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SPARKS
ELECTRICAL NEWS
MAY 2017
CONTRACTORS’
CORNER
10
Powerful electric breaker from Bosch.
B
osch has launched a powerful electric
breaker for demolition work in concrete,
stone, or asphalt. The Bosch GSH 27 VC
Professional has impact energy of 62 joules, with
an average material removal rate of 3.2 tons an
hour, a 50% increase over the previous model. An-
other advantage of the breaker is its low vibration
of 8 m/s
2
, owing to the vibration-reduced hammer
mechanism and decoupled handles. This means
the permitted trigger time of the tool is more than
three hours per working day.
“All these benefits provide professional
tradespeople with fast work progress, and more
comfortable working conditions, with reduced
vibration, even in the toughest applications,”
says Campbell Mhodi, Bosch Professional
Power Tools senior brand manager.
Durability and superior lifespan are
guaranteed thanks to the robust construction,
which uses high-quality aluminium and steel
components. A new feature is the anti-slip
surface on the housing cover, which means
the 27 kg breaker can be propped up against a
wall conveniently and safely, or against suitable
objects between operations, without any danger
of falling over.
Enquiries: +27 (0)11 651 9600
T
he new Hengstler Acuro® AX73 is a
class leading optical encoder that offers
smooth speed regulation with high levels
of precision. Its compact dimensions make it
suitable for installation in areas where there are
space constraints.
Available from the official Hengstler
distributor for southern Africa, Countapulse
Controls, this absolute rotary encoder is ideal
for ATEX-rated applications. The Acuro® AX73
encoder carries ATEX and IEC Ex certification
for gas and dust explosion proof requirements.
The advanced optical encoder offers
benefits for myriad applications including on
winches, cranes, drill and other oil and gas
industry equipment, as well as in paint plants,
petrochemical facilities, bottling plants and
grain mills.
The connection configuration on the encoder
allows the routing of cabling with the encoder
installation in separate steps. This provides
significant cost and time savings during
installation, as cabling can be completed in
advance. This type of installation also allows
the quick replacement of a spare encoder
during maintenance and servicing activities.
Another feature that facilitates ease of
maintenance is the use of just two screws
for the connection hood. Many comparable
encoders use six or even eight screws, while
insufficient corrosion protection makes such
units difficult to uninstall. Special patented
screws are used to protect the unit against dust,
water and corrosion.
The optical scanning system provides
a highly accurate 22-bit resolution sensor
signal for wherever precision or smooth speed
regulation is necessary. Despite this high level of
accuracy, the encoder itself is robustly designed
with excellent resistance to shock, vibration and
external magnetic fields. The stainless steel
housing is rated to IP 67 protection and can
operate in Ex-related ambient temperatures
from −40 to +70 °C.
With a housing diameter of only 76 mm, the
encoder is ideal for use where space is limited.
The encoder can be ordered with SSI, BiSS-B,
BiSS-C and Profibus interfaces.
Johannesburg-based, Countapulse Controls
has an in-depth understanding of the
application of absolute rotary encoders and is
able to assist the market in selection of the best
fit solution for a given application.
Enquiries: +27 (0)11 615 7556
POWERFUL DEMOLITIONS HAMMER
FROM BOSCH
SMOOTH SPEED
REGULATION
EASY WITH
HENGSTLER
The new Hengstler Acuro® AX73 is a class leading
optical encoder that offers smooth speed regulation
with high levels of precision