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Product DetailSpecification/Dimensions
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Tool Diameter(mm)
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No.
- 3
- 4
- 6
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Shank Diameter d(mm)
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Overall Length L(mm)
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Runout Length (ℓ)(mm)
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type
- BRB
Days to Ship
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- All
- 7 Day(s) or Less
Specify Alterations
Carbide Pilot Hole Correction Boring Bit
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Product DetailProduct Description
In case the hole pitch has an intersection or the inclination tolerance of the hole is demanding.
By using it before finishing the reamer, the bend of the hole can be modified.
| Part Number |
|---|
| BRB3-[1.8-2/0.1]-[6-10/1] |
| BRB4-[1.8-3.5/0.1]-[6-15/1] |
| BRB6-[2.5-5/0.1]-[10-20/1] |
| Part Number | Price | Minimum Order Qty. | Volume Discount | Days to Ship | Tool Diameter (mm) | No. | Shank Diameter d (mm) | Overall Length L (mm) | Runout Length (ℓ) (mm) |
|---|---|---|---|---|---|---|---|---|---|
- | 1 Piece(s) | 7 Day(s) or more | 1.8 ～ 2 | 3 | 3 | 40 | 6 ～ 10 | ||
- | 1 Piece(s) | 7 Day(s) or more | 1.8 ～ 3.5 | 4 | 4 | 50 | 6 ～ 15 | ||
- | 1 Piece(s) | 7 Day(s) or more | 2.5 ～ 5 | 6 | 6 | 60 | 10 ～ 20 |
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Specifications
| Model Number | Flute Diameter D 0.1 mm Increment Designation | Recess Length ℓ 1 mm Increment Designation | Overall Length L | Shank Diameter d | |
| No. | |||||
| BRB | 3 | 1.8 ~ 2.0 | 6 ~ 10 | 40 | 3 |
| 4 | 1.8 ~ 2.4 | 6 ~ 10 | 50 | 4 | |
| 2.5 ~ 3.5 | 10 ~ 15 | ||||
| 6 | 2.5 ~ 3.0 | 10 ~ 15 | 60 | 6 | |
| 3.1 ~ 5.0 | 10 ~ 20 |
More Information
● When there is tolerance on the hole pitch, or when the allowable margin of error in the hole inclination is very limited, the use of this product before finishing with a reamer allows the hole skew to be corrected.
■Reference examples of machining process
(when positional accuracy, diameter precision, or surface roughness are required)
| Finished Diameter | Diameter of Pilot Hole (drill diameter) | Diameter of Pilot Hole (bit diameter) | Spiral Reamer | Pentagonal, Hexagonal Reamer |
| Ø 2.0 | Ø 1.7 | Ø 1.8 | Ø 1.98 | Ø 2.00 |
| Ø 2.5 | Ø 2.2 | Ø 2.3 | Ø 2.48 | Ø 2.50 |
| Ø 3.0 | Ø 2.7 | Ø 2.8 | Ø 2.98 | Ø 3.00 |
| Ø 3.5 | Ø 3.2 | Ø 3.3 | Ø 3.48 | Ø 3.50 |
| Ø 4.0 | Ø 3.7 | Ø 3.8 | Ø 3.98 | Ø 4.00 |
| Ø 4.5 | Ø 4.2 | Ø 4.3 | Ø 4.48 | Ø 4.50 |
| Ø 5.0 | Ø 4.7 | Ø 4.8 | Ø 4.98 | Ø 5.00 |
■ Cutting Conditions
| Bit Diameter | Feed Rate F (mm/min) | Revolution Speed (min-1) |
| Ø 1.8 | 22 | 3,700 |
| Ø 2.3 | 25 | 3,400 |
| Ø 2.8 | 27 | 3,100 |
| Ø 3.3 | 28 | 2,900 |
| Ø 3.8 | 30 | 2,700 |
| Ø 4.3 | 31 | 2,500 |
| Ø 4.8 | 32 | 2,300 |
Basic Information
| Shank type | End Mill Shank | Work Material | General Steel / Heat-Treated Steel / Stainless Steel / Cast Iron / Aluminum / Copper | Coating Presence | None |
|---|---|---|---|---|---|
| Groove Shape | Straight | Base-Blade Availability | None | Diameter Tolerance(mm) | -0.02 ~ 0 |
| Tool Material Type | Carbide |
- The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .
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