CLOCK CRANK KEY ALL SIZES BRASS 0-13 grandfather longcase clocks winding keys

Brass crank winding key with a turned wood handle, available in sizes 0-13 (2.25mm-5.5mm) to match the square winding arbor on grandfather and longcase clocks.

⭐ At a glance

📏 Sizes 0-13, covering 2.25mm-5.5mm square arbors

✅ Fits grandfather, longcase and other old clocks with a matching square winding arbor

Handle: Wood, brass crank body

✔️ Reproduction key, sold individually per size

Specifications

• Type: Clock key
• Material: Wood
• Compatible Product: Grandfather clock
• Compatible Model: Old clocks
• Age: Reproduction

🔧 What it does & how to use

A winding key lets you wind the mainspring of a longcase or other old clock by turning the square winding arbor found in the clock face or movement. It's an essential bit of kit for anyone running an antique or reproduction clock without its original key.

• Measure first: check the size of the square winding arbor on your clock (in mm) before ordering.
• Choose the size: pick the key size, 0-13, that matches your arbor measurement.
• Fit the key: push the crank's square socket fully onto the winding arbor.
• Wind: turn the crank smoothly clockwise (or as the movement requires) to wind the mainspring.
• Stop at resistance: ease off once you feel firm resistance to avoid overwinding.

⚠️ Please check your clock's winding arbor size carefully before ordering, as these keys are sized individually from 0-13 and the wrong size won't grip the arbor properly.