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Zwick’s latest tester
can be spring loaded
At Wire 2008 Zwick exhibited a compression-spring tester for
accurate measurement of precision springs from 1 to 2,500N. Zwick
says that the compression-spring tester has extremely good overall
measurement technology characteristics, surpassing even the
requirements of Standard EN 7500.
The compression-spring tester is used with the zwicki single-column
Manufacturer and Stockist materials-testing machine in conjunction with testControl electronics.
of Quality Threading Tools
The device possesses extreme vertical and lateral stiffness and comes
already equipped with a precision load-cell. Overload protection
prevents damage to the load cell in the event of block force being
reached.
Precision guides allow only vertical movement of the
Product range
compression platens. The extremely stiff and patented load cell is
insensitive to transverse forces and ensures that measuring errors due
• Flat thread rolling dies to elasticity under load or eccentric forces are reduced to a minimum.
• Flat knurling dies
The instrument is designed for
• Flat form rolling dies
indirect spring length
measurement, and this offers a
• Circular thread rolls
high level of accuracy as the
• Tangential chasers
already minimal axial
deformation can be electronically
compensated in real time. Zwick
believes that it is the only
manufacturer able to achieve
this. Direct measurement is
available as an option and is
recommended for high-precision
testing of very small springs.
The instrument can be fitted
with a CE conformable safety
protection, and an anti-buckling
guide spigot, matched to the
spring geometry, can also be
used.
Thrufeed rolling system by TMC Tesker
Licensed products
The Tesker Model 645 Thread The front load fixture is equipped
Rolling Machine is equipped with with cam release loading ramp and
• Taptite 2000
®
• Taptite II
®
modular design load and unload a powered bar feed to position bars
• Duo Taptite
®
• Taptite
®
CA
fixtures. The system is currently for rolling. The unload fixture is
in production at a customer equipped with automatic discharge
• Powerlok
®
• Plastite
®
facility rolling special threads on and unload ramp, totally enclosed
• High-Torque • Screwbolt 100 ksi bars in lengths of 20ft to for safe operation.
• Mathread
®
60ft. The threads range from The system is operated from
7/8-4 to 3 ½ - 3 ½ TPI. the main PLC panel. Additional
Visit our website The system is designed for station controls are conveniently
www.rlstooling.co.uk
minimal changeover and easy set positioned to streamline fixture
up to run both LH and RH threads. set up and operation. All controls
The Model 645 has a capacity of 6 are interlocked for safety.
inch diameter and a rolling force of The overall system is an
up to 235,000lb, which Tesker says impressive 150ft long, built with
makes it the most powerful high strength and rigidity to
machine in its class. effectively handle this tough
The fixtures are inter-connected parts handling job in an operator
in 20ft sections for incremental friendly and safe operation.
e-mail: info@rlstooling.co.uk
operation up to 60ft to cater for the A similar rolling system can be
fax: +44 (0)1543 277571
actual bar stock length to be rolled, manufactured for all Tesker
tel: +44 (0)1543 271808
and feature self centering thread rolling machines. A
Apex Business Park, Walsall Road, Norton Canes, mechanisms for the various system is currently in production
Cannock, Staffs, WS11 9PU, England diameters, wear resistant feed for a Model 4840HS 3 die
pads, and latched safety covers. machine.
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