Name: SB low turret with double cleat
Brand: RONSTAN
SKU: 65512007
Price: 149.00 EUR
Availability: InStock

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SB low turret with double cleat

More details

This swivel base is equipped with two rows of Delrin® ball bearings, ensuring smooth rotation under heavy loads, even during the most demanding sailing conditions.

Weight: 362 g
Maximum rope diameter: 10 mm
Overall height: 111 mm
Mounting hole spacing: 19 mm
Usable with: 57 mm/2.25" double ratchets

Models 402 and 403 incorporate a double cleat perfectly suited for 2-speed purchase systems, offering precision and smooth adjustment. Its integrated retaining spring, combined with the U-adapter, allows for the use of several types of blocks.

Delrin® technology ensures exceptional wear resistance and extends product life.
Compatible with ropes from 8 to 10 mm, it meets the needs of most modern sailboat systems.
The ultra-compact design (111 mm height) maximizes onboard space optimization without compromising strength.
The reduced mounting hole spacing (19 mm) facilitates precise installations even on the tightest decks.

SKU: 65512007 | Barcode: 9316800145836

€149⁰⁰ EUR €161⁰⁰

Weight (g) 362 g
Weight (oz) 12.75 oz
Max rope Ø (mm) 10 mm
Max rope Ø (in) 3/8 in
Screws (mm) 5 FH mm
Screws (in) #10 FH in
Min rope Ø (mm) 8 mm
Min rope Ø (in) 5/16 in
Height (mm) 111 mm
Height (in) 4 3/8 in
Fastener spacing (mm) 19 mm
Fastener spacing (in) 3/4 in
Use with 57 mm/2.25" double ratchet

Our tips for choosing

Workload and breaking load

Choose your pulley based on the workload it will have to handle and the desired gear ratio. The orders of magnitude vary depending on the support: 400 to 500kg for the mainsheet or cunningham of an 18-foot catamaran, 100 to 200kg for the mainsheet or downhaul of a 420 dinghy for example.

Coefficient of friction

Modern ball bearing pulleys offer a much lower coefficient of friction than those without balls and are recommended for maneuvers that require constant adjustment (mainsail sheet, downhaul, cunningham, spinnaker essentially).

Restraining force

For the mainsheet which is not always fully tightened, or even never on some boats which require constant adjustment (29er, 49er, Class A,...) as for the spinnaker sheet, favor automatic or non-automatic winch pulleys, which considerably save muscles and gloves thanks to a retention that can go up to 70% of the workload.

Sheave diameter

Choose the diameter of the pulley according to the diameter of the rope it will guide. For example, depending on the support and workload, a 40 or 57 sheave is very suitable for a 6 to 10mm mainsail sheet. For Cunningham or downhaul type maneuvers, 16 or 22 sheaves are suitable.

Material

Stainless steel, carbon, composite, it's essentially a matter of weight, with an impact on the price: it all depends on the importance you attach to it. If the pulley is to guide a cable, use aluminum sheaves which will be much more resistant than composite materials.