What is a trolley conveyor and when do I need one?

A trolley conveyor (also called overhead conveyor) is a track-based conveyor where products hang from trolleys riding on a continuous overhead track. You need one when products need to move through finishing processes - paint, powder coating, drying ovens - that floor conveyors cannot handle because the product needs to be accessible from all sides while moving. You also need one when floor space is scarce: an overhead conveyor frees the floor below for operators, assembly fixtures, parts staging, and equipment. Common applications are automotive paint and assembly lines, appliance manufacturing, powder coating shops, and any production line where parts flow through multiple process stations while staying suspended.

Monorail vs power-and-free - which configuration should I choose?

Monorail uses a single track where all trolleys move together at one synchronous speed, driven by a continuous powered chain. Simpler mechanism, lower cost, best for paint lines and simple finishing where every product follows the same sequence at the same pace. Power-and-free uses a dual-track system - one powered track and one free track - where each load-carrying trolley can stop and start independently. This enables asynchronous flow, accumulation, buffering between workstations, and routing through multiple process branches. Higher complexity and cost, but essential for automotive assembly and any application where products need to stop at individual stations without halting the line. SANAM specifies the right configuration based on your process flow, throughput, and accumulation needs.

What loads and product weights can the trolley conveyor handle?

Load capacity scales with track size and trolley engineering. Light-duty enclosed-track monorails handle 25-50 kg per pendant - small parts, garments, light components. Medium-duty configurations handle 100-200 kg per trolley - appliance bodies, paint racks loaded with parts, sub-assemblies. Heavy-duty I-beam trolley conveyors handle 500 kg to several thousand kg per trolley - automotive bodies, large machinery components, heavy castings. SANAM sizes the track, trolley assembly, chain, motor, and overhead support structure to your actual product weight, dimensions, and throughput rate.

Can the trolley conveyor run through paint ovens? What are the temperature limits?

Yes - paint ovens are one of the two flagship applications named in the catalog. Standard trolley conveyor construction tolerates the elevated temperatures of paint cure ovens, typically up to about 230°C (450°F) with proper high-temperature lubrication. Track, trolleys, chain, and bearings are specified for the maximum oven temperature in your specific application. For ultra-high-temperature curing or specialty coatings requiring more, refractory-grade materials and specialty bearings can be specified during engineering. SANAM coordinates the oven specification with the conveyor specification so the system runs reliably at temperature for the conveyor lifetime.

How does the trolley conveyor integrate with assembly stations and other equipment?

Trolley conveyors integrate with assembly stations, paint booths, ovens, robotic process cells, and quality inspection stations as a continuous overhead flow. Trolley spacing is engineered to position one product at each workstation at takt time; in power-and-free configurations, trolleys can stop at individual stations without halting the line. The catalog explicitly names assembly operations as one of two flagship applications. SANAM engineers the load points, unload points, station spacing, and PLC controls to coordinate the trolley conveyor with the rest of your production line as a single synchronized system.

Material Handling Conveyor

Trolley
Conveyor

The conveyor that runs above your factory floor — trolleys on a continuous overhead track suspending products through paint ovens, powder coating booths, and assembly lines. Available in monorail for synchronous paint and finishing flow, and power-and-free for asynchronous assembly with accumulation. Temperature-tolerant for paint cure up to 230°C. Frees the floor below for operators and fixtures.

Code OHC

Operation Monorail or Power-and-Free

Built Egypt — 10th of Ramadan

Overhead Track Manual or Motorized Paint + Assembly

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SANAM trolley conveyor — overhead track conveyor with trolleys moving products through paint ovens, powder coating, and assembly lines installation in Egypt

OHC · Trolley Conveyor

Key Features

What Makes a SANAM
Trolley Conveyor
Different

Six things that set a SANAM-built trolley conveyor apart from a generic imported solution — every one of them a decision we make at the engineering desk before fabrication begins.

Suspended Above the Working Area

The whole point of going overhead — products travel on the ceiling level, the floor below stays free for operators, fixtures, fork trucks, and parts staging. The docx names this as the defining value of trolley conveyor systems. Critical anywhere floor space is the binding constraint.

Trolleys on Continuous Track — Manual or Motorized

Trolleys ride on a continuous overhead track in a closed loop. Drive is either manual push (light-duty, short runs) or a motorized chain pulling the loop at one synchronous speed. The docx confirms both options. SANAM specifies the drive based on your load weight, line speed, and operator tolerance.

Horizontal and Vertical Movement on One Track

The track climbs, drops, and turns in the same loop. The docx names horizontal and vertical movement as one capability — products travel laterally between stations, climb to an upper level, drop into an oven, then climb to inspection, all on one continuous track. Vertical curves handle the elevation changes mid-loop.

Built for Paint Ovens — Temperature-Tolerant

One of two flagship catalog applications — the conveyor runs through paint ovens with the product still hanging from it. Track, trolleys, chain, and bearings specified for the oven temperature, typically up to 230°C with high-temperature lubrication. SANAM coordinates oven and conveyor specs so both run reliably for years.

Handles Awkward Parts, Bodies, and Sub-Assemblies

Belt and roller conveyors fail with irregular shapes — car bodies, motorcycle frames, large castings, appliance shells, garment racks. Trolley conveyors don't care about shape; they suspend from above with hooks engineered to your product geometry. Capacity ranges from 25 kg per pendant up to several thousand kg per I-beam trolley.

Custom-Engineered to Your Product — Not a Catalog Box

Every trolley conveyor is sized to the specific load — product geometry, hook style, weight, throughput, track layout, elevation changes, and process stations. Send us your part drawings, station map, and target throughput — we engineer the track, trolleys, drive, and controls into your plant layout.

Configurations

Two Trolley Conveyor Types — Monorail or Power-and-Free

Monorail moves all trolleys together at one speed — simpler, cheaper, perfect for paint and finishing lines where every product follows the same sequence. Power-and-free lets each trolley stop and start independently — more complex, more expensive, essential for automotive assembly and any line with accumulation, branching, or multi-station routing.

Monorail — Synchronous Single Track

A single overhead track carries all trolleys at one speed, driven by a continuous powered chain. Every product moves through every station at the same pace — no trolley stops independently, no accumulation between stations. Simpler, lower cost, fewer moving parts. The right choice for paint lines, powder coating, drying ovens, and any finishing flow where every product follows the same sequence end-to-end. Light to medium duty: 25 to 200 kg per pendant or trolley.

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Power-and-Free — Asynchronous Dual Track

A dual-track system — one powered track driving a chain above, one "free" track below where each load-carrying trolley runs independently. Trolleys engage and disengage from the powered chain, allowing each to stop at a workstation without halting the line. Supports accumulation, branching, routing through multiple process paths, and asynchronous station times. Essential for automotive assembly, multi-process operations, and any line where products need to stop at individual stations for different durations. Heavy duty: up to several thousand kg per trolley.

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Industries Served

Where the Trolley Conveyor Earns Its Place

Six industries where products move through paint, coating, drying, or assembly processes — and where suspending the workpiece from above is the only way to keep all sides accessible while the line keeps moving.

Automotive Assembly & Paint Lines

Car bodies, motorcycle frames, and large sub-assemblies hanging from overhead trolleys through dip-paint, e-coat, primer, color, and clear coat. Power-and-free for the multi-station flow.

Powder Coating & Surface Finishing

The catalog flagship — افران الدهان. Parts hanging through wash, dry-off, powder application booth, and cure oven at 200-230°C. Monorail for synchronous flow; track designed for the oven temperature.

Appliance Manufacturing

Refrigerator shells, washing-machine cabinets, and water-heater tanks moving from press through wash, paint, cure, and assembly. Egypt has a major appliance industry — Olympic, Toshiba El-Araby, Fresh, Bawer.

Industrial Assembly Lines

The second catalog flagship — حالة التجميع. Multi-station assembly where sub-components are added to a base unit as it moves through the line. Power-and-free supports variable station times.

Textile & Garment Processing

Garments on hangers and finished apparel moving through dyeing, drying, pressing, and inspection. Monorail with enclosed track keeps lint off the chain in textile environments.

Warehouse & Logistics

Overhead transfer of awkward unit loads — drum lifters, oversized parcels, hanging garment shipments. Frees the floor for forklifts and pallet jacks while moving slow-mover product overhead.

Why SANAM

The Conveyor Is Half
the Story. The Team Behind It
Is the Other Half.

Anyone can sell you a conveyor. The question is who picks up the phone six months later when a chain segment fails on a Sunday night.

Egyptian OEM, Not Importer

The conveyor is designed, fabricated, and assembled in our 10th of Ramadan facility — by the same team that installs and supports it. No middleman, no resold equipment, no relabeled imports.

Custom-Engineered to Your Line

We design around your factory floor, your existing fillers and packers, and your container specs. We don't sell standard parts hoping they fit — we design for your line.

Spare Parts in Egypt, in 48 Hours

Spares are typically available within 48 hours from our Egyptian inventory — no import waits, no customs delays, no production downtime while you wait for a chain segment from Europe.

Full System Integration

We don't just supply a conveyor. We connect it to your existing line — matching speed, height, and transfer geometry to your fillers, cappers, labelers, and packers. The line becomes one system, not a stack of disconnected machines.

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Tell Us About
Your Line.

Send us your container type, throughput target, and a sketch or photo of your factory layout if you have one. A SANAM engineer responds within one working day with a scoped technical proposal — no salesperson handoff.

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We review your request within one working day.
An engineer calls you to scope your line and answer questions.
You receive a written proposal with technical details and a budgetary figure.

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Trolley
Conveyor