Allen Brothers 40mm Dynamic Quadruple Block
Pickup available at 1830 East Interstate 30
Usually ready in 24 hours
Shipping and Delivery
Free shipping for orders of $98 or more (US Continental)
- Free shipping for orders of $750 or more (International)
- Add 3 business days to the standard shipping time for USPS deliveries.
- UPS and FedEx Ground usually take 2 to 5 business days for in-stock orders.
- UPS and FedEx deliver on Saturdays only for Friday overnight shipments, which may incur an extra
charge. - Orders that apply for free shipping will be delivered between 8 and 10 business days.
- International customers will be responsible for any applicable import duties,fees, or taxes.
- Oversized items like whisker poles, spinnaker poles, and tracks over 7 feet require freight shipping, with an estimated cost of $500 depending on the destination.These orders must be delivered to a
commercial address, such as a marina, yacht club, or boatyard where your sailboat is located.
A recipient must be present to sign for the delivery upon arrival,For more info, Click Here.
Allen Brothers 40mm Dynamic Quadruple Block
Allen Brothers 40mm Dynamic Quadruple Block
40mm Quad Dynamic Swivel Block
The 40mm Quad Dynamic Swivel Block is a high-performance, four-sheave pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for high-purchase control systems.
Ideal for applications requiring significant mechanical advantage, such as vangs, backstays, mainsheets, and other high-load control systems.
Features:
- Quad-sheave design for high-purchase systems and maximum mechanical advantage
- Manufactured from durable, lightweight glass-loaded nylon
- Ideal for mainsheet, vang, backstay, and keelboat control line applications
- Patented Dynamic Bearing System with twin rows of stainless-steel ball bearings running on a stainless-steel rail
- Caged ball bearings for reduced friction and enhanced rolling performance
- Superior load-carrying capability and long service life
- 360° Swivel Head fitted with a 5mm shackle for flexible attachment and optimal load alignment
- Swivel Lock System allows the shackle to be locked in 90° orientations when required
- Swivel lock can be removed easily by undoing the shackle and removing it from the swivel pin
- Designed for smooth, reliable performance in demanding marine environments
- Ideal for high-load purchase systems requiring efficient line handling and compact rigging solutions
Technical Description
| Accessories | Swivel |
| Bearing Type | Dynamic |
| Configuration | Quad |
| Length | 95.05 mm |
| Height | 82 mm |
| Width | 80 mm |
| Maximum Line Diameter | 10 mm |
| Breaking Load | 1400 kg |
| Maximum Working Load | 750 kg |
| Sheave Material | Acetal |
| Sheave Diameter | 40 mm |
| Weight | 213 g |
Allen Brothers 40mm Dynamic Quadruple Block
40mm Quad Dynamic Swivel Block
The 40mm Quad Dynamic Swivel Block is a high-performance, four-sheave pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for high-purchase control systems.
Ideal for applications requiring significant mechanical advantage, such as vangs, backstays, mainsheets, and other high-load control systems.
Features:
- Quad-sheave design for high-purchase systems and maximum mechanical advantage
- Manufactured from durable, lightweight glass-loaded nylon
- Ideal for mainsheet, vang, backstay, and keelboat control line applications
- Patented Dynamic Bearing System with twin rows of stainless-steel ball bearings running on a stainless-steel rail
- Caged ball bearings for reduced friction and enhanced rolling performance
- Superior load-carrying capability and long service life
- 360° Swivel Head fitted with a 5mm shackle for flexible attachment and optimal load alignment
- Swivel Lock System allows the shackle to be locked in 90° orientations when required
- Swivel lock can be removed easily by undoing the shackle and removing it from the swivel pin
- Designed for smooth, reliable performance in demanding marine environments
- Ideal for high-load purchase systems requiring efficient line handling and compact rigging solutions
Technical Description
| Accessories | Swivel |
| Bearing Type | Dynamic |
| Configuration | Quad |
| Length | 95.05 mm |
| Height | 82 mm |
| Width | 80 mm |
| Maximum Line Diameter | 10 mm |
| Breaking Load | 1400 kg |
| Maximum Working Load | 750 kg |
| Sheave Material | Acetal |
| Sheave Diameter | 40 mm |
| Weight | 213 g |
