Technology experTs
37recyclinginternational.com | May/June | 2019
small parts play a big
role in giant components
Forged wear parts have become increasingly popular in the auto-
motive sector, among others, because they extend the product’s
lifecycle while lowering downtime and maintenance costs. Sales of
forged shredder hammers and pin shafts by Stahlwerk Augustfehn
have increased by 100% in the last three years alone.
Stahlwerk Blue is the name of the new
generation of forged shredder ham-
mers (12kg, 121kg and 450kg) from
Stahlwerk Augustfehn. The company’s
history of forging goes back more
than 145 years, when it was a subsid-
iary of Krupp Steel. Since 1989 it has
been a privately held company and is
now fully modernised and ready to
take on new challenges. A large group
of recycling, mining, machinery and
plant engineering companies rely on
the forged parts from northern
Germany.
Global reach
As well as the wear parts for metal
recycling and mineral processing, pis-
ton rods, coupling rods, buckets for
dredging and excavation, rollers,
reels, rolling bearings, gear rims and
forged blanks are all delivered to
more than 500 customers in 35 coun-
tries in Europe, America, Africa, Asia
and Australia.
Stahlwerk Augustfehn’s crew knows
how to handle hot steel, including dif-
ficult metal-forming processes and
complicated parts. The newest tech-
nologies are essential to be competi-
tive in the global market. Highly
stressable forged parts find success
worldwide because of the combina-
tion of experienced staff and the best
use of modern technology.
On top of state-of-the-art CAD con-
struction and a fully CNC-controlled
hydraulic press, various five-axes mill-
ing and turning machines are in the
machine pool to ensure parts can be
produced even faster.
MaxiMuM breakinG
resistance
Large components do not cause
undue concern to the forge, even if
they are made for engineering giants
with overburden excavators in open-
pit mining or bucket wheel loaders,
which present a challenge to the sup-
plier with their large compression
stresses due to weight (up to 15 000
tonnes), enormous tensile stresses and
accelerated frictional wear on every
component. For these excavators to
have a long lifecycle, every part must
be premium quality.
This expertise from other industries is
transferred in the wear parts, resulting
in longer wear time and less stress to
other components of the shredder
due to special features like differential
heat treatment.
Local adjustment to the hardness
reduces pin wear as well as the risk of
fracture – and maximises wear time on
the beating end. The forged tool does
not widen on the hole, which allows
easy dismounting. The forged pin
itself guarantees maximum breaking
resistance and minimal wear as the
hardness matches the hardness of the
hammer-hole.
Longer wear time reduces mainte-
nance costs, mill downtime and the
parts inventory. Stahlwerk Augustfehn
looks confidently to the future: the old
tradition of forging is attracting mod-
ern attention and will find even more
applications.
www.stahlwerk-augustfehn.de
Jannik Aufermann, Stahlwerke Augustfehn’s sales engineer
shredder parts.
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