39 Pcs/Set HSS Interchangeable Pilot Counterbore Set in Fitted Box, #500S-A000

39 Pcs/Set HSS Interchangeable Pilot Counterbore Set in Fitted Box, #500T-B000

39 Pcs/Set HSS Interchangeable Pilot Counterbore Set, #500T-B000

  • Complete with pilots in fitted case.
  • Each set includes: 13 counterbores and 26 pilots
  • Counterbores: 1/8" to 3/4", 26 pieces
  • Pilots:
  • 1/4", 5/16", 3/8", 7/16", 1/2" and 9/16" with MT1 shanks
  • 5/8", 11/16", 3/4", 13/16", and 7/8" with MT2 shanks
  • 15/16" and 1" with MT3 shanks
  • Solid excellent packing

  • The 13 pcs interchange counterbore and their correspondent pilot chart：

Couterbore Size

Pilot Hole Size

Range of Pilot Sizes

No. of Flute

Shank Taper


1/4"

3/32"

1/8"-3/16"

3

MT1

5/16"

3/32"

1/8"-1/4"

3

MT1

3/8"

5/32"

3/16"-5/16"

3

MT1

7/16"

5/32"

3/16"-3/16"

3

MT1


1/2"

3/16"

1/4"-7/16"

3

MT1


9/16"

3/16"

1/4"-1/2"

3

MT1


5/8"

3/16"

1/4"-9/16"

3

MT2


11/16"

3/16"

1/4"-5/8"

3

MT2


3/4"

1/4"

5/16"-11/16"

3

MT2


13/16"

1/4"

5/16"-3/4"

3

MT2


7/8"

1/4"

5/16"-13/16"

3

MT2


15/16"

1/4"

5/16"-7/8"

3

MT3


1"

5/16"

3/8"-15/16"

3

MT3


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