Pro-Tools MB-105 - Manual (Page 7)

PAGE 7
QUALITY PRODUCTS BY PEOPLE WHO CARE (813) 986-9000
BENDING INSTRUCTIONS
IN THE NEXT FEW PAGES, WE ARE GOING TO EXPLAIN A FEW THINGS ABOUT BENDERS
& GIVE SOME EXAMPLES & EXPLANATIONS ON MAKING BENDS.
WE ARE GOING TO TAKE YOU THOUGH A STEP BY STEP PROCEDURE SHOWING YOU
HOW TO DETERMINE THE STARTING POINT OF YOUR BEND, HOW TO CALCULATE THE
LENGTH OF TUBING YOU NEED TO START WITH, AND AS MANY WAYS AS POSSIBLE
FOR YOU TO BE ABLE TO PRODUCE PROFESSIONAL, ACCURATE BENDS.
THE GENERAL RULE, AS FAR AS THE QUALITY OF THE BEND IS AS FOLLOWS:
THE THICKER THE WALL SIZE AND THE SMALLER THE DIAMETER OF THE TUBING
BECOMES, THE BETTER THE BEND. THIN WALL TUBING WILL FLATTEN SOMEWHAT ON
ITS OUTTER DIAMETER. THIS IS COMPLETELY NORMAL FOR ANY BENDER OTHER THAN
A TRUE MANDREL BENDER. A MANDREL BENDER USES A STEEL BALL OR SIMILAR
SHAPED DEVICE WITH AN OUTSIDE DIAMETER SLIGHTLY SMALLER THAN THE INSIDE
DIAMETER OF THE TUBING BEING BENT. THIS HAS THE EFFECT OF THINNING THE WALL
THICKNESS ON THE OUTSIDE OF THE TUBING. HOWEVER THE ROUNDNESS OF THE
TUBING IS PRESERVED ALMOST PERFECTLY. EXHAUST HEADERS ARE BENT WITH
MANDREL BENDERS. IF A COMPANY TELLS YOU THEIR BENDER IS A MANDREL BENDER
AND IT DOES NOT USE INSIDE MANDRELS, BEWARE!!! TRUE MANDREL BENDERS ARE
EXTREMELY EXPENSIVE.
STEP1 THE TUBING FOR OUR TEST IS 1 1/2” x 36” LONG. ONLY ONE PIECE IS
NECESSARY TO GIVE YOU ALL THE INFORMATION YOU WILL NEED TO MAKE
ACCURATE BENDS. IT IS A GOOD IDEA TO KEEP A NOTEBOOK TO LOT YOUR
INFORMATION ON THE TEST BEND. IT WILL BE NECESSARY TO RUN THE
SAME TEST FOR EACH SIZE TUBING YOU PLAN TO BEND.
NOTE: EACH SIZE OF TUBING; BENDS, STRETCHES, & USES A
DIFFERENT AMOUNT OF TUBING IN THE BEND, SO IT WILL BE
IMPORTANT TO LOG THE RESULTS FROM EACH TEST.
ALSO, ALWAYS KEEP ALL PINS AND ANY “METAL TO METAL” PARTS ON THE
BENDER WELL LUBRICATED. THIS WILL GREATLY REDUCE THE AMOUNT OF
FORCE NEEDED TO OPERATE THE RATCHET, AND WILL ALSO PREVENT
UNNECESSARY WEAR.
36”