Ronstan Series 40 Manual Orbit Ratchet Block With Dyneema Link Head

The popular Ronstan series 40 manual ratchet block with a swivel shackle head.

On this manual model you get to choose whether the ratchet is engaged or not by switching it on and off with the rotating switch.

• Up to 14:1 holding power - highest available!
• Smooth easing of sheets
• Manual ON/OFF ratchet selection
• Swivel shackle head for unlimited block rotation.
• With a Dyneema link head.

Awesome ratchet block holding power
Quite simply, Ronstan Ratchet Orbit Blocks™ have the highest holding power available. The sophisticated NC-machined sheave features Generation 2 of our patented sheave cross-hole geometry. The Series 40 delivers up to 14:1 holding power, almost double that of our nearest competititor.

The unique sheave design has 8 gripping faces which directly resist loaded line movement. Traditional designs have an angled resistance to line movement. Our Generation 2 design has straight resistance faces which both distribute the load and minimise rope wear. These faces are offset from the radial line, to draw the rope down into the gripping area when under load.

Simple and secure attachment
A swivelling shackle is used for attaching the block, which allows for unlimited twists of the block.

Smooth easing of sheets 
With the ratchet mechanism disengaged the sheave and sheet runs out smoothly and freely. When the ratchet is engaged, the sheaves cross hole geometry eliminates the 'shuddering' ease-out that you can expect from traditional v-groove ratchet blocks.

Simple and secure attachment 
The Dyneema^® Link is easily fitted and is retained securely by a moulded retainer clip. The flexible link can be left with one end attached to the block when fitting - no more lost shackle pins.
This system is compatible with Dyneema^®/Spectra^® strops, webbing and carbon connection points - much more so than steel loop tops or shackles. 

Low profile stand-up kit allows 0° or 90° alignment
Stand-up kits feature a clatter-free rubber boot. You can attach the Dyneema^® link so that the block is aligned with the stand-up base or across it. It's a neat low-profile solution which allows full articulation.