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About Counterbores
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Create flat-bottomed holes, so your screw heads sit flush, recessed, or slightly raised.
Changeable-Pilot Counterbores
 |
Shown with Pilot (Sold Separately) |
A popular choice when counterboring for nonstandard screw sizes, this tool creates counterbored holes for screws of various thread diameters. Attach a pilot (sold separately) that matches the diameter of your pilot hole. The pilot centers the counterbore and prevents wobbling to create an accurate recess for the screw head on the first try.
High-Speed Steel
Shank | Uncoated | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Body Dia. | Overall Lg. | For Pilot Shank Dia. | Dia. | Type | No. of Flutes | Mfr. | Each | |||
| 3/16" | 3" | 3/32" | 15/64" | Round | 3 | Cleveland | 3015A11 | 0000000 | ||
| 7/32" | 3" | 3/32" | 15/64" | Round | 3 | Cleveland | 3015A12 | 000000 | ||
| 1/4" | 2 3/8" | 3/32" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A11 | 00000 | ||
| 1/4" | 3 13/16" | 3/32" | 15/64" | Round | 3 | F&D Tool | 3015A13 | 00000 | ||
| 9/32" | 2 3/8" | 3/32" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A12 | 00000 | ||
| 9/32" | 3 13/16" | 3/32" | 17/64" | Round | 3 | F&D Tool | 3015A14 | 00000 | ||
| 5/16" | 2 3/8" | 3/32" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A13 | 00000 | ||
| 5/16" | 3 13/16" | 3/32" | 19/64" | Round | 3 | F&D Tool | 3015A15 | 00000 | ||
| 11/32" | 2 3/8" | 3/32" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A14 | 00000 | ||
| 11/32" | 3 13/16" | 3/32" | 5/16" | Round | 3 | F&D Tool | 3015A16 | 00000 | ||
| 3/8" | 2 3/8" | 3/32" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A15 | 00000 | ||
| 3/8" | 4 1/16" | 5/32" | 5/16" | Round | 3 | F&D Tool | 3015A17 | 00000 | ||
| 13/32" | 2 13/16" | 1/8" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A16 | 00000 | ||
| 13/32" | 4 1/16" | 5/32" | 3/8" | Round | 3 | F&D Tool | 3015A18 | 00000 | ||
| 7/16" | 2 13/16" | 1/8" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A17 | 00000 | ||
| 7/16" | 4 1/16" | 5/32" | 3/8" | Round | 3 | F&D Tool | 3015A19 | 00000 | ||
| 15/32" | 2 13/16" | 1/8" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A18 | 00000 | ||
| 15/32" | 4 5/16" | 3/16" | 7/16" | Round | 3 | F&D Tool | 3015A21 | 00000 | ||
| 1/2" | 2 13/16" | 1/8" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A19 | 00000 | ||
| 1/2" | 4 5/16" | 3/16" | 7/16" | Round | 3 | F&D Tool | 3015A22 | 00000 | ||
| 17/32" | 2 13/16" | 1/8" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A21 | 00000 | ||
| 17/32" | 4 5/16" | 3/16" | 1/2" | Round | 3 | F&D Tool | 3015A23 | 00000 | ||
| 9/16" | 2 13/16" | 1/8" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A22 | 00000 | ||
| 9/16" | 4 5/16" | 3/16" | 1/2" | Round | 3 | F&D Tool | 3015A24 | 00000 | ||
| 19/32" | 2 13/16" | 1/8" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A23 | 00000 | ||
| 19/32" | 5 1/8" | 3/16" | 1/2" | Round | 3 | F&D Tool | 3015A25 | 00000 | ||
| 5/8" | 2 13/16" | 1/8" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A24 | 00000 | ||
| 5/8" | 5 1/8" | 3/16" | 1/2" | Round | 3 | F&D Tool | 3015A26 | 00000 | ||
| 21/32" | 3 1/8" | 3/16" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A25 | 00000 | ||
| 21/32" | 5 1/8" | 3/16" | 1/2" | Round | 3 | F&D Tool | 3015A27 | 00000 | ||
| 11/16" | 3 1/8" | 3/16" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A26 | 00000 | ||
| 11/16" | 5 1/8" | 3/16" | 1/2" | Round | 3 | F&D Tool | 3015A28 | 00000 | ||
| 23/32" | 3 1/8" | 3/16" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A27 | 00000 | ||
| 23/32" | 5 3/8" | 1/4" | 1/2" | Round | 3 | F&D Tool | 3015A29 | 00000 | ||
| 3/4" | 3 1/8" | 3/16" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A28 | 00000 | ||
| 3/4" | 5 3/8" | 1/4" | 1/2" | Round | 3 | F&D Tool | 3015A31 | 00000 | ||
| 25/32" | 3 1/8" | 3/16" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A29 | 00000 | ||
| 25/32" | 5 1/8" | 1/4" | 5/8" | Round | 3 | F&D Tool | 3015A32 | 00000 | ||
| 13/16" | 3 1/8" | 3/16" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A31 | 00000 | ||
| 13/16" | 5 1/8" | 1/4" | 5/8" | Round | 3 | F&D Tool | 3015A33 | 000000 | ||
| 7/8" | 3 1/8" | 3/16" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A33 | 00000 | ||
| 7/8" | 5 3/8" | 1/4" | 3/4" | Round | 3 | F&D Tool | 3015A34 | 000000 | ||
| 15/16" | 3 1/8" | 3/16" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A35 | 000000 | ||
| 15/16" | 6 1/8" | 1/4" | 3/4" | Round | 3 | F&D Tool | 3015A43 | 00000 | ||
| 1" | 3 1/8" | 3/16" | 1/4" | Round | 4 | Mist Cutting Tools | 3102A37 | 000000 | ||
| 1" | 6 3/8" | 5/16" | 3/4" | Round | 3 | F&D Tool | 3015A36 | 000000 | ||
| 1 1/8" | 6 3/8" | 5/16" | 1" | Round | 3 | F&D Tool | 3015A38 | 000000 | ||
 |
Pilot Head Dia. | Pilot Lg. | Each | |||
|---|---|---|---|---|---|
Uncoated Carbon Steel | |||||
3/32" Diameter Pilot Shank | |||||
| 3/32" | 3/32" | 3103A1 | 00000 | ||
| 1/8" | 1/8" | 3103A11 | 0000 | ||
| 5/32" | 5/32" | 3103A12 | 0000 | ||
| 3/16" | 3/16" | 3103A13 | 0000 | ||
| 7/32" | 7/32" | 3103A14 | 0000 | ||
| 1/4" | 1/4" | 3103A15 | 0000 | ||
1/8" Diameter Pilot Shank | |||||
| 1/8" | 1/8" | 3103A16 | 0000 | ||
| 5/32" | 5/32" | 3103A17 | 0000 | ||
| 3/16" | 3/16" | 3103A18 | 0000 | ||
| 7/32" | 7/32" | 3103A19 | 0000 | ||
| 1/4" | 1/4" | 3103A2 | 0000 | ||
| 5/16" | 5/16" | 3103A21 | 00000 | ||
| 3/8" | 3/8" | 3103A22 | 00000 | ||
5/32" Diameter Pilot Shank | |||||
| 3/16" | 3/16" | 3103A23 | 0000 | ||
| 7/32" | 7/32" | 3103A24 | 00000 | ||
| 1/4" | 1/4" | 3103A25 | 0000 | ||
| 9/32" | 9/32" | 3103A61 | 00000 | ||
| 5/16" | 5/16" | 3103A26 | 00000 | ||
| 3/8" | 3/8" | 3103A27 | 00000 | ||
3/16" Diameter Pilot Shank | |||||
| 3/16" | 3/16" | 3103A64 | 0000 | ||
| 1/4" | 1/4" | 3103A28 | 0000 | ||
| 9/32" | 9/32" | 3103A62 | 00000 | ||
| 5/16" | 5/16" | 3103A29 | 00000 | ||
| 11/32" | 11/32" | 3103A63 | 00000 | ||
| 3/8" | 3/8" | 3103A3 | 00000 | ||
| 13/32" | 13/32" | 3103A65 | 00000 | ||
| 7/16" | 7/16" | 3103A31 | 00000 | ||
| 15/32" | 15/32" | 3103A66 | 00000 | ||
| 1/2" | 1/2" | 3103A32 | 00000 | ||
| 17/32" | 17/32" | 3103A48 | 00000 | ||
| 9/16" | 9/16" | 3103A33 | 00000 | ||
| 5/8" | 5/8" | 3103A34 | 00000 | ||
1/4" Diameter Pilot Shank | |||||
| 5/16" | 5/16" | 3103A35 | 0000 | ||
| 3/8" | 3/8" | 3103A36 | 00000 | ||
| 7/16" | 7/16" | 3103A37 | 00000 | ||
| 1/2" | 1/2" | 3103A38 | 00000 | ||
| 9/16" | 9/16" | 3103A39 | 00000 | ||
| 5/8" | 5/8" | 3103A4 | 00000 | ||
| 11/16" | 11/16" | 3103A41 | 00000 | ||
| 3/4" | 3/4" | 3103A42 | 00000 | ||
| 13/16" | 13/16" | 3103A43 | 00000 | ||
5/16" Diameter Pilot Shank | |||||
| 3/8" | 3/8" | 3103A45 | 00000 | ||
| 7/16" | 7/16" | 3103A46 | 00000 | ||
| 1/2" | 1/2" | 3103A47 | 00000 | ||
| 5/8" | 5/8" | 3103A49 | 00000 | ||
| 11/16" | 11/16" | 3103A5 | 00000 | ||
| 3/4" | 3/4" | 3103A51 | 00000 | ||
| 1" | 1" | 3103A55 | 00000 | ||
Carbide-Tipped Steel
Shank | Uncoated | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Body Dia. | Overall Lg. | For Pilot Shank Dia. | Dia. | Type | No. of Flutes | Mfr. | Each | |||
C2 Carbide | ||||||||||
| 1/4" | 2 3/8" | 3/32" | 1/4" | Round | 3 | Rock River Tool | 31125A21 | 000000 | ||
| 1/4" | 3 13/16" | 3/32" | 15/64" | Round | 3 | Rock River Tool | 2814A81 | 000000 | ||
| 9/32" | 2 3/8" | 3/32" | 1/4" | Round | 3 | Rock River Tool | 31125A22 | 00000 | ||
| 9/32" | 3 13/16" | 3/32" | 17/64" | Round | 3 | Rock River Tool | 2814A421 | 000000 | ||
| 5/16" | 2 3/8" | 3/32" | 1/4" | Round | 3 | Rock River Tool | 31125A23 | 00000 | ||
| 5/16" | 3 13/16" | 3/32" | 19/64" | Round | 3 | Rock River Tool | 2814A591 | 000000 | ||
| 11/32" | 2 3/8" | 3/32" | 1/4" | Round | 3 | Rock River Tool | 31125A24 | 00000 | ||
| 11/32" | 3 13/16" | 3/32" | 5/16" | Round | 3 | Rock River Tool | 2814A311 | 000000 | ||
| 3/8" | 2 3/8" | 3/32" | 1/4" | Round | 3 | Rock River Tool | 31125A25 | 00000 | ||
| 3/8" | 4 1/16" | 5/32" | 5/16" | Round | 3 | Rock River Tool | 2814A83 | 000000 | ||
| 13/32" | 2 3/4" | 1/8" | 1/4" | Round | 3 | Rock River Tool | 31125A26 | 00000 | ||
| 13/32" | 4 1/16" | 5/32" | 3/8" | Round | 3 | Rock River Tool | 2814A321 | 000000 | ||
| 7/16" | 2 3/4" | 1/8" | 1/4" | Round | 3 | Rock River Tool | 31125A27 | 00000 | ||
| 7/16" | 4 1/16" | 5/32" | 3/8" | Round | 3 | Rock River Tool | 2814A84 | 000000 | ||
| 15/32" | 2 3/4" | 1/8" | 1/4" | Round | 3 | Rock River Tool | 31125A28 | 00000 | ||
| 15/32" | 4 5/16" | 3/16" | 7/16" | Round | 3 | Rock River Tool | 2814A331 | 000000 | ||
| 1/2" | 2 3/4" | 1/8" | 1/4" | Round | 3 | Rock River Tool | 31125A29 | 00000 | ||
| 1/2" | 4 5/16" | 3/16" | 7/16" | Round | 3 | Rock River Tool | 2814A85 | 000000 | ||
| 17/32" | 2 3/4" | 1/8" | 1/4" | Round | 3 | Rock River Tool | 31125A31 | 00000 | ||
| 17/32" | 4 5/16" | 3/16" | 1/2" | Round | 3 | Rock River Tool | 2814A341 | 000000 | ||
| 9/16" | 2 3/4" | 1/8" | 1/4" | Round | 3 | Rock River Tool | 31125A32 | 00000 | ||
| 9/16" | 4 5/16" | 3/16" | 1/2" | Round | 3 | Rock River Tool | 2814A86 | 000000 | ||
| 19/32" | 2 3/4" | 1/8" | 1/4" | Round | 3 | Rock River Tool | 31125A33 | 00000 | ||
| 19/32" | 5 1/8" | 3/16" | 1/2" | Round | 3 | Rock River Tool | 2814A351 | 000000 | ||
| 5/8" | 2 3/4" | 1/8" | 1/4" | Round | 3 | Rock River Tool | 31125A34 | 00000 | ||
| 5/8" | 5 1/8" | 3/16" | 1/2" | Round | 3 | Rock River Tool | 2814A87 | 000000 | ||
| 21/32" | 2 3/4" | 3/16" | 1/4" | Round | 3 | Rock River Tool | 31125A35 | 000000 | ||
| 21/32" | 5 1/8" | 3/16" | 1/2" | Round | 3 | Rock River Tool | 2814A361 | 000000 | ||
| 11/16" | 2 3/4" | 3/16" | 1/4" | Round | 3 | Rock River Tool | 31125A36 | 000000 | ||
| 11/16" | 5 1/8" | 3/16" | 1/2" | Round | 3 | Rock River Tool | 2814A371 | 000000 | ||
| 23/32" | 2 3/4" | 3/16" | 1/4" | Round | 3 | Rock River Tool | 31125A37 | 000000 | ||
| 23/32" | 5 3/8" | 1/4" | 1/2" | Round | 3 | Rock River Tool | 2814A381 | 000000 | ||
| 3/4" | 2 3/4" | 3/16" | 1/4" | Round | 3 | Rock River Tool | 31125A38 | 000000 | ||
| 3/4" | 5 3/8" | 1/4" | 1/2" | Round | 3 | Rock River Tool | 2814A89 | 000000 | ||
| 25/32" | 2 3/4" | 3/16" | 1/4" | Round | 3 | Rock River Tool | 31125A39 | 000000 | ||
| 25/32" | 5 3/8" | 1/4" | 5/8" | Round | 3 | Rock River Tool | 2814A391 | 000000 | ||
| 13/16" | 2 3/4" | 3/16" | 1/4" | Round | 3 | Rock River Tool | 31125A41 | 000000 | ||
| 13/16" | 5 3/8" | 1/4" | 5/8" | Round | 3 | Rock River Tool | 2814A91 | 000000 | ||
| 7/8" | 2 3/4" | 3/16" | 1/4" | Round | 3 | Rock River Tool | 31125A43 | 000000 | ||
| 7/8" | 5 3/8" | 1/4" | 3/4" | Round | 3 | Rock River Tool | 2814A531 | 000000 | ||
| 15/16" | 2 3/4" | 3/16" | 1/4" | Round | 3 | Rock River Tool | 31125A45 | 000000 | ||
| 15/16" | 6 1/8" | 1/4" | 3/4" | Round | 3 | Rock River Tool | 2814A561 | 000000 | ||
| 1" | 2 3/4" | 3/16" | 1/4" | Round | 3 | Rock River Tool | 31125A47 | 000000 | ||
| 1" | 6 3/8" | 5/16" | 3/4" | Round | 3 | Rock River Tool | 2814A94 | 000000 | ||
| 1 1/8" | 6 3/8" | 5/16" | 1" | Round | 3 | Rock River Tool | 2814A581 | 000000 | ||
C5 Carbide | ||||||||||
| 1/4" | 3 13/16" | 3/32" | 15/64" | Round | 3 | Rock River Tool | 2814A61 | 000000 | ||
| 9/32" | 3 13/16" | 3/32" | 17/64" | Round | 3 | Rock River Tool | 2814A422 | 000000 | ||
| 5/16" | 3 13/16" | 3/32" | 19/64" | Round | 3 | Rock River Tool | 2814A592 | 000000 | ||
| 11/32" | 3 13/16" | 3/32" | 5/16" | Round | 3 | Rock River Tool | 2814A312 | 000000 | ||
| 3/8" | 4 1/16" | 5/32" | 5/16" | Round | 3 | Rock River Tool | 2814A63 | 000000 | ||
| 13/32" | 4 1/16" | 5/32" | 3/8" | Round | 3 | Rock River Tool | 2814A322 | 000000 | ||
| 7/16" | 4 1/16" | 5/32" | 3/8" | Round | 3 | Rock River Tool | 2814A64 | 000000 | ||
| 15/32" | 4 5/16" | 3/16" | 7/16" | Round | 3 | Rock River Tool | 2814A332 | 000000 | ||
| 1/2" | 4 5/16" | 3/16" | 7/16" | Round | 3 | Rock River Tool | 2814A65 | 000000 | ||
| 17/32" | 4 5/16" | 3/16" | 1/2" | Round | 3 | Rock River Tool | 2814A342 | 000000 | ||
| 9/16" | 4 5/16" | 3/16" | 1/2" | Round | 3 | Rock River Tool | 2814A66 | 000000 | ||
| 19/32" | 5 1/8" | 3/16" | 1/2" | Round | 3 | Rock River Tool | 2814A352 | 000000 | ||
| 5/8" | 5 1/8" | 3/16" | 1/2" | Round | 3 | Rock River Tool | 2814A67 | 000000 | ||
| 21/32" | 5 1/8" | 3/16" | 1/2" | Round | 3 | Rock River Tool | 2814A362 | 000000 | ||
| 11/16" | 5 1/8" | 3/16" | 1/2" | Round | 3 | Rock River Tool | 2814A372 | 000000 | ||
| 23/32" | 5 3/8" | 1/4" | 1/2" | Round | 3 | Rock River Tool | 2814A382 | 000000 | ||
| 3/4" | 5 3/8" | 1/4" | 1/2" | Round | 3 | Rock River Tool | 2814A69 | 000000 | ||
| 25/32" | 5 3/8" | 1/4" | 5/8" | Round | 3 | Rock River Tool | 2814A392 | 000000 | ||
| 13/16" | 5 3/8" | 1/4" | 5/8" | Round | 3 | Rock River Tool | 2814A71 | 000000 | ||
| 7/8" | 5 3/8" | 1/4" | 3/4" | Round | 3 | Rock River Tool | 2814A532 | 000000 | ||
| 15/16" | 6 1/8" | 1/4" | 3/4" | Round | 3 | Rock River Tool | 2814A562 | 000000 | ||
| 1" | 6 3/8" | 5/16" | 3/4" | Round | 3 | Rock River Tool | 2814A74 | 000000 | ||
| 1 1/8" | 6 3/8" | 5/16" | 1" | Round | 3 | Rock River Tool | 2814A582 | 000000 | ||
|
Pilot Head Dia. | Pilot Lg. | Each | |||
|---|---|---|---|---|---|
Uncoated Carbon Steel | |||||
3/32" Diameter Pilot Shank | |||||
| 3/32" | 3/32" | 3103A1 | 00000 | ||
| 1/8" | 1/8" | 3103A11 | 0000 | ||
| 5/32" | 5/32" | 3103A12 | 0000 | ||
| 3/16" | 3/16" | 3103A13 | 0000 | ||
| 7/32" | 7/32" | 3103A14 | 0000 | ||
| 1/4" | 1/4" | 3103A15 | 0000 | ||
1/8" Diameter Pilot Shank | |||||
| 1/8" | 1/8" | 3103A16 | 0000 | ||
| 5/32" | 5/32" | 3103A17 | 0000 | ||
| 3/16" | 3/16" | 3103A18 | 0000 | ||
| 7/32" | 7/32" | 3103A19 | 0000 | ||
| 1/4" | 1/4" | 3103A2 | 0000 | ||
| 5/16" | 5/16" | 3103A21 | 00000 | ||
| 3/8" | 3/8" | 3103A22 | 00000 | ||
5/32" Diameter Pilot Shank | |||||
| 3/16" | 3/16" | 3103A23 | 0000 | ||
| 7/32" | 7/32" | 3103A24 | 00000 | ||
| 1/4" | 1/4" | 3103A25 | 0000 | ||
| 9/32" | 9/32" | 3103A61 | 00000 | ||
| 5/16" | 5/16" | 3103A26 | 00000 | ||
| 3/8" | 3/8" | 3103A27 | 00000 | ||
3/16" Diameter Pilot Shank | |||||
| 3/16" | 3/16" | 3103A64 | 0000 | ||
| 1/4" | 1/4" | 3103A28 | 0000 | ||
| 9/32" | 9/32" | 3103A62 | 00000 | ||
| 5/16" | 5/16" | 3103A29 | 00000 | ||
| 11/32" | 11/32" | 3103A63 | 00000 | ||
| 3/8" | 3/8" | 3103A3 | 00000 | ||
| 13/32" | 13/32" | 3103A65 | 00000 | ||
| 7/16" | 7/16" | 3103A31 | 00000 | ||
| 15/32" | 15/32" | 3103A66 | 00000 | ||
| 1/2" | 1/2" | 3103A32 | 00000 | ||
| 17/32" | 17/32" | 3103A48 | 00000 | ||
| 9/16" | 9/16" | 3103A33 | 00000 | ||
| 5/8" | 5/8" | 3103A34 | 00000 | ||
1/4" Diameter Pilot Shank | |||||
| 5/16" | 5/16" | 3103A35 | 0000 | ||
| 3/8" | 3/8" | 3103A36 | 00000 | ||
| 7/16" | 7/16" | 3103A37 | 00000 | ||
| 1/2" | 1/2" | 3103A38 | 00000 | ||
| 9/16" | 9/16" | 3103A39 | 00000 | ||
| 5/8" | 5/8" | 3103A4 | 00000 | ||
| 11/16" | 11/16" | 3103A41 | 00000 | ||
| 3/4" | 3/4" | 3103A42 | 00000 | ||
| 13/16" | 13/16" | 3103A43 | 00000 | ||
5/16" Diameter Pilot Shank | |||||
| 3/8" | 3/8" | 3103A45 | 00000 | ||
| 7/16" | 7/16" | 3103A46 | 00000 | ||
| 1/2" | 1/2" | 3103A47 | 00000 | ||
| 5/8" | 5/8" | 3103A49 | 00000 | ||
| 11/16" | 11/16" | 3103A5 | 00000 | ||
| 3/4" | 3/4" | 3103A51 | 00000 | ||
| 1" | 1" | 3103A55 | 00000 | ||
Changeable-Pilot Counterbore Sets
 |
A handful of counterbores and changeable pilots give you the versatility of dozens of normal counterbores. For each hole, mix and match counterbores and pilots to correspond with your screw-head and screw-shank diameter.
High-Speed Steel—Durable and wear resistant, these counterbores make accurate cuts in most materials without chipping or cracking.
Body Dia. | No. of Pieces | Shank Type | Includes | Container Type | Mfr. | Each | |||
|---|---|---|---|---|---|---|---|---|---|
Uncoated High-Speed Steel | |||||||||
| 1/4", 5/16", 3/8", 7/16", 1/2" | 5 | Round | 10 Pilots | Wood Case | F&D Tool | 2817A71 | 0000000 | ||
Adjustable-Diameter Counterbores
High-Speed Steel Blade
 |  |
Round Shank | Morse Taper Shank |
Counterbores | Replacement Counterbore Blades | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Shank | |||||||||||||||
Body Dia. | Overall Lg. | Dia. | Type | Machine Taper No. | Pilot Lg. | No. of Flutes | Pilot Head Dia. | Pilot Shank Dia. | Mfr. | Each | Pkg. Qty. | Pkg. | |||
| 1" to 1 1/4" | 4" | 1/2" | Round | — | 0.438" | 2 | 7/16" | 3/16" | Alvord-Polk Tool | 3104A11 | 0000000 | 2 | 3104A31 | 0000000 | |
| 1 1/4" to 1 5/8" | 4 3/8" | 1/2" | Round | — | 0.563" | 2 | 9/16" | 1/4" | Alvord-Polk Tool | 3104A14 | 000000 | 2 | 3104A32 | 000000 | |
| 2 1/8" to 2 7/8" | 6" | — | Morse Taper | Morse 3 | 0.750" | 2 | 3/4" | 3/8" | Alvord-Polk Tool | 3104A22 | 000000 | 2 | 3104A34 | 000000 | |
