Reducing downtime and maximising the life of crane assets with engineered plastics.
Cranes and lifting systems operate in environments that demand constant reliability – high loads, abrasive surfaces, and harsh weather conditions. While steel has traditionally been the material of choice for wear components, advances in polymer engineering are changing the equation. Today, high-performance plastics are helping crane operators reduce maintenance effort, protect critical steel structures, and unlock real cost-of-ownership improvements.
Dotmar Engineering Plastics has been at the forefront of this shift, supplying engineered materials and machined components that deliver smoother, cleaner, and longer-lasting lifting performance.
Self-lubricating protection where it matters most
Products such as Dotmar’s Polystone® M Ultra – a premium ultra-high molecular weight polyethylene (UHMWPE) grade – naturally offer a very low friction profile. Unlike steel, these materials don’t rely on grease to slide smoothly. They reduce drag and galling in telescopic boom systems and keep wear surfaces clean, even in areas where lubrication access is difficult.
This naturally low-friction behaviour improves movement, reduces the frequency of pad changeouts, and keeps crane sections running smoother for longer – with fewer shutdowns interrupting operations.
No corrosion – even in Australia and NZ’s harshest environments
Coastal ports, mining operations, and exposed construction zones take a toll on metal components. Moisture, salt, grit and UV exposure can pit and seize steel over time. Plastics, by contrast, remain dimensionally stable and free from rust.
Grades such as Polystone FM (Fender), which is a recycled UHMWPE, retain predictable wear behaviour throughout their lifespan – meaning parts wear down gradually instead of failing suddenly. For operators, that makes maintenance planning easier and safer.
Protecting the steel that keeps cranes working
Metal-on-metal contact transfers surface damage to the most expensive parts of the crane – the boom structure, the chassis, or the wire rope running through sheaves. Polymer parts act as a sacrificial layer, absorbing abrasion and shock while preserving high-value steel components underneath.
In practice, it means booms last longer before refurbishment, ropes stay in service longer, and sliding sections move more quietly and consistently – improving both safety and operator experience.
Where plastics are making a measurable difference
In mobile cranes, replacing steel slider pads with Polystone M Ultra pads has eliminated lubrication needs for some fleets. Operators who were previously grappling with surface scoring on boom extension points have seen replacement intervals extend significantly, alongside cleaner movement and a marked reduction in noise during lifts.
In overhead gantry applications, nylon sheaves paired with acetal bushings have helped double the lifespan of wire rope in busy manufacturing plants. With lower friction and zero corrosion, cranes operate more smoothly while requiring less intervention from maintenance teams.
Outrigger pads are another strong success story. Plastic outrigger plates from Dotmar are noticeably lighter and easier to handle than steel equivalents, with no rust issues and excellent impact resistance. For crews working on soft or uneven terrain, this makes for safer deployment and greater ground protection.
A smarter financial choice over the crane’s service life
Every hour a crane is offline is costly. With engineered plastics:
• Maintenance cycles become less frequent
• Grease systems and lubrication points can often be simplified
• Component handling becomes safer due to reduced weight
• Major steel components suffer less wear and last longer
• These savings accumulate over years of lifting service – turning polymer upgrades into a strategic investment, not just a maintenance decision.
About Dotmar Engineering Plastics
Dotmar is Australia and New Zealand’s largest supplier of semi-finished engineering plastics, with more than 50 years of materials and machining expertise. It supports both original equipment crane manufacturers and maintenance teams by selecting the right polymer for every load case, machining replacement or upgraded parts to precision tolerances, and ensuring fast delivery from a nationwide footprint. With ISO 9001 certification, Dotmar provides confidence that every part will perform exactly as specified.
The better way to keep cranes lifting
Replacing metal wear components with engineered plastics isn’t about cutting corners – it’s about protecting the most critical parts of lifting equipment. With smoother operation, reduced downtime and enhanced asset longevity, plastics are now the proven path forward for crane performance.
To assess wear components across a fleet or discuss a custom-machined solution, Dotmar’s engineering team is available to offer support from concept through to installation.
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