Share

Kennametal insert technology brings chip control to your threading operations with the Top Notch™ platform.

Kennametal insert technology brings chip control to your threading operations with the Top Notch™ platform. The proprietary Kennametal recessed chip groove, when used according to our recommendations, controls the chip in most applications. The Kennametal positive rake design lowers cutting pressures, which in turn lowers damaging heat generation thus providing better tool life. Long, stringy chips no longer mar the workpiece surface finish. The danger to operators when removing long chips from the workpiece and chuck is eliminated. All of these benefits combine to improve the productivity of your threading operations.

The Last Pass

Some CNC controls require the last pass to be at a 0° infeed angle because the chip will not break on the last pass. On most carbon and alloy steels, the last pass can remain at .005" (0,127mm) depth of cut and produce an acceptable finish. For some materials, a .001" (0,025mm) to .003" (0,076mm) (spring) pass may be used to improve surface finish, however, chipbreaking action may be compromised.

Machine Programming

Modern CNC controls allow the programmer to easily adjust infeed angle, the number of passes, and depth of cut for each pass. The chip control threading insert performs best at an infeed angle of 29° 30', although 15° to 30° is acceptable. Also, it is important to maintain a minimum of .005" (0,127mm) depth of cut on every pass. In most applications, use of CNC canned cycles produce only marginally successful results. Custom written programs are better and are recommended.

Infeed Angle

In order to effectively and consistently break the chip, it is important to use an infeed angle between 28° and 29° 30'. Do not apply chip control inserts at infeed angles less than 15°.

Below are the advantages and disadvantages of the different infeed angles. 

Talk to Us!

Leave a reply

Your email address will not be published. Required fields are marked *

Kennametal delivers productivity to customers seeking peak performance in demanding environments by providing innovative custom and standard wear-resistant solutions, enabled through our advanced materials sciences, application knowledge, and commitment to a sustainable environment.

Browse Products from Kennametal

More on How-to

What does the perfect ER collet assembly look like? In this video, REGO-FIX shows you how to ensure proper TIR and torque while avoiding many of the common pitfalls that shops face.

DoALL's guide will walk you through the removal and installation processes, so you can change your blade efficiently and get back to using your bandsaw. 

In part two of How To’s “Back to the Basics” series, Jacob is teaching a group of CNC apprentices the building blocks for how to select the right tool for aluminum.

MSC

Signing into Better MRO is easy. Use your MSCdirect.com username / password, or register to create an account. We’ll bring you back here as soon as you’re done.

Redirecting you in 5 seconds