Size	Width	ET(Offset)		Center bore （hub bore）		Bolt Pattern（PCD）
18	7.5J/8J/8.5J/9J/9.5J/10J/10.5J/11J/12J	You can customize any data and color you need.
19	8.5J/9J/9.5J/10J/10.5J/11J
20	8.5J/9J/9.5J/10J/10.5J/11J/12J
21	8.5J/9J/9.5J/10J/10.5J/11J/12J
22	8.5J/9J/9.5J/10J/10.5J/11J/12J/14J
24	9.5J/10J/10.5J/11J/12J

The difference between free forging and mold forging   Free forging is to place the heated metal blank between the upper and lower irons of the forging equipment, and apply impact or pressure to directly deform the blank, so as to obtain a processing method for the required forging parts. Free forging is simple, flexible in operation, suitable for the production of single, small batch, and large forging parts. Freedom forging is divided into manual free forging and machine free forging. Hand-free forging has low production efficiency and high labor intensity. It is only used to repair or produce simple, small and small batch forgings. In modern industrial production, free forging has become the main way for forging production, and it plays a particularly important role in heavy machinery manufacturing.   Model forging is called mold forging, which is to form the heating of the blanking material in the forging mode fixed on the mold forging equipment.   Model forging can be performed on various devices. In industrial production, the steam air hammer is mostly used for forging of the upper model of the hammer head, with a tonnage of 5kn ~ 300kn (0.5 ~ 30T). Thermal mold pressure machine is often used for mold forging on the pressure machine, with a tonnage of 25000kn ~ 63000kn.   The forging model structure of the mold includes single-mode Hall forging and multi-cavity forging models. It is a single-mode Hall forging model, which uses the dovetail groove and oblique wedge to fix the forging model to prevent it from falling out and left and right. With the cooperation of the key and key slot, the forging mold positioning is accurate to prevent back and forth. Generally, the single-mode bore is the final forging model. Forging often requires the air hammer blank, and then the hammer of the final forging module has been hit for forming multiple times, and the forging part is removed to cut the flying edge.