Planet Carrier

    Initial situation

    Planet carriers are used in automatic transmissions. These parts are produced in large quantities and often on vertical turning machines.

    Full automated production and high reliability are recommended for this part. The challenge is to machine the bores within very tight concentricity and perpendicularity tolerances in two different materials.

    Material: steel and sheet steel

      Metric Imperial
    Bore-Ø: 14.5N7 0.5709 +0.0006 in
    Length: 2 x 5 mm 2 x 0.1969 in

     

     

    The URMA solution

    Special reaming tool with guide pads

    The guide pads ensure keeping the tight tolerances also with a mature worn out insert. This improves the tool life significantly.

    An additional runout adjustment after insert change is not needed, due to the precise interface between insert and shank.

    The central clamping screw guarantees a quick and save insert change.

    More about special tools

    Cutting data URMA machining

      Metric   Imperial    
    Cutting speed Vc: 140 m/min SFM: 459 ft/min
    Feed per tooth fz:  0.10 mm ipt: 0.004 in
    Number of teeth: 6        
    Feed fv:  1844 mm/min ipm: 72.6 in/min
    Radial stock removal ap:  0.12 mm D.O.C.: 0.005 in

     

     

    Highlights

    Tool life of 3'400 bores
    Easy tool handling for machine operator
    Remarkable less setup time

    Do you have any questions?

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