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Product Specifications:
| Item | Taper Length Drill Bit |
| Coolant Fed | Coolant Through |
| Coolant Through | No |
| Cutting Direction | Right Hand |
| Decimal Equivalent | 0.25 |
| Depth X Dia. Ratio | 8xd |
| Drill Bit Dimension Type | Fractional Inch |
| Drill Bit Grouping | Drill Bit |
| Drill Bit Material | Solid Carbide |
| Drill Bit Point Angle | 140° |
| Drill Bit Point Type | R Thinning Point |
| Drill Bit Size | 1/4" |
| Drill Diameter Tolerance | 0.006 mm to 0.021 mm |
| Drill Length Class | Taper Length |
| Finish | TiAlN |
| Finish - Machining | TiAlN |
| Flute Length | 66 mm |
| Flute Type | Spiral |
| Grade | General Purpose |
| Helix Angle | 30° |
| Material | Carbide |
| Material - Machining | Carbide |
| Material Grade - Machining | General Purpose |
| Max. Drilling Depth | 66 mm |
| Number Of Coolant Holes | 2 |
| Number Of Flutes | 2 |
| Overall Length | 106 mm |
| Point Angle | 140° |
| Point Type | R Thinning Point |
| Primary Material Application | Cast Iron, Hardened Steel, Steel, Tool And Die Steel |
| Primary Material Application Iso Code | H, K, P |
| Secondary Material Application | Aluminum, Hardened Steel, Inconel, Stainless Steel, Titanium |
| Secondary Material Application Iso Code | H, M, N, S |
| Shank Dia. | 8 mm |
| Shank Length | 40 mm |
| Shank Type | Straight |
| Shank Type - Machining | Straight |
| Sheeter Drill | No |
| Size | 1/4" |
| Standards | Not Rated |
| System Of Measurement | Fractional Inch |
Shipping Info:
| Ship weight (kg) | 0.05 |
| Ship height (cm) | 2.54 |
| Ship length (cm) | 2.54 |
| Ship width (cm) | 2.54 |
Product Variants
| Product | Model | Decimal Equivalent | Overall Length | Max. Drilling Depth | Shank Dia. | Drill Bit Size | Price | |
|---|---|---|---|---|---|---|---|---|
![]() |
HP258-1890 | 0.189 | 90 mm | 50 mm | 6 mm | #12 | €180.37 | |
![]() |
8704480 | 0.189 | 105 mm | 53 mm | 6 mm | #12 | €242.98 | |
![]() |
HP258-1850 | 0.185 | 85 mm | 45 mm | 6 mm | #13 | €180.37 | |
![]() |
8704470 | 0.185 | 105 mm | 52 mm | 6 mm | #13 | €242.98 | |
![]() |
HP258-1610 | 0.161 | 85 mm | 50 mm | 6 mm | #20 | €176.62 | |
![]() |
652016011 | 0.161 | 105 mm | 45 mm | - | #20 | €237.71 | |
![]() |
HP258-1496 | 0.1495 | 85 mm | 45 mm | 4 mm | #25 | €173.05 |
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Contact us
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OSG HP258-2500 Taper Length Drill Bit, 1/4 Inch Drill Bit Size, 66 mm Flute Length, 8 mm Shank Dia
€227.14 /unit


