PRIVACY & LIMITATIONS

Sprocket parameters stay local. No machine is connected.

Pitch, tooth counts, center distance, speed, and candidate count are used only for chain-drive geometry in the current browser. ChainSpan connects to no motor, drive, tensioner, sensor, CAD, inventory, or purchasing system and sends no motion commands.

Two-sprocket geometry, not drive-selection approval

The tool searches even link counts with an approximate open two-sprocket roller-chain relation and estimates center distance, wrap, engaged teeth, mean speed, and driver polygonal ripple. It does not verify chain series, power, torque, starting shock, fatigue, lubrication, temperature, corrosion, alignment, tension, sag, wear, shafts, bearings, keys, guarding, or regulations, and does not cover idlers, multi-strand chains, or complex paths.

Candidate tables are not purchase specifications

CSV and reports contain only inputs and geometric candidates; optional checkpoints stay in the current browser. Production design must use current chain and sprocket manufacturer power/service-factor tables, verify adjustment travel, lubrication, and guarding, and be installed and inspected under lockout/tagout by qualified people.

Advertising and local preferences

This page uses Google AdSense Auto Ads. Google may use cookies or similar technologies under its policies. .miluland.com domain cookies sync language, theme, high contrast, a six-item recent-tools list, and up to 16 favorite tool IDs across MiluLand sites. These values never contain inputs, files, or results; the current site also keeps a local compatibility copy.

Local report studio

The report studio reads only the workbench’s currently visible result summary for local preview, Markdown copy, JSON download, printing, and a SHA-256 fingerprint. It never reads input controls or original files and is not persisted unless you choose to download it.

Optional local checkpoints

Only when you explicitly choose Save does the tool write the visible result summary, time, and optional short label to this site’s browser storage, up to five entries. Imported files and input-control contents are never stored; you can export, restore same-tool checkpoints, or clear them at any time. Imports are limited to 128KB and validate the tool, timestamp, summary, and label of up to 80 characters.