Hydra-Vise??
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Thread: Hydra-Vise??

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    Default Hydra-Vise??

    Ran across an older 4ton version of one of these.
    http://www.dapra.com/workholding/arn...lassic-mh.html

    How does the hydraulic clamping work? What are the up and downsides compared to a Kurt style for a manual milling machine?

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    As far as I understand it they're great as long as in good working order. They develop problems over time like pressure bleed down and then they need parts replacement. I personally wouldn't want to be using one and find out it lost pressure the hard way?
    Dan

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    Hail hydra!

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    Several years ago I worked for a company that had two hydra vises. The hydraulic spindles did not work properly. We had them rebuilt by Dapra. The hydraulics failed within weeks. I have no use for the damned things. I have a Dapra vise with a defunct air/oil spindle I would be delighted to sell to the first $100.00. It includes one set of new jaw plates and one set of re-ground plates. I was planning to make a new spindle, purely mechanical, but decided against it. Btw a new mechanical spindle from Dapra is about $1500. End of rant.
    Last edited by Illinoyance; 10-04-2016 at 06:24 PM.

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    plus - When they work they really squeeze the workpiece, and they open up really long for their width. Negative - They don't have the hold down feature of a Kurt, so the movable jaw can lift by the amount of wear in the guideplates.

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    Default will give you $100 depending on shipping cost

    Quote Originally Posted by Illinoyance View Post
    Several years ago I worked for a company that had two hydra vises. The hydraulic spindles did not work properly. We had them rebuilt by Dapra. The hydraulics failed within weeks. I have no use for the damned things. I have a Dapra vise with a defunct air/oil spindle I would be delighted to sell to the first $100.00. It includes one set of new jaw plates and one set of re-ground plates. I was planning to make a new spindle, purely mechanical, but decided against it. Btw a new mechanical spindle from Dapra is about $1500. End of rant.
    will give you $100 depending on shipping cost

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    the tightening screw pushes fluid to moveable jaw

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    Quote Originally Posted by bruce fusello View Post
    the tightening screw pushes fluid to moveable jaw
    Not quite. The screw pushes a small diameter piston into an oil-filled chamber. The large piston at the other end of the chamber pushes the operating rod that runs through the screw. I can forward the manual if you want.


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