nosstec 8264, Operating Instructions Manual

8264 English, rev 3

5

operaTion

Prebending

In order to obtain a symmetrically round shape, it is necessary to prebend the front as well as the rear 

edge of the workpiece. This prebending can be carried out by means of suitable equipment e.g. a 

press brake or manual folding machine. 

This operation can not be performed with a 8264 bending roll 

machine.

Bending

This machine shall be used for bending sheets to a round shape. Also cylinders with conical shape can be 

bent if the machine is equipped with cone bending device.
At the maximum operating length and the maximum sheet thickness tubes down to about 1,5 times the 

diameter of the bending roll can be formed and for thinner sheets down to about 1,2 times the diameter 

of the roll.
When bending steel sheet or stainless steel the maximum thickness capacity of the machine will be 

reduced to about 2/3 compared to mild carbon steel sheet.

Bending operation:
The bending roll is screwed up so that the workpiece can be introduced between the bending roll 

and lower rolls. After having cen tered the workpiece in the machine, the bending roll is screwed down 

towards the workpiece so that a bend appears. How much the bending roll must be screwed down 

depends partly on the thickness of the material and partly on the final diameter.
Generally the sheet must be run through the machine several times in order to obtain the desired shape. 

When the work piece has been introduced between the rolls, the machine can be started by means 

of the pedal switch. The workpiece should then be run through the machine until it nearly leaves the 

lower roll. After this the bending roll is screwed down somewhat and the procedure is repeated but 

in the opposite direction by means of the pedal switch. Continue to run the workpiece forwards and 

backwards at the same time as the bending roll is screwed down, until the work piece has obtained the 

desired shape.
In order to get a better cylinder, the workpiece can be run through the machine some extra times, either 

direct after the rolling or after the joint has been welded and emery ground.