Thread: Railway clock

Originally Posted by Swifty

Hi,
Below some pictures of the first clock I made.
Also, what may be the easier way for the half turned columns and ends - should I make full ones and just destroy one half instead of laminating before turning with paper and split after turning?
Thanks!

Nice looking clock.

Laminate with paper and split after turning. You will then end up with identical columns

G'day Swifty,
Nice looking clock.
Hermle movements are usually very accurate, what movement are you using,
Numbers and type eg( Blackforrest 451/45 )will tell me the movement and pendelum length that is optimal for it.
You should have an adjustable pendelum and to regulate it requires moving the bob up or down the stick.
This should work as long as it is a new movement, if it is older it may need some work.
Post the movement type and numbers and I will try to assist.

Catch ya
Andrew

y not turn a single collum and saw it down teh middle.

nice jod by the way

Nice work with your clock.
You should be able to adjust the pendulm speed (swing)by turning the knob at the bottom of the pendulm disk.Anticlockwise to make slower or clockwise to make the time faster.
I would turn a solid column leaving a square top and bottom then rip on a saw or bandsaw.Not really safe joining two halves with paper and turning it.Cheers

Split turning columns has been practiced forever and is the easiest method for turning identical half columns.
If you turn the column then saw down the middle they are not true halves and look strange.
Modern glues are so strong the biggest problem is splitting the two halves after turning.
If you are at all worried the joint may split while turning, just wrap some tape around the ends to give you peace of mind.

Nice piece Swifty!! I like it!

Thanks for your comments everyone.

rav & tazchris: The movement and pendulum are fine and there is no trouble with them. In older times, pendulums were made with a combination of metals with differing expansion properties which kept the pendulum at exact length through seasonal temperature variations - I was just wondering whether Hermle pendulums had this property. I will call them and ask.

Sprog thanks for the verification, thought I might have to go that way with the laminate - I was a bit apprehensive but I will give it a go!

G'Day swifty,
Hermle still make multi bar pendelums, but yours is a Stick pendelum the multi bar pendelums have 5 to 9 bars of different metals to compensate for temp change.
Your movement should only need bob adjusment, a half turn at a time then check the gain or loss.
When I build a clock with a mechanical movement it is on the test bench for up to 3 weeks before it is fitted into a clock and then 1 week after before delivery to calibrate time.
cheers Andrew