BRASS CLOCK CRANK KEY SIZES 00-13 longcase grandfather clocks winding wind keys

Brass crank winding key for longcase and grandfather clocks, available in sizes 00-13 covering 2mm-5.5mm square shanks.

⭐ At a glance

📏 Sizes 00-13 available, covering a 2mm-5.5mm shank range

✅ Made for grandfather (longcase) clocks

📦 One key supplied per size selected

Material: Brass

Colour: Gold

🔧 What it does & how to use

A winding key is the simple tool used to wind the mainspring of a longcase or grandfather clock by hand, turning the square arbor that drives the movement. Clock winding squares vary in size, which is why these keys are offered across the full 00-13 range so you can match your own clock's arbor.

• Check the arbor: Measure the square winding hole on your clock's dial or movement.
• Select the size: Choose the key number (00-13) that corresponds to that measurement.
• Fit the key: Push the square end of the key fully onto the winding arbor.
• Wind: Turn the key in the correct direction for your movement (usually clockwise) until you feel resistance, then stop.

⚠️ Please check the exact size of your clock's winding square before ordering, as keys are sized individually and an incorrect size will not fit securely.