strip steel for shock absorber shims(s st017 eng.july.2008)

7/31/2019 Strip Steel for Shock Absorber Shims(S ST017 ENG.july.2008)

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Strip steel forshock absorber shims


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Switch to Sandvikshock absorber steel andbring your shock absorbersup to superior standard


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Fewer shims, same damping

Thanks to Sandviks close tolerances, you can haveewer shims in the stack without losing any shockabsorbing capability, which can be an eective way oreducing costs while simpliying the shock absorbers.

More shims, more profit

However, i you choose to add more shims usingSandviks shock absorber steel, youll be able to oera better shock absorber that can be ftted to moreadvanced vehicles, and this will be reected in theprice your customers pay. In this way, Sandviks closetolerances can indirectly contribute to your productdevelopment.

Switching to Sandvik shock absorber steel is often the

easiest way to improve the condition of your shock

absorbers. The closer the tolerances of the shock

absorber steel, the more control you have over the

oil flow and the damping curve.

When each shim is of the same thickness and

flatness, all the shock absorbers will have consistent

performance, even if they are not manufactured atexactly the same time. In other words, you get better

control over the damping curve, while your customers

enjoy a more comfortable ride, improved road holding

and enhanced safety.


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The shims are at the

heart of the shockabsorbers themselves,and crucial for roadhandling and safety.

Magnus DanekMANAGER, R&D AND RACING,

AUTOMOTIVE, HLINS SWEDEN


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For more than 30 years, hlins has been manuactur-ing shock absorbers or various sports cars and is now

market leader in the felds o racing, rally, road racingand motocross. Its strong reputation on the racetrack means that its bright yellow springs can now beseen on high-end road cars such as Lotus and PaganiZonda.

The shims are at the heart o the shock absorbersthemselves, and hlins imposes extremely stringenttolerance requirements to ensure that all the shockabsorbers on a single vehicle behave identically. Interms o thickness, the specifed tolerance is T4, whichmeans that a shim with a thickness o 0.200 mm musthave a maximum variation o plus or minus ourthousandths o a millimetre!

We have tried several shock absorber steel supp-

liers throughout the years, but so ar only Sandvik hassucceeded in satisying our requirements, explainsMagnus Danek, Head o R&D and racing, Automo-tive, hlins Sweden.

Having spent 18 years at hlins, Magnus Danekknows how important it is or theory and practice togo hand in hand. Even i you have the best project

engineer in the world, no model alone can tell youhow a vehicle will behave when it hits a specifc pot-

hole in a dirt track or in a sand dune out in the desert.Thereore, practical tests must be carried out on theroad or track beore the fnal product goes to market.

I I go out to a orest, or example, to test shockabsorption in a rally car, I must be able to rely on theshim thickness being correct. A hundredth o a milli-metre either way can cause leakage, which in turn canaect road holding and saety.

However, bearing in mind that a component asimportant as the shims represents such a small part othe shock absorber's total cost, hlins sees no reasonto choose an inerior steel.

On the contrary, says Magnus. A good steel withclose tolerances gives us scope to increase or decrease

the number o shims in the stack as required, withoutcompromising on quality.


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The shims are among the most important

components for the operation of the shock

absorbers, while representing a relatively small

proportion of their total cost. Therefore,

choosing a shock absorber steel that guarantees

optimal shock absorber performance is virtually

a matter of course.

Sandvik is a world leading steel company, and the only steelmanuacturer able to supply shock absorber steel with a T4*thickness tolerance and P2* atness tolerance. This meansthat each shim is o identical thickness and atness, allowingthe oil to ow precisely where you want it.

* T4 means that a shim with a thickness o, or example, 0.20-0.25 mm, has athickness tolerance o 0.004 mm. P2 corresponds to a tolerance o 0.3% othe bandwidth.

When it comes to close tolerances,no one beats Sandvik


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Sandvik Group

The Sandvik Group is a global high technology enterprisewith around 300 subsidiary companies, 38,000 employ-ees and activities in more than 130 countries. Sandviksoperations are concentrated on its three core businesseso Tooling, Mining and Construction and SandvikMaterials Technology areas in which the group holdsleading global positions in selected niches.

Sandvik Materials Technology

Sandvik Materials Technology is a worldleading suppliero products with extensive added value in advanced

stainless steels, special alloys, metallic and ceramicresistance materials as well as process plants basedon steel conveyor belts, and sorting systems.

Quality assurance

Sandvik Materials Technology has a quality managementsystem approved by internationally recognised organisa-tions. We hold or example: ASME Quality SystemCertifcate as Material Organisation, approvals to ISO9001 and QS 9000 as well as approvals rom TV, JISand other organisations as a materials manuacturer.


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Sandvik Materials Technology

SE 811 81 Sandviken, Sweden, Phone +46 26 26 30 00, Fax +46 26 26 02 59

www.smt.sandvik .comS-

ST017-

ENG.

July2008.

PrintedinSweden.

ABSandvikensTryckeri.

strip steel for shock absorber shims(s st017 eng.july.2008)

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