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blade sharpening Question

Started by backpacker, June 20, 2017, 04:00:28 PM

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backpacker

June 20, 2017, 04:00:28 PM
Recently I have noticed that when doing bandsaw blades there is a very..very slight "ridge" on the inside of the blade, or exit side of the grinding wheel.
Any thoughts as to why? maybe too fast  or too slow application of the grinder wheel, maybe too slow an advance speed of the blade by the sharpener?
and as the grinder wheel becomes smaller, actual grinder wheel surface speed goes up, does that affect the time that grinder should be in contact with the blade?
The amount of grind i have set at, is very light, enough to ensure the tooth face and backside are nicked by the grinder.
tks

ladylake

#1
June 20, 2017, 04:51:20 PM

Just normal, it's gone in the first foot of a log.   Steve
Timberking B20  18000  hours +  Case75xt grapple + forks+8" snow bucket + dirt bucket   770 Oliver   Lots(too many) of chainsaws, Like the Echo saws and the Stihl and Husky     W5  Case loader   1  trailers  Wright sharpener     Suffolk  setter Volvo MCT125c skid loader

drobertson

#2
June 20, 2017, 05:53:09 PM
A slight ridge is good!  sounds like your set up is spot on to me.  No ridge could possibly mean a more brittle blade, or not enough of a grind, not bad, just requires more rounds or a change in adjustments.  I'd leave it, if its sawing like you like.
only have a few chain saws I'm not suppose to use, but will at times, one dog Dolly, pretty good dog, just not sure what for yet,  working on getting the gardening back in order, and kinda thinking on maybe a small bbq bizz,  thinking about it,

Ga Mtn Man

#3
June 20, 2017, 06:03:33 PM
As the grinding wheel gets smaller the surface speeds goes down, not up.
"If the women don't find you handsome they should at least find you handy." - Red Green


2012 LT40HDG29 with "Superized" hydraulics,  2 LogRite cant hooks, home-built log arch.

drobertson

#4
June 20, 2017, 07:33:20 PM
Grinding can be a very humbling learning thing, it really is machining and learning the art, which it kinda is, takes time.  I say learn from your results and make it work for you. As my ole algebra teacher would say before every test, " time, patience, and endurance will be required,"  this runs true with just about every thing,
only have a few chain saws I'm not suppose to use, but will at times, one dog Dolly, pretty good dog, just not sure what for yet,  working on getting the gardening back in order, and kinda thinking on maybe a small bbq bizz,  thinking about it,

backpacker

#5
June 20, 2017, 09:01:04 PM
Evening Folks: Good to read that a small ridge is good, and they cut good, and as i think of it, I don't feel a ridge on the used ones.
Just never noticed it before and had to ask.
Good to read that someone noticed my up and down surface speeds were reversed:)
HA! hate to do that on the skidder...
Keep your sticks on the ice...
Tks for the replies

Kbeitz

#6
June 20, 2017, 09:16:46 PM
It comes from malleable iron. You get it a lot in softer metals when drilling.
Collector and builder of many things.
Love machine shop work
and Wood work shop work
And now a saw mill work

bandmiller2

#7
June 21, 2017, 06:57:12 AM
Its called a burr and is common on all sharpened edges, it can on knives be stropped to remove. On bandsaws its soon removed by the log or cant. Frank C.
A man armed with common sense is packing a big piece

D6c

#8
June 21, 2017, 09:04:20 AM
In this WM sharpener video, at about 20 seconds in, it shows an arm with a carbide blade being positioned against the saw blade.  I assume the idea is for it to scrape the burr off....although through the rest of the video they weren't using it.

https://www.youtube.com/watch?v=QNgDq1Tebng
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