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Untyred wheels can carry high loads with low rolling resistance when used on a hard surface such as flat steel. On softer surfaces, such as concrete or tarmac, the surface is likely to be worn or indented by the use of an untyred wheel. Untyred wheels are noisier in operation than tyred wheels, but noise is unlikely to be a problem at walking speeds.
MATERIAL: Cast iron to BS1452: 1977: Grade 200.
OPERATING TEMPERATURE RANGE:
Plain bored or keywayed wheels - 30°C to 250°C
Ball or taper roller bearinged wheels - 30°C to 120°C
Alternative bore/bearing diameters and alternative bearing types (i.e. bronze bushes, self-lubricating bushes, roller bearings, spherical roller bearings, etc.) are available to order - see ´Design Data´ para. 6.0.
For wheels of larger diameter or greater load capacity see the ´Cast Iron Flat Tread - Heavy Duty´ (CFT) series and ´Steel Flat Tread´ (SFT) series.