Department:

Quality Assurance presenting its state-of-the-art testing facilities

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Dresselhaus, stands for long-time tradition and innovation.

Supreme quality demands, qualified personnel and continuous investments in the future make sure that Dresselhaus ranks among the most successful distributors of screws and fastening elements in Europe.

Dresselhaus has made considerable investments to develop and expand the QA department. This is one of the reasons why more and more well-known companies are deciding in favour of Dresselhaus.

The following pages are intended to provide you with an insight into the Dresselhaus QA.

Measuring room 1

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Micro-Vickers hardness testerDetermination of surface hardness

To determine surface hardness, carbonisation or decarbonisation and course of hardening, we use the Micro-Vickers hardness tester.

Surface roughness measuring instrumentDetermination of surface roughness

The determination of surface roughness is executed by using the surface roughness measuring instrument according to DIN EN ISO 3274.

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Measuring room 1

Profile projector Measuring of length, radius and angle

This measuring device provides an exact determination of length, radius and angle. It allows a measuring accuracy of 0.001 (one thousandth).

Hardness testing machineCore hardness test

According to several DIN standards the hardness of fixings and engineered items is inspected, e.g. the core hardness test of bolts.

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Measuring room 1

Optical microscopeTo evaluate the microstructure and to determine carbonisation as well as partial decarbonisation, polished specimens are examined under the optical microscope.

Axial run-out measuring deviceAccording to either DIN EN ISO 4759 or drawing parameters, run-out tolerance deviations are determined.

Concentricity gaugeAccording to either DIN EN ISO 4759 or drawing parameters, straightness, deflection and concentricity are measured.

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Measuring room 1

• Micrometer gauge• Measuring pins/gauge block• Thread inspection• Inside micrometer

Besides the testing equipment listed above, further conventional measuring devices, such as vernier calipers and indicating thread gauges, are available in the field of length testing technology.

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Measuring and inspection equipment

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Measuring room 1

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Microscopical inspection

Stereo microscope for the metallographic inspection of fasteners and components.

3D stereo microscope with advanced depth of field to illustrate fractured surfaces, cracks etc.

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Measuring room 2

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Universal testing machine

Tensile- and pressure tests

Using this universal testing machine, tension- and traction tests on bolts and turned-out samples with proof loads of up to 600 kN, and proof load tests on nuts can be executed.

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Measuring room 2

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Optical emission spectrometer This device is used to determine the chemical composition of metallic materials.

Universal testing machine up to 2.5 kNUsing this universal testing machine, tensile tests with proof loads of up to 2.5 kN can be performed on bolts.

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Measuring room 2

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Screw testing stand Using this inspection device, the screw-in characteristics of screwed connections are identified in accordance with VDI 2230 by optional determination of the following parameters: pre-tensioning, tightening torque, angle of rotation and friction coefficient.

X-ray fluorescence spectrometerTo determine the layer thickness of metallic, electrolytically and non-electrolytically applied zinc- and zinc flake coatings we use the X-ray fluorescence spectrometer.

O-ring gauge To determine the diameter of o-rings.

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Laboratory/sample preparation

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Fully automatic programmable mounting press

Fully automatic materialographic sample preparation with microprocessor-controlled automatic grinding- and polishing agent feed.

Grinding and polishing machine

Cutting machine

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Laboratory/sample preparation

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Digital photometer

Chrome-VI determination in metallic surfaces

By using this method the proportion of chrome-VI in metallic surfaces can be illustrated.To achieve a fast result, a spot test can be employed.

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Measuring room 3

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Salt spray test

Neutral salt spray test for corrosion resistance of metallic surfaces

The salt spray test is employed to determine corrosion resistance.

This examination is carried out according to DIN EN ISO 9227.

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Work room

Screw-in test benchHere the screw-in times of different types of fasteners are determined.

Torque wrenchFollowing VDI 2230, for example breaking torque and bolting-up torque can be determined.

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Coordinate-reading-microscope

CNC controlled video coordinate-reading-microscope with 8x magnification and a measuring range of 200x100x100 mm.

Allows fully-automated measuring of standard components as well as special parts including a subsequent

analysis facility.

Measurement precision is 0.003 mm.

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3D coordinate gauge

Workpieces can be checked accurately and economically with the 3D coordinate measuring machine.

In addition to the common coordinates for length, width, and diameter, e.g. tolerances for form and position (according to DIN ISO 1101), such as axial and radial run-out deviation, parallelism, straightness, angularity, perpendicularity, symmetry, etc. can be determined and evaluated.

The metering precision is 0.003 mm.

A special software makes sure that the measuring results can be displayed graphically.

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This insight into our QA indicates that Dresselhaus keeps on investing in quality and safety.

A large number of positive customer audits and evaluations prove that Dresselhaus has always been and will remain a strong partner for the industry.

For the management system in accordance withBS OHSAS 18001 : 2007

For the management system in accordance withDIN EN ISO 14001 : 2009

For the management system in accordance withDIN EN ISO 9001 : 2008

For the management system in accordance withVDA 6, part 2 - Services -

Mountings for non-preloadedstructural assemblies

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The Dresselhaus application consultants and technicians have many years of experience in the field.With their know-how and expertise they are at your side as your individual contacts persons.

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Application support and engineering

Günther HesseCertified Engineer

Herford

Tel.: +49 (0) 5221 932-277Fax: +49 (0) 5221 932-12 277hesse@dresselhaus.de

Karsten BartelsHead of Quality AssuranceCertified EngineerDGQ-Quality InspectorDGQ-Auditor Quality

Herford

Tel.: +49 (0) 5221 932-337Fax: +49 (0) 5221 932-12 337bartels@dresselhaus.de

Alexander KretschmerGraduate Engineer

Urbach

Tel.: +49 (0) 7181 805-380Fax: +49 (0) 7181 805-475kretschmer@dresselhaus.de

Peter OswaldHead of Quality Assurance

Schwabach

Tel.: +49 (0) 9122 9972-21Fax: +49 (0) 9122 9972-88p.oswald@dresselhaus.de

Rolf HorlacherHead of Quality AssuranceCertified EngineerDGQ-Quality InspectorDGQ-Auditor Quality

Urbach

Tel.: +49 (0) 7181 805-395Fax: +49 (0) 7181 805-345horlacher@dresselhaus.de

Carsten GieskerHead of Quality Management

Herford

Tel.: +49 (0) 5221 932-336Fax: +49 (0) 5221 932-12 336c.giesker@dresselhaus.de

Stefan KasparekHead of Quality AssuranceMetalworking ForemanDGQ-Quality InspectorDGQ-Auditor Quality

Maisach

Tel.: +49 (0) 8141 956-127Fax: +49 (0) 8141 956-139kasparek@dresselhaus.de

Helmuth KnoblochCertified EngineerCertified DSV-Engineer for screw technology

Herford

Tel.: +49 (0) 511 4 00 6305Mobil: +49 (0) 1 51 12 19 80 43h.knobloch@dresselhaus.de

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PLM - Product Lifecycle Management

Through the application of a PLM software a structured data management is guaranteed.

A significant advantage is the optimization of tracing documents and a simultaneous data interchange with them.

A documented filing system as well as a modification history is a substantial quality feature of the PLM system.

Data filing and exchange of drawings is carried out either in 2D or in 3D formats.

We manage all documents like drawings, initial sample reports, approvals ect. in this database our customersare granted access to.

Introducing the trend-setting PLM system indicates one more time that Dresselhaus provides a permanent investmentin a good and fruitful cooperation with you.

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Trainings and seminars

At regular intervals Dresselhaus offers seminars and trainings to inform customers about current topics, trends and technologies.

Competent presentations given by well-known consultants ensure fascinating lectures that will stay in the memory of the participants for a long time.

Dresselhaus workshops are becoming more and more popular and have become a fixed component in providing our customers with up-to-date information.

Joseph Dresselhaus GmbH & Co. KGBefestigungstechnik • BeschlagtechnikIm Hengstfeld 18 · D-32657 Lemgo-LiemeTel.: +49 5261 77988-0Fax: +49 5261 77988-400E-Mail: systeme@dresselhaus.de

Dresselhaus Münchener Schraubenhandel SchwabachSpitalwaldstraße 19 · D-91126 SchwabachPostfach 1769 · D-91107 SchwabachTel.: +49 9122 9972-0Fax: +49 9122 9972-88E-Mail: msh.schwabach@dresselhaus.de

Dresselhaus Münchener SchraubenhandelFrauenstraße 37 · D-82216 MaisachPostfach 100 · D-82213 MaisachTel.: +49 8141 956-0Fax: +49 8141 956-222E-Mail: zent-msh@dresselhaus.de

Dresselhaus Stuttgarter Schraubenhandel Wasenmühle 8 · D-73660 UrbachPostfach 1109 · D-73656 UrbachTel.: +49 7181 805-0 Fax: +49 7181 805-475E-Mail: zent-ssh@dresselhaus.de

Headquarters

Joseph Dresselhaus GmbH & Co. KGBefestigungstechnik • BeschlagtechnikZeppelinstraße 13 · D-32051 HerfordPostfach 1464 · D-32004 HerfordTel.: +49 5221 932-0Fax: +49 5221 932-400E-Mail: info@dresselhaus.deInternet: www.dresselhaus.de

Foreign companies

Dresselhaus France SARLParc Industriel le Rond Bois · F-57650 FontoyTel.: +33 382827950Fax: +33 369208100E-Mail: info@dresselhaus.fr

Dresselhaus Çetin Civata Pazarlama Ticaret Ltd. Şti.İstiklal Mah.Atatürk Cad.Ekin Sokak No.434522 Kıraç/Esenyurt/İstanbul/TürkiyeTel.: +90 212 689 38 00Fax: +90 212 689 9160E-Mail: info@dresselhauscetin.com.tr

OOO „Dresselhaus“Obuhovskoy Oborony pr. 271 A office 217192012 St. Petersburg, RusslandTel.: +7 812 633-30-35Fax: +7 812 633-30-36E-Mail: info@dresselhaus.ru

Distribution partners

Sünkel Schrauben GmbHOT Weischau 16 · D-96242 SonnefeldTel.: +49 9562 9831-0 Fax: +49 9562 9831-24 E-Mail: info@suenkel-schrauben.de

Sünkel Śruby Sp. z o.o.ul. Świerczewskiego 50 · PL-66304 BrójceTel.: +48 95 7429830 Fax: +48 95 7429834E-Mail: suenkel@suenkel-cue.com

Sales offices

Joseph Dresselhaus GmbH & Co. KGBefestigungstechnik • BeschlagtechnikKurt-Fischer-Straße 15 a · D-22926 AhrensburgTel.: +49 4102 4923-0Fax: +49 4102 4923-22+45E-Mail: vkb-ahrensburg@dresselhaus.de

Joseph Dresselhaus GmbH & Co. KGBefestigungstechnik • BeschlagtechnikStraße des 17. Juni 25 · Gebäude 103 BD-01257 DresdenTel.: +49 351 21810-60 Fax: +49 351 21810-65E-Mail: vkb-dresden@dresselhaus.de

Locations

Joseph Dresselhaus GmbH & Co. KGBefestigungstechnik • BeschlagtechnikAlte Chaussee 64 · D-32825 Blomberg-DonopTel.: +49 5236 899-0 Fax: +49 5236 1720E-Mail: systeme@dresselhaus.de

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