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Tool Vevor Drill Bit Sharpener Improved

Tool
So back to the grind...

The 20G wheel being 33% thicker allows wider bits to be ground, but pushes the axis of the grinding seat outward from the grinding wheel. In the image below the pointed rod is 14mm diameter.

1736705258139.png


So, options to handle a 20G wheel. Machine new motor hub that sits a further 3 mm onto the motor shaft, and new A and B tool blocks for the 20G wheel, and make a 20G tool setter to provide the additional projection on the bit that will be required.

Or make a new dedicated 20G machine. I'll design blocks in either case.
 
TorontoBuilder said:
So back to the grind...

The 20G wheel being 33% thicker allows wider bits to be ground, but pushes the axis of the grinding seat outward from the grinding wheel. In the image below the pointed rod is 14mm diameter.

View attachment 57718

So, options to handle a 20G wheel. Machine new motor hub that sits a further 3 mm onto the motor shaft, and new A and B tool blocks for the 20G wheel, and make a 20G tool setter to provide the additional projection on the bit that will be required.

Or make a new dedicated 20G machine. I'll design blocks in either case.
Click to expand...

NOPE.

The B tool block can't be set back towards the upright motor mount any further. The A tool block could have remained unchanged because the insert could be shifted outwards.


1736706900625.png


Moving the grinding seat location is not practical. Maybe move the motor base back instead. Or just make a 20G duo machine
 
So I finally put the grinder all back together and did some test grinds for fun.

I wanted to see how easy the grinder cut so I set a long projection manually and went to town on the web thinning...looks like I made a step drill.


20250112_160732.jpg


When I reassembled the machine I set the tool block insert as far back in the seat as it goes, when it is supposed to sit forward. I made the adjustment and it cuts great. It removes material very quickly.
 
Okay so update time

Yes I can order grinding wheels direct from the manufacturer at the same time as spare motors.

The wheels are $35USD each for the 13A, 13B or 20G. I dont know what they will add to the shipping cost but I'll assume 10 bucks each for now, so $65 CAD.
 
pic post #183 definitely hogging material, that's a good thing

Regarding mods (or maybe its already doable?) could you dress something like a single flute countersink? Basically like the primary grind of a drill but carried on for higher portion of circle section until it encounters the chip notch flute. I'm finding these vary by manufacturer, some are fully helical right around, some are helical for the first portion of relief & then held constant until the .chipp notch flute. Chip notch flute is probably bad terminology, whatever they call it. Anyway throwing the notion out there
1736787005362.png
 
PeterT said:
pic post #183 definitely hogging material, that's a good thing

Regarding mods (or maybe its already doable?) could you dress something like a single flute countersink? Basically like the primary grind of a drill but carried on for higher portion of circle section until it encounters the chip notch flute. I'm finding these vary by manufacturer, some are fully helical right around, some are helical for the first portion of relief & then held constant until the .chipp notch flute. Chip notch flute is probably bad terminology, whatever they call it. Anyway throwing the notion out there
View attachment 57799
Click to expand...
I think that there are easy mods that can expand grinding capability substantially. Especially with a bigger base
 
TorontoBuilder said:
I'm not sure if there is a difference and there is so much conflicting crap on ali I just dont know. They definitely have them marked differently. so thins may present a hiccup
Click to expand...

OK, the stones on my 13B are marked "13B CBN230" and "13B-B SDC230". I don't know how the 13A stones are marked nor what any dimensional differences are. But I can certainly measure mine if needed.

While $65 Cdn is a lot of coin for a wheel it's not unreasonable either. Especially when I look at the quality of the wheels. I think it's important to figure out and prioritize needs.
 
Susquatch said:
OK, the stones on my 13B are marked "13B CBN230" and "13B-B SDC230". I don't know how the 13A stones are marked nor what any dimensional differences are. But I can certainly measure mine if needed.

While $65 Cdn is a lot of coin for a wheel it's not unreasonable either. Especially when I look at the quality of the wheels. I think it's important to figure out and prioritize needs.
Click to expand...

I know, I'll add wheels to orders for those who want them, and I plan on buying one 20G because I will need it, but I'm not yet sure about the 13A wheel.

I think that I can get the cost well below aliexpress prices, but I wanted to provide a ballpark amount for planning purposes. I'll wait the week to finalize interest from people. I dont care if people wish to order or not, so please no one feel pressured to do so
 
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