2002-6-4 2002-6-4 All Devin roller shafts are machined of certified 1141 stress-proof steel on the latest CNC lathes. Every one of our shafts are certified for strength and accuracy. Simply the best available on the market. Most popular types. 30102 text/html 1.0 EN concrete mixer truck parts concrete drum roller shafts smith tl smith london devin devin mfg Concrete Mixer Truck Roller Shafts text