Angle · inside radius · thickness · K factor
Single-bend allowance
Inputs
User-entered included bend angle; bend geometry and sequence are not inferred.
User-entered inside radius; tooling and bend method are not selected.
User-entered thickness; material condition and tolerance are not derived.
User-entered neutral-axis ratio; no material, tooling, or process K-factor selection is performed.
Results
Literal single-bend allowance
2.3562
Literal single-bend deduction
1.6438
Literal neutral-axis radius
1.5
Declared bend angle
90
BA = θ·(π/180)·(R + K·T); BD = 2·(R + T)·tan(θ/2) − BA
A first-pass number, not a code check, certification, or approval. Read the method and its limits below. What this is and is not.
Nearby: Milling removal rate · Drilling speed & time · Turning material removal · Milling cutting parameters
Method
Formula, when it applies, and when it does not
Apply single-bend angle, inside radius, thickness, and K factor to bend allowance and deduction arithmetic without selecting material, tooling, or a bend process.
BA = θ·(π/180)·(R + K·T); BD = 2·(R + T)·tan(θ/2) − BA
When
- Single declared bend
- User-entered inside radius, thickness, and K factor
- Geometric allowance and deduction relation
- No bend-method or material model
Don’t
- This applies only the stated single-bend allowance and deduction relations to user-declared angle, inside radius, thickness, and K factor. It does not select material, K factor, tooling, bend radius, bend method, process sequence, multi-bend flat pattern, tolerance, manufacturability, cost, capacity, safety, suitability, or approval.