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SR100
RONWIN
The Straight Modular Gravity Roller Conveyor is a simple and reliable non-powered conveying solution for cartons, totes, pallets, boxes, and other flat-bottom unit loads. Products move along freely rotating rollers either by manual pushing on a horizontal conveyor or by gravity when the conveyor is installed at a suitable incline.
With a modular frame, multiple roller diameters and materials, adjustable support heights, and optional accessories, the conveyor can be configured for warehouses, production lines, packing stations, assembly areas, and distribution centers.
A gravity roller conveyor is a non-powered material handling system that uses freely rotating rollers to move goods along a straight conveying path.
Unlike a powered roller conveyor, it does not require motors, gearboxes, or electrical controls. Products can be manually pushed along a horizontal conveyor or move automatically under gravity when the conveyor is installed at a suitable incline.
The modular structure allows individual conveyor sections to be installed independently or connected to create longer conveying lines. Sections can also be integrated with curved roller conveyors, powered conveyors, workstations, and other material handling equipment.
Because of its simple construction and flexible configuration, a straight gravity roller conveyor is widely used for short-distance transfer, workstation connection, carton handling, temporary accumulation, packing, and warehouse material movement.
The operating principle depends mainly on whether the conveyor is installed horizontally or at an incline.
When installed horizontally, operators manually push cartons, totes, pallets, or other suitable loads along the conveyor.
Free-turning rollers with bearings reduce rolling resistance, allowing goods to move more easily than carrying or sliding them across a fixed surface.
This configuration is suitable for packing stations, assembly workstations, inspection areas, picking lines, and other intermittent material handling applications.
When the conveyor is installed at a suitable slope, gravity moves products from the higher end toward the lower end without a powered drive.
The required slope depends on product weight, bottom condition, roller diameter, roller pitch, bearing resistance, conveyor length, and required conveying speed.
For longer inclined sections, speed-control components or end stops can be added where necessary to help control product movement.
The required conveyor slope depends on product weight, bottom condition, roller resistance, and required conveying speed.
As an initial reference:
Load Type | Suggested Initial Slope |
|---|---|
Light Cartons Below 10 kg | Approx. 2.5°–3.5° |
Medium Loads 10–50 kg | Approx. 1.5°–2.5° |
Heavy Loads Above 50 kg | Approx. 1.0°–1.5° |
Heavier loads generally require a smaller slope because their higher inertia can increase conveying speed and impact at the end of the line.
These values should be used as initial selection references only. The final slope should be confirmed according to product dimensions, bottom surface, roller configuration, conveyor length, and actual operating conditions.
The conveyor operates without a motor or electrical drive system, providing a simple solution for applications where automatic powered conveying is unnecessary.
Individual straight conveyor sections can be used independently or connected to form longer material handling lines.
The modular construction also makes future layout modification or conveyor expansion easier.
Rollers are available in different diameters, materials, and surface configurations according to product weight and operating requirements.
Options include galvanized steel, stainless steel, aluminum alloy, PVC, ABS, and rubber or PU-coated rollers.
Different frame widths are available for cartons, totes, pallets, and other product dimensions.
Adjustable support legs allow the conveyor height to match workstations, packing tables, machines, or adjacent conveyor sections.
The conveyor can be installed horizontally for manual product movement or at a suitable incline for gravity flow.
Straight gravity roller sections can connect with curved gravity conveyors, powered roller conveyors, belt conveyors, packing stations, and other material handling equipment.
A typical straight gravity conveyor consists of rollers, side frames, support legs, cross braces, leveling feet, and optional side guides.
Component | Function | Available Options |
|---|---|---|
Rollers | Support and convey products | Galvanized steel, stainless steel, aluminum, PVC, ABS, rubber/PU-coated |
Side Frames | Hold and align rollers | Carbon steel, aluminum, stainless steel |
Support Legs | Support conveyor structure | Fixed, adjustable, mobile options |
Cross Braces | Improve frame rigidity | Steel or aluminum |
Leveling Feet | Level and stabilize conveyor | Selected according to load |
Side Guides | Help keep products on the conveyor | Steel, aluminum or wear-strip options |
Parameter | Specification |
|---|---|
Model | SR100 |
Conveyor Type | Straight Modular Gravity Roller Conveyor |
Drive Mode | Non-Powered / Gravity / Manual Push |
Roller Diameter | Φ25 / Φ38 / Φ50 / Φ60 / Φ76 / Φ80 / Φ89 mm |
Roller Material | Galvanized Steel / Chrome-Plated Steel / Stainless Steel / Aluminum / PVC / ABS / Rubber or PU-Coated |
Roller Pitch | 60 / 75 / 90 / 100 / 120 / 150 mm |
Frame Material | Carbon Steel / Aluminum / Stainless Steel |
Standard Inner Width | 420 / 500 / 600 / 700 / 800 / 900 / 1000 mm |
Custom Width | Up to approx. 1500 mm |
Standard Length | 600 / 1000 / 2000 / 3000 / 4000 / 5000 mm |
Custom Length | Up to approx. 12000 mm |
Adjustable Height | Approx. 300–1500 mm |
Standard Load Capacity | Approx. 50–100 kg/m |
Heavy-Duty Configuration | Up to approx. 1000 kg/m |
Installation | Horizontal / Inclined |
Recommended Gravity Slope | Approx. 1°–3.5°, depending on load |
Standard Operating Temperature | Approx. -5°C to +40°C |
Roller Mounting | Spring-Loaded / Internal Thread / Tenon / Through-Shaft |
Specifications vary according to roller diameter, roller pitch, conveyor width, frame structure, load distribution, installation method, and operating conditions.
Roller diameter and roller pitch are two important factors when configuring a gravity roller conveyor.
Roller diameter should be selected according to product dimensions, product weight, required conveyor load, and operating conditions.
Smaller roller diameters can be suitable for lightweight cartons and packages, while larger and stronger rollers are commonly selected for heavier totes, pallets, containers, and industrial components.
Roller pitch refers to the center-to-center distance between adjacent rollers.
As a practical design principle:
The product should normally maintain contact with at least three rollers during conveying.
Products with shorter bottoms generally require closer roller spacing, while longer rigid products may use wider spacing.
Correct roller pitch helps improve conveying stability and reduces the risk of products tipping or becoming trapped between rollers.
The best roller material depends on the load, operating environment, and product surface.
Roller Material | Recommended Application |
|---|---|
Galvanized Steel | General warehouse, carton, tote, and industrial material handling |
Stainless Steel | Humid, corrosion-sensitive, or frequently cleaned environments |
Aluminum | Lightweight conveyor configurations |
PVC / ABS | Lightweight cartons and packages |
Rubber / PU-Coated | Applications requiring additional grip or reduced direct metal contact |
For most general warehouse and manufacturing applications, galvanized steel rollers provide a practical balance of durability and cost.
Stainless steel should be considered when corrosion resistance or frequent cleaning is a higher priority.
Rubber or PU-coated rollers can be selected where additional grip or gentler product contact is required.
Gravity roller conveyors work best with products that have a flat, rigid, and sufficiently strong bottom surface.
Cartons
Boxes
Plastic totes
Trays
Metal containers
Pallets
Rigid packaged products
Soft bags
Flexible packages
Products with uneven bottoms
Very small packages
Products with protruding feet
Irregularly shaped loads
A useful selection principle is that the product should normally maintain contact with at least three rollers during conveying.
If the product has an irregular or flexible bottom, provide its dimensions, weight, and bottom structure so the roller diameter and pitch can be evaluated before conveyor selection.
The straight gravity roller conveyor is suitable for a wide range of warehouse, production, packing, and material handling operations.
Move cartons and totes between picking, packing, temporary storage, staging, and dispatch areas.
Install horizontal gravity roller sections between workstations to make manual product transfer easier.
Connect production or assembly workstations and allow components, containers, or finished goods to move between processes.
Inclined gravity sections can be used where suitable to move cartons between different working heights or temporary loading areas.
Gravity roller sections can provide temporary product holding or buffering between production, inspection, packing, and downstream processes.
Heavy-duty configurations with suitable roller diameters, roller pitch, frames, and support spacing can be designed for pallets and heavier industrial unit loads.
Optional components can be added according to the material handling application.
Accessory | Function |
|---|---|
Side Guide Rails | Help keep products within the conveying path |
End Stops | Stop cartons, totes, or pallets at the end of the conveyor |
Speed Dampers | Help control product speed on inclined sections |
Positioning Stops | Hold products at packing, inspection, or assembly stations |
Transition Plates | Bridge gaps between adjacent conveyor equipment |
Mobile Supports | Allow selected conveyor sections to be repositioned |
Leveling Feet | Adjust conveyor height and alignment |
Wedge Shims | Create a slight gravity slope where required |
Before ordering, consider the following factors.
Product Dimensions
Confirm the length, width, and height of the cartons, totes, pallets, or components being conveyed.
Product Weight
Determine the maximum weight per item and expected load per conveyor section.
Product Bottom Condition
Gravity roller conveyors work best with sufficiently flat and rigid-bottom products.
Conveyor Width
Select an effective width that provides sufficient support without making the conveyor unnecessarily wide.
Roller Diameter
Choose the roller size according to product weight, dimensions, and required load capacity.
Roller Pitch
Configure the spacing so that the product is normally supported by at least three rollers.
Conveyor Length and Height
Determine the required transfer distance and working height according to the facility layout.
Horizontal or Inclined Installation
Choose horizontal installation for manual pushing or an appropriate incline when gravity flow is required.
Operating Environment
Select the frame material, roller material, bearings, and surface treatment according to temperature, humidity, cleaning, and corrosion requirements.
The SR100 model code identifies the main conveyor dimensions and roller configuration.
Model Format:
SR100-W-H-L-D-P
Code | Meaning | Example |
|---|---|---|
SR100 | Product Series | SR100 |
W | Frame Inner Width | 500 mm |
H | Frame Height | 600 mm |
L | Frame Length | 1000 mm |
D | Roller Diameter | 50 mm |
P | Roller Pitch | 75 mm |
Required conveyor:
Inner width: 500 mm
Height: 600 mm
Length: 1000 mm
Roller diameter: 50 mm
Roller pitch: 75 mm
Model: SR100-500-600-1000-50-75
Additional roller materials, surface treatments, side guides, stops, mobile supports, and other accessories can be specified separately according to the application.
A gravity roller conveyor is a non-powered conveyor that uses freely rotating rollers to move cartons, totes, pallets, and other suitable unit loads by manual pushing or gravity.
No. The conveyor does not require a motor or electrical drive. Products are moved manually on horizontal sections or by gravity when the conveyor is installed at an appropriate incline.
Gravity roller conveyors are suitable for cartons, boxes, totes, trays, pallets, containers, and other unit loads with sufficiently flat and rigid bottoms.
The required slope depends on product weight, bottom surface, roller resistance, conveyor length, and desired speed. As an initial reference, many gravity applications use slopes of approximately 1°–3.5°, with the final configuration determined through actual product and conveyor conditions.
Roller pitch depends mainly on the length and rigidity of the product bottom. As a general design principle, the product should normally maintain contact with at least three rollers.
Yes. Heavy-duty configurations can be designed for pallets, but roller diameter, roller pitch, frame structure, support spacing, and total load must be selected according to the actual pallet dimensions and weight.
A gravity roller conveyor moves products by manual pushing or gravity and does not require a powered drive. A powered roller conveyor uses motors and drive components to move products automatically at a controlled speed.
Yes. Straight gravity roller sections can be integrated with curved roller conveyors, powered conveyors, and other conveyor equipment to create a complete material handling route.
Yes. Conveyor width, length, height, roller diameter, roller pitch, roller material, frame material, and accessories can be configured according to the application.
To recommend the correct gravity roller conveyor configuration, please provide:
Product dimensions: Length × width × height
Product weight: Maximum weight per unit
Bottom condition: Flat, rigid, grid, uneven, or other structure
Required conveyor size: Width, length, and working height
Installation: Horizontal or gravity incline
Operating environment: Temperature, humidity, cleaning, or corrosion requirements
Special requirements: Roller material, side guides, stops, mobile supports, or other accessories
These details help determine the appropriate roller diameter, roller pitch, conveyor width, frame structure, and load capacity.
