Equal chainsaw cutter lengths.

Gautama

I’ve seen a few videos on YouTube of guys sharpening chainsaws, and measuring the lengths of each cutter with a digital calipers, to ensure the cutters are the same length.

I’ve tried doing the same but I’m wondering what margin of variance is acceptable?

For example, the longest cutter I have is 4.61mm. Most cutters are 4.40mm and the shortest is 4.28mm. The wisdom is that all cutters must be the same length. Does this mean all cutters MUST be 4.28mm, or is there an acceptable margin of variance, say 5%?

Assuming 4.40mm is the average the +/- 0.22mm is acceptable, then anything between 4.62mm and 4.18mm should be fine?

zetecescort

I'm along way from a pro logger but always just looked them over by eye. once there was none noticeably different to any other I was happy.

Gautama

Yeah, I think you’re right, using a digital calipers down to the one hundredth of a mm is a bit German.

I did find a very handy one online, simple and cheap. A small bolt with two nuts. Eyeball for the smallest cutter, use the bolt and nut to meausure (second but to lock the position), then file each cutter until this diytool fits.

http://drivelink.blogspot.ie/2008/05/nuts-bolts-of-measuring.html?m=1

Cheap, fast, simple and sufficiently accurate.

wayoutwest

Handy tip Gautama - tried it out today and its a lot less fiddly than using the calipers. Any similar tricks for a bar dressing tool ? - at the moment I'm using a large course file g-clamped to a set square and its a bit wobbly and tricky to use .

aphextwit

wayoutwest wrote: »

Handy tip Gautama - tried it out today and its a lot less fiddly than using the calipers. Any similar tricks for a bar dressing tool ? - at the moment I'm using a large course file g-clamped to a set square and its a bit wobbly and tricky to use .

Oregon bar dressing tool is good imho.

wayoutwest

aphextwit wrote: »

Oregon bar dressing tool is good imho.

Yeah...i was trying to save €30 , but i think it would be a good investment. Did you find the fine flat file that comes with it ok or did you need the course file to 'get anywhere' with leveling un-even rails?.

aphextwit

wayoutwest wrote: »

Yeah...i was trying to save €30 , but i think it would be a good investment. Did you find the fine flat file that comes with it ok or did you need the course file to 'get anywhere' with leveling un-even rails?.

Cannot post link as new user here but abbeypro.co.uk have cheapest version I have seen. £6.49

On weekly maintenance for Chainsaw use of two fuel fills per day, standard file good. Users also mention using large flat file or better again a diamond file as alternates for dealing with hard burrs. Oregon leaflet mentions their own diamond file I cannot find but there is a Sugihara diamond file for the job on website of Chainsawbars.co.uk. This company has good YouTube videos and I recommend the relevant bar maintenance one.

The latest replacement file for the Oregon bar rail dresser came with a directional arrow which is an improvement for the unskilled operator. Originally there was a bit of frustration until the light dawned that it was directional dependant and the file would have to be changed around in the holder when switching sides.

wayoutwest

Many thanks Aphextwit - very helpfull info.