DYNA Engineering

11/06/2026

Steel conveyor rollers are the default across most bulk handling sites, and on many of them that's the right call. Where corrosion, noise, or material adhesion become persistent problems, the maintenance cycle on steel starts to compound — surface treatment degrades, rollers seize earlier than expected, and replacement frequency climbs. Some sites in aggressive environments are turning steel rollers over on an 18 to 24 month cycle.

DYNA's HDPE Composite rollers use a glass fibre reinforced HDPE tube and composite bearing housing with a multiple labyrinth seal arrangement. The glass fibre reinforcement is what separates them from plain HDPE — it extends load capacity and wear resistance into higher-duty applications where plain HDPE would be under-specified. They carry the same noise and corrosion advantages as plain HDPE: no surface treatment required, up to 10dB quieter than steel, and non-magnetic for use in metal detector and magnet zones.

They're suited to mining, mineral processing, and long-distance conveying where steel generates ongoing surface treatment costs and plain HDPE doesn't have enough in it for the application.

On your site, has corrosion or noise been the primary driver when HDPE rollers have come up as an option?

More on the product in the blog: https://www.dynaeng.com.au/blog/hdpe-and-grhdpe-composite-conveyor-rollers/

DYNA Engineering explains how HDPE and GRHDPE composite conveyor rollers reduce corrosion, noise, and maintenance costs compared to steel rollers.

09/06/2026

Most conveyor audits get scheduled after something has already gone wrong, or when a shutdown reveals more deterioration than expected. The components that get inspected are usually the ones that have already flagged — which means the ones building toward failure quietly tend to get deferred until the next opportunity.

"There have been quite a few occasions over the years where we have saved our customers hundreds of thousands of dollars in maintenance and repair costs through early detection of impending breakdowns due to wearing out or damaged conveyor componentry," Thomas Greaves said.

A structured audit run as a planning tool produces a different output. DYNA's reports document specific component condition and estimated remaining service life across the system — belt thickness, tracking, idler frame alignments, pulley alignment, impact zones, safety guards — not just the section already showing symptoms. That gives maintenance teams something to schedule against: parts on order before they're needed urgently, shutdown windows allocated to known priorities.

"Knowing the likely life left before replacement will be required on major conveying componentry means maintenance supervisors can plan fewer shutdowns for optimum efficiency and avoid expensive, unplanned stoppages. It's like being able to see around corners," Greaves said.

Audits are conducted under AS1755-2000 Conveyor Safety and tailored to scope — component-level, problem area, or full system.

More detail in the blog - https://www.dynaeng.com.au/blog/conveyor-auditing-provides-prevention-rather-than-cure/

Our feature article in the Australian Bulk Handling Review is an overview of the reasons why conveyor auditing is more cost effective.

05/06/2026

The repainting cycle on steel under conveyor guards is predictable enough that some sites have it written into the shutdown schedule. Strip the rust, apply primer, recoat, and move on — until the next time.

"Traditional steel guards require surface treatment," Thomas Greaves said. "When a guard's paint comes off during conveyor transportation, it exposes the underlying steel to corrosion. The only real way to fix this is to hand- or spray-paint the guards."

In highly corrosive environments, DYNA is seeing some customers replace steel guards every 18 to 24 months. "Our HDPE guards have a service life of 10 to 15 years. Customers are paying the same price as they would for a steel guard, but the product is lasting five to six times longer," Greaves said.

HDPE doesn't have a surface treatment to maintain. The material is corrosion-proof and UV stable, so the maintenance trigger is removed rather than extended. The UCG mesh design also allows finer, non-hazardous particles to pass through while capturing anything larger — so it's not accumulating material that needs clearing after every rainfall.

More on the blog: https://www.dynaeng.com.au/blog/under-conveyor-guards-that-reduce-corrosion-weight-and-repeat-maintenance/

HDPE under conveyor guards that reduce corrosion, improve access, and last longer than steel in mining environments with manual handling limits. Safer access on site.

04/06/2026

Noise from conveyor rollers showing up as a formal condition in planning documentation is still relatively uncommon, but it's becoming a factor on projects near residential areas or adjacent processing facilities where environmental approval sets a threshold.

Steel rollers generate noise through bearing vibration and the contact between steel components at the idler. HDPE Composite rollers reduce both — the composite material dampens bearing noise, and the contact surface behaves differently under load. DYNA's HDPE and HDPE Composite rollers run up to 10dB quieter than steel. On a conveyor running continuously through the night, that's a meaningful difference. On a project where a noise limit is written into the environmental approval, the roller specification is worth confirming early rather than after the condition surfaces in the review process.

The same rollers that address the noise condition also remove the corrosion and surface treatment maintenance that steel generates in wet environments, so the specification isn't a noise-only decision.

More on the blog: https://www.dynaeng.com.au/blog/why-hdpe-conveyor-rollers-reduce-noise-downtime-and-corrosion-on-site/

HDPE conveyor rollers run quieter, resist corrosion, and reduce repeat roller change-outs in wet and high-duty conveyor applications.

03/06/2026

HDPE conveyor guards are roughly 40 per cent lighter than steel equivalents, corrosion-resistant, and adjustable on site with a jigsaw rather than hot works. Those properties made them an obvious fit for conveyors. They've also found their way into applications nobody originally planned for.

Jetcrete, a ground support specialist, was running steel mesh guards on underground agitator trucks. In tight underground spaces, the guards were regularly bent and damaged and because the steel was rigid, when part of the mesh started fouling with the rotating bowl, contact caused more damage with every revolution rather than deflecting away. Jetcrete approached DYNA about adapting the HDPE conveyor guard design for the trucks. Several sites completed trials. The guards are now commissioned across the fleet.

"That we design, manufacture and fabricate all this in-house here at our own workshop in Bayswater, Perth, is very encouraging," Thomas Greaves said. "And it proves you don't have to be a multinational to make a new mining refinement work and find a market for it."

The same customisation capability applies to conveyor guard specifications — any size and shape, without the slow, labour-intensive process of custom metal fabrication.

More in the blog — link in the first comment.

28/05/2026

When a belt keeps walking to one side and the trainer can't hold it, the fix tends to be whatever keeps it running for the next shift. Rope, wire, something wedged against the frame. It's common enough that most maintenance teams have a version of this story.

The underlying cause usually isn't the trainer. A worn or damaged splice, material build-up on idlers or pulley lagging, a seized roller acting as a brake on one side of the belt — any of these will push the belt off centre regardless of what the tracking hardware does. Worth checking those before replacing anything.

Where the tracking system itself is the problem, traditional pivot-frame trainers have a built-in delay — the belt has to reach the side guide rollers before correction starts, which can cause overcorrection and edge damage. DYNA-TRAC tracking rollers are self-aligning and self-adjusting, using belt forces directly so the correction is continuous rather than reactive. No side guide rollers, and diamond-grooved rubber lagging maintains grip in wet and muddy conditions.

We've written something on this — link in the first comment.

26/05/2026

Ceramic lagging ends up on drive pulleys that don't need it, and plain steel ends up on applications where conditions demand better grip. Both decisions cost more than they should — one through overspecification, the other through early re-lagging because the surface didn't suit the conditions.

Lagging selection follows from drive conditions: belt tension, whether it's a drive or non-drive pulley, how wet the operating environment gets, and what level of traction is needed to maintain slip-free operation. Cold vulcanised rubber suits most drive applications in dry to moderate conditions. Ceramic tile adds grip where the surface is consistently wet or tension demands more. Direct bond ceramic is the step up where standard ceramic would delaminate under the operating loads involved.

Getting the match right reduces re-lagging frequency and extends pulley service life without paying for specification the application doesn't need.

More on this in the blog — link in the first comment.

21/05/2026

Dust at the load zone and spillage under the skirts are usually the first signs that the skirting seal has stopped doing its job. Most sites adjust it, get a few weeks of improvement, and find themselves back in the same position.

Conventional skirting relies on manual adjustment to maintain rubber-to-belt contact as the seal wears. Over-tighten and the belt wears faster. Under-tighten and the seal breaks down. The difference between the two is usually whoever adjusted it last.

Flexiseal® uses an automatic pressure control mechanism that maintains correct contact pressure regardless of belt sag, profile changes under load, or mistracking. When the seal wears out, the quick release system means no adjustments on replacement — the new strip clips in and holds without resetting anything.

More on this in the blog — link in the first comment.

19/05/2026

Conveyor belt cost tends to get looked at as a purchase decision — price per metre, lead time, grade. The operating cost side of it is less often part of that conversation, but on a long or high-duty run it's usually the larger number.

Belt grade selection affects wear rate and how often the belt needs to be replaced. Running an under-specified belt on a high-abrasion application shortens replacement intervals and increases the shutdown time that comes with re-splicing. The matching question — material type, belt speed, load profile, operating environment — is what determines whether the belt earns its cost over its service life.

Splice condition is the other factor that tends to get underweighted. A belt in good condition with a deteriorating splice will fail at the splice. Regular inspection of mechanical fasteners or vulcanised joints keeps that from being a surprise.

More on this in the blog — link in the first comment.

14/05/2026

Material under the return run gets swept up and moved on. When it's back the next day, and the day after, the conversation eventually turns to the scraper. Usually it's worn, or it hasn't been re-tensioned in a while, or access to re-tension it is awkward enough that it keeps getting deferred.

Carryback rarely resolves on its own. Material characteristics, belt speed, discharge conditions, and blade type all affect how much stays on the belt past the head pulley — and so does how easy the scraper is to service in the position it's actually installed.

The DYNAFastFit® scraper is built around that last point: retractable shaft, blade replacement without readjustment, self-aligning bearing housing. It doesn't eliminate every carryback situation, but it removes the access and adjustment excuses from the conversation.

More on this — link in the first comment.