Pulley and Rigging Brands and Sizes Stocked at Barton Marine NZ

Barton Marine NZ lists two main pulley brands — Harken and Ronstan — organised by sheave diameter, plus its own Barton track systems, mast attachments, shackles and rope accessories. If you are choosing a block, the site's category structure lets you filter by size first (from 15 mm up to 75 mm and beyond), then by brand and bearing type. The catalogue does not publish load ratings or line-size ranges in the excerpt available, so confirm those against the manufacturer's spec sheet before ordering.

Harken pulley ranges by size

The Harken menu is split into numbered families, which generally map to sheave diameter:

• 16 mm Ball Bearing
• 29 mm Carbo
• 40 mm Carbo
• 60 mm Element

These cover small control-line blocks up to larger sheets. The "Carbo" and "Element" names indicate different construction families rather than sizes, so two blocks in the same millimetre band can differ in weight and bearing type.

Ronstan pulley ranges by size

Ronstan is listed with a wider spread of diameters and two bearing styles:

There is also a separate Industrial Pulley Blocks category and a Shackles category for general hardware.

Track systems and mast attachments

Under track systems the site lists:

• 19 mm C Track
• 25 mm T Track
• 32 mm T Track
• 19 mm I Beam Track
• 32 mm I Beam Track
• 14 mm Ball Bearing track
• 19 mm Ball Bearing track

Mast attachments are grouped separately: carabiners, exit blocks, mast rigging attachments, rigging stays, shackles, sheaves and wind indicators. This is the section to check when replacing a halyard exit block or a mast-base fitting rather than a deck block.

Shackles, rope and rigging accessories

The rope and accessories category includes Spectra, racing braid, Dyneema, bungy, splicing fids and webbing. Shackles sit under both mast attachments and general hardware, so search by type (bow, D, captive pin) rather than assuming a single listing.

Matching block size to line and load

The site's size-first navigation is useful, but size alone does not determine the right block. Use this sequence:

1. Measure your line diameter. A block's sheave groove must accept the rope without binding; too small a sheave increases friction and rope wear.
2. Estimate the working load on that line, including shock loads from gusts or winching, then compare with the block's safe working load — not its breaking load.
3. Choose bearing type by use. Ball bearing blocks suit applications where the line runs frequently under load (sheets, halyards); plain or all-purpose blocks suit static or lightly adjusted lines.
4. Check the attachment point. Shackle or lashing width, pin diameter and shackle orientation must match the deck eye, padeye or track car.
5. Confirm the track profile if the block mounts on a car — a 25 mm T Track car will not fit 32 mm T Track.

For example, if you are replacing a mainsheet block on a trailer yacht with 10 mm line, you would start in the 40–60 mm band, compare Harken 40 mm Carbo against Ronstan 40 mm Orbit, and then verify safe working load and shackle size against the manufacturer's data before adding to cart.

Practical notes before ordering

• The site identifies itself as 100% Kiwi family owned and runs a "Spring Specials" section, but no prices or stock levels appear in the catalogue text — check each product page for availability.
• Shipping and returns terms are covered on a dedicated page; read it before ordering bulky items such as track lengths.
• Categories overlap (shackles appear in more than one menu), so if a search returns nothing, try the alternate section.