NINE Different Sizes of Double END Brass Clock KEY, Size: 1.75mm No.4-12

Double End Clock Winding Key 1.75Mm – Select Your Size

This double end clock winding key 1.75mm is designed as a practical replacement winding key for many compatible mechanical clocks. 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 mild steel 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: Mild steel
• Small end: 1.75 x 1.75mm
• Available sizes: 9 selectable options
• Application: Many compatible mechanical clocks

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.

Explore More Winding Clock Keys

Our Winding Clock Keys range includes single-end, double-end, crank and vintage keys in a variety of sizes for antique, vintage and mechanical clocks.