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About Drill Bits
Compare material, finish, length class, and decimal size equivalents.
High-Speed Steel Drill Bits
Jobbers' Length Round Shank | Short Length Round Shank |
Maintenance Length Round Shank 3-Flat Shank | Extended Length Round Shank |
Split |
Standard |
Shank | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Mfr. | Pkg. Qty. | Pkg. | |||
Jobbers' Length | ||||||||||||
Black Oxide | ||||||||||||
| 31/64" | 0.4844" | 5 7/8" | 3.64" | Round | 31/64" | Split | Chicago-Latrobe | 1 | 2901A141 | 000000 | ||
| 31/64" | 0.4844" | 5 7/8" | 3.64" | Round | 31/64" | Split | Chicago-Latrobe | 6 | 2901A532 | 00000 | ||
Titanium Nitride (TiN) Coated | ||||||||||||
| 31/64" | 0.4844" | 5 7/8" | 3.64" | Round | 31/64" | Split | Chicago-Latrobe | 1 | 29115A741 | 00000 | ||
| 31/64" | 0.4844" | 5 7/8" | 3.64" | Round | 31/64" | Split | Chicago-Latrobe | 6 | 29115A841 | 000000 | ||
Titanium Aluminum Nitride (TiAlN) Coated | ||||||||||||
| 31/64" | 0.4844" | 5 7/8" | 3.64" | Round | 31/64" | Split | Chicago-Latrobe | 1 | 3202A74 | 00000 | ||
Uncoated | ||||||||||||
| 31/64" | 0.4844" | 5 7/8" | 3.64" | Round | 31/64" | Standard | Viking Norseman Drill | 1 | 8870A44 | 00000 | ||
| 31/64" | 0.4844" | 5 7/8" | 3.64" | Round | 31/64" | Standard | Viking Norseman Drill | 6 | 8870A144 | 00000 | ||
Short Length | ||||||||||||
Black Oxide | ||||||||||||
| 31/64" | 0.4844" | 3 3/4" | 1.46" | Round | 31/64" | Split | Chicago-Latrobe | 1 | 2896A42 | 00000 | ||
Titanium Nitride (TiN) Coated | ||||||||||||
| 31/64" | 0.4844" | 3 3/4" | 1.46" | Round | 31/64" | Split | Viking Norseman Drill | 1 | 2908A61 | 00000 | ||
Uncoated | ||||||||||||
| 31/64" | 0.4844" | 3 3/4" | 1.46" | Round | 31/64" | Standard | Chicago-Latrobe | 1 | 8947A141 | 00000 | ||
Maintenance Length | ||||||||||||
Black/Gold Oxide | ||||||||||||
| 31/64" | 0.4844" | 4 7/8" | 3.21" | Round/3-Flat | 31/64" | Split | Viking Norseman Drill | 1 | 87755A51 | 00000 | ||
Extended Length | ||||||||||||
Black Oxide | ||||||||||||
| 31/64" | 0.4844" | 7 3/4" | 4.02" | Round | 31/64" | Standard | Chicago-Latrobe | 1 | 29315A156 | 00000 | ||
Titanium Nitride (TiN) Coated | ||||||||||||
| 31/64" | 0.4844" | 7 3/4" | 4.75" | Round | 31/64" | Standard | Dormer Pramet | 1 | 28965A816 | 00000 | ||
Uncoated | ||||||||||||
| 31/64" | 0.4844" | 12" | 8.03" | Round | 31/64" | Standard | Dormer Pramet | 1 | 2939A36 | 00000 | ||
| 31/64" | 0.4844" | 18" | 12.03" | Round | 31/64" | Standard | Dormer Pramet | 1 | 2955A32 | 00000 | ||
Cobalt Steel Drill Bits
Shank | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | |||||||||||
Titanium Nitride (TiN) Coated | |||||||||||
| 31/64" | 0.4844" | 5 7/8" | 4.38" | Round | 31/64" | Split | Dormer Pramet | 27995A541 | 000000 | ||
Titanium Aluminum Nitride (TiAlN) Coated | |||||||||||
| 31/64" | 0.4844" | 6" | 3.25" | Round | 31/64" | Split | Guhring | 2753A153 | 000000 | ||
Uncoated | |||||||||||
| 31/64" | 0.4844" | 5 7/8" | 3.14" | Hex | 31/64" | Split | Cle-Line | 4909N32 | 00000 | ||
| 31/64" | 0.4844" | 5 7/8" | 3.6" | Round | 31/64" | Split | Chicago-Latrobe | 3069A42 | 00000 | ||
Short Length | |||||||||||
Titanium Nitride (TiN) Coated | |||||||||||
| 31/64" | 0.4844" | 3 1/16" | 1.46" | Round | 31/64" | Split | Chicago-Latrobe | 2416A41 | 00000 | ||
Uncoated | |||||||||||
| 31/64" | 0.4844" | 3 3/4" | 1.46" | Round | 31/64" | Split | Chicago-Latrobe | 28765A41 | 00000 | ||
Carbide-Tipped Drill Bits
Carbide Drill Bits for Carbon Fiber, Fiberglass, and Graphite
Shank | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Angle | Drill Bit Point Type | Bit Style | Mfr. | Each | |||
Jobbers' Length | |||||||||||||
Uncoated | |||||||||||||
| 31/64" | 0.4844" | 4 3/4" | 2.4" | Round | 31/64" | 140° | Brad | Fluted | Ultra Tool | 2828A29 | 0000000 | ||
High-Speed Steel Drill Bits for Plastic
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Shank | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Angle | Drill Bit Point Type | Mfr. | Each | |||
Uncoated | ||||||||||||
| 31/64" | 0.4844" | 5 7/8" | 4.38" | Round | 31/64" | 60° | Standard | Onsrud | 27465A68 | 000000 | ||
Short-Flute High-Speed Steel Drill Bits
Chip-Clearing Cobalt Steel Drill Bits
Shank | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Flute Type | Type | Size | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | ||||||||||||
Titanium Nitride (TiN) Coated | ||||||||||||
| 31/64" | 0.4844" | 5 7/8" | 3.8" | Parabolic | Round | 31/64" | Split | Viking Norseman Drill | 3183A71 | 000000 | ||
Uncoated | ||||||||||||
| 31/64" | 0.4844" | 5 7/8" | 3.8" | Parabolic | Round | 31/64" | Split | Viking Norseman Drill | 29925A941 | 00000 | ||
Chip-Clearing High-Speed Steel Drill Bits
Shank | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Flute Type | Type | Size | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | ||||||||||||
Black Oxide | ||||||||||||
| 31/64" | 0.4844" | 5 7/8" | 3.4" | Parabolic | Round | 31/64" | Split | Chicago-Latrobe | 29925A41 | 000000 | ||
| 31/64" | 0.4844" | 6" | 3" | High Helix | Round | 31/64" | Split | Dormer Pramet | 31115A71 | 00000 | ||
Titanium Nitride (TiN) Coated | ||||||||||||
| 31/64" | 0.4844" | 5 7/8" | 3.4" | Parabolic | Round | 31/64" | Split | Chicago-Latrobe | 29925A81 | 00000 | ||
Uncoated | ||||||||||||
| 31/64" | 0.4844" | 5 7/8" | 3.4" | Parabolic | Round | 31/64" | Split | Dormer Pramet | 2754A71 | 00000 | ||
Short-Flute Cobalt Steel Drill Bits
Shank | Each | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Mfr. | 1-4 | 5-Up | |||
Jobbers' Length | ||||||||||||
Black Oxide | ||||||||||||
| 31/64" | 0.4844" | 5 7/8" | 1.46" | Round | 31/64" | Split | Cleveland | 3146A142 | 000000 | 000000 | ||
Chip-Clearing High-Speed Steel Drill Bits for Aluminum, Brass, and Bronze
Shank | Each | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Flute Type | Type | Size | Drill Bit Point Type | Mfr. | 1-5 | 6-Up | |||
Jobbers' Length | |||||||||||||
Uncoated | |||||||||||||
| 31/64" | 0.4844" | 5 7/8" | 3.4" | Low Helix | Round | 31/64" | Standard | Chicago-Latrobe | 2928A241 | 000000 | 000000 | ||
Left-Hand High-Speed Steel Drill Bits
Jobbers' Length Round Shank | Split |
Shank | Each | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Mfr. | 1-5 | 6-Up | |||
Jobbers' Length | ||||||||||||
Uncoated | ||||||||||||
| 31/64" | 0.4844" | 5 7/8" | 3.4" | Round | 31/64" | Split | ICS | 2876A431 | 000000 | 000000 | ||

























