NINE Different Sizes of Carriage Double End Brass Clock Key – Premium Quality

Carriage Double End Brass Clock Key – Select Your Size

This carriage double end brass clock key is designed as a practical replacement winding key for carriage clocks and other compatible mechanical timepieces. It is available in a range of square sizes so the correct fit can be selected for the winding arbor rather than relying on a loose universal fit.

The key is manufactured from brass for durability during normal clock winding and servicing. The smaller end measures 1.75 x 1.75mm, while the larger end is selected from the size options below. A properly sized winding key should fit the arbor securely without excessive play.

Clock key numbers can be useful as a guide, but the most reliable method is to measure the square winding arbor with a caliper. Choose the option that matches the arbor as closely as possible and never force a key that feels too tight.

Available Sizes

• No. 4 – 3.25 x 3.25mm
• No. 5 – 3.50 x 3.50mm
• No. 6 – 3.75 x 3.75mm
• No. 7 – 4.00 x 4.00mm
• No. 8 – 4.25 x 4.25mm
• No. 9 – 4.50 x 4.50mm
• No. 10 – 4.75 x 4.75mm
• No. 11 – 5.00 x 5.00mm
• No. 12 – 5.25 x 5.25mm

Product Details

• Material: Brass
• Small end: 1.75 x 1.75mm
• Available sizes: 9 selectable options
• Application: Carriage clocks and other compatible mechanical timepieces

Important

Please measure the square winding arbor before selecting a size. The listed dimensions refer to the internal square opening of the key. Using an incorrectly sized key can round or damage the winding arbor.

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