Abrasive Blasting, Shot Peening & Surface Prep calculator
Blast Masking Time Calculator
Masking often drives turnaround when threads, machined lands, seal faces, nameplates, or no-blast zones must be protected before surface prep. This calculator converts the masking workload into labor hours so production can schedule prep work before the blast booth is waiting.
What this calculator does
- Estimate masking labor hours from mask points or linear feet, masking rate, and handling allowance.
- a lead wants to know how long tape, plugs, caps, or hard masking will take before blasting starts
- Returns labor hours needed to mask the job before abrasive blasting or peening.
Formula used
- Base masking time = masking workload ÷ masking rate
- Adjusted masking time = base time × (1 + handling/verification allowance)
Inputs explained
- Masking workload: Use features, plugs, edges, or equivalent linear sections consistently.
- Masking rate: undefined
- Handling/verification allowance: undefined
How to use the result
- Use it when protected surfaces, threads, ports, or coating boundaries drive prep labor.
- Complex geometry, adhesive dwell, mask removal, and failed masking repairs may need separate allowances.
Common questions
- What unit should workload use? Use whatever your shop can count repeatably: plugs, tape edges, holes, faces, or equivalent masking features.
- Does this include unmasking? No, unless your masking rate already includes removal. Add unmasking as a separate labor allowance if needed.
- How should I set the allowance? Base it on handling, drawing checks, customer hold points, and rework history for similar parts.
- Why calculate masking separately? Masking can consume labor while the blast room is idle or blocked, so separating it improves schedule and quote accuracy.
Last reviewed 2026-05-12.