Ronstan Soft Attachment Snatch Block, 42mm
Shipping and Delivery
Enjoy free shipping on qualifying orders of $145 or more delivered within the 48 contiguous United States. Alaska, Hawaii, Puerto Rico, and other U.S. territories are excluded.
Delivery for qualifying free-shipping orders takes 8 to 10 business days.
Free shipping does not apply to:
- Orders containing only clearance items
- Customized special orders made to your detailed requirements
- Sails and boats
- Long tracks, spinnaker poles, whisker poles, and large tubes
- Oversized or heavy items, including items that require less-than-truckload (LTL) freight shipping
Standard Shipping
- UPS and FedEx Ground: Delivery usually takes 2 to 5 business days for in-stock orders.
- USPS: Allow an additional 3 business days beyond the standard shipping time.
- Saturday delivery: UPS and FedEx deliver on Saturdays only for overnight shipments sent on Friday. Additional charges may apply.
Oversized Items and Freight Shipping
Oversized items, such as whisker poles, spinnaker poles, and tracks longer than 8 feet, require freight shipping. The estimated shipping cost is $500, depending on the destination.
For freight deliveries, provide a commercial address, such as the marina, yacht club, or boatyard where your sailboat is located. The recipient must sign for the shipment upon delivery.
International Orders
International customers are responsible for all applicable import duties, fees, and taxes.
Ronstan Soft Attachment Snatch Block, 42mm
Ronstan Soft Attachment Snatch Block, 42mm
Designed from the outset to deliver outstanding performance, these blocks achieve the highest ratings for dynamic load vs sheave diameter in our keelboat block range. They are built to perform and built to last. Every SA Block features fully machined, anodised aluminium cheek plates. Sheaves run on duplex stainless steel hubs and incorporate precision composite journal bearings and thrust washers. The soft attachment is a purpose designed Dyneema SK99 cord shackle with aluminium dog bone.
Ultimate dynamic and static load performance
SA Snatch Blocks incorporate a full contact, selflubricating composite journal bearing running on a polished duplex stainless steel hub, to maintain low friction performance under heavy dynamic and static loads. Thrust washers in the same composite material are positioned between the sheave and the cheek plates to handle the high side loads that can be generated when line entry and exit alignment is not ideal. Testing has shown reduced friction and greater durability than ball bearings in this application.
Attach, detach and open
The soft shackle provides a simple means of attachment, secured with the aluminium dog bone but easily opened when necessary to detach the block. With the shackle open a gentle rotation of the cheek plates opens the head of the block so it can be fitted to a standing line. To close the block, rotate the cheeks back to the closed position until the spring loaded ball lock secures them in place. No additional external straps or bands required.
Soft shackle with aluminium dog bone
Drawing on the expertise of Nodus Factory, many design iterations were tested before finalising specifications of the Dyneema SK99 cord shackle and aluminium dog bone. Proprietary Nodus Factory splicing techniques and fibre surface coating ensure secure load transfer from the block and maximum durability.
Aluminium alloy cheek plates & sheaves
Block cheeks and sheaves are precision machined from high strength aluminium alloy, then anodised for durability and corrosion resistance. The soft attachment through the hub provides a protective buffer between the block and boat surfaces. Retaining guides in soft elastomer ensure that the block remains aligned within the soft shackle.
A multitude of applications
Suited to temporary or permanent line deflection, load carrying and snatch block applications including:
2:1 Main halyards. • Headsail and spinnaker sheets. • Mast base halyard deflection. • Running backstays
Features:
- Soft shackle retained by elastomer guides.
- Aluminium dog bone allows for easy attachment and removal of the block.
- Cheek plates twist to open the block and close with spring loaded ball lock securing in place.
- Primary bearing and thrust washers for optimum dynamic and static performance
Specifications:
- Max. Rope diameter (in): 1/2
- Sheave diameter (in): 1 5/8
Materials:
- Cheek plates and sheaves: Aluminium alloy, anodised.
- Bearings and thrust washers: Proprietary self-lubricating composite.
- Hubs: Grade 2205 stainless steel.
- Soft shackle: Dyneema SK99 cord with proprietary coating, aluminium dog bone, TPV collar.
Ronstan Soft Attachment Snatch Block, 42mm
Designed from the outset to deliver outstanding performance, these blocks achieve the highest ratings for dynamic load vs sheave diameter in our keelboat block range. They are built to perform and built to last. Every SA Block features fully machined, anodised aluminium cheek plates. Sheaves run on duplex stainless steel hubs and incorporate precision composite journal bearings and thrust washers. The soft attachment is a purpose designed Dyneema SK99 cord shackle with aluminium dog bone.
Ultimate dynamic and static load performance
SA Snatch Blocks incorporate a full contact, selflubricating composite journal bearing running on a polished duplex stainless steel hub, to maintain low friction performance under heavy dynamic and static loads. Thrust washers in the same composite material are positioned between the sheave and the cheek plates to handle the high side loads that can be generated when line entry and exit alignment is not ideal. Testing has shown reduced friction and greater durability than ball bearings in this application.
Attach, detach and open
The soft shackle provides a simple means of attachment, secured with the aluminium dog bone but easily opened when necessary to detach the block. With the shackle open a gentle rotation of the cheek plates opens the head of the block so it can be fitted to a standing line. To close the block, rotate the cheeks back to the closed position until the spring loaded ball lock secures them in place. No additional external straps or bands required.
Soft shackle with aluminium dog bone
Drawing on the expertise of Nodus Factory, many design iterations were tested before finalising specifications of the Dyneema SK99 cord shackle and aluminium dog bone. Proprietary Nodus Factory splicing techniques and fibre surface coating ensure secure load transfer from the block and maximum durability.
Aluminium alloy cheek plates & sheaves
Block cheeks and sheaves are precision machined from high strength aluminium alloy, then anodised for durability and corrosion resistance. The soft attachment through the hub provides a protective buffer between the block and boat surfaces. Retaining guides in soft elastomer ensure that the block remains aligned within the soft shackle.
A multitude of applications
Suited to temporary or permanent line deflection, load carrying and snatch block applications including:
2:1 Main halyards. • Headsail and spinnaker sheets. • Mast base halyard deflection. • Running backstays
Features:
- Soft shackle retained by elastomer guides.
- Aluminium dog bone allows for easy attachment and removal of the block.
- Cheek plates twist to open the block and close with spring loaded ball lock securing in place.
- Primary bearing and thrust washers for optimum dynamic and static performance
Specifications:
- Max. Rope diameter (in): 1/2
- Sheave diameter (in): 1 5/8
Materials:
- Cheek plates and sheaves: Aluminium alloy, anodised.
- Bearings and thrust washers: Proprietary self-lubricating composite.
- Hubs: Grade 2205 stainless steel.
- Soft shackle: Dyneema SK99 cord with proprietary coating, aluminium dog bone, TPV collar.
