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Water Jet Rack and Pinion Gear?

Discussion in 'CNC Mills/Routers' started by autox3d, Nov 21, 2015.

  1. autox3d

    autox3d Journeyman

    Oct 3, 2015
    Likes Received:
    My local water jet shop was cutting rack and pinion from aluminum plate. Aside from the slight bevel any reason why this would not work even if it was done in 12mm steel plate?

    Matching gears done on a shaper?

    I can get use of a shaper for small sizes but longer parts not so much.
  2. Jonny Norris

    Jonny Norris Veteran

    Aug 17, 2014
    Likes Received:
    Waterjet doesn't produce 90degree square edges so all the teeth will have a taper, had some 12mm aluminum gantry plates cut by a company big in the waterjet cutting industry here in the uk on a fantastic looking piece of kit and I'd say the taper offsets back face by around 0.7mm.

    I suppose if you angle the pinion to accommodate the taper it might get around it. Another concern would be accuracy as the rack will ultimately define the accuracy of your machine.

    Waterjet cutting tolerances are not fantastic, most companies will only guarantee within 0.25mm whereas as a common rolled steel rack is accurate within 0.05mm

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