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DanielIt
Registered User Joined: 11 September 2013 Location: Italy. Status: Offline Points: 273 |
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Posted: 15 September 2014 at 10:05am |
Hello dear friends. We had a sunny weekend here on Italy and i got to work some more cutting some wood for 2 new HD15.I use an upper bearing router bit of 20mm to cut the holes after a mold,and just want to ask is there a method to clean the router bit? What i mean by that is,at first the bit was new and eated pretty well the ply,i am going 5mm deep 4 times to clear the 18 mm ply.After some work the bit is still cutting but starded to smoke,i had to use compresse air to cool it.By touch is does seems it is not cutting anymore,more like ripping off the wood,and turned to brown colour.I have done like 6 handles and 2 patch panels and the bit is not cutting anymore. In my opinion the glue that holds the ply together is burning and attach to the bit.Is there a way arround that or something i am doing wrong?
Thank's for any advice. Edited for spelling. Edited by DanielIt - 15 September 2014 at 10:07am |
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Measure twice...cut once.
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Shortrope
Young Croc Joined: 08 July 2013 Location: Ireland Status: Offline Points: 1232 |
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Sounds like a blunt bit. What brand cutter is it??
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My Tinnitus is coming along nicely!!
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Hille
Registered User Joined: 19 August 2012 Location: Beljam Status: Offline Points: 27 |
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DanielIt
Registered User Joined: 11 September 2013 Location: Italy. Status: Offline Points: 273 |
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I use a cheap no mark bit from febay.Where do you guys get the bits from?
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Measure twice...cut once.
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odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
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Sounds like you've blunted it, probably caused by spinning too fast and then not cutting enough wood fast enough making small cuts per rotation. Basically rubbing off the wood instead of cutting it. If you have a variable speed router then perhaps best to reduce the rpm next time?
Router bit RPMs and feed rates are a complicated business, take my advice with a pinch of salt as I'm no pro but I have been reading a lot recently regarding use of various cutting bits in CNC tools |
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Centauri
Old Croc Joined: 29 November 2004 Location: Newcastle Aus Status: Offline Points: 1792 |
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The cheapo bits will blunten & burn quickly - better to spend the extra getting decent branded bits.
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SamV
Old Croc Joined: 21 October 2008 Location: London Status: Offline Points: 8707 |
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If it's a HSS bit, it can be resharpened, they start sharp but blunt quickly but then can be resharped. TCT aren't as sharp but stay sharp longer but resharpening is a ball ache.
I get all my bits from Wealdon Tools. They are tool geeks. |
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DanielIt
Registered User Joined: 11 September 2013 Location: Italy. Status: Offline Points: 273 |
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Thank you Sam.I just placed an order.Hope they come quick as i need to cut some more wood.:)
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Measure twice...cut once.
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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Decent tools pay for themselves. No point in buying crap, especially with drill and router bits.
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Earplugs Are For Wimps!
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studio45
Old Croc Joined: 16 October 2007 Location: United Kingdom Status: Offline Points: 3863 |
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I use CMT 2050 cleaner for my bits, here http://www.screwfix.com/p/cmt-cmt-2050-blade-and-router-bit-cleaner/93527
It gets everything off if you soak for a few minutes and then scrub with a toothbrush. But do take the bearings off bearing-guided bits first as it will strip the lubricating grease from inside and damage them. You can resharpen TCT (tungsten carbide tipped) bits quite easily. You just need a cheap set of diamond files - ordinary whetstones or tool steel files will not touch it. The basic technique is NOT to file on the cutting edge but rather grind back the flat surface of the carbide insert, so that the blunted edge is restored to sharpness. There are videos on Youtube demonstrating the technique.
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Studio45 - Repairs & Building Commotion Soundsystem -Mobile PA
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RobinMatrix
Young Croc Joined: 23 August 2013 Location: Kidderminster Status: Offline Points: 567 |
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If it helps ... in 18mm ply on our CNC we run a single pass, full depth at around 150mm a second @ 18,000 RPM (thats 9m a minute) ... ideally, we would run double that feed rate, 300mm a second, but our servos are not strong enough to push it that fast. The faster you can push it, the longer the tool lasts ... we can cut *at least* 50 full sheets on a single cutter at that speed/feed without sharpening ... the tooling guy wants us to to run 20m a minute at 18,000 RPM for longest life. Small passes at slow feed rates are the worst thing for cutter wear. Make chips, not dust. |
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TONY.A.S.S.
Old Croc Joined: 21 February 2007 Location: United Kingdom Status: Offline Points: 6878 |
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Trend is an old Brand and a good one to use. If you use a lot of stuff, it's important to find a firm that sharpens them. I carry around 40 cutters and 3 big saw blades, so definitely need a sharpening service. I've used the same firm from day on.
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