Particle size reduction sits at the heart of modern manufacturing. In chemical processing, alternative energy, and industrial minerals, the ability to control particle distribution determines product performance, consistency, and shelf life. Manufacturers across these sectors face relentless pressure to tighten specifications, reduce waste, and maintain output – demands that require both precise equipment and deep processing knowledge.
Our customers range from process engineers evaluating new materials to production managers handling high-volume contract runs and plant engineers managing ongoing maintenance programs. Some need one-time laboratory trials to prove out a material; others rely on us for ongoing toll processing, field maintenance, or replacement components to keep lines running. Whatever the scale or stage, the underlying need is the same: reliable results and a partner who understands the process.
Explore CMS’s full service offering below, from initial laboratory testing and production-scale toll milling to field support and precision replacement components.
Laboratory Testing
Material behavior under milling conditions isn’t always predictable from theory alone. Our test facilities eliminate uncertainty by processing your actual materials through CMS air classifier mills and supporting equipment that mirror production-scale operations. We’ve processed thousands of materials across chemical, food, mineral, and specialty applications, which means potential processing challenges are identified early, before capital is committed to equipment.
Each evaluation delivers:
Product information remains strictly confidential and belongs entirely to your team. Results typically complete within 5 – 10 business days.
Tolling
American Classifier Milling Systems (ACMS) operates a complete materials processing center in Petersburg, West Virginia, specializing in ultra-fine micronized grading. Our toll milling services provide contract processing capacity for manufacturers managing production surges, seasonal demand swings, or specialized equipment requirements they don’t maintain in-house.
We process bulk and specialty materials on a white-label basis – materials arrive at our facility, are processed to your specifications, and return to you without CMS branding. This makes ACMS an ideal partner for manufacturers who need external capacity without customer-facing complications. Processing spans the full size range, from ore crushing to ultra-fine micron sizing:
Fine & micron sizing
Crushing & screening
Training Services
Equipment performance depends directly on operator knowledge. Our comprehensive two-day program is designed to help operators and maintenance teams extract maximum performance from air-swept classifier milling systems, translating classroom fundamentals into hands-on production skills.
Instructors bring over 30 years of hands-on industry experience across chemical, reusable energy, food, minerals, and powder coating applications. Training is not limited to CMS equipment. Our team works with any manufacturer’s air classifier system. Curriculum covers system operation, startup and shutdown procedures, troubleshooting techniques, unique particle size distribution behavior, safety best practices, OSHA compliance, and hands-on lockout/tagout training.
Sessions use a blended format: classroom instruction for theory and system design, followed immediately by hands-on training on the equipment. Each session concludes with a short quiz and written SOPs for ongoing reference. Programs typically span 1-3 days, depending on equipment complexity and operator experience, and can be held at your facility or our technical center.
Field Service & Consultations
Industrial milling facilities operate in high-demand production environments where uptime directly impacts revenue. From process review to equipment installation to emergency repairs, Classifier Milling Systems offers comprehensive field services designed to keep milling operations at peak performance.
With decades of experience across chemical, food, powder coating, and mineral processing industries, we’ve become a trusted partner for manufacturers seeking reliable industrial mill maintenance services and hands-on support.
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Installation & Commissioning
Installation & Commissioning
Bringing new milling systems online involves more than installing machinery. Our full-service commissioning ensures each component – air classifiers, hoppers, dust collection systems – receives careful installation, alignment, calibration, and testing. We coordinate layout, assist with installation, work with vendors and civil engineers, conduct testing, provide training, and complete commissioning so systems meet performance requirements from day one.
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Emergency Service & Scheduled Maintenance
Emergency Service & Scheduled Maintenance
Problems rarely occur at convenient times. We offer 24/7 emergency service to repair breakdowns and minimize lost productivity. Whether it’s classifier misalignment, motor issues, or feed system blockages, our technicians arrive on-site with the expertise and tools to perform thorough diagnostics and targeted repairs.
Beyond emergency response, we provide routine scheduled maintenance: regular inspections, lubrication, component replacements, and system cleanings following industry best practices. Routine maintenance extends equipment lifespan and reduces the risk of sudden failure, keeping screens, rotors, and classifiers operating at peak efficiency.
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Performance Audits & System Optimization
Performance Audits & System Optimization
We provide on-site system optimization through detailed audits focused on improving energy efficiency, product consistency, and throughput. Field engineers review your setup, OEM specifications, and performance benchmarks to identify mechanical misalignments, airflow imbalances, and cut-point deviations. Using real-time testing tools, we verify system performance and identify shortfalls. Audits conclude with detailed technical reports outlining specific steps to reduce power consumption, improve throughput, and reduce unplanned downtime.
Mill Components & Parts
Classifier Milling Systems supplies precision-built mill components and replacement parts that keep air classifier mills operating at target cut points, throughput, and uptime. We provide classifier wheels, liners, rotors, hammers, seals, and bearings for systems ranging from pilot scale to 400 HP, with expedited fulfillment to minimize downtime.
Our engineering team selects parts based on the process variables that most influence classification: airflow, rotor speed, and feed-to-air ratios. This supports stable particle size distribution, limits over-grinding, and manages heat in temperature-sensitive applications.
Classifier wheels (24, 36, 48 vane configurations)
Hammer sets, wear discs, and rotor assemblies
Liners in multiple materials and configurations
Seals, bearings, and spindle assemblies
Quick Clean Rotary Airlock Valves in stainless or carbon steel
Construction materials directly influence milling efficiency and product quality. We construct components from stainless steel, ceramics, tungsten carbide, and other materials known for durability in demanding environments. Precision fits on rotors, seals, and bearings prevent bypass and leakage that widen distributions and reduce efficiency.
Equipment Refurbishment
We provide refurbishment services to extend the life of outdated air classifier mills and restore performance without full replacement costs. Our team evaluates wear on classifier wheels, liners, rotors, and seals where erosion, pitting, and fatigue reduce efficiency. Components can be re-machined to OEM tolerances or replaced with upgraded materials for higher abrasion or heat resistance.
Refurbishment can include modernization of obsolete controls and drives – swapping old systems for variable frequency drives (VFDs) and PLC-based automation for improved cut point stability. This reduces unplanned downtime and improves efficiency at a fraction of the full equipment replacement cost.
Why Partner with
Classifier Milling Systems?
Particle processing challenges don’t wait for convenient timing. Over the past 30 years, we’ve developed expertise in solving size-reduction problems across chemical, food, alternative energy, and mineral processing applications. This experience translates into practical solutions addressing real production constraints.
Our approach combines technical knowledge with responsive service. When you contact us with a processing challenge, you speak directly with engineers who understand both the equipment and the application. We develop recommendations based on your specific materials, throughput requirements, and quality specifications – not generic solutions.
Whether you need laboratory testing to evaluate new materials, toll milling services to handle overflow production, or industrial mill maintenance services to keep existing equipment running, CMS has the technical depth and production capacity to support your program. Contact our team to discuss your specific requirements.