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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.

View More Instructions

Handling instructions for CoroBore rough boring

View and download it here

Setup

Check machine spindle, run-out, wear, and clamping force.

Clean assembly items

Clean all assembly items before assembly. Check inserts and insert seats regularly so they are free from dirt and not damaged.

Application tips

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

Cor​oBore® 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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