Valve housing


Task

  • Machining of bearing bore in valve housing
    Ø 76.0 mm H7 x 680 mm deep
  • Machine: HECKERT horizontal drill with ISO
    50 steep-angle taper without IKZ, with
    compressed air up to approx. 6 bar
  • Material: GGG40, vc = 70 m/min, f = 0.15 mm/rev

Solution

  • Rough boring from Ø 65 mm to Ø 75.5 mm +
    0.02 mm with rough boring head XB 8652910
    in short version
  • Rough boring to full depth of 600 mm with
    extension XA 5402030
  • Solid boring of counter-bearing with XV
    0305860 Ø 75.3 ± 0.1 mm and guided
    extension, XA 2008840 to a depth of 680 mm
  • Reaming of pilot bore Ø 76.0 H7, with short
    version in DAH
  • Finishing reaming to full depth with guided
    extension

 

 

 

Solid boring of
counter-bearing
vc = 80 m/min
fz = 0.15 mm/rev


Pilot bore
Ø 76.0 H7
vc = 80 m/min
vf = 600 mm/min

Finishing reaming
Ø 76.0 H7
vc = 80 m/min
vf = 600 mm/min