M. Moore
Titanium
- Joined
- Jun 8, 2007
- Location
- Vancouver Island, B.C. Canada
I need some advice on how to measure these very small angles on the teeth of cold saw blades that I sharpen for my own machines.
Currently I am just guessing but would like to know the accuracy of the angle of the grind. (hook angle) The machine does have a reasonably accurate angle gauge but there are a lot of factors and the grinding wheel is curved so it is a bit of a guess. Also the grinding wheel curve is done by hand so it can vary and the teeth are very small on the smaller blades with fine pitch.
I came across a post suggesting the use of a eyepiece magnifier with built in scale and looked into buying one as I think it will do the trick.
My question is do you think that this type of eyepiece will make for a very accurate way to measure the angle and what magnification would be best? There are several choices from 7x to 15x.
I was thinking that a 10x would be good but have to order online so can't test out the product before I buy.
Up until I came across the small loupe style magnifier I though I would have to measure the angle with an optical comparator but now I am hoping that the portable will work as I could just measure it while I am setting up the machine.
The hook angle is also measured in relation to the center line of the blade so I would need that centreline as a reference, which poses some problems with the blade on the machine? Any ideas?
Currently I have two sizes of blade that need sharpening, 11" and 16", tooth pitch ranges from 4mm to 14mm. The tooth height is usually about 1/2 of the pitch length.
Any help would be much appreciated.
Currently I am just guessing but would like to know the accuracy of the angle of the grind. (hook angle) The machine does have a reasonably accurate angle gauge but there are a lot of factors and the grinding wheel is curved so it is a bit of a guess. Also the grinding wheel curve is done by hand so it can vary and the teeth are very small on the smaller blades with fine pitch.
I came across a post suggesting the use of a eyepiece magnifier with built in scale and looked into buying one as I think it will do the trick.
My question is do you think that this type of eyepiece will make for a very accurate way to measure the angle and what magnification would be best? There are several choices from 7x to 15x.
I was thinking that a 10x would be good but have to order online so can't test out the product before I buy.
Up until I came across the small loupe style magnifier I though I would have to measure the angle with an optical comparator but now I am hoping that the portable will work as I could just measure it while I am setting up the machine.
The hook angle is also measured in relation to the center line of the blade so I would need that centreline as a reference, which poses some problems with the blade on the machine? Any ideas?
Currently I have two sizes of blade that need sharpening, 11" and 16", tooth pitch ranges from 4mm to 14mm. The tooth height is usually about 1/2 of the pitch length.
Any help would be much appreciated.