Removal and final verification consume real labor and can be as important as application on high-feature parts. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.

Does doubling the crew halve elapsed time?

Only if work can be divided without access, coordination, or workstation constraints. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.

Where do reusable plugs go?

Their insertion and removal time is modeled here; cleaning and lifecycle cost belong in material or tooling cost. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.

Should allowance include breaks?

Use the company's work-measurement policy. Do not duplicate planned downtime already handled in scheduling. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.

Should I include reusable caps and plugs in masks per part?

Yes. Count each feature that requires a distinct application and removal action, regardless of whether the item is tape, a cap, a plug or a reusable protector. If one fixture protects several features in a single motion, count that motion according to how the work is actually performed.

How many cycles should I time?

Use enough normal cycles to capture part handling and ordinary variation, excluding only clearly documented abnormal interruptions. New work may begin with a small controlled study, but update the estimate after production operators complete representative batches. Safety-critical verification should remain in the routing even when its time is small.

Abrasive Blasting, Shot Peening & Surface Prep calculator

Abrasive Blast Masking Labor and Elapsed-Time Calculator

Estimate blast masking labor from four observable drivers: part count, masks per part, seconds to apply each mask and seconds to remove each mask. The calculator converts repetitive touch time into batch labor hours and adds documented allowances for setup, verification and normal delay. It also reports masks handled and labor minutes per part, making the estimate easy to challenge with a short time study. Crew size is fixed at one operator for clarity. The tool is intended for caps, plugs, tape patches and similar repeatable protection; complex hand-cut masking should be measured as a separate routing.

What this calculator does

Build masking labor from feature count, application, removal, verification, setup, allowance, and crew size.
Use it for quote labor, crew plan, masking-method kaizen, comparing disposable tape masking with reusable caps or purpose-built fixtures..
Build masking labor from feature count, application, removal, verification, setup, allowance, and crew size.

Formula used

Masking time = parts × masks per part × application and removal seconds, plus fixed setup, verification and allowance.
Fixed secondary assumptions compiled into this release: Verification time: 15 sec / part; Batch setup: 30 min; Handling and verification allowance: 15 %; Masking crew: 2 people.

Inputs explained

Parts: Parts requiring the same masking method.
Masked features per part: Ports, threads, bores, lands, or surfaces individually masked.
Application touch time: Hands-on time to select, position, and secure one mask.
Removal touch time: Hands-on time to remove and dispose or stage one mask.

How to use the result

Best suited to quote labor, crew plan, masking-method kaizen, comparing disposable tape masking with reusable caps or purpose-built fixtures..
The four-input result is conditional on the disclosed fixed assumptions; use a detailed engineering model when they are not representative. Does not select mask materials. Does not validate blast resistance or leakage. Complex cure or dwell times require separate elapsed stages. Complex contours, cure time, reusable-mask cleaning and adhesive failure are outside the four-field model.

Common questions

Why include removal? Removal and final verification consume real labor and can be as important as application on high-feature parts. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.
Does doubling the crew halve elapsed time? Only if work can be divided without access, coordination, or workstation constraints. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.
Where do reusable plugs go? Their insertion and removal time is modeled here; cleaning and lifecycle cost belong in material or tooling cost. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.
Should allowance include breaks? Use the company's work-measurement policy. Do not duplicate planned downtime already handled in scheduling. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.
Should I include reusable caps and plugs in masks per part? Yes. Count each feature that requires a distinct application and removal action, regardless of whether the item is tape, a cap, a plug or a reusable protector. If one fixture protects several features in a single motion, count that motion according to how the work is actually performed.

Last reviewed 2026-08-24.