Written by Paul Montgomery, Marketing Leader at PRAB. Reviewed by [Application Engineering, name/title TBD]. Published [Date]. Last updated [Date].
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Quick Answer Does the material being machined affect which metal scrap conveyor or chip processing system I need? Yes, significantly. Chip morphology, bulk density, abrasiveness, and coolant affinity vary widely by material. Aluminum produces fine, stringy chips with high coolant retention and a high risk of fire. Abrasive cast iron produces brittle dust that accelerates conveyor wear. Stamping scrap creates irregular blanks that jam standard conveyor designs. Each of these requires a different conveyor geometry, chip-processing approach, and coolant-management strategy. Specifying the wrong system for the material being cut leads to premature equipment wear, conveyor jams, coolant recovery losses, and metal chip handling costs that compound over time. |
Generic 
specifications describe throughput in pounds per hour and mention chip types in passing. In practice, a hinge-belt conveyor that performs well on steel turnings can fail quickly on aluminum fines, and a standard drag conveyor that handles cast iron dust will pack and jam on long stringy chips from a bar-turning center.
PRAB engineers have observed these failure modes across thousands of installations. The following sections cover the material-specific considerations that should guide the selection of metal scrap conveyors and chip-processing equipment.
Aluminum machining produces chips that range from fine dust and curled fines to long stringy turnings, depending on alloy, cutting speed, and tool geometry. These characteristics create three distinct challenges.
Fine aluminum chips and dust are combustible. Accumulated aluminum fines in a conveyor trough, combined with heat from continuous operation and coolant chemistry that promotes aluminum oxidation, create a fire risk that is not present with ferrous materials. PRAB conveyor designs for aluminum applications incorporate features that minimize fines accumulation and reduce heat buildup.
Aluminum chips from flooded-coolant operations can arrive at the conveyor discharge with coolant retention significantly higher than that carried by steel chips. This affects the economics of chip resale and the load on the coolant recycling system. PRAB chip wringers for aluminum applications are sized to handle the higher fluid content and recover coolant before it reaches the chip storage bin.
Aluminum fines pass through standard conveyor drain slots into the coolant return and can accumulate in the recycling system’s inlet. PRAB’s application engineers specify filtration and separation equipment at the conveyor stage to reduce fines carry-through before it reaches the Guardian® Coolant Recycling System.
Cast iron produces hard, brittle, angular chips and dust with abrasiveness well above that of ferrous alloys. In a conveyor application, this translates to accelerated wear on hinge plates, flights, and belt surfaces. In a coolant system, cast iron fines generate metallic sludge that clogs filtration media and degrades cutting performance.
PRAB Conveyor: Nearly 50 Years Without a Major Failure
PRAB conveyors specified for cast iron applications use hardened hinge-belt materials and tighter plate-to-plate tolerances to resist abrasive wear that shortens service life in standard conveyor configurations. Customers processing cast iron should ask specifically about wear-rated components and expected belt replacement intervals during system specification.
Cast iron sludge in the coolant return is a primary driver of premature filter media failure and coolant degradation. PRAB’s filtration systems for cast iron applications are specified with higher-capacity settling zones and media designed for metallic fines loading above what typical steel machining generates.
Metal stamping produces scrap that does not behave like machining chips. Blanks, slugs, skeletons, and trim scrap are flat, irregular, and often interlocking. Standard chip conveyor flights and hinge openings are not designed for this material.
PRAB engineers stamping-scrap conveyors with wider apron widths, modified flight heights, and discharge geometry that accommodates irregular piece sizes without bridging or jamming. For high-volume stamping operations, scrap conveyors are typically integrated with baling or briquetting systems that reduce the volume of material to be transported.
Titanium- and nickel-based superalloys generate chips with high hardness, significant spring-back, and chemical reactivity, requiring careful coolant management. Titanium chip fires are a documented risk in high-volume aerospace machining environments.
PRAB metal chip handling systems for titanium and high-temperature alloy applications are specified with:
Through our Demo Before You Buy™ and FREE Materials Testing and FREE Fluid Testing programs, we validate your application and define measurable performance specifications before you purchase.
| FREE Fluid Testing | On-site Demo Equipment | Performantee™ | |
|---|---|---|---|
| ■ Eliminate uncertainty by providing real, tested performance data.
■ Select correctly sized components and configurations ■ Quantify expected ROI and payback timelines ■ Support accurate conveyor, hopper, and system design |
■ Prove that your fluids can be recycled, reused, or treated to meet environmental compliance
■ Solids removal performance ■ Filtration clarity and turbidity reduction ■ Expected throughput and operating parameters – and more |
■ Engineered Confidence, Documented Results.
■ Your materials ■ Your infrastructure ■ Your team ■ De-Risking with on-site and our Kalamazoo, MI Facility |
PRAB’s Performantee is a true performance guarantee. We ensure that our equipment will achieve the specific results for which it was designed and manufactured. If it does not, we will revise, repair, or make any necessary changes to deliver the results you specified. So when you have questions or concerns about the performance of your PRAB equipment. 24/7 Live support. |
The most common cause of metal chip-handling equipment underperformance is a specification written for a generic chip type rather than for the actual material being processed. PRAB application engineers request material type, chip morphology description, or sample photos, production volume, coolant type, and downstream processing or resale targets before preparing a system specification.
If your current chip handling system is experiencing frequent jams, high coolant carry-out losses, accelerated wear, or conveyor downtime that correlates with material type, a material-specific specification review is the right starting point. Contact PRAB to schedule an application review.
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About the Author Paul Montgomery is the Marketing Leader at PRAB, Inc., a KMC Global company. A B2B marketing executive with more than 20 years of experience building and leading cross-functional teams, he has driven significant revenue growth across industrial manufacturing, SaaS, and technology sectors, including 300% YoY growth at TrueCoverage. At PRAB, he leads digital strategy, brand modernization, SEO/AEO, and content initiatives across all five product lines. He holds a B.S. in Corporate Telecommunications from Texas Tech University. Reviewed by [Application Engineering Team, PRAB, Inc.] |
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