HIGH SPEED STEEL BORING BARS SETS
SKU: 251
- Made from high speed steel
- Also available in high carbon steel
- Available in sets of three pieces including
bottoming, medium and taper pitches
- Completely hardened and ground
- Threads are ground in high speed steel taps
- Available individually
- Packed in sturdy plastic boxes
SIZES IN INCH
SIZES IN MM
| Cat. No. | Shank Dia | Overall Length | Minimum Bore | Maximum Bore |
| inch | inch | inch | inch | |
| CH251001A | 1/4” | 1-7/8” | 5/32” | 5/16” |
| 1/4” | 2 | 5/32” | 7/16” | |
| 1/4” | 2-3/16” | 3/16” | 5/8” | |
| 1/4” | 2-9/32” | 3/16” | 11/16” | |
| 1/4” | 2-3/8” | 3/16” | 3/4” | |
| 1/4” | 2-9/16” | 1/4” | 1” | |
| 1/4” | 2-7/8” | 1/4” | 1-5/16” | |
| 1/4” | 3-1/4” | 1/4” |
1-5/8” |
| Cat. No. | Shank Dia | Overall Length | Minimum Bore | Maximum Bore |
| inch | inch | inch | inch | |
| CH251001B | 5/16” | 1-7/8” | 1/4” | 5/16” |
| 5/16” | 2 | 1/4” | 7/16” | |
| 5/16” | 2-3/16” | 9/32” | 5/8” | |
| 5/16” | 2-9/32” | 9/32” | 11/16” | |
| 5/16” | 2-3/8” | 9/32” | 3/4” | |
| 5/16” | 2-9/16” | 9/32” | 1” | |
| 5/16” | 2-7/8” | 5/16” | 1-5/16” | |
| 5/16” | 3-1/4” | 5/16” | 1-5/8” |
| Cat. No. | Shank Dia | Overall Length | Minimum Bore | Maximum Bore |
| inch | inch | inch | inch | |
| CH251001 C | 3/8” | 1-13/16” | 1/4” | 9/16” |
| 3/8” | 2-3/16” | 1/4” | 15/16” | |
| 3/8” | 2 | 9/32” | 3/4” | |
| 3/8” | 2-1/2” | 9/32” | 1-1/4” | |
| 3/8” | 2-3/16” | 9/32” | 15/16” | |
| 3/8” | 2-13/16” | 9/32” | 1-9/16” | |
| 3/8” | 2-3/8” | 5/16” | 1-1/8” | |
| 3/8” | 3-3/16” | 5/16” | 1-7/8” |
| Cat. No. | Shank Dia | Overall Length | Minimum Bore | Maximum Bore |
| inch | inch | inch | inch | |
| CH251001 D | 1/2” | 2-1/8” | 1/4” | 3/4” |
| 1/2” | 2-5/8” | 1/4” | 1-1/4” | |
| 1/2” | 2-5/16” | 5/16” | 15/16” | |
| 1/2” | 2-15/16” | 5/16” | 1-9/16” | |
| 1/2” | 2-1/2” | 3/8” | 1-1/8” | |
| 1/2” | 3-1/4” | 3/8” | 1-7/8” | |
| 1/2” | 2-11/16” | 7/16” | 1-5/16” | |
| 1/2” | 3-9/16” | 7/16” | 2-3/16” | |
| 1/2” | 2-7/8” | 1/2” | 1-1/2” | |
| 1/2" | 3-7/8” | 1/2” | 2-1/2” |
| Cat. No. | Shank Dia | Overall Length | Minimum Bore | Maximum Bore |
| Inch | Inch | Inch | Inch | |
| CH251001 E | 3/4” | 2-7/8” | 3/8” | 1-1/8” |
| 3/4” | 3-5/8” | 3/8” | 1-7/8” | |
| 3/4” | 3-1/16” | 7/16” | 1-5/16” | |
| 3/4” | 3-15/16” | 7/16” | 2-3/16” | |
| 3/4” | 3-1/4” | 1/2” | 1-1/2” | |
| 3/4” | 4-1/4” | 1/2” | 2-1/2” | |
| 3/4” | 3-7/16” | 9/16” | 1-11/16” | |
| 3/4” | 4-9/16” | 9/16” | 2-13/16” | |
| 3/4” | 3-5/8” | 5/8” | 1-7/8” | |
| 3/4” | 4-7/8” | 5/8” | 3-1/8” | |
| 3/4” | 3-13/16” | 11/16” | 2-1/16” | |
| 3/4” | 5-3/16” | 11/16” | 3-7/16” | |
| 3/4” | 4 | 3/4” | 2-1/4” | |
| 3/4” | 5-1/2” | 3/4” | 3-3/4” |
