How to measure the Hermle quartz handshaft
How to measure the Hermle Quartz handshaft is done by the entire hand shaft post that sticks out of the movement, from the plastic and all they way out. We measure this different as we go by just the threaded post that goes through the dial and mounts with the hex nut only.
Hermle used three hand shaft lengths on there base units, these lengths are 16mm, 21mm, and 26mm. There was a time some of the 26mm were modified internally to create a extremely long hand shaft, something like 1 1/4 or 1 1/2 inches, if you have one like this there is no luck for replacement.
The following is a guide line for the old Hermle Quartz hand shaft length, to the length of the threaded post to order from us. It makes it simplistic to just do the following 1. measure the hand shaft on your current Hermle quartz clock movement, 2. Convert to the post length needed with the below information, 3. order whatever movement you would like from us with that post length.
- 16mm (About 5/8") = Get a 5/16 post
- 21mm (About 3/4") = Get a 7/16 post
- 26mm (About 1") = Get a 11/16 post
Next step to replace the Hermle quartz
Now that your old unit is out of the way and you have converted the old hand shaft length to the new post length, we are ready to shop for a replacement. The next step is to take note of the overall size of the new movement and be sure that it will fit in behind the dial ok.
The new unit maybe taller or wider and we just want to be sure it will fit in there. If verified its ok, we can pick a new unit with the post length that was converted. Be sure to get new hands when your done, they are on the same page as the product. This is your old ones will not fit without modifications.