When a railcar OEM approached Lehigh Valley Plastics with repeated wear issues on steel-to-steel contact components, it was clear that conventional metal wear pads weren’t cutting it. These parts—particularly on hopper gate assemblies and undercarriage guide plates—suffered from high friction, constant greasing requirements, and monthly maintenance cycles that affected operational efficiency and safety.
Rather than replacing the steel with another metal component, we proposed an advanced material upgrade: Oil-Filled Nylon PA6 infused with Molybdenum Disulfide (MoS₂). This self-lubricating engineered plastic drastically reduced friction and increased the service life of the parts—no external lubrication needed.
Client Profile
- Industry: Railcar Manufacturing & Freight Logistics
- Application: Hopper gate wear pads & undercarriage guide plates
- Operating Conditions:
- Temperature range: -20°F to 120°F
- Load weight per cycle: ~20,000 lbs
- Outdoor, dust/debris-heavy environment
The Challenge
Excessive wear on metal-to-metal contact points created ongoing issues for this OEM:
- Frequent greasing requirements and messy lubrication buildup
- Monthly maintenance and part replacements
- Risk of downtime during critical loading and unloading cycles
- Increased component weight affecting fuel efficiency
The Engineered Solution: Oil-Filled/MoS₂ Cast Nylon PA6
Oil-Filled MoS₂ Nylon is a high-performance plastic compound designed for extreme wear and load-bearing applications. With embedded lubricants and solid MoS₂ fillers, this cast nylon offers excellent dimensional stability, abrasion resistance, and long-term durability in rugged rail environments.
Material Selection Highlights:
- Self-Lubrication: Built-in lubricants eliminate the need for greasing and reduce friction
- High Wear Resistance: Proven performance in sliding, heavy-duty contact zones
- Lightweight: Significantly reduces part weight vs. steel—contributing to better railcar efficiency
- Weather-Tough: Performs in temperature extremes and resists dust and debris intrusion
- Longevity: Outlasts traditional metal wear pads by up to 2x in the same application
Results & Benefits
The client saw immediate and measurable results from the upgraded nylon wear pads:
- Wear life increased 2X compared to metal alternatives
- Maintenance intervals extended from monthly to quarterly inspections
- Reduced total system weight led to better fuel efficiency and cost savings
- Lower total cost of ownership through less downtime and longer-lasting components
“By switching from metal to engineered plastic, our client not only solved a friction problem—they gained a competitive edge in uptime, efficiency, and long-term savings.”
Want to reduce wear and extend service life in your industrial system? Talk to our experts today.
Frequently Asked Questions
What is Oil-Filled MoS₂ Nylon used for?
This advanced cast nylon is used in high-friction, high-load applications like railcar wear pads, bearings, sliders, and guide plates. Its self-lubricating properties make it ideal for environments where regular greasing is difficult or undesirable.
Why replace steel parts with plastic in railcars?
Plastic components like oil-filled nylon reduce friction, resist corrosion, operate quietly, and weigh less than steel. In railcars, this leads to less maintenance, lower operating costs, and improved fuel efficiency.
How long do nylon wear pads last?
In this case study, nylon wear pads lasted twice as long as their steel counterparts, withstanding heavy load cycles and harsh outdoor conditions without needing monthly replacement.
Can MoS₂ nylon perform in freezing or hot weather?
Yes. Oil-Filled MoS₂ nylon maintains structural integrity across a wide temperature range—from -20°F to 120°F—making it perfect for outdoor use in rail, agriculture, and construction equipment.
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