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P490.20
Conveyor belt idlers – Part 3: Performance specifications for troughed belt conveyer idlers (metallic and non-metallic) for idler roller rotational speeds of up to 750 revolutions per minute
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Specifies the performance specifications for troughed belt conveyor idlers that have metallic or non-metallic rolls for idler roller rotational speeds of up to 750 revolutions per minute for belt widths of up to and including 2400 mm.