Tuning knobs, slide control knobs - OKW - #29

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29 PROPERTIES OF PLASTIC MATERIAL THERMOPLASTICS DUROPLAST Material groups Polyamide PA Styrene-Polymerisate Polycarbonate Phenolic resin Abbreviation PA 6 ABS PC PF Attribute reinforced Application for the following product groups Abbreviation of product groups, see below this page. TK* + CK* (knob only) SK (knob + assembly kit) DK, SRK KKS, accessories KKS Dial SK (illuminated parts) DK Mechanical properties Impact resistance Unit Test method KJ/m2 ISO 179; DIN 53 453 22 – 80 no fracture 6 Notch resistance KJ/m2 ISO 179; DIN 53 453 4 16 11 >30 1 Ball identation hardness N/mm2 DIN 53 456 – – 97 95 250 Module of elasticity N/mm2 ISO 527; DIN 53 457 4.000 2.200 2.300 2.300 – Thermal properties Heat distortion temperature Unit Test method °C ISO 75-A; DIN 53 461 170 90 85 125 125 Application temperature approx. °C 85 80 70 110 100 UL combustibility test Fire classif. UL 94 (wall thickness) – HB HB HB V-1 Electrical properties Tracking resistance CTI Unit Test method Stage IEC 112 450/250 M – 600 250 125 Specific volume resistivity Ohm · cm DIN 53 482; VDE 0303 – 1015 1013 1016 1012 Resistance of material to Simultaneous exposure to different media may alter the resitive properties of a material! To be safe, it is advisable to test the knobs for sufficient resistance of the material under the conditions of the specific application! Gasoline +   – + Diesel oil + + +  + Sea water + + + + + Hydrochloric acid, 10% –   + + Weak alkaline solutions – + + – + Strong alkaline solutions – + + –  Atmospheric influences +   + + Lactic acid  + + + + Acetone + – – –  REFERENCE The plastic properties are exclusively applicable for the specified standard test pieces. Variations may occur as far as cases and technical parts are concerned. This does not exempt you from carrying out your own tests. The application, utilisation and subsequent processing are beyond our control and the responsibility for this therefore rests solely with you. Up-to-date material data sheets are also available in the Internet at www.okw.com ABBREVIATION OF PRODUCT GROUPS CK COM-KNOBS (10-13) DK Tuning knobs (23-27) KKS Combination knobs (14-22) SK STAR-KNOBS (4-7) SRK Slide control knobs (28) TK TOP-KNOBS (8-9) ABBREVIATION OF MATERIAL ABS Acrylonitrile-Butadiene-Styrene PA Polyamide PC Polycarbonate PF Phenolics * Accessories COM-KNOBS and TOP-KNOBS (Marking elements, Covers with/without finger grip) PA 6 unreinforced, except for cover and Peak in colour nero. DESCRIPTION TO RESISTANCE OF MATERIALS Values at room temperature: + = constant  = conditionally constant – = inconstant