Technical Delivery Conditions Magnets

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Technical Delivery Conditions Magnets Prepared by Meier Pascal Prepared on 21.02.2013 Last changed on 14.07.2016 Last changed by Meier Pascal Doc. no. / version Bo 1200 / 1.

1 Technical Delivery Conditions Magnets Prepared by Meier Pascal Prepared on Last changed on Last changed by Meier Pascal Doc. no. / version Bo 1200 / 1.1 Related documents See chapter 4 TABLE OF CONTENTS 1 Revision history Fundamentals Scope of application Normative references Explanations Assessments Safety instructions Freedom of hazardous substances... 7

2 1 REVISION HISTORY Change date Adjustment Editor Version First version R.Meier Adaption to the company structure / adaption of P.Meier 1.1 layout / update of individual points Technical Delivery Conditions (Version 1.1) Page 2 of 7

3 2 FUNDAMENTALS These «Technical Delivery Conditions» shall constitute an overview of the quality requirements and specifications for magnets of Bomatec Group. Also specific criteria for the definition, classification and evaluation of quality characteristics in connection with magnets shall be specified. 3 SCOPE OF APPLICATION These «Technical Delivery Conditions» apply for all magnets delivered by Bomatec Group. The «Technical Delivery Conditions» apply in case of missing or unclear drawing specifications for magnet requests, orders and delivery in addition to customer drawings. In the case stated before these «Technical Delivery Conditions» have to be seen as additionally applicable document. We would like to point out that we assume no liability for any requirements exceeding these «Technical Delivery Conditions», which have not been clearly communicated by the customer. 4 NORMATIVE REFERENCES The «Technical Delivery Conditions» incorporate provisions from other publications by dated or undated references. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. In case of dated references, subsequent amendments or revisions of these publications are only included in these «Technical Delivery Conditions» if they have been formally incorporated by an amendment or a revision. For undated references the latest edition of the normative document referred to applies. DIN ISO General Tolerances for Linear and Angular Dimensions without Individual Tolerance Indications DIN ISO General Tolerances for Shape and Position without Individual Tolerance Indications DIN ISO Workpiece Edges with Undimensioned Shape DIN EN Magnetic Materials Part 5: Permanent Magnetic Materials (Hard Magnetic Materials) Method for Measuring the Magnetic Properties DIN Magnetic Segments for Small Engines; Limits of Visible Defects Technical Delivery Conditions (Version 1.1) Page 3 of 7

4 5 EXPLANATIONS 5.1 Dimensional tolerances For dimensions without tolerance indication DIN ISO m applies. Dimensions smaller than 0.5 mm, which lack tolerance indication will also be treated according to DIN ISO 2768-m (in the array of mm). 5.2 Shape and position tolerances According to DIN ISO K. Key plots, hexagons, slots, side-drilled holes etc. can t be produced aligned with each other, if angular indication is missing. 5.3 Angular tolerances For all angles without tolerance indication a tolerance of ± 2.0 applies. For chamfers with an edge length < 0.5 mm an angular tolerance of ± 5.0 applies. For chamfers and fillets without tolerance indication the following length tolerances apply: Nominal dimension up to 0.2 mm ±0.1 mm Nominal dimension over 0.2 to 0.5 mm ±0.2 mm Nominal dimension over 0.5 to 1.0 mm ±0.3 mm Nominal dimension over 1.0 mm ±0.4 mm 5.4 Undimensioned workpiece edges For all undimensioned workpiece edges the following applies (see DIN ISO 13715): Outer edges Inner edges mm mm Specifications such as "sharp edge, free of burrs", "sharp edge", and "free of burrs" edge transitions/chamfers are assumed according to DIN ISO with ± 0,05 mm, which means that either a minimal edge breakage or a minimal burr is allowed. At the molding part line and tool ventilation < 0.1 mm are allowed. Connected drill holes, e.g. drill crossings at side-drilled holes, may have an offset of max. 0.5 mm. In case a burrfree transition is required, this needs to be defined. 5.5 Surface quality Spalling, edge breaks, splintering and porous areas are not influencing the result of the surface quality determination. 5.6 Adhering particles / component cleanliness Due to the production processes and material properties loose particles and magnetic dust might adhere to the surface of permanent magnets and magnetic systems. This might, in particular, be Technical Delivery Conditions (Version 1.1) Page 4 of 7

5 the case for magnetised permanent magnets. This is normal and no reason for complaint, unless otherwise defined. 5.7 Magnetic properties Unless otherwise agreed the magnetic parameters listed on our website and our datasheets apply for our magnetic materials. These values are evaluated with uncoated sample pieces according to the norm DIN EN Mechanical damage of permanent magnets Sintered materials are porous. Thus mechanical damages can easily occur on magnets. It can t be excluded that thin hair cracks and spallings exist. These damages are normal and have no significant influence on the mechanical stability of the magnet. Unless otherwise specified these damages are no reason for complaint, as long as our internal specifications are met. 5.9 Permissible spallings and edge breaks of permanent magnets Unless otherwise agreed spallings of up to 2% concerning the respective cross-sectional surface are allowed. Cross-sectional surface Area break max. 2% of the crosssectional surface 5.10 Permissible hair cracks of permanent magnets Unless otherwise agreed hair cracks of up to 1/3 of the affected magnet length are allowed. Hair cracks max. 1/3 of the affected length. affected magnet length 5.11 Permissible damages of ferrite segment magnets Due to the material properties and the geometric shape mechanical damages might occur on ferrite segment magnets. Unless otherwise agreed the provisions of the norm DIN Part 1 apply. Technical Delivery Conditions (Version 1.1) Page 5 of 7

6 5.12 Edge breaks and spallings of ferrite segment magnets Unless otherwise agreed the limit values of the norm DIN Part 4 apply Porous parts of ferrite segment magnets Unless otherwise agreed the limit values of the norm DIN Part 4 apply Cracks in ferrite segment magnets Unless otherwise agreed the limit values of the norm DIN Part 4 apply Shrinkage-cavity formation Unless the magnetic and mechanical properties / requirements are influenced, the formation of cavities are allowed for our permanent magnets Dependence on geometry of composite magnets In a cavity smaller volumes with large-surface geometry cool faster than large volumes. The magnets specific density might fall below the minimum value. As the specific density is related to the remanence flux density, changes might also occur concerning this aspect Corrosion protection of passivated magnets Bomatec Group grants a corrosion protection of 6 months after production date for their passivated magnets. Passivation is a short-term protection for transport and storage (under usual Middle-European surrounding conditions of T < 30 C and rel. humidity < 70%), which protects the magnets very efficient against environmental influences such as e.g. temporarily increased humidity. A secure long-term protection against corrosion can only be achieved by coating Packaging / transportation damages The packaging including secondary packaging must be chosen in a way that a secure protection against transportation damages and pollution is assured. If the customer is refusing specific packaging suggestions, which would protect the products securely against transportation damages and pollution, the customer needs to accept that transportation damages and pollutions of the products might occur. These damages are not compensated by Bomatec Group. 6 ASSESSMENTS All testings of the magnets performed by Bomatec Group and our suppliers are conducted according to state of the art processes. Any test procedures used by the customer without agreement of Bomatec Group exclude Bomatec Group s liability in case of quality-related complaints. The compliance with quality assurance agreements, supplier requirements etc. can only be confirmed by a mutual written agreement and for the applicable version at the time of contract conclusion. Bomatec Group assumes that an incoming goods inspection is performed by the customer. Technical Delivery Conditions (Version 1.1) Page 6 of 7

7 7 SAFETY INSTRUCTIONS At you can find detailed information about the handling of permanent magnets. 8 FREEDOM OF HAZARDOUS SUBSTANCES During the initial sampling phase all automotive customers receive a material datasheet with information about the composition of the product. Bomatec is also creating an entry in the «International Material Data System» (IMDS) in which the respective product, all used materials and proportionate material components are listed and all relevant data is registered, which is required for the later recycling of the product. The automotive customer can retrieve this entry, if he is registered in IMDS. The compliance with the following provisions is assured for all our magnetic products: REACH Conformity Certification Our products and the packaging contain no substances of the Candidate List (current version) according to Article 59 (1) of the Provision (EC) No / 2006 about 0.1 mass percent. RoHS Conformity Declaration (according to ISO/IEC ) RoHS Directive 2011/65/EC (on the restriction of the use of certain hazardous substances in electrical and electronic equipment). Exceptions according to 2011/65/EC, Annex III. Technical Delivery Conditions (Version 1.1) Page 7 of 7

- Hard ferrite magnets -

- Hard ferrite magnets - 1. Application and purpose 2. Definitions 3. Characteristic material properties 4. Geometrical dependency 5. Permitted deficiencies 6. Coating 7. Safety instructions 8. Health risks 9. Freedom from pollutants