BLICKLE - wheels and castors Page 48
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Wheels and castors guide Blickle wheel series info box Tread and tyre hardness. Smooth operation and floor preservation. Tread and tyre hardness 65 Shore A Smooth operation and floor preservation excellent Rolling resistance very good To make it easier for you to choose the correct product, we provide a Blickle info box for each wheel series on the relevant page. This provides an overview of the tread and tyre hardness of a wheel, its smooth operation and floor preservation, rolling resistance and wear resistance. Tread and tyre hardness is rated on a scale from very soft to very hard, while the other categories are rated from satisfactory to outstanding. Wear resistance good Blickle wheel series info box Tread and tyre hardness The tread & tyre hardness is indicated in the info box in images on the product pages. The further the marking is to the right, the harder the tread. Hardness for There is no linear correlation between the various hardness testing methods. The values in the graphic were determined empirically and are provided for reference purposes. Material Pneumatic tyre / soft rubber Elastic solid rubber • elastomers and polyurethanes is provided in Shore A, • Shore D for solid plastics and • using the Brinell scale for metals. Super-elastic solid rubber Standard solid rubber Thermoplastic polyurethane (TPU), soft Thermoplastic rubber-elastomer (TPE) Polyurethane 75 Shore A Polyurethane 92 Shore A Hardness ranges for Blickle wheel series Shore A Shore D 0 0 50 65 95 19 46 Thermoplastic polyurethane (TPU), hard 100 Polypropylene 100 90 Brinell HB 450 180 230 soft hard Nylon Cast nylon Cast iron / steel Tread and tyre hardness ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ 50–60 Shore A 65 Shore A 70 Shore A 80 Shore A 80 Shore A 85 Shore A 75 Shore A 92 Shore A 92–98 Shore A 60 Shore D 70 Shore D 80 Shore D 180–230 HB Smooth operation and floor preservation The higher the score in this category, the quieter the wheel is and the easier it is on surfaces. Floor preservation Hard treads put more strain on a floor than softer treads. A tread with five points in the smooth operation and floor preservation category has exceptionally good floor preservation qualities. Hard wheels can also be used with low levels of noise and a high degree of operational comfort when transporting light loads on a soft surface (e.g. carpet). Calculating average floor pressure The average floor pressure is calculated by dividing the radial force [N] by the wheel contact surface [mm²]. Floor surface preservation is measured on the basis of average floor pressure. Reference values for each tread material are provided to the right. Smooth operation In principle, vehicles tend to be quieter when they have large wheels with soft thick treads. Hard treads result in higher levels of noise than soft treads. A high score in the smooth operation and floor preservation category would therefore lead to expect low levels of vibration and noise emission when transporting goods. Material Pneumatic tyre / soft rubber Elastic solid rubber Super-elastic solid rubber Standard solid rubber Thermoplastic polyurethane (TPU), soft Thermoplastic rubber-elastomer (TPE) Polyurethane 75 Shore A Polyurethane 92 Shore A Thermoplastic polyurethane (TPU), hard Polypropylene / nylon Cast nylon Cast iron / steel 48 we innovate mobility Smooth operation / floor preservation ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ ■■■■■ Average floor pressure 0.8 N/mm² 1.8 N/mm² 1.5 N/mm² 3.5 N/mm² 4.0 N/mm² 4.5 N/mm² 3.5 N/mm² 8.0 N/mm² 11.0 N/mm² 40.0 N/mm² 60.0 N/mm² >350 N/mm² www.blickle.com
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