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B – Molded Rubber. Hardness: 80 Shore A. (-20ºC to + 70ºC). Produced with molded vulcanized rubber tread over a grey cast iron wheel center. They roll softly with a low noise level, absorb shocks and vibrations. They are resistant to abrasion and chemicals. They can be used at a speed of up to 20km/h when mounted with ball bearings.
NHT – Fiberglass-reinforced Thermoplastic Compound. Hardness: 85 Shore D. (-20ºC to + 220ºC). Produced with a fiberglass-reinforced engineering thermoplastic compound. Indicated for utilization in high and low temperature applications. They are light and have an excellent mechanical resistance, roll very easily, requiring less effort in maneuvering and handling. Resistant to greases, oils, and some kinds of acids.
BD – Molded Rubber With Stamped Plate Wheel Center: 80 Shore A. (-20ºC to + 70ºC). Produced with solid rubber tread, with zinc-plated stamped carbon steel wheel center. They are light and resistant, soft and quiet rolling and are indicated for light duties on floors in good conditions. Nominal working speed is up to 4km/h.