Match your halyard or sheet's actual diameter to a clutch's rated line-size range first, then confirm the clutch's maximum working load (MWL) covers your line's expected load — Antal's rope clutch range alone spans 6–16 mm and 500–2,100 kg across single, double, and triple banks. MAURIPRO carries the full Antal CAM 611 and V-Grip range, so you can match the clutch to the line instead of guessing from boat length alone.
This is written for the cruiser (~30–45 ft) replacing a worn clutch, adding a new control line at the mast or cockpit, or fitting out a fresh run of halyards and sheets, staring at a wall of similar-looking black rope clutches with no clear way to tell them apart. Every rope clutch — whatever the brand — is built around two numbers: the range of rope diameters its cam is cut to grip, and the maximum load its base and cam are rated to hold. Get either one wrong and the clutch either won't seat the line cleanly or won't hold it reliably under load.
Antal's own line is a useful real-world example because one family covers the full range a mid-size boat is likely to need: a compact CAM 611 for control lines, the V-Grip 10 and V-Grip 12 for genoa sheets and secondary halyards, and the V-Grip Maxi and V-Grip Plus for a boat's primary halyard or mainsheet.
Rope clutch sizing at a glance (Antal range)
| Model | Line size | Max working load (MWL) | Bank | Example |
|---|---|---|---|---|
| CAM 611 | 1/4–3/8 in (6–10 mm) | 500 kg (1,102 lb) | Single | Antal CAM 611 Single, 6-10mm |
| V-Grip 10 | 5/16–1/2 in (8–12 mm) | 1,000 kg (2,205 lb) per line | Single or double | Antal V-Grip 10 Single, 8-12mm |
| V-Grip 12 | 3/8–9/16 in (10–14 mm) | 1,300 kg (2,866 lb) | Single | Antal V-Grip 12 Single, 10-14mm |
| V-Grip Maxi | 9/16–5/8 in (14–16 mm) | 2,100 kg (4,630 lb) | Single | Antal V-Grip Maxi Single, 14-16mm |
| V-Grip Plus | 9/16–5/8 in (14–16 mm) | 2,100 kg (4,630 lb) per line | Triple | Antal V-Grip Plus Triple, 14-16mm |
Line size and MWL figures per Antal's published technical specifications for each model, verified live against MAURIPRO's own product data on 2026-08-22.
Shop all Antal rope clutches →
How do you match a clutch's line-size range to your actual line?
Measure your halyard, sheet, or control line's diameter with calipers, not by eye, and compare it against each model's minimum and maximum line size. Antal's own numbers show why this matters: an 11 mm line sits at the very top of the V-Grip 10's 8–12 mm range but comfortably inside the V-Grip 12's 10–14 mm range, so if that line is likely to be re-run at a slightly larger diameter down the road, the V-Grip 12 leaves headroom the V-Grip 10 doesn't. A line outside a clutch's rated range either won't seat cleanly in the cam (too thick) or won't grip reliably under load (too thin).
How much working load do you actually need from the clutch?
Check the clutch's maximum working load (MWL) against the load your line is realistically expected to carry — not just its diameter. Per Antal's specifications, the compact CAM 611 tops out at 500 kg, the V-Grip 10 at 1,000 kg, the V-Grip 12 at 1,300 kg, and the V-Grip Maxi and V-Grip Plus at 2,100 kg. A thin, high-modulus line under real load can outrun a small clutch's MWL even though the rope itself fits the cam, so treat line size and load rating as two separate checks, not one. Leave margin between your line's expected working load and the clutch's rated MWL rather than sizing to the exact limit — dynamic loads, like a gust filling the main or a spinnaker halyard snapping taut, spike well above steady-state load.
Single, double, or triple — how many lines can one clutch bank hold?
Antal builds most of the V-Grip range in single, double, triple, and quadruple banks, and each additional station is a complete clutch mechanism — its own cam, base section, and handle — sharing a common housing rather than one mechanism split across multiple lines. That means a double V-Grip 10 holds two lines, each still individually rated to the model's full 1,000 kg MWL, not 500 kg split between them. Size the bank to how many control lines genuinely terminate at that spot on deck — halyard, reef line, outhaul, cunningham — rather than to whatever open deck space happens to be available; a wider bank than you need adds weight and cost without adding capacity you'll ever use.
Which Antal rope clutch should you choose?
Choose the CAM 611 for lighter-duty control lines under roughly 500 kg — reefing lines, cunninghams, outhauls, or a boom vang control line on a mid-size cruiser. Choose the V-Grip 10 for genoa sheets and secondary halyards in the 8–12 mm, up-to-1,000 kg range that covers most 30–38 ft cruisers' everyday running rigging. Step up to the V-Grip 12 when your line runs closer to 12–14 mm or the load edges toward 1,300 kg, which is common on a 38–45 ft boat's primary genoa sheet. Reserve the V-Grip Maxi or V-Grip Plus for the single highest-load line on the boat — typically the main halyard or a primary sheet on a larger cruiser — where the 2,100 kg rating and 14–16 mm range give real margin over the load that line will ever see.
Expert notes
From our rigging bench: the most common sizing mistake we see isn't the wrong model line, it's ordering by boat length instead of by measured line diameter — a 40-footer can legitimately run an 8 mm spinnaker halyard alongside a 14 mm primary sheet, and each needs its own clutch sized to that specific line, not to the boat as a whole.
On boats upgrading to Dyneema or other low-stretch cores, measure the actual installed line before ordering a replacement clutch — low-stretch line is often run a size or two smaller in diameter than the double-braid it replaces, which can shift you into a smaller clutch model than the one you're removing, not a larger one.
Common mistakes
- Sizing to boat length instead of measured line diameter. Two lines on the same boat can need two different clutch sizes — measure each line individually.
- Checking line diameter but skipping the working-load check. A thin, high-load line can fit a clutch's cam and still exceed its MWL.
- Sizing a bank to available deck space rather than to the number of lines that actually terminate there. An oversized bank adds cost and weight without adding usable capacity.
- Assuming a double clutch splits one line's load across two mechanisms. It doesn't — each station in a multi-line bank is a complete, independently rated clutch.
Frequently asked questions
How do I know what size rope clutch I need?
Measure your line's actual diameter with calipers and match it to a clutch's rated minimum-maximum line-size range, then separately confirm the clutch's maximum working load (MWL) covers your line's expected load. Antal's range alone runs from the CAM 611 (6-10 mm, 500 kg) up to the V-Grip Maxi and V-Grip Plus (14-16 mm, 2,100 kg).
What's the difference between a rope clutch's line size and its working load rating?
Line size is the range of rope diameters the clutch's cam is physically cut to grip; working load (MWL) is the maximum load the clutch's base and cam are rated to hold. A line can fit a clutch's cam and still exceed its working load, so both need to be checked separately.
Can one rope clutch hold more than one line?
Yes — Antal builds most V-Grip models in double, triple, and quadruple banks, where each station is a complete, independently rated clutch mechanism sharing one mounting base, not one mechanism dividing its rated load across multiple lines.
Does a bigger boat always need a bigger rope clutch?
Not necessarily. A larger cruiser can still run a thin, low-stretch control line that needs only a compact clutch, while a smaller boat's primary sheet in traditional double-braid can need a larger-rated model — size to the specific line, not to overall boat length.
Where can I buy Antal rope clutches sized to my line?
MAURIPRO carries Antal's CAM 611 and full V-Grip range — see the collection link below to shop by line size and bank configuration.
Recommended gear
Antal CAM 611 Single, 6-10mm — a compact clutch for reefing lines, cunninghams, and other control lines under 500 kg.
Antal V-Grip 10 Single, 8-12mm — the balanced choice for genoa sheets and secondary halyards on a mid-size cruiser.
Antal V-Grip 10 Double, 8-12mm — two independently rated 1,000 kg stations for boats banking two lines at one spot.
Antal V-Grip Plus Triple, 14-16mm — three 2,100 kg-rated stations for a boat's highest-load lines.
Shop all Antal rope clutches →
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- How Does a Rope Clutch Work?
- What Is a Swivel Cam Cleat, and When Do You Need One?
Last updated: August 22, 2026.