Please select your home edition
Allen Brothers

New Allen Product: Tii-LOCK-40

by Allen 24 Mar 05:00 PDT
The new Tii-Lock-40 © Allen

Ever wanted to easily attach one of our Tii-on blocks via a continuous spliced loop? Well, now you can with the new Tii-Lock-40.

Tii-Lock-40 is a small T shaped plastic moulding which fits perfectly into the central hole of our 40mm Tii-on Block. It allows for a continuous spliced loop to be locked into place, with no chance of it shaking free.

The new concept was developed to give a quick, easy and strong option for attaching the A2040Tii block. The Tii-Lock-40 also makes replacing the blocks on the RS Aero boom really straightforward.

Why use a continuous loop?

Utilising a continuous spliced loop ensures the attachment of the block is as strong as possible, with minimal chances of failure.

A rope which is spliced can retain 80% 100% of its quoted breaking load. Whereas a knotted rope can retain 20% 50% of its quoted breaking load (percentage depends on the type of rope, knot or splice in use).

Eliminating a knot also ensures that there is nothing to snag or come undone.

How to use the Tii-Lock-40

The Tii-Lock-40 can be installed either way up, but we recommend having the bigger section facing towards the top of the block. So it resembles a T shape. You will notice the underside of the thicker T section has grooves running on either side of the post. This is to allow the rope to sit nicely around the Tii-Lock-40.


Check out the following videos to see a 40mm Tii-on block installed to an OK and RS Aero boom, using a Tii-Lock-40.

Attaching a 40mm Tii-on block to an RS Aero boom

In the following video, we are attaching a 40mm Tii-on block to an RS Aero boom. For those that dont know, the RS Aero has a carbon boom with holes drilled in the underside. Dyneema is then looped, knotted and pulled through the hole with a mouse line. You are then left with two loops hanging from the boom to attach a mainsheet block.


Attaching a 40mm Tii-on block to an OK boom

Weve been manufacturing OK and Finn booms for a long time. But recently we have taken a fresh look at how we fit them out. Using through deck thimbles we have created a really neat solution for attaching the boom blocks. It does of course require a Tii-Lock-4040mm Tii-on Block and a continuous spliced loop.

40mm Single Tii-On
40mm Single Tii-On
OK Boom
OK Boom
Follow us on social media
Copyright © 2022 Allen Brothers, All rights reserved.

Related Articles

Allen's Hatch Cover Bag
Quickly and easily maximise storage space on your dinghy Looking for a place to stash your snacks, drinks bottle or even a few spare parts whilst out on the water? There's only so many things you can shove in the front of your PFD, so fitting a hatch cover bag will quickly maximise storage space on your dinghy. Posted on 11 Aug
The lightest and strongest
The new TiiTAN block's breaking load is 1250kg A key feature within the TiiTAN bearing system is the use of a precision plain bearing washer. When the TiiTAN is exposed to extreme static loads, which would normally cause damage to the internal bearing system, it changes to a plain bearing block. Posted on 2 Aug
The new TiiTAN Block
Charting new territory for the small pulley market Introducing the TiiTAN Block, the latest high-performance sailing pulley from Allen. The TiiTAN is a further development of the industry-leading XHL block range and is charting new territory for the small pulley market. Posted on 14 Jul
New Allen Product Range: DB Deck Organisers
Lead or divert control lines and halyards with minimal friction Lead or divert control lines and halyards with minimal friction. The Allen DB deck organiser range is available in 20, 30 and 40mm sheave sizes. All feature two lightweight aluminium cheeks, three dynamic bearing sheaves, a becket and nuts and bolts. Posted on 7 Jul
New Allen 40mm Flip Flop Block
Featuring a laser-cut stainless-steel body and backing plate Flip flop blocks are designed to pivot around a central fixing point, this keeps the rope close to the deck, mast or boom whilst still allowing the block to articulate to the correct lead angle, ensuring friction stays as low as possible. Posted on 9 Jun
Allen ILCA Wear Protectors
Stop the damage which can be caused by the mainsheet traveller blocks Introducing the ILCA Wear Protectors, a product designed to stop the damage which can be caused by the mainsheet traveller blocks, ensuring your boat stays protected. Posted on 26 May
How to service Ball Bearing Cam Cleats
A vital part of most control systems on both dinghies and yachts Cam cleats are a vital part of most control systems on both dinghies and yachts. Without them, you would have to hold onto the rope for hours or make the rope off around a horn cleat, not ideal if you want to quickly adjust something! Posted on 9 May
Optimist Sprit System Race Pack
Pre-spliced and race-ready Allen's new pack is pre-spliced and race ready, so all you need to do is attach it to the boat for the smoothest and best looking setup available. Posted on 14 Apr
Allen Hardware Partner to Canadian Sailing Team
Sail Canada is glad to see Allen Brothers join the team in its pathway toward the 2024 Olympic Games "Sail Canada is glad to see Allen Brothers join our team in its pathway toward the 2024 Olympic Games," said Sail Canada High-Performance Director, Mike Milner. Posted on 4 Apr