Working on an old 1903 to 1909 Kellogg Compact wooden phone Model 2062. The hook switch mount was broken in 3 pieces. Looks like air bubbles in the cast so poor quality from the factory. The mount is a metal cast, it is not attracted to a magnetic and is of unknown material, but definitely metal. It is under a lot of tension as the spring is still very strong.
I tried JB Weld two part epoxy and backed that up with a quick set two part steel putty, left it for 24 hrs and it failed. I must admit I forgot to clean the joints with an alcohol. The problem is the small contact surface in which to glue.
I am considering
1)Using a normal plumber's solder.
2) Gorilla Glue two part epoxy
3) Some mechanical clamp.
I did test the Gorilla glue on two washers and I cannot get them apart after only 12 hours of cure. Very strong.
I also soldered with 60/40 rosin core solder using flux and electric soldering gun two metal pieces together and again can not break them apart with 50 lbs of force.
Attached are the pieces, I am going to clean them up with my Dermal and clean with Improperly Alcohol 99%.
Does anyone have any other ideas on attaching these 3 pieces back into one?
thanks
Bob
Glue and clamp until the parts can hold themselves together. Then have someone make you a new piece, either by casting or using a 3D printer. It can be done. Just takes time and patience.
Thanks Victor for the suggestions, as this small part is likely pot metal, it will be difficult to fix. I could get a cube of aluminum and file it down to replicate the original. Funny you should suggest 3 D printer. Our local library just bought a cheap one for $1000. But it only does plastic, plus I would need autocad or some other drafting program to then feed into the 3D software.
Anyway, I am cleaning the bits much better this time and have bought Permatex Steel Weld, rated at 4500 psi (two part metal epoxy). I'll give that a try backed up with steel 2 part epoxy along the sides to strengthen. I may just secure with a hose clamp and leave it there, will not look pretty but will work.
I need a junk Kellogg Phone Model 2062 1903-1909 anyways because the small cog wheel that is turned by the big generator wheel is almost stripped of it's spines and it is always slipping when I turn the crank. Anyone have a spare?
Will let you know how the repairs go after 24 hours of cure time.
Bob