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ArborOdyssey

Any ideas on how to use a hand-file (5/32") to sharpen a 4" grinder-disc ("Lancelot" type, a 4" angle-grinder disc that's go 22 chainsaw-teeth)

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After a couple years' of carving my bonsai's deadwood with this as my go-to for 'roughing-in' cuts (I usually work w/ sizeable bonsai so lots of wood can need removal from a single tree), I've since learned how integral chain-sharpness is and that's w/ my real saws (heck I've begun using cheaper chains - "Trilink" is the brand I think - simply so I switch chains more often, can rarely get a client or homeowner to think sharpening on-site is anything more than "You didn't sharpen before getting on-site like you should've" so my thinking is to have extra chains so I can always have a new chain or a sharp-chain since, w/ extra's, I can just sharpen 2-3 of the used/extra ones and then go to a job and just swap chains 2-3x in a day if I want and it'd be far easier than trying to deal w/ on-site sharpening!)

 

SOooooo....how on earth do you guys sharpen these 4" chainsaw-discs for angle-grinders?  Am close to just grabbing my 5/32" file in one hand, the chainsaw disc in the other, and justtt work my way through the ~15-20 teeth on it but, being new & seeing a sub-forum like this (wish I'd found this sub years ago before I ever even pondered climbing/cutting as a profession, have been carving bonsai-deadwood nearly half a decade now :) ) so wanted to ask, will not bother w/ more Q's here will be going through all the old threads I expect this'll be a treasure-trove of information for me :D

Thanks a ton for any advice on this one, am able to fully clean-out and re-lube it, am thinking it'll be simple-enough to take its rakers down a lot, but since regular tootth-sharrpening is so angle-dependent I'm afraid I won't be able to be anything near consistent/uniform as I go around that 4" chainsaw disc's 22 teeth, will probably have angles from 20deg to 45 and just make it want to pull but reality is I need it very precise because of how it's used..

Edited by ArborOdyssey

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Hi, I have in the past sharpened these by simply gripping it in a vice by the centre using two sockets as spacers and sharpen as normal whichever is your preferred way... there's loads on youtube about sharpening.

 Personally I use a dremmel type tool with a diamond burr of the correct size....but if you use a file mounted in a guide it shouldn't be to hard to get the angle correct, give each tooth the same number of strokes with the file it should keep the teeth evenish and I'm sure with practice you'll be able to get it fairly good, cheers. 

 

If it was me it would be my knuckles I'd be worried about🤨

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I've read so many threads of these Lancelot discs destroying people's hands/fingers.
Best advice I could offer is bin it and invest in a chainsaw. Put a carving bar on it and it will be infinitely better and so much safer

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Hi I have one of those I think it’s called King Arthur’s Wheel ,and it’s bloody deadly there are loads of pictures of horrific accidents with them ,but to your question mine comes apart so if yours is the same you should be able to clamp it in a vice and sharpen like an ordinary chain ,if it does come apart make sure you remember what way round it all goes as it took me ages to put mine back together ! I have one that is a solid disk with chainsaw cutters shaped into it ,they are both sketchy and spend most of their time on the shelf I agree with Simon ,throw it on the shelf and buy a carving bar ,and keep your fingers 

Cheers Mark 

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