Keelboat Parts

40mm ball bearing block from Ronstan in triple block with swivel head configuration. This 40mm range features sheaves running on Acetal bearings that provide high performance & low friction. The 2-stage ball bearing system provides consistent...

Ronstan ball bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball...

Ronstan ball bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball...

The Ronstan 20 mm Utility Block range featues stainless steel cheeks and Acetal sheaves for a long service life with virtually no maintenance. This ferrule top version features a narrow attachement point for small spaces. Hollow rivets in the block heads...

The Ronstan T-Cleat medium cam cleat is the product of intensive development efforts, producing a range of cleats that provide unbeatable holding power, yet are designed for easy cleating and releasing of control lines in every application and load...

The Ronstan 30mm Orbit block is small and compact. Used on high performance boats, these blocks are used by the best and perform for the best. Made from advanced fiber and polymer technology, these blocks are ten times stronger than steel, yet more...

Ronstan's ball bearing blocks were conceived and engineered for the demands of competitive sailing in all types of boats and have rapidly become the international choice for high performance hardware. Highly efficient, low friction bearing systems for...

40mm ball bearing block from Ronstan in single block with loop top configuration. This 40mm range features sheaves running on Acetal bearings that provide high performance & low friction. The 2-stage ball bearing system provides consistent...

40mm ball bearing block from Ronstan in single block with becket configuration. This 40mm range features sheaves running on Acetal bearings that provide high performance & low friction. The 2-stage ball bearing system provides consistent performance...

40mm ball bearing block from Ronstan in single stand up block configuration with a small stainless base and spring. This 40mm range features sheaves running on Acetal bearings that provide high performance & low friction. The 2-stage ball bearing...

40mm single block from the Ronstan All Purpose (AP) blocks range, a great all around solution for a variety of rigging applications. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads...

40mm single block with becket from the Ronstan All Purpose (AP) blocks range, a great all around solution for a variety of rigging applications. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with...

Now you can enjoy the flexibility of setting up your rig exactly as you want. Ronstan is the only company that offers a 40 mm ratchet block with both auto and manual engagement models. This manual version allows the ratchet mechanism to be switched on or...

Perfect for spinnaker sheet turning blocks. This Ronstan block is free wheeling at low wind velocity. As the wind velocity increases the pressure on the sheave automatically engages the ratchet. The sheet rope is never trapped in the sheave and can slide...

The Frederiksen ratchet block is legendary. It is light and very strong for optimal performance. The ratchet has a small distance between each click to enhance control of sheets. This is the ideal Laser mainsheet block. From Ronstan: The patented...

Ronstan All purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life,...