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SELECTION GUIDE

Muir's recommended short-link anchor chain size by boat length and displacement, with the matching Muir windlasses and drum winches and the checks to make before ordering a gypsy.

DocumentMuir Anchor Chain Size Chart
FormatPDF · 2 pages · 0.1 MB
LanguageEnglish
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Chain Size ChartBefore You OrderProducts
Muir Anchor Chain Size Chart

Recommended Short-Link Chain

Boat length Displacement Chain (mm) Chain (inch) Weight (DIN 766) Muir systems
Up to 6 m (up to 20 ft) Under 1,500 kg 6 mm 1/4" 0.8 kg/m DW06 drum winch, Storm VR600
6–10 m (20–33 ft) Under 4,000 kg 8 mm 5/16" 1.4 kg/m DW08, DW10 drum winches, Storm VR/VRC850
10–13 m (33–43 ft) Under 8,000 kg 10 mm 3/8" 2.2 kg/m DW12 drum winch, Storm VR/VRC1250, HR1600 Cougar
13–18 m (43–60 ft) Under 15,000 kg 13 mm 1/2" 3.9 kg/m Storm VR/VRC2500, HR2500 Cheetah, HR3500 Jaguar
18–24 m (60–80 ft) Under 30,000 kg 16 mm 5/8" 5.8 kg/m HR4000 Thor, HR4200 Thor

Size and Standard

  • Size and standard must both match: DIN 766, ISO 4565, US BBB and High Test chain of the same nominal size have different link pitch, and a gypsy is cut for one standard only.
  • Check the stamp on your chain or gypsy, or measure a few links, before you order.
  • Use calibrated chain only: ordinary galvanised chain is not calibrated, so its links will not seat in a gypsy and can jump under load.

Sizing Up and Scope

  • Go up a size for heavy or high-windage boats or a boat at the top of its length band, for charter, commercial or extended offshore use, or if you plan to carry more chain or a heavier anchor later.
  • Scope rule of thumb: at least 5:1 for all-chain rode, about 7:1 for rope and chain (scope = rode let out ÷ depth plus bow-roller height). Allow more in strong wind or poor holding.
  • Guide only: confirm the selection with Muir or a Muir dealer. Weights are for DIN 766 calibrated chain.

This document covers the Muir models named above, as printed in the PDF. The Muir windlasses we stock today are listed below; motor ratings and parts can differ between generations, so check the model plate and ask us before ordering spares.

Need a part that isn't listed? Ask us to source it and quote the part number from the PDF.

Products in this Selection Guide