THE DIAL INDICATOR IS PROVIDED AS A REFERENCE TO WHERE YOU ARE IN THE BENDING PROCESS
IT IS EASIER AND QUICKER TO USE THAN A NUMBERED SCALE
A SCALE OR AN INDICATOR BOTH ARE ONLY USED AS A REFERENCE POINT.
THE ACTUAL RAIL MATERIALS OF DIFFERENT MANUFACTURES ALWAYS VARY IN HARDNESS AND FLEXABILITY FOR ALUMINUM, BRASS OR STAINLESS STEEL AND EVEN FROM RUN TO RUN AT THE MANUFACTURER LEVEL.
OUR CHART IS A REFERENCE STARTING POINT GUIDE ONLY.
***THE CHART IS ACCURATE***
IF YOU CAN FREELY SLIDE THE RAIL BENDER AT THE CHART READING, YOU WILL HAVE ACHEIVED THE DESIRED RADIUS, SO SETTING THE DIAL AT 'ZERO' ON KNOWN STRAIGHT TRACK AND GOING BACK TO TRACK SECTION YOU BENT AND DIALING TO CHART NUMBER WILL ASSURE YOU HAVE ACHEIVED DESIRED CHART RADIUS IF THE RAIL BENDER SLIDES EASILY WITHOUT PRESSURE ON BEARINGS AGAINST THE RAILS.
YOU COULD CHECK THE ACTUAL RADIUS OF TRACK IN THIS MANNER AS WELL