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Thread: CNC bits ?

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    CNC bits ?

    I am just starting to figure out my new Zenbot cnc router.

    The spindle is a Bosch Colt palm router that takes 1/4" bits. I was wondering if there is a website or something that would tell me what kind/size etc. of bits to use for certain cuts.

    What bit would you use for engraving text on a panel, which bit to cut it out etc.

    thanks.

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    300+ Forum Addict Steve A's Avatar
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    Re: CNC bits ?

    I'm not sure about hobbyist cnc's but i remember when i was in the trade the various bits we used.

    Endmills are for ending up or blocking up rough billets of material, meaning shaping up your piece square etc.
    Slotdrills can be used for blocking up but are mostly used for milling slots and grooves etc, they can be used for lettering if you are happy with a flat bottomed groove.
    v-cutters are ideal for lettering but they used to be expensive so we used to hand grind a slotdrill to suit.
    Ballnose cutters can be used for slots with a radius bottom and internal radius in corners.
    Outside radius tool bits for obviously raduis on the edges of corners.
    Then there are other types like T cutters, flycutters and adjustable boring bars.
    A 1/4 inch or 6mm collet doesnt mean thats the maximum size cutter you can use as a lot of cutters have stepped up sizes.
    An endmill usually has 4 cutting edges and a slotdrill 2 or 3

    All these posts recently about cnc machines has really made me want to get one

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    500+ This must be a daytime job autocadplease's Avatar
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    Re: CNC bits ?

    I have a Bosch Colt on my CNC. I bought a 1/8x1/4 bushing collet from Lee Valley and use the 1/8" bits for my engraving and cutting. I bought some 1/8" bits from eBay and from Princess Auto.

    The best site for anything CNC is cnczone.com.
    Grant D.
    Nelson,B.C. Canada
    Win7 32bit, FSX, PM Boeing, TH2GO, GEX, VoxATC

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    75+ Posting Member davek's Avatar
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    Re: CNC bits ?

    Gwyn (Westozy) recommended this site for purchasing bits

    http://www.virtual-village.com.au/cnc-bits

    He states he has had good success with them. I have ordered some but they haven't arrived yet.

    I ordered .2 .3 .5 1.0 2.0 sizes.

    I cut out a panel last night using a 3mm (couldnt wait any longer to play) and while the 3mm bit did a good job on holes and shapes, the text was obliterated due to me choosing 5mm size text. I knew the text wouldnt work at that size bit but it was fun and amazing to see the router cut out your drawing.

    I am not sure what size bit for actual text, I amsure the cnc guys will be able to tell us, its fun experimenting though

    Good luck
    Last edited by Westozy; 01-03-2010 at 12:00 AM.

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    Re: CNC bits ?

    For engraving I use 0.2 mm V-shape 36.


    Regards, Wendy

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    75+ Posting Member Jylhami's Avatar
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    Re: CNC bits ?

    For europe, i buy my bits from sorotec.de
    Enrgaving 0,15-0,4 mm flat V-tip.
    For cutout 1,5-2mm 1-flute endmills for soft materials like plastic.
    For pocket milling 2-6mm endmills 1 or 2 flute.
    For Acryl there are some special bits to use.
    I have Kress 1050W router in my machine.

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    Re: CNC bits ?

    Autocadplease,, I have a quick question. I saw the 1/4" to 1/8" bushing adapter on the Lee Valley website and was wondering, when you use that , do you have to use a 1/8 collet as well or just place the bit in the adapter ?

    I'll be making a quick trip to Saskatoon to visit lee Valley and Princess Auto very soon.

    Thanks.

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    500+ This must be a daytime job autocadplease's Avatar
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    Re: CNC bits ?

    Quote Originally Posted by spitfire9 View Post
    do you have to use a 1/8 collet as well or just place the bit in the adapter ?
    You just use the adapter (which is a collet) when you want to use a 1/8" shank bit. When you do use it, make sure the split in the collet lines up with one of the splits in the routers collet. That way the reducer will tighten properly.

    Princess Auto has some nice little package of 12 different 1/8" bits that I always use on acrylic/plastics. Item No. 340007 - http://www.princessauto.com/surplus/...keyword=340007
    Grant D.
    Nelson,B.C. Canada
    Win7 32bit, FSX, PM Boeing, TH2GO, GEX, VoxATC

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    Re: CNC bits ?

    Hi all,

    I have turned up a piece of bright steel 1/4" diameter and cut a fine thread on it to accept a Dremel collet and nut. My 1/4" router now has a Dremel chuck for the 1/8th bits. The Dremel collet chuck and locknut are available as spares from the Dremel shop. My router is an Ozito PRG-621V which is ideal for CNC as it has onboard variable speed and is practically disposable at AUD$65.00 (US$55.00) I will make some more of these Dremel adaptors when I get some time shortly and add them to the Aerosim Solutions product list! The cutters from virtualvillage are great for machining plastics and I have engraved some aluminium with them quite successfully too.

    Most of these parts were cut out on the CNC...


    The A340 TQ nears completion!!!

    Regards, Gwyn

    737NG using Prosim737, Immersive Calibration Pro, Aerosim Solutions motorized TQ & cockpit hardware, CP Flight MCP & FDS SYS1X, SYS2X & SYS4X, FDS PRO FMCs, AFDS units & Glarewings, Matrix Orbital ELEC display, Pokeys Landing & Cruise alt display, Buttkicker Gamers, 3 x BenqMW811ST projectors with a Matrox Th2Go
    http://www.aerosimsolutions.com.au
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    500+ This must be a daytime job autocadplease's Avatar
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    Re: CNC bits ?

    Quote Originally Posted by Westozy View Post
    Hi all,

    I have turned up a piece of bright steel 1/4" diameter and cut a fine thread on it to accept a Dremel collet and nut.
    Never thought of that! What thread did you use?
    Grant D.
    Nelson,B.C. Canada
    Win7 32bit, FSX, PM Boeing, TH2GO, GEX, VoxATC

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