This is a Stand-Up Swivel Pulley Block (also known as a sailboat plain bearing stand-up block).
Key Features
Stand-Up Spring: The conical metal spring keeps the pulley standing upright. This prevents the block from hitting the boat deck and stops the rope from tangling when there is no tension.
Swivel Head: The top can rotate 360 degrees to align automatically with the load.
Marine-Grade Build: The metal plates and spring are made of 316 stainless steel to prevent rust in salt water, while the black wheel (sheave) is made of UV-resistant nylon or acetal.
Common Uses
Sailing: Used on sailboats for halyards, deck leads, or mainsheet control systems.
Fitness Equipment: Frequently used as a replacement part for Pilates Reformer machines to guide the pulley ropes.
Are you looking to replace this for a sailboat or a Pilates machine? We can help find the exact size or load capacity you need.
Sheave Block Head Pulley Block Swivel Sailboat Pulley.
Haifan Rigging supply a range of blocks and pulleys.They come with a variety of fittings for each end to suit your particular application.
To put in your order, just fill out our short inquiry form here,but please do ask us if you need anything custom-made.
If you wish to ask a question or need further advice, you are welcome to contact us.
We’ll be happy to help.
We are always available for clarification and for order.
