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Product Specifications:
| Item | Screw Machine Drill Bit |
| Coolant Fed | Coolant Through |
| Coolant Through | No |
| Cutting Direction | Right Hand |
| Decimal Equivalent | 0.3125 |
| Depth X Dia. Ratio | 3xd |
| Drill Bit Dimension Type | Fractional Inch |
| Drill Bit Grouping | Drill Bit |
| Drill Bit Point Angle | 140° |
| Drill Bit Point Type | R Thinning Point |
| Drill Bit Size | 5/16" |
| Drill Diameter Tolerance | 0.006 mm to 0.021 mm |
| Drill Length Class | Screw Machine Length |
| Finish | Aluminum Titanium Nitride |
| Finish - Machining | TiAlN |
| Flute Length | 41 mm |
| Flute Type | Spiral |
| Grade | General Purpose |
| Material | Solid Carbide |
| Material - Machining | Carbide |
| Material Grade - Machining | General Purpose |
| Measurement System | Fractional Inch |
| Number Of Coolant Holes | 2 |
| Number Of Flutes | 2 |
| Overall Length | 79 mm |
| 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, Nickel Alloy, Stainless Steel, Titanium |
| Secondary Material Application Iso Code | H, M, N, S |
| Shank Dia. | 8 mm |
| Shank Length | 38 mm |
| Shank Type | Straight |
| Shank Type - Machining | Straight |
| Sheeter Drill | No |
| Standards | Not Rated |
| System Of Measurement | Imperial |
| Web Thinning | R Thinned |
Shipping Info:
| Ship weight (kg) | 0.18 |
| Ship height (cm) | 2.54 |
| Ship length (cm) | 2.54 |
| Ship width (cm) | 2.54 |
Product Variants
| Product | Model | Overall Length | Decimal Equivalent | Drill Bit Size | Shank Dia. | Max. Drilling Depth | Price | |
|---|---|---|---|---|---|---|---|---|
![]() |
220-2280 | 2 3/4" | 0.228 | #1 | 0.219" | 44.5 mm | €48.65 | |
![]() |
215-2280 | 2 7/16" | 0.228 | #1 | 0.219" | 33.3 mm | €54.59 | |
![]() |
215-1935 | 2 1/4" | 0.1935 | #10 | 0.188" | 30.2 mm | €45.23 | |
![]() |
220-1935 | 2 1/4" | 0.1935 | #10 | 0.188" | 41.3 mm | €43.87 | |
![]() |
215-1910 | 2 1/4" | 0.191 | #11 | 0.188" | 30.2 mm | €42.86 | |
![]() |
220-1890 | 2 3/4" | 0.189 | #12 | 0.188" | 41.3 mm | €43.32 | |
![]() |
215-1890 | 57 mm | 0.189 | #12 | 4.8 mm | 30.2 mm | €43.70 |
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OSG HP253-3126 Screw Machine Drill Bit, 5/16 Inch Size, 79 mm Overall Length
€122.35 /unit



