Pro-Tools HMP-200 - Manual (Page 5)

BENDING INSTRUCTIONS
IN THE NEXT FEW PAGES, WE ARE GOING TO TRY TO EXPLAIN A FEW THINGS ABOUT BENDERS & GIVE
SOME EXAMPLES & EXPLANATIONS ON MAKING BENDS.
WE ARE GOING TO TAKE YOU THROUGH 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 FOLLOW:
THE THCIKER THE WALL SIZE AND THE SMALLER THE DIAMETER OF THE TUBING BECOMES, THE
BETTER THE BEND.THIN WALL TUBING WILL FLATTEN SOMEWHAT ON ITS OUTER 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.
BEFORE WE START WITH BENDING CALCULATIONS WE ARE GOING TO LIST A FEW ITEMS OF
IMPORTANCE.
813-986-9000 Pro-Tools PAGE 5
PIVOT POINT MUST BE LUBRICATED.
(ALL PURPOSE WHEEL BEARING GREASE
WORKS VERY WELL.)
DANGER!
ROLLER
2” MIN.
WHEN BENDING, DO NOT LET THE END OF THE
FOLLOW BAR GET ANY CLOSER THAN 2” FROM
THE EDGE OF THE ROLLER. IF NECESSARY,
RELEASE THE TENSION ON JACK & SLIDE BAR
BACK.
THREADED ROD
AFTER INSTALLING DIE & FOLLOW BAR,
REMOVE “PLAY” BY UNSCREWING
THREADED ROD IN JACK UNTIL TIGHT,
NOT BY PUMPING THE JACK.
BENDER FRAME SHOWN
CUT OFF FOR ILLUSTRATION
PURPOSES ONLY.
ALWAYS INSTALL DIE IN
LOWEST HOLE POSSIBLE.
SMALL DIE INSTALLATION