Four - roller bending machine has four rollers, the up roller is main drive connect with reducer and oldham coupling to provide torque for rolling plate;the under Roller makes vertical lifting movement, four-roller plate rolling machine use reducer worm ,worm ,worm gear  (bevel gear) and female screw to clamp plank,and it is mechanical transmission;There are two side rollers on the each side of up roller ,side rollers make tilting movement by transmission of Silk female screw , worm and worm gear or bevel on the frame rail, four-roller rolling machine are all adapted Rolling bearing.The advantages is this machine one time loading can complete two side of Sheet metal's pre-change and rolling cylinder,arc work by one time loading, it aslo can shape and adjust sheet metal along with pre-bending,convenient and safe material function four - roller bending machine has high precision and small motor power and easy to maintain.

Advantage of Four- roller plate rolling machine:

1. Full hydraulic pressure drive, energy-efficient (driving power is 60% of the traditional)
 
2. Permanent lubrication technology (Don't need to add refuel during the lifetime of bearing )
 
3. Adjustable clamping pressure (there is no sliding, the productivity is 50% to 80% higher than the three-roller bending machine).
 
4.Can roll barrel which diameter is 1.1 times of the up roller .

W12 series four -roller rolling machine performance and features:

1. The machine structure in four rollers, up roller is main drive,tooth Tuo mesh cog by output of the reducer to provide torque for rolling material.

2. The under roller make vertical lifting movement, hydraulic oil in the hydraulic cylinder act on piston to Clamp plank.It is hydraulic transmission.

3. The sides of under roller is equipped with side roller,which make tilting motion on the frame by crew ,nut ,worm gear ,yun rod or hydraulic transmission .

4. The advantage is pre-bending the up part of plate and roll round at same time..