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Hole-Enlarging Drill Bits
Enlarge existing holes without changing their depth. These bits have flutes with a right-hand spiral and a right-hand cut. The flutes pull chips upward as they cut for use in blind holes.
Lg. | Direction | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | For Min. Hole Dia. | Shank Dia. | Max. Drilling Dp. | Flute | Overall | Number of Flutes | Flute Style | Spiral | Cut | Cutting Dia. Tolerance | For Use On | Each | |
Black and Gold Oxide Tool Steel | |||||||||||||
| 3/8" | 1/4" | 3/8" | 1 3/4" | 1 7/8" | 4 5/16" | 4 | Spiral | Right Hand | Right Hand | -0.001" to 0" | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 000000 |
| 1/2" | 5/16" | 1/2" | 1 3/4" | 1 7/8" | 4 5/16" | 4 | Spiral | Right Hand | Right Hand | -0.001" to 0" | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
| 9/16" | 3/8" | 1/2" | 1 3/4" | 1 7/8" | 4 5/16" | 4 | Spiral | Right Hand | Right Hand | -0.001" to 0" | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
| 5/8" | 25/64" | 1/2" | 1 3/4" | 1 7/8" | 4 5/16" | 4 | Spiral | Right Hand | Right Hand | -0.001" to 0" | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
| 11/16" | 7/16" | 1/2" | 1 3/4" | 1 7/8" | 4 5/16" | 4 | Spiral | Right Hand | Right Hand | -0.001" to 0" | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
| 3/4" | 15/32" | 1/2" | 1 3/4" | 1 7/8" | 4 5/16" | 4 | Spiral | Right Hand | Right Hand | -0.001" to 0" | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
Hole-Enlarging Drill-Bit Sets
Enlarge existing holes without changing the depth. These bits have flutes with a right-hand spiral and a right-hand cut. The flutes pull chips upward as they cut for use in blind holes.
Direction | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Sizes Included | Number of Pieces | Flute Style | Spiral | Cut | Container Type | For Use On | Set | |
Black and Gold Oxide Tool Steel | |||||||||
| 1/4", 5/16", 3/8", 25/64", 15/32", 1/2", 5/8", 3/4" | 1/4", 5/16", 25/64", and 15/32" Hole-Starting Bits; 3/8", 1/2", 5/8", and 3/4" Hole-Enlarging Bits | 8 | Spiral | Right Hand | Right Hand | Metal Case | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 0000000 |