Shopsmith Mark V11????

8iowa · Post by **8iowa** » Fri Jan 01, 2010 12:05 pm

Francis:

You have a veritable "Shopsmith museum". Thanks for sharing the pictures. I've always been intrigued by the Mark VII and it's unique features. If I ever come across one in good shape I might not resist.

Back in the 60's and 70's Sears was a tough taskmaster. They would send their quality control people into a plant and create absolute chaos.

a1gutterman · Post by **a1gutterman** » Fri Jan 01, 2010 12:20 pm

Ol Max wrote:Would a speed change mechanism from a Mark V work in a Mark VII?
Thanks to all of you for responding to my question. I was hoping that repairs for a Mark V could be used.

As I understand it, the answer to your question is "NO".

beeg · Post by **beeg** » Fri Jan 01, 2010 12:32 pm

Ol Max wrote:Would a speed change mechanism from a Mark V work in a Mark VII?
Thanks to all of you for responding to my question. I was hoping that repairs for a Mark V could be used.

It's knot crossed out for the M7 in my catalog. So call SS and ask them.

billmayo · Post by **billmayo** » Fri Jan 01, 2010 5:08 pm

Ol Max wrote:Would a speed change mechanism from a Mark V work in a Mark VII?
Thanks to all of you for responding to my question. I was hoping that repairs for a Mark V could be used.

I checked a Mark VII headstock today. NO Way. The Speed changer hole in the Mark VII headstock is vertical while the Mark V headstock access hole is horizontal to allow acccess for the quadrant and quadrant legs. None of the screw holes for the Mark V speed changer line up with the Mark VII mounting. Replacing the Mark VII headstock with the Mark V headstock is your best bet.

tryinhard · Post by **tryinhard** » Sat Jan 02, 2010 8:48 am

In another post, think I saw a picture of the Mark VII speed changer part that was such a problem due to melting or breaking, as it was plastic. It looked like a big cam. If that is the case, would it be so difficult to reproduce using metal? Or is there something else that is making things too difficult to fix the Mark VIIs?

dusty · Post by **dusty** » Sat Jan 02, 2010 8:52 am

tryinhard wrote:In another post, think I saw a picture of the Mark VII speed changer part that was such a problem due to melting or breaking, as it was plastic. It looked like a big cam. If that is the case, would it be so difficult to reproduce using metal? Or is there something else that is making things too difficult to fix the Mark VIIs?

I have wondered that myself. But, why was it done that way in the beginning (why plastic)? Was there a reason?

Today maybe there are non-metallic materials to do that job but back then... ????

wlhayesmfs · Post by **wlhayesmfs** » Sat Jan 02, 2010 9:31 am

Probably a good machinest could make the change, Farmer has a great picture of the plastic cam. Not sure if that was the only problem I have not been lucky enough to fine a MKVII that I was able to get
Here is the picture from Farmers file.

mickyd · Post by **mickyd** » Sat Jan 02, 2010 9:35 am

tryinhard wrote:In another post, think I saw a picture of the Mark VII speed changer part that was such a problem due to melting or breaking, as it was plastic. It looked like a big cam. If that is the case, would it be so difficult to reproduce using metal? Or is there something else that is making things too difficult to fix the Mark VIIs?

This might be the post your referencing. I can't see any reason why one couldn't reproduce the cam in metal or even hardwood with a shim stock cam surface (if shim stock is even needed).

Can someone post a trace of the cam profile along with documenting the other dimensions needed to reproduce it?

wlhayesmfs · Post by **wlhayesmfs** » Sat Jan 02, 2010 9:37 am

try again on the picture Looks like the speed cam picture worked this time.

mickyd · Post by **mickyd** » Sat Jan 02, 2010 9:37 am

wlhayesmfs wrote:Probably a good machinest could make the change, Farmer has a great picture of the plastic cam. Not sure if that was the only problem I have not been lucky enough to fine a MKVII that I was able to get
Here is the picture from Farmers file.

Forgot the picture Bill

Shopsmith Forums

Shopsmith Mark V11????

Question for Bill