Quick answer: for straight single-lane container conveying, use the 820 straight-running flat-top chain (4,300 N plate load, plate widths 82.6 / 114.3 / 152.4 mm). If the line turns corners, you need the 880 side-flexing chain (4,420 N, same three widths). For harder duty on curves at the full 152.4 mm width there is the 880HD heavy-duty side-flexing chain. All three run on the same 820 drive and idler wheels. Spiral elevators and small-format lines are covered by the spiral chain plate and the 40P/50P/60P miniature plates.
Flat-top chain vs modular belt: which one do you need?
A modular belt is a wide, brick-layed mat you can build to almost any width. A flat-top chain is a single row of hinged plates in fixed standard widths, running in a wear-strip track. Different tools for different lines.
Pick a flat-top chain when:
- You convey containers in a narrow single lane: bottles, cans, jars, packs. One chain per lane in guide rails is simpler and cheaper than a narrow modular belt doing the same job.
- You run a beverage or filling line. PET and glass bottle lines, can lines and packaging conveyors are where flat-top chain grew up. The smooth continuous plate lets containers slide, accumulate against back pressure and single-file into fillers and labelers.
- You need a direct replacement. The 82.6 / 114.3 / 152.4 mm plate widths are industry-standard sizes; worn chain swaps in without touching the conveyor.
Go to a modular belt when the product is wide or unstable, when the width has to be custom, when you want flights or side guards, or when several lanes should share one carrying surface. How to Select the Right Plastic Modular Belt covers that side of the decision.
Straight-running 820 vs side-flexing 880 vs heavy-duty 880HD
| Series | Type | Chain plate load | Plate widths | Material | Best for |
|---|---|---|---|---|---|
| 820 | Straight running | 4,300 N | 82.6 / 114.3 / 152.4 mm | POM / PP | Straight single-lane sections, filler and labeler infeeds, accumulation tables |
| 880 | Side-flexing (radius) | 4,420 N | 82.6 / 114.3 / 152.4 mm | POM / PP | Lines with corners; one chain covers straights and curves with no transfer plates |
| 880HD | Heavy-duty side-flexing | 4,420 N | 152.4 mm | POM / PP | Curves carrying heavier containers and glass at the full plate width |
The test is simple: does the lane ever turn? Never, then the 820 is the economical default. Any corner in the layout means 880, because a straight-running chain will not flex sideways, full stop. Move up to 880HD when the 152.4 mm lane sees heavy or abrasive service, glass containers, long accumulation under back pressure, and chain life on the corners has become the maintenance headache.
Series 820: straight-running flat-top chain
The 820 series is the standard straight-running chain for container and packaging lines: 4,300 N chain plate load, 4.3 mm plate thickness, 13.8 mm overall height, in the three standard plate widths of 82.6, 114.3 and 152.4 mm. Injection and precision molded in POM (natural or brown) or PP (natural). Beverage lines almost always take POM; it slides well and wears slowly under constant container traffic. PP is the pick where chemical exposure rules POM out. The closed plate gives bottles and cans a stable deck for accumulation and high-speed single filing.
Series 880: side-flexing flat-top chain
The 880 series adds side-flex, so the same chain negotiates horizontal curves in the track. Plate load is 4,420 N, widths match the 820 (82.6 / 114.3 / 152.4 mm), materials POM or PP. It takes a container lane around corners on a single drive and deletes the dead plates and transfer points a straight-only chain forces on you. One layout note: the curve itself is formed by the conveyor track, wear strips and guide rails, so include your curve geometry with the inquiry and we will confirm the chain suits it.
Series 880HD: heavy-duty side-flexing chain, 152.4 mm
The 880HD heavy-duty side-flexing chain is the reinforced variant at the full 152.4 mm plate width, rated 4,420 N and molded in POM or PP (natural, brown). It exists for curves under punishment: heavier containers, glass, long accumulation under back pressure, lines where the corners eat standard chain.
Spiral and miniature chain plates
- Spiral chain plate: for spiral and helical conveying, POM or PP. Use it where a container line has to gain or lose elevation in a small footprint, spiral elevators and lowerators on bottle and can lines being the usual case.
- Miniature chain plates 40P / 50P / 60P: small-pitch plates in POM or PP for compact conveyors and small-format product where a full-size 820/880 plate is simply too big.
Drive components: 820 drive and idler wheels
Flat-top chains run on matched wheels, not modular belt sprockets. The 820 chain drive and idler wheels are injection molded POM (acetal) and fit both 820 and 880 series chains: a toothed drive wheel engages the chain hinge at the head shaft and an idler wheel returns it at the tail. Order one drive wheel set per lane plus idlers, and put your shaft size in the inquiry so the bores come matched.
Flat-top chain spec checklist
Everything below fits in one email, and it is all we need to confirm a complete bill of materials:
- Chain type: straight running (820), side-flexing (880) or heavy-duty side-flexing (880HD)
- Plate width: 82.6, 114.3 or 152.4 mm, and number of lanes
- Material: POM (low friction, beverage standard) or PP
- Conveyor length per lane and line speed
- For side-flexing lines: layout sketch with the number of curves and their angles
- Product: container type, material (PET / glass / can), weight, and whether the line accumulates under back pressure
- Head and tail shaft sizes for drive and idler wheel bores
Request a flat-top chain quote. Standard replacement widths come out of stock molds, chain and matched wheels ship together, manufacturing base pricing.
