Disposable diamond cutters

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Nick M Singer
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Joined: Fri, Jun 17 2005, 12:23AM
Location: South Africa

Disposable diamond cutters

Postby Nick M Singer » Sat, Aug 26 2006, 1:21AM

Anyone got some feedback on disposable diamond compression cutters? I tried one and burned it badly after about 3 sheets ouch! A collegue of mine uses them and claims he is getting 180 sheets of melamine (9 x 6) per cutter. He recommends 6500mm p/m at 18000 RPM which seems to defy logic, but then you never know.

Michael Kowalczyk
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Joined: Tue, May 10 2005, 11:35AM
Location: Houston, Texas

Postby Michael Kowalczyk » Tue, Aug 29 2006, 4:09PM

Good day Nick,

I use PCD's all the time. Some are good but most are very limited to 300 IPM (I do not know what that converts to quickly in metric) I have been using Gladu 1/2\" up down shear on 5/8\" 2 sided MDF core melamine for about 7 + years with good success (750 to 850 IPM @ 17500 to 19250 RPM). I have tried many others and they do the same as what you have experienced and worse. Many times the weld breaks on a cutter or the plunge tip.

I also ramp down to the part at around 130IPM so this helps with the life of the plunge tip since it is usually carbide instead of diamond.

I was just at the IWF in Atlanta Georgia and went to all the tooling companies that offer PCD's to see if they could match or beat the average life of a Gladu bit (we have them range from 150 sheets to over 250 sheets) and only 2 said they would let me try theirs to compare. Most others say they are only made to go upto 300IPM for the disposable ones that are 1/2\" diameter. If you can use the 3/4\" and up then you can get an agressive one with 3-4 flutes and a thicker core.

I am limited to a 1/2\" bit for my current application.

I am also looking into insert bits but once again am limited to 1/2\" and so far no one has a bit that has an up/down shear capability, so the quest continues...

Hope this helps.

Cheers,
Michael Kowalczyk, GM

HP-Elite Quad Core Q6700-4 MB ram, Nvidia GeForce 512 MB Dual HP 22" flat panels, Windows 7 ultimate 64bit SP1

Nick M Singer
Guru Member
Posts: 828
Joined: Fri, Jun 17 2005, 12:23AM
Location: South Africa

Postby Nick M Singer » Tue, Aug 29 2006, 11:56PM

Hi Michael. Thanks for your feedback. 300IPM is about 7.6 mpm so the setting I am using is about right if not a little slower. I will adjust my ramp in as advised and see if I get the yields reported.


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