OPF 50 – Rope Dock

OPF 50 Block – Double Swivel

Andrew — Thu, 18 Sep 2025 09:54:28 +0000

The Antal OPF 50 mm Double Swivel Block (Model 00504) is designed for demanding sail-handling applications where strength, smooth operation, and easy handling are essential. It features two 50 mm composite fibre sheaves running on a stainless-steel hub within a one-piece hard black anodised aluminium frame. With composite bearings and Delrin side-ball bearings, this block offers ultra-low friction and high load capacity without needing lubrication.

At the top, a high-resistance stainless steel HR swivel head shackle enables three locking positions—swivel, longitudinal, and transversal—offering maximal alignment and flexibility. The resilient frame eliminates standard assembly pins and screws, making the block extremely lightweight (184 g) yet capable of handling a substantial 600 kg Safe Working Load. It’s an ideal choice for racers and cruisers who demand performance and durability in harsh marine environments.

Specifications
Sheave Diameter: 50 mm × 2
Line Size (Max): 10 mm
Safe Working Load (SWL): 600 kg (1763 lb) :contentReference[oaicite:1]{index=1}
Weight: 184 g (6.49 oz) :contentReference[oaicite:2]{index=2}
Frame Material: Hard black anodised aluminium, Teflon-coated, one-piece
Sheave Material: Composite fibre resin on stainless hub with Delrin side bearings :contentReference[oaicite:3]{index=3}
Swivel Head: HR stainless steel block shackle with 3-position locking :contentReference[oaicite:4]{index=4}
Part Number: 00504 / ANT00504

The Antal OPF 50 mm Double Swivel Block is an essential piece of deck and halyard hardware for sailors who demand high strength, low friction, and intelligent alignment in a compact, minimal-maintenance package.

OPF 50 Block – Single Web w/Becket

Andrew — Thu, 18 Sep 2025 09:53:43 +0000

The Antal OPF 50 mm Single Web Block with Becket (Model 00510) is crafted for sailors seeking maximum efficiency and versatility in rigging systems. Featuring a 50 mm composite fibre sheave running on a stainless steel hub with Delrin bearings, this block delivers exceptionally low friction and fluid rope movement without the need for lubrication. Its CNC-machined, hard black anodised, Teflon-coated aluminium frame provides exceptional strength and corrosion resistance in a sleek one-piece design.

Designed with no assembly pins or screws, the OPF 50 Web with Becket maintains a compact, lightweight profile and robust integrity under load. The added becket allows for easy attachment of a secondary control line, while the webbing bail accommodates soft rigging loops or Dyneema webbing. Weighing just 110 g, it supports a Safe Working Load (SWL) of 500 kg, making it an excellent choice for demanding racing and cruising applications where performance and reliability are essential.

Specifications
Sheave Diameter: 50 mm
Line Size (Max): 10 mm
Safe Working Load (SWL): 500 kg
Weight: 110 g
Frame Material: Hard black anodised & Teflon‑coated aluminium
Sheave Material: Composite fibre resin on stainless hub with Delrin bearings
Bail Type: Webbing
Becket: Yes
Part Number: 00510 / ANT00510

The Antal OPF 50 mm Single Web Block with Becket is a top-tier lightweight, low-maintenance deck hardware solution, offering high performance, versatility, and strength for modern sailing setups.

OPF 50 Block – Swivel w/ Becket

Andrew — Thu, 18 Sep 2025 09:53:19 +0000

The Antal OPF 50 mm Swivel Block with Becket (Model 00502) is engineered for high-performance sail handling where flexibility, alignment, and low friction are essential. It features a 50 mm composite fibre sheave running on a stainless-steel hub assisted by Delrin bearings, delivering ultra-smooth rope movement and minimal drag without the need for lubrication. The one-piece CNC-machined aluminium frame is hard black anodised and Teflon-coated, offering exceptional strength, corrosion resistance, and sleek styling.

At its top, a heavy-duty HR stainless steel swivel shackle provides triple locking positions—swivel, longitudinal, and transverse—ensuring optimal alignment under varying load directions. The integrated becket adds versatility, allowing attachment of a secondary control line for enhanced rigging options. With no assembly pins or screws, the block remains compact and lightweight, weighing only 104 g, yet supports a Safe Working Load (SWL) of 600 kg. It’s a premium choice for both racing and cruising sailors who demand reliable, low-maintenance deck hardware with superior performance.

Specifications
Sheave Diameter: 50 mm
Line Size (Max): 10 mm
Safe Working Load (SWL): 600 kg
Weight: 104 g
Frame Material: Hard black anodised & Teflon-coated aluminium
Sheave Material: Composite fibre resin on stainless hub with Delrin bearings
Swivel Shackle: HR stainless steel, triple locking positions
Becket: Yes
Part Number: 00502 / ANT00502

The Antal OPF 50 mm Swivel Block with Becket is a top-tier deck hardware solution combining flexibility, precision alignment, low friction, and robust toughness in a sleek, maintenance-free package—perfect for serious sailors.

OPF 50 Mast Base Block

Andrew — Thu, 18 Sep 2025 09:53:19 +0000

The Antal OPF 50 mm Mast Base Block (Model 00516) is engineered for high-performance sail handling where compactness, durability, and low friction are essential. It features a 50 mm composite fibre sheave running on a stainless-steel hub assisted by Delrin bearings, delivering ultra-smooth rope movement and minimal drag without the need for lubrication. The one-piece CNC-machined aluminium frame is hard black anodised and Teflon-coated, offering exceptional strength, corrosion resistance, and sleek styling.

Designed specifically for vertical mast mounting, the block includes integrated feet with M6 threaded holes to ensure secure and reliable attachment at the mast base. With no assembly pins or screws, the block remains compact and lightweight, weighing only 65 g, yet supports a Safe Working Load (SWL) of 600 kg. It’s an ideal choice for sailors demanding reliable, low-maintenance deck hardware with superior performance in a streamlined package.

Specifications
Sheave Diameter: 50 mm
Line Size (Max): 10 mm
Safe Working Load (SWL): 600 kg
Weight: 65 g
Frame Material: Hard black anodised & Teflon-coated aluminium
Sheave Material: Composite fibre resin on stainless hub with Delrin bearings
Mounting: Integrated feet with M6 threaded holes
Part Number: 00516 / ANT00516

The Antal OPF 50 mm Mast Base Block is a top-tier deck hardware solution combining low friction, strength, and ease of installation in a sleek, maintenance-free package—perfect for serious sailors.

OPF 50 Block – Fiddle

Andrew — Thu, 18 Sep 2025 09:52:56 +0000

The Antal OPF 50 mm Fiddle Block (Model 00507) is engineered for efficient line handling in high-performance sailing applications. Featuring a single 50 mm composite fibre sheave running on a stainless steel hub, supported by Delrin side bearings, the block delivers ultra-low friction and smooth rope movement without the need for lubrication. The one-piece aluminium frame is CNC-machined, hard black anodised and Teflon-coated for maximum strength, corrosion resistance, and sleek aesthetics.

Designed with simplicity and durability in mind, the block uses no assembly pins or screws—resulting in a compact, lightweight profile that doesn’t compromise on strength or performance. The integrated swivel bail provides secure attachment and optimal alignment, even in dynamic load conditions. At just 120 g, this fiddle block offers a Safe Working Load of 500 kg, making it an excellent choice for both racing and cruising sailors who demand top-tier hardware in a minimal footprint.

Specifications
Sheave Diameter: 50 mm
Line Size (Max): 10 mm
Safe Working Load (SWL): 500 kg
Weight: 120 g
Frame Material: Hard black anodised & Teflon-coated aluminium
Sheave Material: Composite fibre resin on stainless hub with Delrin bearings
Part Number: 00507 / ANT00507

The Antal OPF 50 mm Fiddle Block is a premium, low-maintenance solution for sailors seeking efficient, durable, and ultra-lightweight deck hardware for demanding line-handling tasks.

OPF 50 Block – Swivel

Andrew — Thu, 18 Sep 2025 09:52:55 +0000

The Antal OPF 50 mm Swivel Block (Model 00501) is engineered for high-performance sail handling where flexibility, alignment, and low friction are essential. It features a 50 mm composite fibre sheave running on a stainless‑steel hub assisted by Delrin bearings, delivering ultra‑smooth rope movement and minimal drag without need for lubrication. The one‑piece CNC‑machined aluminium frame is hard black anodised and Teflon‑coated, offering outstanding strength, corrosion resistance, and sleek styling.

At its top, a heavy‑duty HR stainless steel swivel shackle provides triple locking positions—swivel, longitudinal, and transverse—ensuring optimal alignment under varying load directions. With no assembly pins or screws, the block remains compact and lightweight, weighing only 140 g, yet supports a Safe Working Load (SWL) of 500 kg. It’s a premium choice for both racing and cruising sailors who demand reliable, low-maintenance deck hardware with superior performance.

Specifications
Sheave Diameter: 50 mm
Line Size (Max): 10 mm
Safe Working Load (SWL): 500 kg
Weight: 140 g
Frame Material: Hard black anodised & Teflon‑coated aluminium
Sheave Material: Composite fibre resin on stainless hub with Delrin bearings
Swivel Shackle: HR stainless steel, triple locking positions
Part Number: 00501 / ANT00501

The Antal OPF 50 mm Swivel Block is a top-tier deck hardware solution combining flexibility, precision alignment, low friction, and robust toughness in a sleek, maintenance-free package—perfect for serious sailors.

OPF 50 Block – Fiddle w/ Becket

Andrew — Thu, 18 Sep 2025 09:52:35 +0000

The Antal OPF 50 mm Fiddle Block with Becket (Model 00508) is engineered for superior performance in high-demand sailing applications. Featuring a single 50 mm composite fibre sheave mounted on a stainless steel hub with Delrin bearings, this block delivers ultra‑low friction and fluid rope movement with no need for lubrication. The one‑piece aluminium frame is precision CNC‑machined, hard black anodised, and Teflon‑coated, offering exceptional strength, corrosion resistance, and a sleek appearance.

Designed for simplicity and durability, this fiddle block has no assembly pins or screws, resulting in a compact, lightweight profile that maintains structural integrity under load. The integrated becket adds versatility, allowing attachment of a secondary control line for enhanced rigging options. Weighing only 130 g, it provides a Safe Working Load of 500 kg, making it an excellent choice for racers and cruisers requiring top-tier deck hardware in a minimalist design.

Specifications
Sheave Diameter: 50 mm
Line Size (Max): 10 mm
Safe Working Load (SWL): 500 kg
Weight: 130 g
Frame Material: Hard black anodised & Teflon‑coated aluminium
Sheave Material: Composite fibre resin on stainless hub with Delrin bearings
Becket: Integrated for secondary line attachment
Part Number: 00508 / ANT00508

The Antal OPF 50 mm Fiddle Block with Becket is an essential component for sailors seeking lightweight, high-performance, and low-maintenance deck hardware with added rigging versatility.

OPF 50 Block – Triple Swivel

Andrew — Thu, 18 Sep 2025 09:52:35 +0000

The Antal OPF 50 mm Triple Swivel Block (Model 00505) is engineered for advanced sail handling requiring maximum flexibility and alignment. It features three 50 mm composite fibre sheaves running on stainless-steel hubs assisted by Delrin bearings, ensuring ultra-smooth rope movement and minimal friction without lubrication. The one-piece CNC-machined aluminium frame is hard black anodised and Teflon-coated, delivering exceptional strength, corrosion resistance, and elegant styling.

A heavy-duty HR stainless steel swivel shackle offers triple locking positions—swivel, longitudinal, and transverse—allowing the block to maintain optimal alignment regardless of load direction. This triple sheave block is ideal for complex rigging systems where multiple lines are managed simultaneously. Its no-pin, no-screw design keeps the unit lightweight yet durable, perfectly suited for demanding marine use.

Specifications
Sheave Diameter: 50 mm
Line Size (Max): 10 mm
Safe Working Load (SWL): 800 kg
Weight: 240 g
Frame Material: Hard black anodised & Teflon-coated aluminium
Sheave Material: Composite fibre resin on stainless hub with Delrin bearings
Swivel Shackle: HR stainless steel, triple locking positions
Becket: No
Part Number: 00505 / ANT00505

The Antal OPF 50 mm Triple Swivel Block offers a premium combination of flexibility, smooth operation, and rugged durability, making it a superior choice for sailors who require reliable, low-maintenance deck hardware for complex sail control systems.

OPF 50 Block – Single Web

Andrew — Thu, 18 Sep 2025 09:52:11 +0000

The Antal OPF 50 mm Single Web Block (Model 00509) is engineered for high-efficiency operation in sailing systems where low friction and minimal decay are critical. Featuring a single 50 mm composite fibre sheave mounted on a stainless-steel hub with Delrin bearings, this block provides fluid rope movement, very low drag, and no requirement for lubrication. The frame is a precision CNC-machined, one-piece, hard black anodized aluminium component with Teflon coating, ensuring maximum strength and corrosion resistance.

Designed for ease of use and longevity, the OPF 50 Web Block omits assembly pins and screws, resulting in a sleek, lightweight profile. The integrated webbing bail allows seamless integration into webbing soft systems or dyneema loops, facilitating secure attachment while maintaining performance integrity. Weighing just 100 g, it supports a Safe Working Load (SWL) of 500 kg, making it an outstanding choice for both racing and cruising applications where performance and durability are essential.

Specifications
Sheave Diameter: 50 mm
Line Size (Max): 10 mm
Safe Working Load (SWL): 500 kg
Weight: 100 g
Frame Material: Hard black anodised & Teflon‑coated aluminium
Sheave Material: Composite fibre resin on stainless hub with Delrin bearings
Bail Type: Webbing
Part Number: 00509 / ANT00509

The Antal OPF 50 mm Single Web Block is a top-tier lightweight, low-maintenance deck hardware solution that delivers high performance and high load capability for sailors who demand the best.