Repair gressel vise MHS Grefors

L

laurentl38

Plastic

Joined

Mar 6, 2008

Location

france

• Jun 6, 2019

• #1

hello,

I have a Gressel vise (MHS125) whose end of the clamping rod is broken (photo).
Having already contacted Gressel, it changes the whole block and do not do details, the price (not far from 4 digits) is felt ... And they are, unfortunately not very loquat on the way to dismount the block

I already tried to unscrew the "puck" with the 4 blind holes, but nothing comes. So, before going to the "hard" and the risk of deteriorating a little more.

Does anyone know or have already disassembled this item?
would there be a trick, something that would have escaped me?



Thanks for any help!
Laurent

 

J

john.k

Diamond

Joined

Dec 21, 2012

Location

Brisbane Qld Australia

• Jun 6, 2019

• #2

dont have one,but....see if you can find the patent on the unit,it should have some detail on the unit.I have a Huron,but nothing like that.

 

L

laurentl38

Plastic

Joined

Mar 6, 2008

Location

france

• Jun 6, 2019

• #3

very good idea thank you for the info.
I just looked for patents on this vice. and I found it.
Here I understood everything, there is not much solution, we must unscrew the piece (24).
The fact that there is 4 belleville washer. It must really force with a key and a large extension.
I do not see other elements that could prevent the piece from opening (24)

 

J

john.k

Diamond

Joined

Dec 21, 2012

Location

Brisbane Qld Australia

• Jun 7, 2019

• #4

Looks like some kind of fancy ratchet and torque limiting device........more than likely,you could eliminate the lot,and just drive the vice screw direct.

 

L

laurentl38

Plastic

Joined

Mar 6, 2008

Location

france

• Jun 7, 2019

• #5

I must try to unscrew the ring again.
if I can not do it or I finish destroying it at demoting. I replace the system by a classic screw. It will be worse, but still better than nothing ...

 

M

muckalee

Cast Iron

Joined

Jul 17, 2011

Location

Americus, Georgia

• Jun 7, 2019

• #6

Check the description for item 24, threads my be Left hand.

 

L

laurentl38

Plastic

Joined

Mar 6, 2008

Location

france

• Jun 7, 2019

• #7

unfortunately in the description of the patent, there is no indication, whether it is right or left hand. to test ...

 

J

john.k

Diamond

Joined

Dec 21, 2012

Location

Brisbane Qld Australia

• Jun 7, 2019

• #8

if you intend to use the vise yourself,there will be no need for the device......they are designed to prevent damage by imbecile workers using lead hammers and the like to tighten vises.

 

gbent

Diamond

Joined

Mar 14, 2005

Location

Kansas

• Jun 7, 2019

• #9

The straight knurl means they meant for you to use a pipe wrench.

 

L

laurentl38

Plastic

Joined

Mar 6, 2008

Location

france

• Nov 2, 2019

• #10

hello,

I arrived to find some time for a new attempt at dismantling.
I made a key and with a piece of tube inside, I could unscrew the nut.
I solder a piece of rod and make the edge.
After reassembly, all works perfectly.

I had contact Gressel to know the price of a repair, they told me about 900Euro!

Like, it comes from the scrap dealer, I'm doing pretty well. it just missed the jaws, to remake or find opportunity ...

In the end, I do not have a bad deal ... ;-)