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Product Specifications:
| Item | Extra Long Drill Bit |
| Aircraft Drill | Yes |
| Coolant Fed | Non Coolant Through |
| Coolant Through | No |
| Cutting Direction | Right Hand |
| Decimal Equivalent | 0.4844 |
| Drill Bit Dimension Type | Fractional Inch |
| Drill Bit Finish | Bright |
| Drill Bit Material | High Speed Steel |
| Drill Length Class | Extra Long |
| Drill Point Length | 0.1" |
| Finish | Bright Uncoated |
| Flute Length | 4 3/8" |
| Flute Type | Spiral |
| Grade | Heavy Duty |
| Helix Angle | 28° |
| Left/right Hand | Right |
| List Number | 3957-12 |
| Material | High Speed Steel |
| Max. Drilling Depth | 4 3/8" |
| No. Of Flutes | 2 |
| Overall Length | 12" |
| Point Angle | 135° |
| Point Type | Split Point |
| Primary Material Application | Aluminum, Brass, Bronze, Copper, Steel |
| Primary Material Application Iso Code | N, P |
| Secondary Material Application | Cast Iron, Stainless Steel |
| Secondary Material Application Iso Code | K, M |
| Shank Dia. | 0.484" |
| Shank Length | 7 5/8" |
| Shank Type | Straight |
| Size | 0.484" |
| Spiral Direction | Right Hand |
| System Of Measurement | Imperial |
Shipping Info:
| Ship weight (kg) | 0.25 |
| Ship height (cm) | 2.54 |
| Ship length (cm) | 30.99 |
| Ship width (cm) | 2.54 |
| Country of Origin | US |
Product Variants
| Product | Model | Max. Drilling Depth | Shank Dia. | Drill Point Length | Flute Length | Shank Length | Drill Bit Size | Finish-machining | Drill Dia. Tolerance | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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C13123 | 2 5/8" | 7/32" | 0.0472" | 2 5/8" | 3 3/8" | #1 | Bright (Uncoated) | -0.001" to 0" | €13.13 | |
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C13218 | 2 5/8" | 7/32" | 0.0472" | 2 5/8" | 9 3/8" | #1 | Bright (Uncoated) | -0" to +0.0007" | €32.41 | |
![]() |
C13226 | 49/64" | 3/16" | 0.0401" | 2 7/16" | 9 9/16" | #10 | Bright (Uncoated) | -0" to +0.0007" | €25.40 | |
![]() |
C13227 | 2 5/16" | 3/16" | 0.0396" | 2 5/16" | 9 11/16" | #11 | Bright (Uncoated) | -0" to +0.0007" | €27.03 | |
![]() |
C13134 | 2.312" | 3/16" | 0.0391" | 2 5/16" | 3 11/16" | #12 | Bright (Uncoated) | -0" to +0.0007" | €10.85 | |
![]() |
C13228 | 2 5/16" | 3/16" | 0.0391" | 2 5/16" | 9 11/16" | #12 | Bright (Uncoated) | -0" to +0.0007" | €28.27 | |
![]() |
C13229 | 2.312" | 11/64" | 0.0383" | 2 5/16" | 9 11/16" | #13 | Bright (Uncoated) | -0" to +0.0007" | €25.65 |
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Contact us
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We're available Monday through Friday, from 07:30 until 17:00.
CLEVELAND C13203 3957 Extra Long Drill Bit, 31/64 Inch Drill Bit Size, 31/64 Inch Shank Dia
€70.70 /unit


