Bushing blunder advice on ansonia crystal regulator movement

[Jim Lampros]

Well I am bushing this ansonia 3 inch plate and I hastily used a 3.5 mm # 4 reamer and made the hole too big. The pivot is .99 mm and there is no bushing that is 3.5 mm od and small enough id to use. Is there anything I can do ? I tried bushing the Bush but it popped out and now I'm at risk of getting another 3.5 od in there.. any advice is appreciated..

 

[wisty]

1) Make a suitable bushing on a lathe.
or
2) insert the biggest 3.5mm Bush you have using Loctite red. Leave for 24 hours. Rebush down to size with the smallest OD you have that will accomodate the pivot.

 

[Jim Lampros]

1) Make a suitable bushing on a lathe.
or
2) insert the biggest 3.5mm Bush you have using Loctite red. Leave for 24 hours. Rebush down to size with the smallest OD you have that will accomodate the pivot.

Thank you so much !!! I'm on it..

 

[John P]

You won't find the following repair in any clock manual. It was shown to me by an old clock master now deceased.

One can resize a bushing hole by using a steel ball bearing. Lay plate on flat hard surface or stump, place ball bearing over hole and gently tap the bearing twice. Do both sides. Hole is now smaller.


johnp

 

[Simon Holt]

One can resize a bushing hole by using a steel ball bearing.

Can you offer any guidance on how big the ball bearing needs to be, in comparison to the bushing hole?

Simon

 

[shutterbug]

I think the ball bearing trick is for minor changes. A mm or more is pretty big.

 

[R. Croswell]

Can you offer any guidance on how big the ball bearing needs to be, in comparison to the bushing hole?

Simon

This procedure should not be used. Any process that makes the hole smaller simultaneously has to make the plate thinner. It will also create a hole with non-parallel sides that will have a hard time securely holding the bushing. I would say the preferred method would be to make a custom bushing with the correct ID for the pivot and the correct OD for the hole. Also acceptable, ream the hole (with a bushing reamer, not a tapered broach) for the next size bushing, then ream that bushing for a bushing that fits the pivot. If the holes are reamed with the correct size reamer held perfectly perpendicular to the plate, (not easy with a hand-held reamer) there should be no issue with keeping the bushings in place and there should be no need for Loctite.

RC

 

[JeffG]

Maybe install a solid bushing of the correct size, then drill a hole on center and broach to fit the pivot?
-Jeff

 

[bruce linde]

wondering if the OP was able to get past this hurdle? it's been a couple of months...

 

[wow]

Some suppliers sell blank bushings in each of the reamer sizes. The easiest way, in my opinion, is to buy a pack of each size for occasions like this. Just pop in the blank and drill a small hole like Jeff said and ream it to the ID needed.

 

[Allan Wolff]

Bergeon 3.5mm bushings will fit in a hole reamed by the #4 KWM reamer.
Brass Bergeon Style Bushing 20-Pack (3.5mm OD x 2.0mm H x 1.0mm Bore)