CoroBore® 825
Fine boring tools for high-precision boring
CoroBore® 825
Requirement: Tool pre-setter
Mounting of cartridge
Mounting of cartridge for back boring
Note: When slide extension is used, the longer screw supplied with the slide extension must be used! Direction of rotation must be reversed when back boring! Check tool length and length of the adaptor. Make sure the boring tool will go through the hole with the shoulder and that the front of the boring tool does not.
Tool setting of diameter
Note: For CoroBore® 825 EH the adjustment ranges are:
C3, shank 04, 06, 08 = 1 mm radially
C4, shank 10 = 1.5 mm radially
Back boring with CoroBore® 825 Silent Tools™
Slide extension for increased diameter range and extension of back boring cartridges
- An additional slide extension is needed in order to not collide with the tool
- Offers the same internal coolant flow to the cutting edge as with conventional boring
|
Diameter range, forward boring mm (inch) |
Diameter range, back boring mm (inch) |
Back boring cartridge KIT (incl. 1 pcs cartridge, 1 pcs slide extension) |
Back boring cartridge code | Slide extension code |
| 19–36 (0.748–1.417) |
31–48 (1.220–1.890) |
825A-TC06U-BW | L825A-AF11STUC06T1 | 825A-030A |
| 35–56 (1.378–2.205) |
48–69 (1.890–2.717) |
825B-TC06U-BW | L825B-AF15STUC06T1 | 825B-036A |
| 55–167 (2.165–6.575) |
69–181 (2.717–7.126) |
825C-TC09U-BW | L825C-AF20STUC0902 | 825C-048A |
Back boring cartridges
Using the back boring cartridges and one slide extension will change the diameter range of the tool.
mm |
|||||||||
Adaptor size |
BD1 |
Front boring |
Slide Extension |
Back boring with one extension and
|
|||||
DCN |
DCX |
DCN-B |
DCX-B |
DPN-B
|
DPX-B
|
Tool ∆LF |
|||
| 18 | 18 | 19 | 23 | 3 | 31 | 35 | 24.5 | 26.5 | -22 |
| A | 20 | 23 | 29 | 3 | 35 | 41 | 27.5 | 30.5 | -22 |
| B | 25 | 28 | 36 | 3 | 40 | 48 | 32.5 | 36.5 | -22 |
| C | 32 | 35 | 45 | 3.6 | 48 | 58 | 40 | 45 | -32 |
| D | 40 | 44 | 56 | 3.6 | 57 | 69 | 48.5 | 54.5 | -32 |
| E | 50 | 55 | 70 | 4.8 | 69 | 84 | 59.5 | 67 | -43 |
| F | 63 | 69 | 87 | 4.8 | 83 | 101 | 73 | 82 | -43 |
| G | 80 | 86 | 107 | 4.8 | 100 | 121 | 90 | 100.5 | -43 |
| H | 100 | 106 | 137 | 4.8 | 120 | 151 | 110 | 125.5 | -43 |
| I | 130 | 136 | 167 | 4.8 | 150 | 181 | 140 | 155.5 | -43 |
Inch |
|||||||||
Adaptor size |
BD1 |
Front boring |
Slide Extension |
Back boring with one extension and
|
|||||
DCN |
DCX |
DCN-B |
DCX-B |
DPN-B
|
DPX-B
|
Tool ∆LF |
|||
| 18 | 0.709 | 0.748 | 0.905 | 0.118 | 1.220 | 1.378 | 0.964 | 1.043 | -0.866 |
| A | 0.787 | 0.906 | 1.142 | 0.118 | 1.378 | 1.614 | 1.083 | 1.201 | -0.866 |
| B | 0.984 | 1.102 | 1.417 | 0.118 | 1.575 | 1.890 | 1.280 | 1.437 | -0.866 |
| C | 1.260 | 1.378 | 1.772 | 0.142 | 1.890 | 2.283 | 1.575 | 1.772 | -1.260 |
| D | 1.575 | 1.732 | 2.205 | 0.142 | 2.244 | 2.717 | 1.909 | 2.146 | -1.260 |
| E | 1.968 | 2.165 | 2.756 | 0.190 | 2.717 | 3.307 | 2.343 | 2.638 | -1.693 |
| F | 2.480 | 2.717 | 3.425 | 0.190 | 3.268 | 3.976 | 2.874 | 3.228 | -1.693 |
| G | 3.150 | 3.386 | 4.213 | 0.190 | 3.937 | 4.764 | 3.543 | 3.957 | -1.693 |
| H | 3.937 | 4.173 | 5.394 | 0.190 | 4.724 | 5.945 | 4.331 | 4.941 | -1.693 |
| I | 5.118 | 5.354 | 6.575 | 0.190 | 5.905 | 7.126 | 5.512 | 6.122 | -1.693 |
How to adjust the fine boring head
- Unlock slide
- Adjust diameter
- Lock slide
- Check result
Note: Always adjust from smaller to bigger diameter. If you over stroke, go some distance back to eliminate eventual play in the mechanism, and approach decided setting diameter from the inside again.
Setting scale for the fine boring head
- One full turn of the scale will move the insert 0.25 mm (0.010 inch) radially, e.g 0.5 mm (0.02 inch) on diameter
- The dial has 50 divisions, representing 0.010 mm (0.0004 inch)/ diameter. The vernier has 5 divisions, making it possible to adjust the diameter by 0.002 mm (0.00008 inch)
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Sandvik Coromant UK
+44 (0)121 368 0305