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post #1 of 8 (permalink) Old 04-02-2014, 12:31 PM Thread Starter
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First Name: Vassilis
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Default hi....cutting plexiglass with router

Hi to everybody, i am new member and i would like to ask some technical advice from old and experienced members.
I want to cut, from a square acrylic sheet 37x37cm of 2mm (type XT-extruded) the internal circle diam 31cm and to keep the internal circle , the rest from the square i dont need.I have fix a KRESS router from the oposit side of a table,having from the upper surface of the table only the bit, and i have fix also a “pilot” in order to cut the “perfect” circle with lead in from the side of square that anyway i dont need it. The question is what type of bit i have to use because now i cut with a 6 or 8 mm bit (turning slowly the sheet on the pilot) but some times it brakes the sheet and damage it even at the internal circle that i am intrested to have it good. Any suggestion? Thank you
And sorry for my english.
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post #2 of 8 (permalink) Old 04-02-2014, 04:36 PM
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Hi Vassilis, great to meet you and have you as a member of our community, welcome!

Looking forward to your participation.
Filling out your profile to include (first name,tools and short bio is strictly (optional )but does help members to better relate to each other.
Thank You John
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post #3 of 8 (permalink) Old 04-02-2014, 05:09 PM
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Hi Vassilis and welcome to the forum. It sounds like you are trying to cut a circle using a table mounted router. Using the correct bit can help. Bits for cutting plastic have different geometries from bits that cut wood. LMT Onsrud ZST43310 3 16" Solid Carbide Double Edge Straight V Flute 2 Pack | eBay

Moving the plastic sheet into the bit may also be a problem. The feed rate must be at the correct speed and must be fed smoothly. If the bit grabs the plastic and feeds a little too fast then it may shatter the plastic. I think you might be better off to use a plunge router mounted to a circle cutting jig.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #4 of 8 (permalink) Old 04-02-2014, 05:55 PM
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Agree with CC. He has chosen the right cutter and approach.
You'll never get a good circle done safely on a stationary router, (without heroics).
A sample of the setup.
And a sample fractional cut with a similar but single flute bit.
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post #5 of 8 (permalink) Old 04-02-2014, 08:06 PM
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Welcome to the forum Vassilis.

Rockhampton, Queensland, Australia

Enjoy the knowledge of others that can be found within.

‘Members are requested to add a first name in their profile as we are a very friendly bunch here'.
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post #6 of 8 (permalink) Old 04-02-2014, 10:51 PM
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welcome aboard.....enjoy


above [link]site has: outdoors type things from fishing, hunting, boating, hiking, to living off grid, gardening from veggies to flowers etc, recipes from home cooking to smokers, hobbies, home remedies, to making your own soaps etc..live members chat area.. and more...all is welcome to browse or join..
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post #7 of 8 (permalink) Old 04-03-2014, 07:38 AM
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Welcome Vassilis. This is certainly the right place to ask your question. There is a wealth of experience here and it's always a good thing to learn from others.
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post #8 of 8 (permalink) Old 04-03-2014, 03:01 PM
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Welcome aboard. I'm new here myself but this looks like the right place to learn
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