Technical requirements for brake wheels:

①The surface quenching hardness of the rim is 35～45HRC, and the depth is 2～3mm.

②200 forged steel for material D≤45mm

Those with D≥250mm are ZG340-570.

③The keyway type, size and tolerance are in accordance with GB/T 3852-97 "Coupling shaft hole and connection type and size".

Markup example:

Brake wheel 200—Y60 JB/ZQ 4389—86

200—Brake wheel diameter, mm

Y—cylindrical shaft hole