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Counterbores N with a diameter of 50mm and larger are all made with a driving lip. These sizes should be used in the appropriate type M toolholder.
Dimensions (mm) N, NA & W
Counterbores N, and NA with of 50 mm and larger are all made with a driving lip. These sizes should be used in the appropriate type M toolholder
d: 14.0; d1: 6.0; L: 48.0; L1: 28.0.
| Tool Type | Counterbore |
| Shank Type | Weldon |
| Shank Diameter | 14mm |
| Product Type | Counterbore HSS |
| Material Grade | M2 |
| Cutting Diameter | 27.5mm |
| MFR Part No. | 7393906453708 |
| Part Number | 1NA-27.5 |
| Finish/Coating | Uncoated |
| Standards Met | ISO9001; ISO14001 |
| Overall Length | 48mm |
| Material | HSS |
| Series | NA |
| Head Type | Multiple Flute |
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