Making a Drag knife

Making a Drag knife after Brian Oltrogge plans.
Link to the plans! www.grunblau.co...
Credits
Music - ”Cherubs” by Josh Woodward. Free download: joshwoodward.com/
creativecommon...
and Fusion 360

[@rhysun]

If you're using GRBL to control your machine, the excellent bCNC command sender software has a very useful drag knife plugin.

[@CNCSwede]

Rhys Owen I Will check that out 👍😊

[@UzunKamis]

Great work. Jst a note, the blade had a hole to fix it in the position.

[@Simsy5861]

Hi CNCSwede. I'm very curious about what coolant you are using whilst machining this project. I have the same air tube/coolant setup as your's, but have never found the right coolant to use and have struggled to get the air pressure and the coolant metering right. Can you help with some advice? Cheers!

[@CNCSwede]

Geoff Sims Hi! I use something that in Sweden named T-Red it’s for Trangia camping burners and as frost protection in washer fluid in cars and so on. I think it’s Denaturated alcohol in English. To limit the amount of alcohol, I have put a small valve on the hose to the bottle.

[@Simsy5861]

Hi. Thanks so much for your reply. I think T-Red is available here in Australia. I'll give it a try. I'll put in a valve as well. Thanks again. Cheers!

[@AndrewFuTheOne]

Hi CNCSwede! I was wondering if you used any special program to account for the offset? If you didn't, how accurate was the cut compared to drawings?

[@ViorelStolea]

Is that a spring in between the plates that hold the ball bearings? I purchased the plans but there's no mention of a spring anywhere :)

[@CNCSwede]

No. it's a washer spacer to lighten the pressure of the center on the bearings.

[@ViorelStolea]

@@CNCSwede Thanks! I've seen some other designs with a spring - I thought you adapted it to the Grunblau :)

[@ishubansal265]

@@ViorelStolea can you send me the designs

[@danielricaud3783]

Hello, what software do you use for knife offset? Thank you

[@buchnoun]

nice job as usual, what kind of aluminium did you use to cut the parts?

[@CNCSwede]

buchnoun I used this www.motedis.se/shop/Ramaterial-Aluminium/Aluminium-platar/Aluminium-platar-inte-laminerad/Aluminiumplat-Standardmatt-10/Aluminumplat-mindre-format-10mm-tjock::999991123.html

[@CNCSwede]

10mm DIN EN AW-5083 Al Mg4.5 Mn0.7

[@ildealbertosandatecabrera8193]

Hello... could you please to quote this system

[@simoncueva2200]

Donde la compro la cuchilla

[@CNCSwede]

si te refieres a la hoja del cuchillo, están disponibles en la mayoría de las ferreterías.

[@zulqarnainjabbar2345]

How is blade is control, by motor or it changes its direction as head moves to that direction

[@CNCSwede]

zulqarnain jabbar The blade is a little offset, making it turn when the cutter changes direction

[@zulqarnainjabbar2345]

Thank you i am DIY for a 2D Printer so i was thinking if i out blade like that then will it work

[@zulqarnainjabbar2345]

where can i get plan(drawing) to make

[@CNCSwede]

zulqarnain jabbar The link can be found in the description of the video above. Press the down arrow to see the description.

[@menanasry2645]

اين تباع

[@markvreeken]

Brian does not appear to be contactable

[@HidekiShinichi]

Probably would not work on a 3d printer. ;/

[@hieunguyendanh3273]

hello, excuse me. i'm student. now, i go to make a drag knife to do graduation project. Can you give me this drawing? thanks you ! pls.

[@CNCSwede]

Hieu Nguyen Danh No I can't. But you can buy Brian a beer then you get the plans. www.grunblau.com/DragKnife.html Cheers Eric

[@hieunguyendanh3273]

thanks you ! how much is it?

[@CNCSwede]

Hieu Nguyen Danh it's $5 for the plans

[@samuelfranca.9287]

m.kzbin.info/www/bejne/bZSlmoOCeLCDmKc

[@gerryhanley5136]

i got them for nothing