This part specifies the basic requirements for dimensions, material and hardness, appearance and surface roughness, performance test, marking and packaging of circular dies. This section applies to round dies produced according to GB/T 970.1.
GB/T 970.2-2008 Referenced Document
GB 443 Lubricating oils for total loss systems L-AN
GB/T 970.1 Circular screwing dies.Part 1:The types and dimensions for circular screwing dies and die stocks