How To Paper wheel won’t burr or sharpen

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Won’t sharpen

Joined
Apr 11, 2023
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7
Made MDF wheels on a 6 inch grinder there true and have used glue 220 grit can’t get a burr going used different angles pressure
So knives are still blunt I’m using cheap knives to practice and get a nice looking angle but won’t burr or polish to a sharp knife
Any advice would be great
 
Won’t sharpen said:
No 220 powdered grit
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Oh, powdered grit. I have no experience with powdered grits, but it could be that as you try to sharpen the grit gets worn out too fast to give you any results? Maybe try and glue some grit to a piece of MDF and sharpen your knife like how you would on a stone to see what happens? You can also use sandpaper to sharpen your knives.
 
master_nylo said:
Oh, powdered grit. I have no experience with powdered grits, but it could be that as you try to sharpen the grit gets worn out too fast to give you any results? Maybe try and glue some grit to a piece of MDF and sharpen your knife like how you would on a stone to see what happens? You can also use sandpaper to sharpen your knives.
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Ok maybe I have a low speed polisher with worn fine sandpaper I’ll try that thanks
 
Hmm well . . . What about wax? Mine require using a bit of wax over the grit, to prevent overheating and burning off the fine edge . . . ?
 
Sometimes homemade wheels aren't as rigid as they need to be. The MDF wheels that I have seen that worked really well were so find grained they looked like the old brown grocery sacks and they were as hard a ceramic wheel. No flex at all. You might look around here, there used to be a gentleman of great reputation that got a lot of folks on the paper wheel path.

Then of course, there is the Tube for a video or three: https://tinyurl.com/3dz658f4

There are guys that use those wheels at the gun shows I go to from time to time, and they can take a knife that is damaged and get it to arm hair shaving sharp in minutes. So practice, technique and materials seem to be the key.
 
Can you tell where on the edge stock is being removed? If not, You try coloring the edge with a sharpie to make sure you’re at the right angle rather than just hitting the apex (too obtuse) or the shoulder between primary and secondary bevel (too acute).
 
midnight flyer said:
Sometimes homemade wheels aren't as rigid as they need to be. The MDF wheels that I have seen that worked really well were so find grained they looked like the old brown grocery sacks and they were as hard a ceramic wheel. No flex at all. You might look around here, there used to be a gentleman of great reputation that got a lot of folks on the paper wheel path.

Then of course, there is the Tube for a video or three: https://tinyurl.com/3dz658f4

There are guys that use those wheels at the gun shows I go to from time to time, and they can take a knife that is damaged and get it to arm hair shaving sharp in minutes. So practice, technique and materials seem to be the key.
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jdlawson3 said:
Can you tell where on the edge stock is being removed? If not, You try coloring the edge with a sharpie to make sure you’re at the right angle rather than just hitting the apex (too obtuse) or the shoulder between primary and secondary bevel (too acute).
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Thankyou I’ll mark the blade and check
I’ve tried so many angles that I should have got lucky by now lol
 
Dump the MDF wheels and get yourself a good pair of Paper Wheels.
Not only can MDF wheels be downright dangerous (they can come apart at speed, comparable to a stone wheel), after some practice you will get much better edges on real Paper Wheels.
 
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