Brake disc

Description

The automotive industry requires millions of car brake discs. Therefore, the manufacturing method must be optimized to 100%. In this application, there are two different types of holes that ought to be drilled and finished in the shortest possible time.

Application details

Application details

Bore Number 1:

  • Core hole for M8 thread
  • Chamfer front and back: Ø8.5x90°
  • Material: Cast

Bore Number 2:

  • Bore: Ø8.6 mm
  • Countersink forward: Ø17.2x90°
  • Chamfer backward: Ø0.5x45°
  • Material: Cast

Proposed solution

Proposed solution

Bore Number 1:

The core hole is drilled, chamfered front and back Ø8.5x90° in one singe pass with a VEX-S / SNAP5 drill cominbation tool.

Machining parameters:

  • Cutting data VEX:
    Speed: 3200 rev/min.
    Feed: 0.25 mm/rev.
    Coolant: dry
    Tool life: 250 m, = approx. 30'000 bores
  • Cutting data SNAP:
    Speed: 1900 rev/min.
    Feed: 0.15 mm/rev.
    Coolant: dry
    Tool life: > 30'000 bores

Bore Number 2:

This hole is drilled, countersinked forward Ø17.2x90° and back chamfered Ø0.5x45° in one single pass too. It is made by a special VEX drill-countersink cominbation tool.

Machining parameters:

  • Cutting data VEX:
    Speed: 2600 rev/min.
    Feed: 0.26 mm/rev.
    Coolant: dry
    Tool life: 250 m, = approx. 30'000 bores

  • Cutting data Indexable insert:
    Speed: 1500 rev/min.
    Feed: 0.15 mm/rev.
    Coolant: dry
    Tool life: > 15'000 bores

  • Cutting data SNAP5:
    Speed: 1500 rev/min.
    Feed: 0.15 mm/rev.
    Coolant: dry
    Tool life: > 30'000 bores

Customer benefits

Customer benefits

The integration of different machining operations into one tool combined with the proven process capability assures best possible cost efficiency.