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CoroTurn® 107

For internal and external turning of slender components

Instructions

Handling instruction

For round inserts and tool holders with rail interface.

View and download here

Insert seat

Clean and inspect insert seat for damaged locations and support for cutting edge

Shims and shim seats

Ensure that shim corners have not been knocked off during machining or handling and shim seats should have no edge build up

Contact faces

Check supporting and contact faces, making sure there is no damage or dirt.

Tool clamping

In internal turning operations, it is important to have the best possible tool clamping. Reduce the risk of vibration by using the recommended clamping length, minimum 4 X BD (bar diameter).

Spare parts

Apply sufficient screw lubrication to prevent seizure. Lubricant should be applied to the screw thread as well as the screw head face.

Inspect pockets

Pockets can become oversized due to wear and the insert does not sit properly in the pocket sides. Use a 0.02 mm shim to check the gap.

Coolant connection on QS shanks

There are four ways to connect the coolant: using adaptor (first choice), using rear tube connection, with front and underneath connection or with rear tube connection with a QS-stop.


​Application tips​

Vibration sensitive components

Vibration sensitive components

The recommendation is to machine the whole cut in one pass to direct the force into the chuck/ spindle. The entering angle could be used for directing the cutting forces. Increased entering angle gives resulting cutting forces against the set-up and imposes less bending force on the component.

Machining slender components

Machining slender components

Entering angle effect: Always try to work with an angle close to 90/0 degree, as even a small change (from a 91/-1 to a 95/-5 degree) will give impact on the cutting force direction during machining.

Over and under coolant: when to use what?

Over and under coolant: when to use what?

Using precision over and under coolant is an effective way to overcome chip control challenges and increase tool life. Find out how to apply coolant correctly and other useful coolant recommendations that can improve performance in turning operations.

Non-linear turning

Non-linear turning

Non-linear turning is an efficient strategy for pocketing in tough-to-machine materials. The wear point moves around the cutting edge and there is less risk of vibrations when entering the workpiece. Use CoroTurn® 107 with rail interface to optimize your non-linear turning operations and achieve increased process security, productivity, tool life, chip control and reduced tool inventory.

Recommendations

Insert and system

External longitudinal and facing

Finishing Medium Roughing
Insert shape C C C
Insert size 09 09 12
Entering angle 95° 95° 95°
Clamping Screw Screw Screw

External profiling

Finishing Medium
D D
11 11
93° 93°
Screw Screw

Internal longitudinal and facing

Finishing Medium
Insert shape T T
Insert size 05 09
Entering angle 91° 91°
Clamping Screw Screw
Hole Ø 6-13 ≥ 13,5

Internal profiling

Finishing Medium
D D
07 07
93° 93°
Screw Screw
≥ 13 ≥ 13

Insert grade

Machining conditions P M K N S H
Good GC4415 GC2220 GC3210 H10 GC1105 CB7115
Average GC4425 GC2025 GC3210 H10 GC1115 CB7125
Difficult GC4335 GC2035 GC3225 H10 GC1125 CB7135

Insert geometry

Operation P M K N S H
Finishing -PF -MF -KF -AL -UM S01020
Medium -PM -MM -KM -AL -MF S01020
Roughing -PR -MR -KR -AL -MM S02030


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