Description
Product Overview
The LF820 mini flat top chain is the precision solution for conveying small, lightweight, or dimensionally unstable products that cannot be reliably transported on standard 25.4 mm pitch flat top chains. Mini flat top chains use a reduced link pitch — approximately 15–16 mm effective pitch — increasing the number of link support points per metre from 39 (standard 820) to approximately 65. This denser support grid substantially reduces the polygon effect instability that causes small products to rock, pitch, and tip on standard pitch chains at production line speeds. EverPower plastic chain Australia supplies the LF820 mini flat top series across widths from K118 to K450 as direct replacements for System Plast 820 mini equivalents.
Standard packing for the LF820 mini is 10 ft (3.048 m) per box, maintaining compatibility with the standard LF820 packaging and ordering system. Maximum conveyor length is limited to approximately 12 m for mini flat top chains — shorter than standard LF820 — because the increased number of links per metre results in a proportionally higher total chain weight and chain-to-rail friction per unit of conveyor length. The maximum tensile strength is approximately 1,230 N, which is the primary load constraint on mini flat top applications and limits the product weight that can be accumulated without exceeding chain tension rating.
Technical Parameters
| Parameter | LF820 Mini (Standard) | LF820 (Reference — Standard Pitch) |
|---|---|---|
| Effective link pitch | ~15–16 mm | 25.4 mm (1 inch) |
| Links per metre | ~65 | ~39 |
| Max. conveyor length | ≤12 m | ≤24 m |
| Max. tensile strength | ≤1,230 N | ≤3,500 N (width-dependent) |
| Max. speed (dry) | 60 m/min | 60 m/min |
| Operating temperature | −40 °C to +90 °C | −40 °C to +90 °C |
| Width range | K118 to K450 | K118 to K1200 |
| Packing | 10 ft / box (26 pcs/m equiv.) | 10 ft / box (26 links/m) |
Applications: Where Mini Flat Top is the Correct Specification
Pharmaceutical vial and ampoule conveying is the primary application driver for the LF820 mini flat top in the Australian market. Vials of 2–30 ml capacity typically have base diameters of 16–30 mm — at the lower end of this range, on a standard 25.4 mm pitch chain, the vial base spans fewer than two link widths. Each time the chain advances one link pitch at the drive sprocket, the vial experiences a small angular perturbation as the chain link engagement geometry changes beneath it. At 40 m/min, these perturbations occur at a frequency of approximately 42 Hz — a frequency range where PET and glass container resonance modes can be excited, amplifying the angular displacement and causing tip events.
Mini flat top chain, at approximately 65 links per metre, reduces the perturbation frequency for the same container to approximately 70 Hz — above the resonance range for most container geometries — and reduces the angular amplitude of each perturbation by approximately 40%. The practical result is that vial lines running on mini flat top chains achieve full rated speed without the tip events that would require 20–30% speed reduction on standard pitch chains.
Other Applications Suited to Mini Flat Top
Beyond pharmaceutical, the LF820 mini finds application in cosmetic tube conveying (round or oval bases 15–25 mm across), miniature aerosol cans (base diameter 25–35 mm), small confectionery items (individual wrapped chocolates, small candy bags), electronic component handling on assembly line conveyors, laboratory sample tube racks, and miniature glass bottles in spirits and premium beverage packaging. In each case the common factor is a product base dimension that, on a standard pitch chain, produces visible product instability at the target line speed.
A secondary application is as a transfer chain on chain-dead-plate-chain systems — where a mini flat top chain with a fingered leading edge is used specifically for the transfer zone, reducing the gap exposure time at the plate-to-chain transition and the resulting product tip probability. The mini pitch chain’s shorter link length means the chain leading edge advances in smaller increments, maintaining support under a small-base product for a greater proportion of the chain revolution.
Maximum Run Length Constraint: Planning for 12 m
The 12-metre maximum run length is the most important design constraint to communicate to conveyor designers specifying the mini flat top. At 65 links per metre and chain weight approximately 1.4–2.5 kg/m depending on width, a 12-metre mini flat top chain run has a total chain weight of 17–30 kg. The chain tension at the tail of a 12-metre run at rated load already approaches the maximum tensile strength of 1,230 N. Beyond 12 metres, the catenary chain tension exceeds the chain rating before the maximum product load is applied.
For conveyor systems requiring more than 12 metres of small-product transport, the solution is a series of mini flat top conveyors in tandem, each with its own drive and tail sprocket, separated by short dead-plate transfers. The mini flat top chain is terminated at 10–11 metres (leaving a safety margin below the 12 m limit), and the next conveyor section begins with a fresh chain loop. This tandem layout is common in pharmaceutical vial inspection lines where the vial path is 20–30 metres total and 3–4 separate mini flat top conveyor sections are used in series.
Matched Components EverPower Also Supplies
| Component | Description | Availability |
|---|---|---|
| LF820 Mini Sprockets | Matched to mini pitch tooth profile, all K-widths | ✓ On request |
| Mini Connecting Pins (SUS304) | For all LF820 mini widths | ✓ In stock |
| LF820 Standard Flat Top | For longer runs or heavier loads on the same line | ✓ In stock |
| Wear Strips — UHMWPE (mini) | Cut to width for mini flat top conveyor frames | ✓ On request |
What Our Customers Say
“We installed LF820 mini flat top K252 on our 20 ml vial inspection line at 45 m/min. Standard chain at this speed had a tip rate of approximately 15 per shift. Mini flat top: zero tips in the first three weeks and sustained zero thereafter. The chain paid for itself in one week of reduced reject handling.”
— Process Engineer, Pharmaceutical Sterile Manufacturing, Sydney NSW
“LF820 mini K190 on our cosmetic tube line — oval tubes, 18 × 28 mm base. The oval base was causing consistent rotation on standard chain as the tube crossed the inter-link gap. Mini flat top eliminated the rotation. Label orientation at the downstream scanner improved from 87% to 99.6% first-pass correct.”
— Automation Engineer, Cosmetics Manufacturing, Melbourne VIC
“We needed a tandem layout — three 11-metre mini flat top sections in series for a 30-metre vial inspection path. EverPower supplied all three lengths from the same batch, same width, same sprocket configuration. Chain-to-chain hand-off at the dead plates is seamless. Professional supply and technical support throughout the project.”
— Conveyor Project Manager, Pharmaceutical Facility Build, Brisbane QLD
