What is a Wiper Insert?

•The wiper insert is designed with a wiper edge that is situated where the straight edge meets the corner radius.

•In comparison to conventional breakers, the surface finish does not deteriorate even if the feed rate is doubled.

•Machining at high feed rates improves cutting efficiency.

•Improving Surface Finish Under the same machining conditions as conventional breakers, but with the feed rate increased, the surface finish of the workpiece can be improved.
•Improving Efficiency High feed rates not only shortened machining times but also make it possible to combine roughing and finishing operations.
•Increased Tool Life When a change to high feed conditions, the time required to cut one component is decreased, thus more parts can be machined with each insert. In addition, the high feed rate prevents rubbing, therefore, delaying the progression of wear and increasing the tool life of the insert.
•Improving Chip Control Under high feed conditions, the chips generated become thicker and are more easily broken, thus, chip control is improved.

The estimate of finished surface roughness when using a wiper insert

The effects of wiper inserts on external machining, boring and facing.

* The surface roughness when machining at corner R or taper angle over 5°, is the same as machining with standard inserts.

Special attention is not necessary when using CNMG • WNMG • CCMT types

No Restriction for Holders

A standard holders can be used.
(* A double clamp, high rigidity tool is recommended.)

Not Necessary to Adjust the Machining Programme

Conventional machining programmes can be used.
(The CNMG , WNMG , CCMT types are based on the ISO/ANSI.)

Special attention is necessary when using the DNMX • TNMX types due to the special top face geometry

Restriction for Holders

Use a holder with end cutting angle 93° for improving wiper efficiency. A holder with end cutting angle 91° can improve wiper efficiency (see the following figure), however, there is no wiper efficiency with other end cutting angles (60°, 90°, 107°etc.).

Necessary to Adjust the Machining Programme

When machining errors occur, please adjust the programme.
(The DNMX , TNMX types are not based on the ISO/ANSI.)

Adjustment of machining programmes for DNMX • TNMX types

A) Adjusting a Taper

* Necessary to maintain a correct taper.

Adjust the relief angle toward the normal line.

Note) Adjust the angle toward the normal line in the case where the adjustment number is minus (θ =60° ─ 70°) and is not machined completely.

Classification

B) Adjusting a Corner R

*Necessary to maintain a correct corner radius.
Adjust the work diameter same as the taper to prevent over-cut.

B) Adjusting a Corner R

The Easy-to-correct Method

In correcting corner radius:
It is not necessary to adjust the machining programme, however, machining errors can occur within max.
±0.03mm due to correcting by an approximate number.

Corner Radius Correction Input the correction number of each corner radius.

The Easy-to-correct Method

Others) The value of correction is same for both DNMX and TNMX. Discriminate them by the size of corner radius.