Drag bit cnc

Drag bit cnc DEFAULT
  1. 05-23-2015, 06:21 AM#1
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    Default diamond tip engraving

    I'm about to order a 90 degree diamond drag engraving bit blade for cnc drag engraving. Is anybody familiar, does anybody know if successive 'cuts' will produce / produce a deeper engraving? Or should I use a 120 degree bit? Thank you

  2. 05-23-2015, 06:27 AM#2
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    Default engraving

    Quote Originally Posted by mofosheeeView Post
    I'm about to order a 90 degree diamond drag engraving bit blade for cnc drag engraving. Is anybody familiar, does anybody know if successive 'cuts' will produce / produce a deeper engraving? Or should I use a 120 degree bit? Thank you
    .
    been my experience diamond breaks off easy. usually carbide is hard enough. depth control or a spring loaded engraver is needed. if even .005" off it is easy to snap point off
    .
    i made s holder to hold dremel electric engraver points which are relatively cheap
    .
    deep lines i just use a rotating ball end mill

  3. 05-23-2015, 07:39 AM#3
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    My drag engraving is all done with manual machines. When I want a wider line, I go over the engraving multiple times. I find the diamond points fragile and easy to damage if excessive pressure is used, or if one strikes an object while moving the stylus out of the way. I think that a spring or weight loaded stylus would be necessary for CNC drag engraving. Try multiple passes to see the effect.

    Jim
    Jim

  4. 05-23-2015, 07:56 AM#4
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    A bit off subject, but I use the small diamonds called Phono Points to engrave numbers on the end of hard ejector pins. Do it in the CNC, with spindle at 2000 or so. Shallow passes, they last well.

  5. 05-23-2015, 12:26 PM#5
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    Spring loaded diamond drag Engraver are awesome. 120 for AL or light lines [marks] in others. 90 for steels. I had to engrave a lot in tool steel (2000 pieces) and used 400ipm plunge and 100ipm drag for letters 0.05" tall and had great resulds.

    AL tends to leave a bur if going deeper, but the 120 helps some... not entirely though

  6. 05-23-2015, 12:27 PM#6
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  7. 05-23-2015, 01:03 PM#7
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    Quote Originally Posted by PriddyShiddyView Post
    So did mine. 120 degree with their spring loaded holder. Beautiful crisp engraving. I plunge at 250 and feed at 120 with the spindle off or at 50rpm depending on how lazy I'm feeling. Some of the best customer service I've had. They made a special trip to the post office to ship it to me USPS instead of UPS. UPS does their very best to screw Canadians at the border.
    Jordy

  8. 05-23-2015, 02:05 PM#8
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    In 7075 aluminum, spring loaded drag engraver multiple passes using CNC, with or without rpm?????? Will multiple passes give more depth?
    So I'm understanding that a 90 degree diamond tip drag engraver can produce extremely fine and shallow lines that can be rubbed out = not desirable.
    I've had some experience with the .005 rotary tip engraving bits.....results ranging from excellent to ok. Ok occurs when tip breaks mid job run. Looking for consistency

  9. 05-23-2015, 02:27 PM#9
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    I've used them in steel too. Whichever angle you get you won't be rubbing it off with anything but abuse. Just use a strong spring in the engraver and you'll be fine
    Jordy

  10. 05-23-2015, 04:31 PM#10
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    90 degree is deeper than 120 since the force is more focused on 90 so more psi

    You can adjust the spring rate and tension and depth. I ended up getting some 2x stronger than their strongest springs for the tool steeluploadfromtaptalk1432416598287.jpguploadfromtaptalk1432416689271.jpg

  11. 05-23-2015, 10:02 PM#11
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    Where did you purchase the spring loaded engrave and diamond bits from?

  12. 05-24-2015, 10:47 AM#12
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    Purchased from George race on eBay, 1/8" spring loaded brass

  13. 05-27-2015, 02:35 PM#13
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    Quote Originally Posted by mofosheeeView Post
    Purchased from George race on eBay, 1/8" spring loaded brass
    Can you post a link?

    Ken

  14. 05-27-2015, 05:01 PM#14
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    I grabbed my diamond drag from Tormach. Was right around $65 with the tip, holder and extra springs. Most likely made overseas unfortunately but it works well.

    I know its advised against but I run mine with the spindle stopped. Tried spinning and it left a swirl pattern on everything. Multiple passes help with depth but if you need something "deep" I wouldn't use a drag engraver.

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Sours: https://www.practicalmachinist.com/vb/

This Diamond-Tipped Bit Allows You Engrave Steel, Metal, Glass, and More with Your CNC Router or Mill

diamond-engraving-bit-product-shotI stumbled across this diamond drag engraving bit when I was looking for some other cutters for my CNC. This bit allows you to engrave hard materials like stone, steel, and glass, or soft materials like plastic, aluminum, and brass. You can even score glass for cutting.

The special bit measures 3-3/4″ long and doesn’t spin like a regular bit. It chucks into a 1/4″ collet and is designed to be dragged across your work material by the CNC – kind of how you would use a manual scriber.

Yes, that’s correct – your spindle must be OFF when you use this drag engraving bit.

The diamond tip is spring-loaded, to apply constant pressure on the material. Since it is spring-loaded, the bit can compensate for a waste board or materials that aren’t perfectly flat. As it is dragged, the bit will engrave a line approximately 0.005″ wide.

diamond-engraved-glass-mirror

When you buy the bit, you get the spring-loaded holder, high and low pressure engraving springs, the 120° diamond tip, a hex wrench for replacing the tip, and detailed instructions on how to set up your CNC. You can also purchase a 90° tip separately, which is recommended for engraving coated materials.

The bit will run you $180 at Widget Works Unlimited and the cheapest shipping method listed was about $9. There’s also a 1/2″ shank version for the same price.

Buy Now

If you are curious about seeing a bit like this in use, check out this video from Jim McPherson. He’s using a similar diamond drag bit to engrave a name on a knife handle. Skip ahead to about 2 minutes if you just want to see the bit in action.

Sections: CNC Machines, Made in USA, Power Tool AccessoriesTags: CNC

Sours: https://toolguyd.com/cnc-diamond-drag-engraving-bit/
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One of the cool things you can do with a CNC machine is engrave metals and hard plastics using a drag bit, which is a pointed bit with a cheap, industrial-grade diamond. Unlike normal CNC bits, a drag bit doesn't spin while it works. Instead, it presses against the material as the machine drags it along the surface. The results look really cooland it's useful for engraving items like Zippo lighters

Unfortunately, drag big holders are too expensive (over $150) for most hobbyists that aren't using them to bring in business. Interestingly, the bits themselves are cheap (~$10). So I set about to make a budget-friendly holder.

My first attempt used a 1/4" aluminum tube capped with a small washer to prevent the bit from falling out. A piece of plastic goes between the spring and bit. The tube was capped with a screw to allow the bit to be replaced.


I put the entire tube in the router as though it were a 1/4" CNC bit and turned the router off to prevent spinning. A couple samples in scrap acrylic yielded a mixed success. The general shapes are visible, but the tube was too long with too much flex.


I reused the design from my dust bootto mount a larger support to the machine. The length of wood prevents flexing.


A thumb screw holds the tube in place. In this picture, you can see how the washer allows only the tip of the drag bit out. It lacks the vertical give of a professional holder, so it only works on flat  work surfaces.


The new tests are much sharper! This is the level of quality I was striving for. You can see how the cross hatch pattern looks less scribbly.


My first project with the new drag bit was to make a replacement piece for a board gameI enjoy. The original game piecewas large, flimsy, and blocked that players' view of the spaces behind. For scale, the green bug on top is about the size of a quarter.
Sours: http://perryprojects.blogspot.com/2017/06/cnc-diamond-drag-bit.html
Hot Sauce #2 - Diamond Drag Bit for CNC
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  1. 07-10-2018, 9:05 AM#1
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    Diamond Drag Bit Recommendations

    Been doing some Plexiglas signs and mostly use a tapered ball nose bit to etch the surface. I have seen some video's of people using a diamond drag bit.

    Something along the lines of the Widgetworks Unlimited Diamond Drag Engraving Bit. It is 179.00 on their web site.

    If anyone has any experience with this can you answer the following:

    I have Camaster Signpro with ATC

    1. How long do the bits last if I were to solely use them on plexi?
    2. I believe they are spring loaded? Will this work with the ATC option of a Camaster?
    3. 120 deg vs 90 deg bit: which do you prefer?
    4. How deep do you set the z axis to apply enough pressure on the material?

    I know there are cheaper diamond drag bits, throw away so to speak. Does the spring action and replaceable tips make this a smart choice?

    Thanks

  2. 07-10-2018, 9:22 AM#2
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    Subscribing...because one of this is on my list for acquisition, too. Strangely enough...or not so strangely...available on Amazon.
    --

    The most expensive tool is the one you buy "cheaply" and often...

  3. 07-10-2018, 9:48 AM#3
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    Hey Jim,

    Yea I saw they are avail on Amazon as well. Same price as their own website! Looks like their entire product line is avail...

  4. 07-10-2018, 11:20 AM#4
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    Yea, there's not much you can't get from Amazon, although it's important to always compare prices anyway. I did just score the Donek Drag Knife from Southeast on sale less the Camaster owner discount...but I believe you already have that function on your SignPro, if I'm not mistaken. I can see a need for the diamond drag for some "award" type things I'm contemplating offering.
    --

    The most expensive tool is the one you buy "cheaply" and often...

  5. 07-10-2018, 11:43 AM#5
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    I purchased a WidgetWorks Diamond Drag Engraving Bit about 8 years ago at a ShopBot event. It appears to be a 90 degree bit but there aren't any specifications on the direction sheet. I have only used it twice to engrave small brass labels for some portrait paintings.

    1. I don't know how long it will last as I haven't used it enough to determine its lifespan.
    2. Mine is spring loaded but I don't have an ATC.
    3. Since this is the only drag bit I have ever used I have no comparison information to share.
    4. The instructions say to start your test depth at 0.125" and increase/decrease the depth as needed up to 0.500" max depth. Starting feed rate is suggested to be at 0.5 inches per second.

    Its been many years since I used this bit so I can't remember what settings I used. I can say that even though it took a long time to engrave the small brass labels the quality was pretty good but I wouldn't want to use it very often because it was so slow and using a CNC machine with a gantry is a far cry from using a rotary engraver which is the preferred machine for this kind of work. For acrylic materials I use my laser engraver.

  6. 07-11-2018, 11:34 AM#6
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    Well, does not appear too many people use this bit...

    One of my concerns when using a standard drag bit, is the spindle.

    My CNC did not come with a touch plate, and from what I've gleaned this is because of the ceramic bushing in the spindle might have an issue with the pressure... Hence applying pressure with my spindle and not using a spring loaded drag bit might be an issue!

  7. 07-11-2018, 2:13 PM#7
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    I got one from this guy on ebay, don't remember the angle, it was only $40 back then.

    I use it to scratch layout lines on pearl inlay for hand engraving, works great for me.

    I think all these tools are going to be spring loaded, they would never survive the cutting forces as part thickness varies. The axial pressure on mine is minimal, can't imagine it damaging spindle bearings.
    Last edited by Keith Outten; 07-12-2018 at 8:35 AM. Reason: Removed link to ebay

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Bit cnc drag

  1. Hello all
    While I wait for the new CNC machine been made by JazzCNC I'm watching tons of various cnc vids on youtube every night with excitement :)
    Last night I came across diamond drag compression bit mounted in the spindle, (spindle turned off) then just drag around to etch glass or stone etc..
    My question is.. Is this bad for the spindle and mount assembly as your basically pulling it about with a force against it?
    If not.. cool as it looks quite fun.
    Cheers
    Last edited by jmac80; 03-04-2018 at 04:41 PM.


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  3. Off course.. mount it to the z axis.. makes sense and now you say it.. so obvious :)

  4. I’ve just recently started using one of these engraving carbon is so much easier quicker and cheaper.

    I only put a Z depth of .75 meaningless I no because it depends on spring tension.

  5. What one do you use mate?
    I see this USA one with 1/2 or 1/4 shank for about $180.. then a UK based one for about £45..
    Is the usa one just a fancy "Made In the USofA" sticker adding
    £100? :)

    $180
    http://www.widgetworksunlimited.com/..._engrv-500.htm

    or

    £45
    http://www.dragengraving.com/
    Last edited by jmac80; 02-04-2018 at 03:59 PM.

  6. I actually got mine from the good old US of A but was £56 if I recall from this seller, I’ve got a new diamond saved just in case.

    https://rover.ebay.com/rover/0/0/0?m...2F292371269198

    But that’s pants down price for what I’m doing it does the job just fine, I’m only engraving logos and my RC name on parts.

    I used to use a normally engraving bit but carbons tolerances of +-5% means engraving was a ball ache, I only engraved .1 deep so some parts would get missed that’s when the ball ache came in I’d need to re do those missing bits

    Engraving carbons only braking the resin so not a great deal of load.



    Shows up real nice when you add some colour


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  8. Oh man that look's sweeet
    What do you use to add colours, just spray paint then wipe off glossy surface instantly with maybe a bit of masking..?

  9. Cheers


    I just used a sharpie pen colour then wipe off then keep doing it till it’s nice and clear, then used a Q tip dipped in petrol to get any off that dried before I wiped off

  10. simple but effective :)
    Only thing with sharpies is life span, wife uses them on jewellery she hand stamps.
    bit of masking and airbrush maybe the thing to try.
    Have you ever tried laser engraving with your cnc router? also looking at them 4w laser addons and they look quite fun s well :)

  11. I only really make them coloured for sales pictures mate

    But depends what parts will determine life it’s rc related parts gas rc, so the front and side parts stop on, the rear behind the engine if the exhaust seal goes then that prays shite all over.

    We’ve just got a laser engraver at work and keep forgetting to bring in some carbon to test

  12. The Following User Says Thank You to Dean jeffery For This Useful Post:


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Machinists Network
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Engraving a brass plate with a WidgetWorks Diamond Drag Engraving Bit and an AVID CNC Router
Spring loaded diamond  drag engraving bits for cnc mills and  routers
Our diamond tip Drag engraving bits are an economical way to engrave a variety of materials on your cnc mill or router. Whether a desktop mill, mini mill or fullsize mill or router. Our engraving tool is great for Taig , Tormach , Grizzly G0704 ,  Seig mills and all others where a 3/8" shank is acceptable. Works great with the  cnc engraving software  in Vectric , Bobcad , Dolphin cad cam , and any other  cad or cam software that has engraving capability. Unlike a standard engraving endmill, this Tool drags across the surface with its spring loaded diamond tip.
Whether a production shop or a Hobby user for over 10 years our tools have fit thousands of customers engraving needs. From trophy companies, guns and AR15 parts , and part manufacturing all use our engravers to high production and high quality work.
  • Spring loaded design
  • Engraves uneven surfaces
  • Great value for shops or Hobby use
  • Replacement tips available
  • 3/8" or 1/4" shanks available
Engraving bit tools for cnc mill, mini mill and router PATENT PENDING
Copyright 2008 - 2021 engravingbit.com
CNC engraving tool for  mill, mini mill and routers
CNC Drag engravers , CNC digitizing probes , automatic tool setters control relays and CNC  cameras
We are closed for shop renovation until 10-24-2021. Orders will ship on this date when we return. thank you
Sours: https://www.engravingbit.com/

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