Roller screw actuators
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  1. #1
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    Default Roller screw actuators

    I'm designing a piece of equipment for an application that traditionally has used hydraulics but I'd like to use a planetary roller screw. I need to generate about 90 kN of force with about 450mm of stroke. I'd prefer to buy the screw already packaged in an actuator rather than buy the screw alone. I believe these are used a lot in the molding machine industry. Who is a good source for these? It looks like the Exlar FTP series might be a good fit. Any other sources?

    Curtiss Wright | Actuator Group | Products | Curtiss-Wright Actuation Group

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    Exlar is probably the gold standard for roller screw actuators, but they aren't cheap. SKF also makes roller screws and packaged actuators.

    90kN isn't that high of a force, so I would consider a ballscrew actuator as well. They are usually significantly cheaper. Bosch, Nook, and many others make them, although not all manufacturers will go to that high of a load rating.

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    We looked at these units as well and they look well designed / manufactured - Linear motion manufacturer of CPD Actuators [USA]

    We build a lot of equipment with Exlar actuators and have probably purchased / integrated over 300 actuators with good experience. We looked at Creative Motion Control when we needed 12 actuators for a parallel hexapod with a 350klb load.

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    CMC originally had a really cool recirculating roller design, but I don't think it worked out, so they switched to the more traditional planetary roller design. It's too bad, the recirculating design was very elegant.

    One of my projects about 6 years ago used a pair of large CMC screws. There were some major issues, but it was long enough ago that I don't want to go into them on the forum; 6 years is a long time. I'm happy to discuss it by PM though.

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    I don't know if this is even close to what you want but I have two NEW linear actuators for sale. Here's the info:
    Duff-Norton MPB6905-12 115 V. 500 lb. 12" Linear Actuator.
    Priced to sell way below MSR. 275.00 Each + shipping.
    spaeth

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    Kissler makes nice ones

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    Quote Originally Posted by spaeth View Post
    I don't know if this is even close to what you want but I have two NEW linear actuators for sale. Here's the info:
    Duff-Norton MPB6905-12 115 V. 500 lb. 12" Linear Actuator.
    Priced to sell way below MSR. 275.00 Each + shipping.
    spaeth
    Heres what the Duff Nortons look like.
    Attached Thumbnails Attached Thumbnails duff-1.jpg  

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    The Duff Nortons are sold.


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