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.

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?

Nous nous réjouissons de votre prise de contact.