5 min read · Updated 19 May 2026
A grinding pedestal is a deck-mounted, hand-cranked station that drives a yacht's winches through an internal gearbox — turning crew muscle into the heavy pulling power needed to trim sheets and hoist halyards on a Grand Prix yacht. Two crew stand at the pedestal and wind its handles, and the gears below convert that effort into rotation at a winch drum, where a sheet or halyard is wrapped. It is one of the simplest ideas on a racing deck and one of the most important, because on a powerful boat no single sailor can hold a loaded sail by hand.
This guide explains what the pedestal and winch system does, how power travels from the handles to the lines, the types of winch involved, who works them, and how the Melges 40 lays it out.
What a grinding pedestal and winch system does
The job of the system is to multiply force. A racing sail under breeze can load a sheet with more pull than a person can resist, let alone move. The winch solves the holding problem — line wraps several turns around a drum, and friction lets the drum grip the line so the load can be held or eased in a controlled way. The pedestal solves the power problem, giving two people a comfortable cranking action and gearing their effort up to the drum.
Mechanically, a pedestal is a vertical column carrying two opposed handles linked to a drive shaft. Turning the handles spins the shaft, which connects through gears or chains to one or more winches. Some pedestals drive a winch directly beneath them, and others link across the deck to drive a primary winch on either side, so the same two grinders can serve whichever side is working. This is why grinding is so often a two-person, full-body effort rather than a single sailor on a winch handle — the pedestal is built to take both crew's combined strength and feed it into the drum.
How power gets from the grinders to the sheets
The link between hand and load runs through gearing, and gearing is always a trade between speed and force. In a low ratio the handles turn quickly and the drum spins fast, so line comes in rapidly while the load is still light — useful early in a hoist or a sheet-in. As load builds, the crew shift to a higher ratio. Now each turn of the handles moves less line but the drum can pull far harder, so a heavily loaded sail can still be sheeted home.
The lightweight MX-type pedestals used on modern keelboats run two chains down the column, offering a direct drive or an overdrive ratio engaged by pushing in the top spindle — so the crew can change gear without leaving the handles. Combined with a multi-speed winch, a single pedestal gives several effective speed-and-power settings across a manoeuvre. The principle is the same one a cyclist uses with gears — spin fast and light to gather speed, then change down to grind against a heavy load.
Winch types and their roles
Not all winches do the same job, and the names describe where they sit in the trimming hierarchy.
- Primary winches are the largest, handling the headsail and spinnaker sheets that carry the biggest loads. These are the winches a pedestal most often drives, because they need the most power.
- Secondary winches take lighter or intermittent jobs — a secondary sheet, a tack line, or a backup lead — and may be cranked with a handle rather than driven by the pedestal.
- Halyard and pit winches handle hoists and drops and the control lines that run back to the pit, the area where halyards are managed.
Most racing winches are self-tailing, meaning a jaw at the top grips the tail of the line so the crew do not need a separate person holding it. The primary winches work the small-diameter, high-strength lines used with modern racing sails.
Who works the pedestal — grinders, trimmers and pit
Three roles share the system. Grinders provide the power, turning the pedestal handles on command — a physically demanding job that directly affects how fast and cleanly the boat manoeuvres. Trimmers read the sail and the boat, calling for more or less and easing the sheet through their hands or a clutch while the grinders supply the load. Pit sits at the centre of the boat and manages the halyards and control lines, keeping everything free to run during a hoist or drop.
On a smaller crewed boat the lines between these roles blur. One sailor may grind their own winch while trimming, and a manoeuvre such as a gybe will see crew swap quickly between pedestal handles, winch tails and control lines. The full breakdown of who does what is set out in our guide to yacht racing crew positions.
The Melges 40's pedestal and deck layout
The Melges 40 carries a deliberately simple deck inspired by larger Grand Prix yachts such as the TP52. Central to it is an aft grinding pedestal — a six-speed Harken MX Air — mounted just off centre near the head of the rudder stock, where two crew can work it within reach of the trimmers and the helm. The mainsheet traveller runs across the back of the cockpit, keeping the main trimmer's controls close to hand.
The Air designation points to Harken's lightweight, aerodynamically shaped pedestals, built with composite parts and carbon-reinforced drive belts to cut weight on deck. Saving mass high up and topside matters on a light, powerful one-design, where it sharpens handling and reduces pitching. Exact model designations can change with class specification, so confirm them against current class documentation before relying on the detail.
This emphasis on lightweight, high-strength deck gear is part of a wider theme across the boat's carbon masts and rigging, where every component is chosen to handle racing loads at the lowest possible weight — the modern, one-design approach explored across our programme.
Frequently asked questions
- What is a grinding pedestal on a yacht?
- A grinding pedestal is a deck-mounted grinding station with two handles that crew turn by hand. Through an internal gearbox it drives one or more winches below or beside it, so the crew can apply far more power to sheets and halyards than they could by winding a winch handle directly.
- What is the difference between a grinder and a trimmer?
- A grinder supplies the muscle, turning the pedestal handles to load and ease the lines, while a trimmer reads the sail and calls for more or less. On smaller Grand Prix keelboats one person often does both, grinding the winch and trimming the sheet in the same movement.
- How does a grinding pedestal multiply power?
- The pedestal contains gears that trade hand speed for load. In a low gear the crew turn quickly to pull line in fast under light load, and in a high gear each turn moves less line but handles much heavier loads, letting two people sheet on a sail that would otherwise be impossible to trim by hand.
- What winches does the Melges 40 use?
- The Melges 40 is fitted with Harken hardware, including a six-speed Harken MX Air aft pedestal and Harken primary winches. The exact model designations are best confirmed against the current class specification before relying on them.
- Why are modern grinding pedestals made of carbon?
- Carbon and other composite parts cut weight high up and on deck, where it most affects a yacht's stability and motion. Lightweight pedestals use composite components and carbon-reinforced drive belts to reduce mass without losing the strength needed to handle racing loads.