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PCD for MDF

5/12/24       
Chris

Any recommendations on PCD bits for sizing 3/4 raw & melamine backed MDF? I currently use a solid carbide 3 flute slow helix upshear, but would like to use diamond for longer tool life.

5/13/24       #2: PCD for MDF ...
Steve Member

Website: https://virmer.com/

Check Amana Tool, Whiteside or Freud, I think they have what you need

5/14/24       #3: PCD for MDF ...
Bill

Why slow Helix up shear? The slow helix part specifically. If you are getting really bad tool life it may be the feed rate and rpm. The chip should take away the heat, if the bit is getting hot it's not right.

5/14/24       #4: PCD for MDF ...
Mike

For that material, if you have a large spindle and can move fast, I would choose a 3 Flute mortise compression or a regular compression and hit speeds of around 1000 around 18000 rpm. That will keep your chipload at 0.0185. you could probably get up to 1080ipm which will give you a 0.02 chipload. A chip that size will give a good cut and carry the heat away giving good tool life. Thats my sweet spot.

5/20/24       #5: PCD for MDF ...
Jamie Hughes

Website: http://thisendup.com

I don't cut any mdf, but I do cut a lot of 1 1/8" High Pressure Laminate tables (think cafeteria tables). A carbide helix bit can cut between 20 and 40 tables out /before the edge is so degraded that it pushes the pieces around on my vacuum cups. An Amana PCD bit can cut almost 400 of the same tables before I see the need to replace them. You may have better luck than me, but it's only a few dollars difference in having them replaced vs buying new, so I buy new. I do use a compression style bit with an up/down sheer. As far as model of bit, mine are Amana DRB-208. They are pricey, but well worth it in my opinion for the material i cut. Your mileage may vary.

6/28/24       #6: PCD for MDF ...
Paloma  Member

Website: https://cncwoodworkingtools.com/

The solid carbide 3 flute slow helix upshear bit is not suitable for melamine-backed MDF because it is easy to cause edge chipping, especially for the upper surface. It is recommended to use 2 flutes or 3 flutes compression cutters instead. If the budget allows, PCD bits are the best choice.


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