Bentonite ROI Calculator

For many foundries, bentonite is viewed as a routine consumable. However, even a small improvement in bentonite performance can significantly reduce production costs, improve casting quality, and increase overall profitability.

The real question isn’t “What does bentonite cost?”

It’s “How much does poor bentonite performance cost your foundry every month?”

This guide explains how to calculate the return on investment (ROI) of using the right bentonite and why focusing only on price per tonne can lead to higher overall manufacturing costs.

Why ROI Matters More Than Price

Many purchasing decisions are based on the lowest material price.

However, bentonite influences almost every stage of the green sand casting process.

A higher-performing bentonite may help reduce:

• Casting rejects
• Scrap rates
• Sand additions
• Production downtime
• Labour for rework
• Energy consumption
• Water consumption
• Machine stoppages

The savings often outweigh any increase in raw material cost.

How Bentonite Affects Production Costs

A quality bentonite improves:

Green Compressive Strength

More consistent mould strength reduces mould failures.

Surface Finish

Improved mould integrity reduces cleaning and machining.

Casting Yield

Fewer defects mean more saleable castings.

Bentonite Consumption

Higher-performance bentonite may achieve the same results with lower addition rates.

Sand Reclamation

Better binder performance supports longer sand life.

Bentonite ROI Calculator

Estimate your potential savings using the following information.

Step 1: Monthly Sand Consumption

Example:

• Total moulding sand used per month
• Bentonite addition rate (%)

Step 2: Bentonite Consumption

Example:

• Tonnes of bentonite consumed monthly
• Average purchase cost per tonne

Step 3: Casting Reject Rate

Record:

• Current reject percentage
• Estimated improvement after optimisation

Even a 1–2% reduction in reject rate can represent substantial annual savings.

Step 4: Production Volume

Enter:

• Number of castings produced
• Average selling price
• Average production cost

Step 5: Calculate Savings

Potential savings may come from:

• Lower bentonite consumption
• Fewer rejected castings
• Reduced rework
• Lower machining costs
• Reduced downtime
• Improved productivity

Example ROI Calculation

Item	Current	After Improvement
Bentonite Consumption	50 tonnes/month	45 tonnes/month
Bentonite Cost	RM1,500/tonne	RM1,500/tonne
Monthly Bentonite Cost	RM75,000	RM67,500
Monthly Savings		RM7,500

Now include defect reduction.

Current reject rate:

4%

Improved reject rate:

2.5%

If monthly production is worth RM2,000,000, reducing rejects by 1.5% could represent tens of thousands of ringgit in recovered production value each month, depending on the cost structure.

Hidden Costs Many Foundries Ignore

The cost of bentonite extends beyond purchasing.

Poor moulding sand performance can increase:

• Scrap disposal
• Furnace remelting
• Energy usage
• Labour hours
• Machine wear
• Delivery delays
• Customer complaints
• Warranty claims

When these factors are included, the lowest-priced bentonite is not always the lowest-cost solution.

When Should You Review Your Bentonite?

Consider reviewing your bentonite if you notice:

• Rising reject rates
• Increased bentonite consumption
• Frequent moisture adjustments
• Poor mould strength
• Sand inclusions
• Metal penetration
• Surface finish problems
• Reduced sand reclamation efficiency

These may indicate an opportunity to improve process performance and reduce costs.

Best Practices for Maximising ROI

To achieve the best return on investment:

• Monitor moisture daily.
• Test green compressive strength regularly.
• Review bentonite addition rates.
• Optimise sand reclamation.
• Track reject trends.
• Compare cost per good casting—not just cost per tonne.
• Conduct periodic process reviews with your bentonite supplier.

How Deltacorp Sdn. Bhd. Helps Foundries Improve ROI

At Deltacorp Sdn. Bhd., we believe the objective is not simply to sell bentonite—it is to help foundries reduce their total production cost.

Our technical team works with customers to:

• Evaluate current bentonite consumption
• Review sand system performance
• Identify opportunities to reduce casting defects
• Improve mould strength and consistency
• Optimise green sand properties
• Lower the total cost per casting

We focus on delivering measurable operational improvements rather than simply supplying raw materials.

Try Our Free Bentonite ROI Calculator

Want to know how much your foundry could save?

Request Deltacorp’s Free Bentonite ROI Calculator.

Simply provide your monthly production data, and our technical team will prepare a customised analysis showing:

• Potential bentonite savings
• Estimated reduction in reject costs
• Expected annual cost savings
• Recommended optimisation opportunities

Discover how small improvements in bentonite performance can deliver significant long-term savings for your foundry.