02/10/2026
Not a huge amount of wear at the escape wheel, but enough to cause the escapement to get hung up on the entry side.
Closing the wear, ideally with a bushing, perhaps a little work will be required on the pivot, to be determined. That will at least allow the escape wheel to pass.
However, there are other forces at play here that will make this escapement very sensitive to any future wear and not as efficient as it should be!
In particular I'm talking about drop, the space that is left between the jewel that has just been impulsed and the passing escapement tooth, measured as the escapement locks. There seems to be very little, if any, drop present (hard to see with all the gunky oil). A small amount of drop is required; too much is a waste of energy, too little the teeth may not clear the pallets. Think of drop also as a safety measure for manufacturing errors, no circle can be machined perfectly round or gear perfectly centred.
Also note how the jewels are set; the flat plane of the jewel should be parallel to the pulsing face of the escape wheel tooth. This current setup is not efficient; when the tooth drops onto the jewell it should be tangential to the curve.
