Mainsprings

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The Loop-End clock mainspring description is a long flat spring with a loop on one end. This loop gets wrapped around the outer plate pillar of the movement. In other words, this is the type of mainspring that can be seen. It is not contained in a barrel. Likewise, if the spring is in a barrel, the mainspring can’t be… View Product

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When a mainspring breaks within a clock movement, it could cause damage. The damage could be within the movement itself or to the clock case. It is uncommon but sometimes even the sides of the wood case get damaged when a mainspring breaks. As for the movement itself, we need to check the gear teeth and the gear arbors. The… View Product

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Loop end mainsprings are measured by width, thickness, and length. These are not always easy measurements to get, and the mainspring would need to be removed from the clock. It can be a frustrating puzzle to do, and a dangerous one also. But if your learning clock repair or have time on your hands so to speak, here are some… View Product

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Barrel Number Mainspring Dimensions MM 10 17 x .45 x 1490 11 17 x .42 x 1500 20 & 56 17 x .38 x 1200 21 & 50 17 x .40 x 1200 31 12 x .34 x 1150 32 12 x .42 x 1100 33 12 x .32 x 1150 40 17 x .38 x 1100 41 21 x… View Product

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Often a clock mainspring barrel can be removed without disassembling the clock movements outer plates. The mainspring will also still be contained within the barrel. The mainspring let down tool allows the release of the mainspring with the fist rather than the fingers. Put the mainspring let down tool over the square post the key goes onto. With a flat… View Product

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For a hole-end clock mainspring replacement, send clockworks the clock barrel and we will swap out the mainspring. Leave the Hole-End clock mainspring within that barrel. The price for this service is $80 and includes the cost of the Hole-End mainspring and shipping back. clockworks.com will remove the broken or worn spring from the container in a safe way. Then… View Product

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When a clock mainspring breaks the impact can cause damage to the movement. Damage would be within the parts of the gear train itself. It is possible that the pivots that go into the outer plates or the arbors have bent. Best to check the clock movement’s condition before ordering a clock mainspring. If working with a hole end clock… View Product

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The type of springs that are wound in a brass barrel enclosure is known as a Hole End Mainspring. Measure the Hole End Mainspring by taking the spring out of the brass clock movement barrel. The mainspring has to come out of the brass barrel in order to measure it. There is no other way to do this task. This… View Product