Blogs

A double belt sandwich conveyor carries material between two belts pressed together, so the load rides an incline an open surface could never hold. This first guide to the method explains how clamping actually holds the load, then puts numbers on it: the line pressure that sets the whole design. It looks at the cargo that suits a clamped pocket, the fine, dry and free-flowing materials that dominate the installed base, and the steep incline envelope of angle, speed and capacity. A comparison with chevron, cleated and sidewall belts marks the boundary where each is the better answer, and the article closes with the cases where a double belt is simply the wrong choice.

Selecting a belt for hard-rock service starts with the ore, not the brochure. This hub works through the four measurements that decide everything: the largest lump at the loading point, the quartz content that sets abrasiveness, the surface moisture or clay fraction, and the free-fall height from the chute. Each is tied to a belt family, from high-tension carcass builds for long overland hauls to multi-ply fabric ones for shorter spans. The load then runs through impact and abrasion at the loading zone, the pulley geometry that quietly shortens belt life, and the idlers and rollers that cost least but decide most. Cleaning, tracking and acceptance checks close the guide.

A wrapped V-belt looks much the same today as it did a decade ago, which is why buyers still award these orders on unit price alone. This guide reads the rubber transmission belt market from the supply side. It explains what a grade name actually promises, how power rating and service factor leave or remove margin, and why one supplier quotes far less than another for the same section. It shows where the days in an eight-week lead time really go, breaks a quotation into its cost blocks, and sets out how batch size and moulds change the arithmetic of a minimum order. Storage, substitution and field practice are covered too.

Most cleated belt complaints arrive as one sentence: it is slipping, or the ribs are coming off, or we are shovelling material out of the boot. This troubleshooting guide splits those complaints into symptoms that can be measured, then traces each one back to its causes. Slippage on an incline has four causes that look identical at the head pulley, and the fix for one quietly worsens another. Profile damage is separated into peeled tips, torn shoulders and bond-line failure under the rib, with a field test that tells a manufacturing bond fault from a geometry fault. Carry-back, tracking asymmetry, unsquared splices, and the rollers and skirts that punish cleated belts, are each covered.

Roller selection on a mining site starts with what will kill the roller first. This guide matches roller grade to the ore, the dust and the water rather than to a price list. It explains how to read ore abrasiveness and particle size before choosing a shell, how sealing classes are chosen for high-fines circuits, and how washdown chemistry and coastal sites change the shaft and end-cap specification. It then ties shell wall, bearing and shaft to load and speed, sets out spacing, trough angle and transition zones in abrasive duty, and lists the deliverables that matter after the roller itself: dimensional records, bearing lot declarations, seal drawings and torque data.

A warehouse conveyor belt is usually bought in a hurry, and the hurry is where the trouble starts. This guide splits the duty into four cases: high-rate sortation and induction, packing and accumulation benches, chilled and frozen transfers, and light cleaning duties. It explains how to specify friction, tracking and static dissipation for sorters, why a general-purpose PVC cover cracks at the load point in a cold store, and how splice type and tension take-up decide belt life on very short centres. Later sections cover hygienic design, construction and joints for warehouse layouts, the rollers and pulleys around the belt, and the belt register a whole building should keep.

Ordering one custom belt is easy; the tenth copy of it, three years later, is where procurement failures surface. This audit works through twelve checks that make a bespoke order repeatable. It opens with drawing release and interface data, then covers tooling, mould and splice control, and the four dimensions that decide tracking: finished length, width, gauge and camber. Later sections take in sampling and first-article approval, compound and carcass traceability, batch consistency across repeat orders, and the marking and packing rules that keep a mixed shipment traceable. Each check is tied to a measurement you can take at goods-in.

Most roller conveyor parts orders start with a photo, a frame width and a quantity, and the line is often down again three weeks later because the shaft flat or the bracket clearance was never measured. This guide covers what to verify before ordering: interchangeability built on a real drawing package, the bearing grade, clearance, grease and seal architecture that decide roller life, and the shaft, end cap and bracket tolerances that move. It then covers tube material and coating selection by environment, wall thickness against load and span, batch consistency and traceability, transport damage, a goods-in routine that fits a shift, and spare ratios and lead times.

A quarry does not buy a belt; it buys tonnes per shift. That is the frame for on-site conveyor services, the work that happens inside the fence line after the specification is agreed. This article sets out the scope and who should own each phase: route survey and duty review, selection and engineering support, installation and tensioning on the first shutdown day, hot splicing and vulcanising including the cooling discipline that decides joint life, inspection that ends in a replacement date rather than a report, and the short spare parts list that covers most emergencies. It closes with reporting, contract terms measured in four numbers, and site safety.

A fire resistant conveyor belt is bought because a risk assessment, an insurer or a mining code demanded one, so sourcing becomes a question of evidence. This guide sets out twelve checks that hold up in real audits, from translating the hazard into a measurable requirement, through the standards behind the claims and what each one actually tests, to reading a fire test certificate in a fixed order without being fooled by its formatting. It then covers batch consistency through mixing and cure records, how duty shapes vetting, the commercial terms that quietly relax a specification, and the documents, packing and handover that keep a rated belt rated.

Food-line drives do not live the life a general timing drive does. Washdown, alkaline foam, caustic at 92 C, chill tunnels and constant changeover change what the belt must survive. This article separates compliance into three arguments - washdown and cleaning, antimicrobial protection, and metal-detectable construction - each with its own evidence trail, then moves to pitch selection (T5 and T10 trapezoidal against AT variants), backing and cover choices for release, grip and hygiene, and cord selection for humid rooms. It closes with sonic tensioning, the sanitation window, tracking and drive architecture, transfer point design, and a grade matrix with an ordering checklist.

A PVC belt rarely fails on price; it fails on a number nobody verified. This guide reads the specification sheet field by field: total thickness, base fabric and tension member, where fabric weight per ply sets breaking strength and elongation; coating compound, plasticiser content and food-contact declarations; hardness quoted with no test method; and the temperature window that shifts effective hardness on a hot line. Cleats, sidewalls and profile height follow, together with splice method and joint efficiency, tolerances and test reports, incoming inspection and batch consistency across repeat orders. Tables list the questions to ask a supplier and the documents to request.