Henny said:l I seem to get more help from you guys on here that the actual tutors at college.
Always mark one end of the pipe, this is called the fixed point. From there measure the length you require, your example 160mm, then take off twice the tube diameter which is 30mm if using 15mm copper tube. From this point ie 130mm from the fixed point insert copper tube with the fixed point sticking out the right end of pipe benders (which is refered to the front of the pipe bender). Align the mark (130mm) so that it is in line with the edge of the former, use a set square sitting on the guide touching edge of former and make sure marked point of 130mm is in line with set square edge. Then just bend pipe. one end will be 160mm as required. If you want other end to be to a specific measurement and are not allowed just to measure and trim off excess then what you first need to do is add the two measurements you are given ie 160 and 220, take off twice the pipe diameter (30mm for 15mm copper tube). the length of pipe you will need will be 160+220-30=350mm. Now when you bend as above instructions on 160 length the remainding tube will be exactly 220 on the other end. Try it if you don't believe me..it will work because I just tried it in my workshop to be sure. Finally join the copper club at www.ukcopperboard.co.uk and you'll get a free cd rom which will be invaluable in passing the practical and written exams you'll be doing.There giving us a length of pipe which is say 450mm and telling us they want a 90 degree bend, one side being 160mm & the other being 220mm with only minimal pipe to play with. There is a formula wher you measure the first length, in this case 160mm and then you add twice the diameter or radius orrrrrrr 4 times the diameter. It's horses for courses and we have to do it but I just don't know the formula??????
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