Page 7 - Catalog spare parts BPW brake disc

Auto Parts / Page 6 BPW-EL-TSB 31231601e
1 Axle beam, steering axle beam

General

BPW Axle beams
Square, reliable, light – the BPW axle beam. It’s the stable
foundation for a long vehicle life. In combination with
our brakes and suspension systems, the square axle

produces axle systems which offer convincing all round
performance with long service life and maintenance
intervals.

The BPW square axle beam consists of two high-quality,
specially rolled “U” sections which are welded together
inside and out.
The special feature of the BPW standard axle tube with a
120 mm axle cross-section is its Q.U.A.D. profi le (Quality
Upgraded Advanced Design). This profi le features more
material at the corner radii and less material in the top
and bottom areas. As a result, the axle cross-sections are
reinforced at the points where the force is applied and are
optimally shaped to cope with the load.
The Q.U.A.D. profi le ensures that the maximum service
life can be achieved. BPW axle tubes are available
with various cross-sections and wall thickness values
depending on the axle load and the application
conditions.
BPW axle stubs are forged, quenched and tempered.
They have two stepped bearing seats. Axle beam after fl ash
butt-welding
The axle stubs and axle tube are flash butt welded
together to produce the one piece BPW axle beam.

In this welding process, the axle tube and the ends of the
axle stubs are heated up to welding temperature by an
electric current applied at their joining faces, whilst at the
same time being forced together.
This produces an absolutely homogeneous connection
without any inclusions. In contrast to conventional
welding processes, no fi ller metals are needed.
At the same time, the axle beam is given its camber and
toe-in.
Axle beam after removing
the welding fl ash

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