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SR100
RONWIN
The Non-Powered Straight Roller Conveyor (also known as a gravity roller conveyor) is a classic material handling system that requires no external drive. It relies entirely on manual pushing or the gravity component of the load itself to move goods along a straight path. As one of the most widely used types of roller conveyors, it has earned its place as an indispensable "golden partner" in logistics warehouses, manufacturing plants, and e‑commerce sorting centers worldwide – thanks to its ultra-simple structure, reliable operation, and minimal maintenance.
This unit consists of high‑precision free‑turning rollers, a rugged frame, and adjustable legs. It is particularly suited for short‑distance material transfer, workstation linking on assembly lines, packaging operations, and post‑sorting diversion. It consumes no electricity, yet dramatically reduces manual labor intensity – a perfect example of how simplicity can be the ultimate sophistication in industrial handling.
The conveyor is built with a modular philosophy, allowing easy assembly, reconfiguration, and future expansion. The main components are:
| Component | Function | Material / Finish Options (Customizable) |
|---|---|---|
| Rollers | Core load‑bearing and conveying elements, free‑rotating | Galvanized steel, chrome‑plated steel, stainless steel (SUS304), aluminum alloy, PVC, rubber/PU‑coated (anti‑slip) |
| Frame (side plates) | Holds and aligns the rollers | Q235 cold‑rolled steel (electrostatic powder‑coated), 6063‑T5 aluminum extrusion, stainless steel |
| Support legs | Supports the entire unit, height‑adjustable | Rectangular steel tube, aluminum profile, folding type with casters (for mobility) |
| Cross braces | Enhances rigidity and stability | Steel square tube, aluminum connecting profiles |
| Leveling feet | Fine‑tunes height and levels the conveyor | Various model for different load |
| Side guides / guard rails | Prevents load deviation or falling (optional) | Round steel, L‑shaped aluminum, nylon wear strips |
Selection Tip: For humid or cold‑storage environments, choose stainless steel rollers + aluminum frame. If frequent layout changes are expected, the folding leg with casters is highly recommended for quick relocation.
The conveyor operates without motors, gearboxes, or control systems – purely on physical principles:
The operator pushes the load manually. With precision ball bearings, the rollers turn with extremely low resistance, so a single worker can easily move a fully loaded pallet weighing up to 200 kg – significantly reducing physical effort.
The horizontal component of gravity causes the load to slide down automatically, enabling hands‑free, gravity‑powered transport. On longer slopes where speed may become excessive, optional damping rollers or spiral speed controllers can be fitted to ensure a gentle "soft landing" and prevent collisions at the end.
Light loads (cartons < 10 kg) : recommended slope 2.5° ~ 3.5°
Heavy loads (pallets > 50 kg) : 1.0° ~ 1.5° (high inertia, avoid rear‑end impact)
If the floor is perfectly flat but automatic glide is desired, optional wedge shims can be placed under the legs to create a slight inclination.
Zero electricity consumption – operating energy = 0 kWh; supports green and low‑carbon initiatives.
Extremely low initial investment – no motors, VFDs, or control cabinets required; purchase cost is only 20%–30% of a powered conveyor system.
Virtually maintenance‑free – no complex electrical parts; daily care is just cleaning roller surfaces (tape residue, strapping bits).
Fast repair – modular plug‑in roller design; a single roller can be replaced in under 3 minutes without special tools.
Long‑life bearings – sealed precision ball bearings (NSK/SKF/HRB) are dust‑ and moisture‑resistant; only annual greasing (lithium grease) is needed.
Wide load variety – handles cartons, plastic totes, metal bins, drums, pallets, and other flat‑bottomed rigid items.
Versatile layout – horizontal or inclined installation; can be used alone or combined with belt conveyors, chain conveyors, etc., to form complex sorting or distribution systems.
100% reusability – bolted modular construction allows easy disassembly and re‑use when production lines are rearranged.
Ultra‑quiet operation – noise < 35 dB, well below industrial limits; ideal for cleanrooms, electronics assembly, and pharmaceutical workshops.
No nip‑point hazards – no high‑speed moving parts; optional polyurethane bumpers at the end for impact absorption.
Wide temperature range – standard version: ‑5°C ~ +40°C; cold‑storage version: ‑30°C ~ 0°C (with low‑temperature grease and stainless steel bearings).
ESD protection – optional copper grounding chains to dissipate static charge, protecting sensitive electronic components.
Our SR100 series is engineered to strict industrial standards, with the following range of options:
| Parameter | Specifications / Details |
|---|---|
| Model | SR100 (non‑powered straight conveyor) |
| Roller diameter (D) | Φ25, Φ38, Φ50, Φ60, Φ76, Φ80, Φ89 mm (larger diameter = higher load capacity) |
| Roller material | Galvanized steel, chrome‑plated, stainless steel (SUS304), aluminum alloy, PVC, ABS, rubber/PU‑coated |
| Roller pitch (P) | 60, 75, 90, 100, 120, 150 mm (Golden rule: at least 3 rollers must contact the load bottom at all times) |
| Frame material | Carbon steel folded plate (≥2.5 mm), anodized aluminum extrusion, stainless steel |
| Frame inner width (W) | Standard: 420, 500, 600, 700, 800, 900, 1000 mm; custom up to 1500 mm |
| Frame length (L) | Standard: 600, 1000, 2000, 3000, 4000, 5000 mm; custom up to 12,000 mm |
| Frame height (H) | Adjustable range: 300 ~ 1500 mm (recommended working height: 400 mm for ergonomic operation) |
| Max load per meter | Standard: 50 ~ 100 kg/m; heavy‑duty reinforced: up to 1000 kg/m |
| Installation slope | Horizontal (floor flatness < ±0.5°); inclined: ≤ 8° (recommended 1°~3.5° for gravity flow) |
| Ambient temperature | Standard: -5°C ~ +40°C; Cold‑storage version: -30°C ~ 0°C |
| Ambient humidity | ≤ 90% (non‑condensing, frost‑free) |
| Roller mounting type | Spring‑loaded, internal thread, full flat tenon, through‑shaft with pin hole |
| Surface finish | Electrostatic powder coating (RAL color chart fully customizable) |
To streamline communication and ensure accurate delivery, please generate your order number using the following format:
Model no. -rack inner width(W)-rack height(H)-rack length(L)-roller diameter(D)-roller pitch(P)
| Code | Meaning | Example Value |
|---|---|---|
| SR100 | Product series | Fixed prefix |
| W | Frame inner width (mm) | 500 |
| H | Frame height (mm) | 600 |
| L | Frame length (mm) | 1000 |
| D | Roller diameter (mm) | 50 |
| P | Roller pitch (mm) | 75 |
Standard Order Example:
Requirement: inner width 500 mm, height 600 mm, length 1000 mm, roller diameter 50 mm, pitch 75 mm.
Order No.:SR100-500-600-1000-50-75
Customization Note: If you need stainless steel, rubber‑coated rollers, special colors, or additional accessories (guards, dampers, etc.), simply add "‑CUSTOM" after the order number and specify your requirements. Our engineering team will respond with a confirmed 3D proposal within 2 hours.
To suit diverse operating conditions, we offer a full range of add‑on components:
| Accessory | Function |
|---|---|
| Side guide rails | Prevents loads from drifting or falling off (round steel, aluminum, or nylon wear strip options) |
| End stoppers | Fixed polyurethane bumper / gravity‑actuated flip‑up stop (prevents pallets from rolling off) |
| Speed dampers | Brush‑type damping rollers or eccentric damping wheels – control glide speed on long inclines to avoid rear‑end collisions |
| Workstation positioning stops | Pneumatic or manual stop hooks for precise holding at assembly stations; release when operation is complete |
| ESD grounding chains | Copper chains to dissipate static charge – protects sensitive electronic parts |
| Transition plates | Bridge plates between different equipment to eliminate height gaps and prevent jams |
| Wedge shims | Placed under legs to quickly create a slight slope without modifying the floor |
This conveyor excels in a wide range of scenarios:
Logistics & Warehousing – carton conveying in e‑commerce fulfillment centers, express sorting hubs, and retail distribution centers; pick‑to‑light / pick‑to‑voice order picking lines.
Manufacturing – assembly line workstation linking and in‑place rotation of components (automotive, home appliances, electronics, 3C products).
Loading / unloading docks – placed at truck tailgates with a slight decline, allowing goods to slide in/out, greatly reducing dock worker fatigue.
Accumulation & buffering – temporary storage before packaging, inspection, or palletizing; zero back‑pressure accumulation prevents product damage.
Food & Beverage – conveying on beverage filling lines and food packaging lines.
Pharmaceutical & Medical – cleanroom conveying (all‑aluminum/stainless steel versions comply with GMP standards).
Express sorting – integration with DWS (dimensioning, weighing, scanning) systems as a vibration‑free platform that improves dynamic scale accuracy.
Special environments – ‑25°C cold storage, high‑humidity, or dusty conditions (with appropriate material choices).
We offer comprehensive customization based on your specific needs:
Load dimensions – length, width, height, and weight per unit.
Load bottom condition – flatness, material (solid flat, grid pattern, etc.).
Special environmental factors – humidity, temperature, chemical exposure, etc.
Installation type – floor‑mounted fixed, folding mobile, or overhead suspension.
Aesthetic requirements – frame and roller color (RAL code) and surface finish.
Design Principle: We strictly follow the “at least 3 rollers under the load at all times” rule to ensure stable conveying. The more detailed your requirements, the more precise our solution will be.
Professional manufacturing – years of experience in conveyor design and production; proven reliability under heavy‑duty cycles.
Superior quality – high‑grade welded steel tubes, precision bearings, and reinforced profiles; meticulous workmanship.
Flexible customization – from standard units to fully custom designs – rapid response and no design fees.
Full‑service support – we provide a complete cycle: site survey → solution design → equipment fabrication → installation & commissioning → after‑sales maintenance.
Let us simplify your material handling, and make simplicity even more cost‑effective. For a free CAD layout drawing or a tailored quotation, please contact us today!
