / -.0000

B
O.D. Size

C
Length
(Under Head)

Head Dimensions

Lockscrew

Nominal

Actual

F

J

R

GDB-64-16

3/16 - 25/32
(.1875) (.7812)

1"

1.0000
.9998

1"

1-27/64

19/32

59/64

2A-LS

GDB-64-22

1/4 - 25/32
(.2500) (.7812)

1-3/8

GDB-88-16

3/16 - 1-1/16
(.1875) (1.0625)

1-3/8

1.3750
1.3748

1"

1-51/64

25/32

1-7/64

2A-LS

GDB-88-22

1/4 - 1-1/16
(.2500) (1.0625)

1-3/8




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