Bend Deduction

Bend deduction, abbreviated as BA, is the amount of material needed to be removed to achieve the correct length.

 

Bend deduction formula

\(\large{ BD = 2 \; \left( r \;+\; t \right)  \; tan \; \left( \frac{\theta}{2} \;-\; BA \right)  }\)

Where:

Units	English	Metric
\(\large{ BD }\) = bend deduction	\(\large{in}\)	\(\large{mm}\)
\(\large{ BA }\) = bend allowance	\(\large{in}\)	\(\large{mm}\)
\(\large{ \theta }\) (Greek symbol theta) = bend angle	\(\large{deg}\)	\(\large{rad}\)
\(\large{ r }\) = inside radius	\(\large{in}\)	\(\large{mm}\)
\(\large{ t }\) = material thickness	\(\large{in}\)	\(\large{mm}\)