Stock Allowance Calculator

Determine the proper web and edge allowances between blanks for a robust, feedable strip layout.

Webs (between parts) and bridges (part to strip edge) keep the strip strong enough to feed without tearing or sagging. Too little allowance and the carrier collapses; too much wastes material.

Allowances scale with thickness and part size, with a practical minimum so thin material still carries.

Formula: Web / bridge ≈ 1 to 1.5 × Material Thickness (≥ ~0.040 in)

Worked Example

  1. For 0.060 in stock, use a web of about 1.25 × 0.060 = 0.075 in between parts.
  2. For very thin stock, hold a minimum of roughly 0.040–0.060 in regardless of the multiplier.

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