10. COMBINED DRILLS & COUNTER SINKS 
(AS PER ANSI B94.11M)

(A)   PLAIN TYPE

Art No For
Size
Body Dia.
Drill Dia.
Overall Length
Description

60°

82°

90°

Inch Inch Inch
1961

-

-

00

1/8”

.025”

1-1/8”

  • Manufactured from High Speed Steel.

  •  60°, 82° or 90° Angles of Plain type are available.

  • Countersink Angle 60° fits all Standard Centers.

  • The Edges of the 60° Center Hole is protected by 120° Chamfer on the Bell Type.

1962

-

-

0

1/8”

1/32”

1-1/8”

1963 1974 1982

1

1/8”

3/64”

1-1/4”

1964 1975 1983

2

3/16”

5/64”

1-7/8”

1965 1976 1984

3

1/4”

7/64”

2”

1966 1977 1985

4

5/16”

1/8”

2-1/8”

1967   -   -

4-1/2

3/8”

9/64”

2-1/2”

1968 1978 1986

5

7/16”

3/16”

2-3/4”

1969 1979 1987

6

1/2”

7/32”

3”

1970 1980 1988

7

5/8”

1/4”

3-1/4”

1971 1981 1989

8

3/4”

5/16”

3-1/2”

1972

-

-

9

7/8”

11/32”

3-5/8”

1973

-

-

10

1”

3/8”

3-3/4”


(B) BELL TYPE 60°

Art No.

Size

Body Dia.

Drill Dia.

Bell Dia.

Overall Length 

1990

11

1/8”

3/64”

.100”

1-1/4”

1991

12

3/16”

1/16”

.150”

1-7/8”

1992

13

1/4”

3/32”

.200”

2”

1993

14

5/16”

7/64”

.250”

2-1/8”

1994

15

7/16

5/32”

.350”

2-3/4”

1995

16

1/2”

3/16”

.400”

3”

1996

17

5/8”

7/32”

.500”

3-1/4”

1997

18

3/4”

1/4”

.600”

3-1/2”

SET OF BELL TYPE

Art No..

Range

No. of Pcs.

1997-A

# 11 TO # 15

5