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CoroBore® BR10
Single-edge back-boring tools
Back boring considerations
When back boring, diameter range will be changed. Take care that the protrusion length of the assembly will not cause any collision.
Torque
Always use a torque wrench, and apply recommended torque on screws for insert and tool assembly torque.
Replace worn items
Replace worn or exhausted screws, washers, and cup springs. It is recommended to replace the cup springs used when clamping the slides every 5th use to keep the pre-clamping functionality in place, while setting the diameter in the pre-setter.
Lubricate once a year
Lubricate all assembly items with oil at least once a year.
Application tips
Initial considerations
Make sure the boring tool will go through the hole with the shoulder and that the front of the boring tool will not collide with the component. When back boring, the boring tool is configured to go through a hole with minimum diameter of DC/2 + BD1/2.
Tool setting for back boring
Remove the grub screw from the top cutting fluid outlet, and attach it into the lower cutting
fluid outlet in order to get the correct coolant position
Rotate cartridge 180°
Use the slide extension, if needed
Reverse rotation direction
Weak machines
When roughing, make sure the machine has the required power and torque needed for the specific boring application. Feed, number of inserts, hole diameter, and depth of cut are the main affecting parameters.
Recommendations
Cutting data
General recommendations for rough boring:
- Starting data: vc 200 m/min (valid when vc on insert box is bigger than vc 200 m/min) at short overhang. Check insert box for feed and depth of cut recommendations
- vc = 50% of recommended data on label. If vibrations occur, reduce speed and increase feed. Do not use max. recommended feed and ap at the same time.
Tightening torque
Insert screw
| ISO | ANSI | Non-ISO | Code | Size | Torx Plus | Nm | Ft/lbs |
| CC06 | CC2 (1.5) | 5513 020-03 | M 2.5 | 7 IP | 0.9 | 0.7 | |
| CC09 | CC09 | 5513 020-09 | M 3.5 | 15 IP | 3.0 | 2.2 | |
| CC12 | CC43 | 5513 020-17 | M 4 x 0.5 | 15 IP | 3.0 | 2.2 | |
| SP06 | 5513 020-33 | M 2.2 | 7 IP | 0.8 | 0.59 | ||
| SP08 | 5513 020-57 | M 3 | 9 IP | 1.7 | 1.25 | ||
| SP12 | 416.1-833 | M 3.5 | 10 IP | 2 | 1.48 | ||
| SP18 | 5513 020-25 | M 4 | 15 IP | 3 | 2.2 | ||
| SN15 | SN54 | 5512 086-03 | M 6 | 20 IP | 6.4 | 4.7 | |
CoroBore® BR10
| Insert 90° | |||||||
| Size | DCN (mm) | DCX (mm) | ISO | ANSI | Nm | Ft/lbs | Screw size |
| A | 32 | 38 | CC06 | CC2 (1.5) | 4.8 | 3.5 | M 4 |
| B | 37 | 45 | CC06 | CC2 (1.5) | 4.8 | 3.5 | M 4 |
| C | 44 | 54 | CC06 | CC2 (1.5) | 9 | 6.6 | M 5 |
| D | 53 | 65 | CC06 | CC2 (1.5) | 16 | 11.8 | M 6 |
| DX | 64 | 76 | CC09 | CC3 (2.5) | 16.0 | 11.8 | M 6 |
| E | 75 | 91 | CC12 | CC43 | 38.0 | 28.0 | M 8 |
| F | 90 | 110 | CC12 | CC43 | 75 | 55.3 | M 10 |
| G | 109 | 136 | CC12 | CC43 | 75 | 55.3 | M 10 |
| H | 135 | 170 | CC12 | CC43 | 75 | 55.3 | M 10 |
Tool holding
Bending stiffness and torque transmissions are the most important factors when choosing a tool holder for boring operations. First Choice should always be tools with Coromant Capto® coupling, which offers excellent repeatability and the best stability characteristics on the market.
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Sandvik Coromant US - Mebane, NC
+1-800-Sandvik