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Product Specifications:
| Item | Jobber Length Drill Bit |
| Aircraft Drill | Yes |
| Application | For Alloy Steel, Carbon Steel And Cast Iron |
| Coolant Fed | Non Coolant Through |
| Coolant Through | No |
| Cutting Direction | Right Hand |
| Decimal Equivalent | 0.159 |
| Depth Dia. Ratio | 4Xd |
| Drill Bit Dimension Type | Wire |
| Drill Bit Finish | Bright |
| Drill Bit Material | High Speed Steel |
| Drill Bit Point Angle | 135° |
| Drill Bit Point Type | Split Point |
| Drill Bit Size | #21 |
| Drill Dia. Tolerance | -0" to +0.0007" |
| Drill Length Class | Jobber Length |
| Drill Point Length | 0.0329" |
| Finish | Bright |
| Finish-machining | Bright (Uncoated) |
| Flute Length | 2 1/8" |
| Flute Type | Spiral |
| Grade | Heavy Duty |
| Helix Angle | +21° to +34° |
| Left/right Hand | Right |
| List Number | 3957 |
| Material | High Speed Steel |
| Material Grade-machining | HIGH PERFORMANCE |
| Material-machining | High Speed Steel |
| Max. Drilling Depth | 5/8" |
| Measurement System | Wire |
| No. Of Flutes | 2 |
| No. Of Pieces | 1 |
| Overall Length | 6" |
| 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 |
| Series | 3957-6 Series |
| Shank Dia. | 5/32" |
| Shank Type | Straight |
| Shank Type-machining | Straight |
| Size | #21 |
| Spiral Direction | Right Hand |
Shipping Info:
| Ship weight (kg) | 0.01 |
| Ship height (cm) | 2.54 |
| Ship length (cm) | 15.49 |
| Ship width (cm) | 2.54 |
| Country of Origin | US |
Product Variants
| Product | Model | Size | Max. Drilling Depth | Primary Material Application Iso Code | Flute Length | Shank Length | Drill Bit Size | Drill Dia. Tolerance | Shank Dia. | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
C73438 | #10 | 3/4" | N, P | 2 7/16" | 1 3/16" | #10 | -0" to +0.0007" | 3/16" | €6.83 | |
![]() |
C13132 | #10 | 49/64" | N, P | 2.438" | 3.562" | - | - | 0.188" | €14.13 | |
![]() |
C73439 | #11 | 3/4" | N, P | 2 5/16" | 1 3/16" | #11 | -0" to +0.0007" | 3/16" | €5.88 | |
![]() |
C73440 | #12 | 3/4" | N, P | 2 5/16" | 1 3/16" | #12 | -0" to +0.0007" | 3/16" | €6.54 | |
![]() |
C11666 | #12 | 1 47/64" | N, P | 2.312" | 1.188" | - | - | 0.188" | €7.27 | |
![]() |
C73441 | #13 | 1 47/64" | N, P | 2 5/16" | 1 3/16" | #13 | -0" to +0.0007" | 11/64" | €6.37 | |
![]() |
C11667 | #13 | 1 47/64" | N, P | 2 5/16" | 1 3/16" | #13 | -0" to +0.0007" | 11/64" | €7.34 |
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CLEVELAND C13143 3957 Jobber Length Drill Bit, #21 Size, 2 1/8 Inch Flute Length, 5/32 Inch Shank Dia
€11.08 /unit




