Mounting of cartridge, slide extension and setting of CoroBore® 825
Mounting of cartridge
| - | Clean adapter and cartridge. |
| - | Fit cartridge to cross slide. |
| - | Tighten cartridge screw to specified torque. |
Setting should be done in tool setter
| 1. | Mount insert. |
| 2. | Set tool setter to required diameter. |
| 3. | Place tool in tool setter. |
| 4. | Rotate tool to obtain largest diameter on display. |
| 5. | Unlock clamping screw. |
| 6. | Retract cartridge by turning dial counterclockwise to facilitate setting from smaller to larger diameter. |
| 7. | Set diameter by turning dial clockwise. |
| 8. | Tighten locking screw to specified torque. |
| Mounting of cartridge for back boring
| - | Clean adapter and cartridge. |
| - | Remove grub screw from top cutting fluid outlet and screw it into lower cutting fluid outlet. |
| - | Mount slide extension when needed. |
| - | Rotate cartridge 180° and fit cartridge to cross slide. |
| - | Tighten cartridge screw to specified torque. |
Note! When slide extension is used the longer screw supplied must be used!
Direction of rotation must be reversed when back boring!
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Mounting of modular shank boring tools
| - | Clean all parts. |
| - | Fit o-ring to fine boring head. |
| - | Fit fine boring head to extension slide. |
| - | Tighten the two head screws. |
| - | Fit extension slide on adapter over cutting fluid outlet without grub screw. |
| - | Fit counter weight. |
| - | Fit cartridge to cross slide. |
| - | Tighten cartridge screw to specified torque. |
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Setting should be done in tool setter
1. | Mount insert. |
2. | Set tool setter to required diameter. |
3. | Place tool in tool setter. |
4. | Rotate tool to obtain largest diameter on display. |
5. | Perform rough setting by moving extension slide. |
6. | Tighten extension slide screws. |
7. | Unlock locking screw on fine boring head. |
8. | Retract cartridge by turning dial counterclockwise to facilitate setting from smaller to larger diameter. |
9. | Set diameter by turning dial clockwise. |
10. | Tighten locking screw to specified torque. |
11. | Set counter weight to same scale value as extension slide. |
12. | Tighten counter weight screws to specified torque. |
 | Set counter weight to same scale value as extension slide. |
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WARNING |
Setting the fine boring unit diameter without first unlocking the locking screw will result in damage to the tool. The same thing will happen if the setting limits are exceeded.
It is vital that the flat of the ball – not the sphere – is directed towards the cross-slide. Otherwise the cross-slide will be damaged. |
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Torque for cartridge screws
| Size A | 1.2 Nm |
| Size B | 3.0 Nm |
| Size C | 6.0 Nm |
Torque for locking screws
| Adapter dia. | 19-29 mm | 0.9 Nm |
| Adapter dia. | 28-36 mm | 1.2 Nm |
| Adapter dia. | 35-56 mm | 3.0 Nm |
| Adapter dia. | 55-XX mm | 6.0 Nm |
Torque for insert screws
| Size 06 | 0.6 Nm |
| Size 09 | 0.8 Nm |
| Size 11 | 0.9 Nm |
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Lubrication
Lubricating should be done at regular intervals. It is done by depressing the spring-loaded ball and adding a few drops of light oil. |
Recommended light oil:
E.g.
Mobil Vactra oil No. 2
BP Olex HLP-D
Kluber Isoflex PDP 94 |  |
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Cutting data
Insert, feed and depth of cut recommendations
for medium carbon- and low alloy steels
Insert | Depth of cut, mm | Feed, mm/rev |
 | Min | Max | Min | Max |
| TCGX 06T102L - K | 0.07 | 0.50 | 0.05 | 0.10 |
| TCGT 110204L - K | 0.05 | 0.15 |
| TCGT 090204L - K |
| TCEX 06T102L - F | 0.05 | 0.50 | 0.02 | 0.12 |
| TCEX 090202L - F | 0.02 | 0.15 |
| TCEX 110302L - F | 0.02 | 0.20 |
| TCGX 06T104L - WK | 0.10 | 0.50 | 0.05 | 0.25 |
| TCGX 090204L - WK |
| TCGX 110204L - WK |
| TPMT 06T102 - F | 0.10 | 0.50 | 0.05 | 0.10 |
| TPMT 090204 - F | 0.05 | 0.20 |
| TPMT 110304 - F |
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The geometries above are suitable for finish boring and will perform excellently with the recommended cutting data. Unfavorable conditions e.g. thin work pieces, bad fixturing, worn spindle bearings and long overhangs, can cause vibrations with unacceptable surface finish as results.
In order to avoid such conditions.
- Use the largest basic holder possible with reductions.
- Use insert with sharp cutting edge.
- Use as small nose radius as possible.
- Reduce cutting speed.
Note! Do not combine maximum recommended depth of cut with maximum recommended feed. |
Start values
These recommendations are good starting values for most materials
| Cutting speed: Initially no more than 50% of that recommended for external turning |
| CoroTurn 107 inserts | Grade | Feed mm/rev |
| TCGX 06T104L-WK | 1125 | 0.10 |
| TCGX 090204L-WK | 5015 | 0.15 |
| TCGX 110204L-WK | 5015 | 0.15 |
| TCEX 06T102L - F | 1125 | 0.08 |
| TCEX 090202L - F | 1125, 5015 | 0.10 |
| TCEX 110302L - F | 1125, 5015 | 0.10 |
| CoroTurn 111 inserts | Grade | Feed mm/rev |
| TPMT 06T104-xF | 1125 | 0.08 |
| TPMT 090204-xF | 1125 | 0.10 |
| TPMT 110304-XF | 1125 | 0.10 |
| Cutting speed vc max: 1200 m/min |
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Setting scale for CoroBore 825
One full turn of the scale will move the insert 0.25 mm radially. Subsequently the diameter change will be 0.5 mm.
The dial has 50 divisions. Each division represents 0.5/50 = 0.010 mm/diameter.
The vernier has 5 divisions. Each scale division can be divided into 5 parts 0.010/5 = 0.002 mm, making it possible to adjust the diameter by 0.002 mm.
Example of setting
In this example the blue line on scale disc is reference since it is aligned to a line on the vernier in the start position. | |
| Start position | Adjusted position | |
|  | Scale disc turned clockwise until line of scale (red) lines up with second line (green) of vernier.
Diameter increased by 0.002 mm. |
|  | Scale disc turned clockwise until line of scale (red) lines up with third line (green) of vernier.
Diameter increased by 0.004 mm. |
|  | Scale disc turned clockwise until line of scale (red) lines up with fourth line (green) of vernier.
Diameter increased by 0.006 mm. |
|  | Scale disc turned clockwise until line of scale (red) lines up with fifth line (green) of vernier.
Diameter increased by 0.008 mm. |
|  | Scale disc turned clockwise until line of scale (red) lines up with sixth line (green) of vernier.
Diameter increased by 0.010 mm = 1 division of scale. |
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