Harken 40 mm Zircon Single Block
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.
Harken 40 mm Zircon Single Block
Harken 40 mm Zircon Single Block
Zircon blocks help trimmers match sail shapes to new conditions immediately. At the core of the Zircon performance are industrial ceramic ball bearings mounted inside caged races. The cages keep these bearings separated so they dont bunch, touch, and stop each other. The result is the most efficient small boat block Harken has ever made. Zircon blocks are available in 40- and 57-mm sheaves in single and double blocks, with or without beckets.
Technical Description
| Sheave (mm) | 40 mm |
| Sheave (in) | 1 9/16 in |
| Length (mm) | 60 mm |
| Length (in) | 2 3/8 in |
| Weight (g) | 22.9 g |
| Weight (oz) | 0.81 oz |
| Maximum line (mm) | 8 mm |
| Maximum line (in) | 5/16 in |
| Maximum working load (kg) | 115 kg |
| Maximum working load (lb) | 250 lb |
| Breaking load (kg) | 340 kg |
| Breaking load (lb) | 750 lb |
Harken 40 mm Zircon Single Block
Zircon blocks help trimmers match sail shapes to new conditions immediately. At the core of the Zircon performance are industrial ceramic ball bearings mounted inside caged races. The cages keep these bearings separated so they dont bunch, touch, and stop each other. The result is the most efficient small boat block Harken has ever made. Zircon blocks are available in 40- and 57-mm sheaves in single and double blocks, with or without beckets.
Technical Description
| Sheave (mm) | 40 mm |
| Sheave (in) | 1 9/16 in |
| Length (mm) | 60 mm |
| Length (in) | 2 3/8 in |
| Weight (g) | 22.9 g |
| Weight (oz) | 0.81 oz |
| Maximum line (mm) | 8 mm |
| Maximum line (in) | 5/16 in |
| Maximum working load (kg) | 115 kg |
| Maximum working load (lb) | 250 lb |
| Breaking load (kg) | 340 kg |
| Breaking load (lb) | 750 lb |
