heavy duty coil springs leaf springs torsion bars · heavy duty coil springs • leaf springs •...
TRANSCRIPT
Straight advice, specialists you understand and...
Heavy Duty Coil Springs •
Leaf Springs •
Torsion Bars •
SPRINGS
www.pedders.com.au
Springs - The Facts
The primary function of springs, whether they be Leaf,
Coil or Torsion Bars, is to absorb the shocks that are
created when driving across irregular road surfaces
and to maintain the tyres’ contact with the road.
The spring rate, or stiffness, must be matched to the
weight of the vehicle resting on it and the weight of
the other suspension components and the wheel.
Spring rate also controls roll stiffness, or body roll.
By reducing the amount of body roll, we reduce the
amount of wheel camber change. Large camber
change can drastically reduce the tyre’s contact
with the road surface, severely limiting the handling
potential during cornering.
The handling of most vehicles is substantially improved
by increasing the original spring rate to an optimum
rate which maximises tyre adhesion and reduces
body roll for better handling. Increasing the spring rate
beyond the optimum rate detracts from the handling
potential as the tyres begin to skip over bumps,
reducing grip and safety.
Coil Springs
Coil springs are the foundations of the modern
suspension system with most car manufacturers
preferring Coil Springs due to their advantages of
weight, tenability, space and ease of manufacture.
Pedders research, design and manufacture their own
range of Coil Springs from their own World-Class
Manufacturing plant in Victoria, Australia to ISO 9001
standards.
Coil Spring Design and manufacturing is a craft which
requires strict adherence to a demanding series of
procedures, all of which are critical to the performance
of the final product. Pedders undertakes the following
key steps in relation to its Coil Spring Manufacturing
Process:
• Hot Coiling
• Oil Quenching
• Furnace Tempering
• Shot Peening
• Scragging
• Loaded Height and Rate Testing
• Powder Coating and Packaging
Straight advice, specialists you understand and...
Pedders produces its coil springs to the highest possible
standards following ISO 9001 requirements.
Pedders offer the highest possible quality coil springs due
mainly to the following quality manufacturing elements;
Shot Peening
Shot Peening, using a full hardened steel shot, is the process
used to relieve stresses on the wire that are wound into the
spring during coiling. Shot peening provides extra life to the
spring which improves performance, durability and longevity.
Scragging
Scragging is the process of compressing the spring beyond its
normal working limit which effectively pre-sets the spring and
determines its finished height. Pedders scrag to 100% or “coil
bound” to improve the long term durability and performance
of the spring.
Load Testing
To ensure the most accurate finished product for the desired application,
Pedders Suspension load tests 100% of its coil springs to the vehicle’s
installed height specification. This system involves loading a spring with
a pre-determined, application specific load and specifying the height that
the spring must come to.
This is a far more accurate and complex system than simply a measure
of ‘free’ or ‘unloaded’ height. Pedders define a height tolerance of +/-
2mm for its range of SportsRyder & TrakRyder Springs and +/- 5mm for
its range of Touring Springs. This height tolerance for Pedders Touring
Springs is consistent with that of original equipment springs. Pedders
also load test 100% of its springs rather then simply batch testing.
www.pedders.com.au
WHAT IS ISO 9001?
The Pedders Suspension Coil Spring Manufacturing
Plant holds the World Recognised Manufacturing
Quality Standard ISO 9001.
The goal for Quality System Requirements ISO
9001 is the development of fundamental quality
systems that provide for continuous improvement,
emphasising defect prevention and the reduction of
variation and waste in the supply chain.
What this means for the retail and trade customers
of Pedders Suspension is that they can be assured
that they are using a product that is of a significant
quality standard.
The Pedders Suspension Coil Spring Manufacturing
Plant also holds ISO14001 Environmental
Certification, an international standard which aims
to support environmental protection and prevention
of pollution in balance with socio-economic needs.
Pedders Coil Spring RangePedders offers to its trade and retail customers, four
different branded coil spring ranges.
PedderS HeAvy duTy COIL SPrIngS
Pedders Heavy Duty Coil Springs are Pedders
standard and raised height replacement coil springs
for passenger and light commercial vehicles.
Pedders Heavy Duty Coil Springs are built to ISO
9001 standards and have unrivalled levels of
comfort, handling and load carrying ability.
Pedders SportsRyder Coil Springs are Pedders
Premium range of lowered Coil Springs for sports
and performance applications. Built to ISO 9001
standards with tolerance of only +/-2mm at load
height Pedders SportsRyder Coil Springs are
simply unrivalled in terms of handling, vehicle
appearance and performance.
SPRINGS
Straight advice, specialists you understand and...
Pedders Trak Ryder Coil Springs are the pinnacle of Four Wheel Drive Coil Springs
available in the marketplace. Once again TrakRyder Coil Springs are built to ISO 9001
standards offering the motorist unparalleled levels of stability and performance over
the roughest terrain or in the car park. Common applications offer several height
options for customers to choose from.
Torsion Bars, most commonly used
in recreational four-wheel drive applications
are simply a straight coil spring.
All torsion bars may look much the same but because they peform exactly the same function as coil and
leaf springs they must also be rated to match the total suspension system and weight of the vehicle. Like
Pedders Coil Springs, Pedders TrakRyder Torsion Bars are made from the highest quality alloy spring steel
according to strict production procedure and all fully heat treated and tempered for durability, hardness
and consistency. TrakRyder torsion bars are made to a larger diameter than most original bars, providing
a firmer rate for greater control and improved load carrying ability.
Pedders Trak Ryder torsion bars are heavy duty replacement units that provide a permanent upgrade for
the front suspension. Whether your vehicle is in standard form or has been fitted with a bull bar, winch,
dual battery system or any other heavy accessory, Trak Ryder torsion bars provide extra control, stability
and traction for enhanced performance.
Pedders Touring Springs, Pedders newest addition to its coil spring range, are built
to industry standards (thus less than Pedders premium Sports Ryder range) and
priced for the performance motorist on a budget. Still built to ISO 9001 standards
Pedders Touring Springs are simply the best quality budget coil springs available
in the marketplace – for the motorist more interested in vehicle appearance than
performance handling.
TOURING SPRINGS
SPRINGS
ToRSIoN BaRS
www.pedders.com.au
LEAF SPRINGS
For heavy duty load carrying and towing,
leaf springs remain the best performing suspension
design, but can become harsh, noisier and less effective
in dampening bumps and vibrations. They are also prone
to sagging and should be re-set or replaced when a change in ride
height or ride quality is observed.
Pedders offer full replacement leaf spring packs for car, light commercial and
four wheel drive applications that feature metal eye sleeves to minimise binding
and noise and are constructed from only the highest grade steels for absolute durability
and performance.
As an alternative to total replacement of leaf spring packs, Pedders offers a leaf spring resetting service
that involves inserting a new and higher rated leaf into the spring pack which is then re-set to the desired
ride height.
Pedders Suspension provides a comprehensive two-year, 40,000km nation wide warranty on Pedders brand-name products designed for road use, including shock absorbers, struts, springs and steering gears.#
#Some exceptions apply. Please contact your local store for further information.
WARRANTY