ST to Hermle conversion

[busszz]

I ordered a 350-020 Hermle to replace a Seth Thomas 402-005. It came in and when I went to install it I found the hammers were oriented in the wrong direction (i.e. the ST hammers ran to the outside of the movement, the Hermle ran towards the middle.) I;ve been trying to figure out how to swap thme. Moving the ST hammers to the Hermle doesn;t seem easy since the Hermale cylinder spins in the oposite direct of the ST and the hammer won;t work. For the same reason I can;t just turn the Hermle hammers around.
Any ideas on what can I do?

[busszz]

I ordered a 350-020 Hermle to replace a Seth Thomas 402-005. It came in and when I went to install it I found the hammers were oriented in the wrong direction (i.e. the ST hammers ran to the outside of the movement, the Hermle ran towards the middle.) I;ve been trying to figure out how to swap thme. Moving the ST hammers to the Hermle doesn;t seem easy since the Hermale cylinder spins in the oposite direct of the ST and the hammer won;t work. For the same reason I can;t just turn the Hermle hammers around.
Any ideas on what can I do?

[T.J. Kloss]

It seems to me, the only way to go is to re-mount the chime rods to get them in front of the hammers. Also keep in mind that, if you can do this, the hammer sequence may be reverse from the Seth Thomas movement. You may have to re-arrange the chime rods in their holder to get the correct tune to play.

Tom

[David Robertson]

Dead,

At the risk of stating the obvious... what about sending the unit back and getting one with proper hammer orientation?

David

[busszz]

Huh?...I havn't done a conversion like this before..I didn't even think to see if they had one with that hammer orientation.

[busszz]

Alas...ordering the hammer in the proper orientation is not an option. I spoke with Black Forest Imports and they said they best way to go is to do as Tom suggested and and move the rods.

[shutterbug]

The next question, are the rods threaded? If so, the converstion should be pretty easy. If not ....:smile:

[Mark A. Butterworth]

Although we did not sell the unit, I would like to make a couple of points that might be helpful.
First, that ST unit with the old style hammers is no longer available.
Second, the hammers cannot be reconfigured, the chime rods must be reconfigured.
Third, to accomplish this, reverse the order of the rods in the chime block and then reverse the direction of the chime block in the case. The alternative is to replace the chime block altogether, but it still needs to be reversed in the case.

[LaBounty]

One other solution would be to restore the Seth Thomas 402-005 movement. But that would certainly entail several re-pivots and twenty plus bushings.

As these movements slowly become unavailable, this option will become increasingly necessary in order to avoid major changes to the clock.

Good luck with it!

[Scottie-TX]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Third, to accomplish this, reverse the order of the rods in the chime block and then reverse the direction of the chime block in the case </div></BLOCKQUOTE>
I'm missing something: We reverse the rods in the block then reverse the mounting of it. Seems like we're back where we started with two reversals.

[Joe Collins]

Hey Scottie,
If you reverse the chime block in moving it to the other side the rods will have been reversed. Now the rods themselves must be reversed so as to line up with the proper hammer. Kapish?

Joe

[BIG D]

So why not just move it over and not ever reverse it???

[Joe Collins]

Don,
If I remember right the hammers on the S/T stick out on the side of the movement while those on the Hermle are turned back, across, the movement. So actually what you are doing is rotating the base 180 degrees and remounting it. That reverses the rod sequence. Reversing the order of the rods brings everything back in proper order.
Thats how I remember it anyway.

Joe