I have two hydraulic vices made by Arnold one of which came with my FP1.
Enclosed is a picture of the unit components showing assembly.
My understanding of the operation having striped and refurbished the units is as follows.
The main handle has an inner mechanism with a hexagonal socket which can be used for rapid winding only, the outer handle is all that is needed for clamping.
When you wind in the handle the piston is not activated and the main screw that operates the piston is in the fully out position. When more pressure is put on the handle the main screw operates and pushes the outer piston which in turn moves the inner piston. The inner piston pushes the control rod pushes against the vice jaw to apply the real clamping force.
The Arnold 90mm vice will exert a force of 2500Kg, the 125mm unit 4000Kg, nearly 4 tons all which is done by hand turning only. A more civilised way of using a vice rather than hitting it with a mallet.
All the best Adrian.
I like that Sine fixture!
Who makes those?
Originally Posted by T. NGUYEN BINH
Deckel used to make those sine bars, or more likely had them made and re-labelled them.
Now you can buy one from Röhm.
Röhm Sinuswinkel-Einstellger. Pse-0 Nr. 890706 bei Mercateo günstig kaufen
The price dropped a lot since the last time I checked the price of these items. I seem to recall it was ca 1000 euros a few years ago.
Tere is a similar one on fleabay by SPI,
Im going to keep my eyes open for one like that