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Fabtron Precision Fabrications
B2B ENGINEERING TOOL • SHEET METAL CALCULATOR

Precision Sheet Metal Bend Deduction & K-Factor Calculator

Calculate Bend Allowance ($BA$), Outside Setback ($OSSB$), and Bend Deduction ($BD$) in real time. Use these exact parameters in SolidWorks, PTC Creo, or AutoCAD to generate flat pattern laser cut blanks before brake forming.

Formula Set EMPIRICAL DIN 6935 Neutral Axis Shift
Materials AL • SS • CS • TI Default K-Factors
Output Units INCHES / MM Decimal Precision
Tool Calibration TRUMPF MATCHED Plainville Shop Floor
Fast-Track CAD Intake → View Machine Specifications Direct: (860) 410-1801

Interactive Bend Parameter Calculator

Adjust material, thickness, inside bend radius, and bend angle below.

LIVE MATH
Calculated Blank Flat Pattern Dimensions:
Bend Allowance (BA) 0.1979 in
Outside Setback (OSSB) 0.1800 in
Bend Deduction (BD) 0.1621 in

Flat Pattern Blank Length Rule: Total Flat Blank = Flange A + Flange B − Bend Deduction ($BD$).

Verify Flat Pattern with Fabtron Engineering Staff →
TECHNICAL SPECIFICATIONS & COMPLIANCE

Frequently Asked Engineering Questions

Detailed answers regarding our Plainville facility capabilities, material certifications, testing protocols, and defense contract compliance.

Q: How does K-factor differ from Bend Deduction?

K-factor is a dimensionless ratio ($t/T$) representing the shift of the neutral axis inward during plastic deformation. Bend Deduction ($BD$) is the total linear dimension subtracted from the sum of both flange lengths to arrive at the flat blank cut length.

DIRECT EXECUTIVE ENGINEERING CONSULTATION

Ready to Discuss Your Fabrication Requirements?

Speak directly with Garret Maino and our Plainville manufacturing engineering staff. Upload drawings for immediate DFM analysis and quotation.

Submit CAD Drawings → Call Plant: (860) 410-1801