Engineering hub
Engineering · Calculator
Stock allowance calculator.
Per-side stock allowance for finish-machining requirements. Use it when ordering raw stock or specifying preform sizes — too little stock means you can't clean up to spec; too much wastes material and machining time.
Inputs
Recommended stock
Allowance per side
—
Total stock dimension
—
(nominal + 2× per-side allowance)
Surface scale removal —
Finish-pass allowance —
Heat-treat distortion —
Per-side allowance for a single feature. For deep pockets, internal walls, or unusual aspect ratios, increase by 25–50%. For 0.0001″-class final tolerance, add another 0.001″ per side for a precision finish pass.
Keep exploring
Related tools & references
Have a part that needs to be made right?
Tell us about your part and we'll quote within 24 hours. Aerospace, medical, and defense work welcome.
Quotes in 24 hours