DIY OD Grinder fixture, For the surface grinder- maybe

[jbobb1]

The clearance really depends on the diameters you're working with. General rule of thumb is .001 per inch of diameter but wanting best accuracy and you're not running at a high speed, you could tighten that up a bit. Maybe .0006 - .0007 per inch

 

[Janderso]

On a positive note, I have .0002" over 4" parallel to the surface plate with a ground rod!!

 

[Janderso]

More progress today.
The spindle datum is within .0002” over 4”. This is coplanar to the ground base. That’s a good thing.
The ends however were rough as a cob and not ground with much attention to detail.
I set the part on an angle plate, dialed it in and dressed the one side on the SG.
I flipped it around and cleaned up the other side.
I also cleaned up the sides by putting it in the vise, indicated equal to the spindle cavity, flipped it using parallels.
Now I have a clean, straight casting to work with.
Stay tuned.

 

[Janderso]

Well shoot.
I thought I had a face plate for my lathe but all I could find was a drive plate.
I found some on Ebay but it would be close to $450 for something I would rarely use.
I need to make a relief and oring groove on both sides in the bore.
This could be done on the mill, I guess that's where we are going from here. Never cut an oring groove in the mill
I machined off the indexing part of the casting. Used the rotary table and a roughing end mill. Uneventful.
Then I went over to the 2X48 belt sander to clean it up.

 

[mmcmdl]

This is when a facing head comes in handy Jeff . Internal snap ring grooves etc .

 

[woodchucker]

Well shoot.
I thought I had a face plate for my lathe but all I could find was a drive plate.
I found some on Ebay but it would be close to $450 for something I would rarely use.
I need to make a relief and oring groove on both sides in the bore.
This could be done on the mill, I guess that's where we are going from here. Never cut an oring groove in the mill
I machined off the indexing part of the casting. Used the rotary table and a roughing end mill. Uneventful.
Then I went over to the 2X48 belt sander to clean it up.

Won't a drive plate work?
I assume a drive plate is a face plate with a cut out for the dog leg?
I have used mine to attach things too. Do you feel the cut out might make it less rigid?

 

[Janderso]

Won't a drive plate work?
I assume a drive plate is a face plate with a cut out for the dog leg?
I have used mine to attach things too. Do you feel the cut out might make it less rigid?

You need to fasten the part ot a plate. Oh, wait. I see what you are saying. I won't have access to machine the ID unless I am just not understanding the set up..
Maybe we can get Dave to explain a "facing head"?

This is when a facing head comes in handy Jeff . Internal snap ring grooves etc .

Dave,
Is that one of those boring heads that you hold while it moves outward?
It can be used for facing and boring?? Goes on the mill?

 

[Janderso]

Dave,
What about an expanding 5C collet?
I like it!!
Machine to the right size, Bob's your uncle
Or, is this too much weight for this application?

 

[mmcmdl]

Dave,
Is that one of those boring heads that you hold while it moves outward?
It can be used for facing and boring?? Goes on the mill?

Yes , yes and yes ! And the expanding collet would work also . Just so it doesn't let go when grooving .

 

[Janderso]

Yes , yes and yes ! And the expanding collet would work also . Just so it doesn't let go when grooving .

I'll wear my motorcycle helmet.
I don't have a lot of confidence in these Chinesium expanding mandrels.
But, we'll move forward.

Thanks man