DIY OD Grinder fixture, For the surface grinder- maybe

[Janderso]

What a lazy day! The weather is perfect.
Spent a little time in the shop. I got the first side done.
Note to self. When you have a .001” fit, it will shrink the ID a bit.
I’ll have to lap the last .0006” or so to get that smooth perfect fit that I had when I fit the spindle to the bushing in the lathe.
Tomorrow I’ll finish this part of the project. I know fitting bushings is machinists class 101. It’s still a bit finicky.
Oh and the other thing I thought while I’m chewing up this beautiful brass, trepan. Next time….

 

[NCjeeper]

Looking good. I need to get back on mine. I may have to do some of your mods if you end up liking them.

 

[Janderso]

Looking good. I need to get back on mine. I may have to do some of your mods if you end up liking them.

I’m struggling with a way to deter grinding dust from entering the bore.
I’m leaning toward felt vs. o-rings. I think the felt ring would be an easier option.
If I choose the o-ring, I would cut a groove into the brass allowing for 20% compression.
See why the felt on both ends is the easier solution??

 

[Janderso]

Looking good. I need to get back on mine. I may have to do some of your mods if you end up liking them.

I should mention, I saw a video where someone used 3D printed pulleys and an oring drive. The oring was cut to length from a roll and super glued!
I have a couple buddies with 3D printers and they know CAD! Not me

 

[f350ca]

I’m struggling with a way to deter grinding dust from entering the bore.
I’m leaning toward felt vs. o-rings. I think the felt ring would be an easier option.
If I choose the o-ring, I would cut a groove into the brass allowing for 20% compression.
See why the felt on both ends is the easier solution??

Air ?
I built this grinder for my thickness planer blades. The holder slides on linear ball bearings. Can't see it in the photo but I apply a couple of psi air into the housing. There are no mechanical seals, the slight air flow keeps the grit out. Been working great for a few years now.
Need a beter grinder motor on it though, that Chinese piece of junk has no power and runs screaming hot.


Greg

 

[wachuko]

^^ very cool setup!

 

[Janderso]

Air ?
I built this grinder for my thickness planer blades. The holder slides on linear ball bearings. Can't see it in the photo but I apply a couple of psi air into the housing. There are no mechanical seals, the slight air flow keeps the grit out. Been working great for a few years now.
Need a beter grinder motor on it though, that Chinese piece of junk has no power and runs screaming hot.
View attachment 408328

Greg

Air, why not?
Very cool

 

[FOMOGO]

Love the planner blade sharpener setup. Have been considering something similar, if I ever get done working on the shop. Have been getting by with touching them up by hand with a 1000grit diamond stone. Mike

Air ?
I built this grinder for my thickness planer blades.

 

[NCjeeper]

I’m struggling with a way to deter grinding dust from entering the bore.

For as little as I will end up using mine, I am not sure if dust getting into the bore will be an issue. I can always wipe it out after I use it.

 

[Just for fun]

Looking good Jeff,

Following along and learning!