How do you calculate casting cleaning labor cost?

Multiply cleaning labor hours per production hour by the cleaning runtime to get total cleaning hours, then multiply by the burdened hourly rate. With 3 hr/hr, 8 hr runtime, and $38/hr, that is 24 cleaning hours costing $912.

What is a burdened cleaning labor rate?

It is the grinder or snagger's wage plus payroll taxes, benefits, PPE, supervision, and consumables like grinding wheels and cutoff discs. Using base wage alone typically understates true cleaning cost by 35 to 60 percent.

Why is cleaning labor so high in a foundry?

Gate and riser removal, fettling, and surface grinding are still largely manual and vary with gating system design. A casting with a big riser or many in-gates can need 3 or more cleaning hours per production hour, as in the default.

How can I lower casting cleaning labor?

Redesign gating to break off cleaner, add automated cutoff or robotic grinding, improve shakeout, and tighten shot-blast cycles. Cutting the ratio from 3.0 to 2.0 hr/hr on this run would drop cost from $912 to $608.

Cleaning labor cost vs melt cost: which matters more?

It depends on alloy and complexity. For high-volume gray iron, melt energy often dominates; for intricate steel or stainless castings, manual cleaning labor frequently exceeds melt cost per part.

Does this include shot blast and inspection?

Only if you fold those hours into the cleaning-hour ratio. The formula is agnostic about which tasks count, so define your cleaning-room scope consistently across quotes.

Foundry & Forging calculator

Casting Cleaning Labor Calculator

Casting Cleaning Labor measures the burdened labor dollars a foundry spends in the cleaning room (gate and riser removal, grinding, shot-blast handling, snagging) for a given production run. In sand and investment foundries this is one of the largest controllable post-pour costs, often rivaling melt energy. Cost estimators and plant managers use it to load finishing labor into the per-casting price and to catch when manual cleanup is eating the margin. Because cleaning is people-intensive and hard to automate, a small change in the cleaning-hour ratio moves the whole run cost.

What this calculator does

Estimate cleaning, cutoff, grinding, fettling, and finishing labor cost for castings.
Use it when cleaning room labor affects cost per casting, quote margin, or schedule capacity.
It computes the burdened cleaning-labor cost of a run by multiplying cleaning hours per production hour by runtime, then by the fully burdened hourly cleaning rate.

Formula used

Casting Cleaning Labor consumed = cleaning labor hours per hour of production × cleaning runtime
Casting Cleaning Labor run cost = consumption × burdened cleaning labor cost

Inputs explained

Cleaning labor hours per hour of casting production:
Cleaning department runtime this run:
Burdened cleaning labor cost:

How to use the result

Use it when quoting a new casting, building a standard cost, or auditing why finishing labor on a job ran over budget.
It assumes a steady cleaning-to-production hour ratio; castings with heavy gating or weld-repair can spike the ratio mid-run and break the linear estimate.

Current U.S. benchmarks

As of Jun 2026, average hourly earnings in U.S. manufacturing are $30.27 (BLS), up 4.4% from a year earlier. Burdened shop rates typically run 1.3 to 1.8 times earnings once benefits and overhead are loaded.
The producer price index for steel mill products stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 3,569 primary metal manufacturing establishments employing about 354,911 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate casting cleaning labor cost? Multiply cleaning labor hours per production hour by the cleaning runtime to get total cleaning hours, then multiply by the burdened hourly rate. With 3 hr/hr, 8 hr runtime, and $38/hr, that is 24 cleaning hours costing $912.
What is a burdened cleaning labor rate? It is the grinder or snagger's wage plus payroll taxes, benefits, PPE, supervision, and consumables like grinding wheels and cutoff discs. Using base wage alone typically understates true cleaning cost by 35 to 60 percent.
Why is cleaning labor so high in a foundry? Gate and riser removal, fettling, and surface grinding are still largely manual and vary with gating system design. A casting with a big riser or many in-gates can need 3 or more cleaning hours per production hour, as in the default.
How can I lower casting cleaning labor? Redesign gating to break off cleaner, add automated cutoff or robotic grinding, improve shakeout, and tighten shot-blast cycles. Cutting the ratio from 3.0 to 2.0 hr/hr on this run would drop cost from $912 to $608.
Cleaning labor cost vs melt cost: which matters more? It depends on alloy and complexity. For high-volume gray iron, melt energy often dominates; for intricate steel or stainless castings, manual cleaning labor frequently exceeds melt cost per part.

Last reviewed 2026-05-12.