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how to get 10 degree grind using a KMG?
- Thread starter blgoode
- Start date
Means I am thinking in the right frame of mind...:thumbup:
- Joined
- Jun 2, 2007
- Messages
- 1,354
and if ya really wanna get crazy, grind edge down with a jig and have the belt running upwards so the blade doesn't get sucked into the jig !
- Joined
- Sep 27, 2004
- Messages
- 3,041
You know, has anyone ever actually had a belt grab a blade grinding edge up? I know i posted before but here's what i've done on a bunch of blades to set the rough bevels before normal grinding and never had a problem:
-Take a 2' long section of angle iron
-Drill and tap a hole about 1" down along the upright.
-Thread a bolt through with a nut to keep it tight.
-Only have the bolt come through about 3/4 the thickness of the stock you'll be grinding.
-Place the spine of the blade you are grinding onto that bolt as a rest
-Vicegrip the blade against the upright.
-Angle the platen towards you at whatever angle you need for your bevel.
-Hold the ends of the angle iron like handles to move the blade left-right while maintaining downward pressure.
I've never felt the belt try to grab the blade, never had it grab and never felt like it even wanted to grab so long as youre not pushing unevenly into the belt. I've hogged blades with a 50 grit belt and pushed so hard the blade actually went red (not advised) and never felt even close to dangerous compared to any buffing i've ever done.
Geometry-wise I dont see the platen being angled towards you as any different than it being upright and you angling the blade into it. The same angle exists between the blade and the platen no matter how you are grinding. if you were ultra paranoid, all you'd need to do is keep the platen at 90 degrees, thread bolts into the bottom of the angle iron and screw them in to raise the back of the angle iron to angle the blade into the platen.
Man, did i just tell people how to make a grinding jig? I do not condone using jigs to grind blades, for the record.
-Take a 2' long section of angle iron
-Drill and tap a hole about 1" down along the upright.
-Thread a bolt through with a nut to keep it tight.
-Only have the bolt come through about 3/4 the thickness of the stock you'll be grinding.
-Place the spine of the blade you are grinding onto that bolt as a rest
-Vicegrip the blade against the upright.
-Angle the platen towards you at whatever angle you need for your bevel.
-Hold the ends of the angle iron like handles to move the blade left-right while maintaining downward pressure.
I've never felt the belt try to grab the blade, never had it grab and never felt like it even wanted to grab so long as youre not pushing unevenly into the belt. I've hogged blades with a 50 grit belt and pushed so hard the blade actually went red (not advised) and never felt even close to dangerous compared to any buffing i've ever done.
Geometry-wise I dont see the platen being angled towards you as any different than it being upright and you angling the blade into it. The same angle exists between the blade and the platen no matter how you are grinding. if you were ultra paranoid, all you'd need to do is keep the platen at 90 degrees, thread bolts into the bottom of the angle iron and screw them in to raise the back of the angle iron to angle the blade into the platen.
Man, did i just tell people how to make a grinding jig? I do not condone using jigs to grind blades, for the record.
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