Author Topic: Taking out screws on ringer assy that hold coils  (Read 1626 times)

Offline djtownsend

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Taking out screws on ringer assy that hold coils
« on: May 10, 2011, 04:40:42 PM »
I don't know if anyone else has had this problem but I have a couple of ringer assemblies that I want to take apart so I can remove the coils and refinish the metal parts of it.  I am having a real hard time removing the screws which hold the coils in place and am close to stripping the screws.  A picture below shows the screws I'm talking about.

Does anyone have any feedback on removing these screws without damaging the screws themselves?

Any feedback would be appreciated.

Dan

Offline HarrySmith

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Re: Taking out screws on ringer assy that hold coils
« Reply #1 on: May 10, 2011, 05:31:16 PM »
Maybe some penetrating oil or some heat to the other end where the threads are would help. Or an impact driver.
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Offline djtownsend

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Re: Taking out screws on ringer assy that hold coils
« Reply #2 on: May 10, 2011, 05:43:53 PM »
Yeah, I tried an impact driver w/ no luck.  I'll try penetrating oil like you suggested.  Thanks.

Dan

Offline Wallphone

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Re: Taking out screws on ringer assy that hold coils
« Reply #3 on: May 10, 2011, 06:36:17 PM »
Dan, Since you are probably going to have to replace the screws when finished, drill a small hole through the axis of the thread. This will take all the outward pressure off of the threads. When using small drill bits you need high RPM's. A Dremmel or pneumatic drill would do the job. If it is a blind hole, once you drill all the way through the screw, put some penetrating oil in the hole and on the threads (like Harry said) and let it sit for awhile. For members that don't own an impact screwdriver get a large handled screwdriver, get a good grip on it, and tap it with a hammer while torquing CCW.
Doug Pav

Offline bingster

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Re: Taking out screws on ringer assy that hold coils
« Reply #4 on: May 10, 2011, 08:41:05 PM »
Will sliding the coils off the poles of this ringer result in the kind of demagnetization that the 500 type ringer suffers when its coil is moved off the pole? Or is this a different animal, altogether?
= DARRIN =



Offline djtownsend

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Re: Taking out screws on ringer assy that hold coils
« Reply #5 on: May 11, 2011, 08:44:22 AM »
Thanks for the feedback.  Since I will have to replace the screws, does anyone know where I can get replacement screws?

Offline Wallphone

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Re: Taking out screws on ringer assy that hold coils
« Reply #6 on: May 11, 2011, 09:08:14 AM »
Do you know what size the screws are yet?
Doug Pav

Offline djtownsend

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Re: Taking out screws on ringer assy that hold coils
« Reply #7 on: May 11, 2011, 09:28:37 AM »
Since I can't get them out, I have no idea of what size the screw is.

Offline djtownsend

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Re: Taking out screws on ringer assy that hold coils
« Reply #8 on: May 11, 2011, 09:41:45 AM »
I just one of the screws out and have to bring it to the hardware store to find out the size of the screw.  It is real short so drilling through it would not be as big as a task as I thought it would.

Offline djtownsend

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Re: Taking out screws on ringer assy that hold coils
« Reply #9 on: May 11, 2011, 12:40:32 PM »
If anyone is interested, the screws that hold the coils in place are #8  3/8 inch.

Offline djtownsend

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Re: Taking out screws on ringer assy that hold coils
« Reply #10 on: May 12, 2011, 10:20:54 AM »
Also, if anyone is having trouble removing these screws, I used a 1/8" drill bit on my regular drill.  Worked like a dream and had no problem removing the screw after I drilled the hole in it.

Offline Wallphone

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Re: Taking out screws on ringer assy that hold coils
« Reply #11 on: May 12, 2011, 11:13:47 AM »
Just so you know there are different threads per inch on a #8 screw so you should take one with you to the hardware store. The common sizes are 8-32 & 8-36 but they also made a 8-40. Knowing how the phone company did things they probably used the hard to find size. That's not as bad as some of the old machine manufacturers like Brown & Sharpe that had bearings made to their specifications so if you ever needed a replacement you had to get it from them.
Doug Pav

Offline Dan/Panther

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Re: Taking out screws on ringer assy that hold coils
« Reply #12 on: May 12, 2011, 01:20:38 PM »
I had the same concern as Bingster. Will this effect the magnetism of the coils after it is taken apart ?
D/P

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Offline Dennis Markham

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Re: Taking out screws on ringer assy that hold coils
« Reply #13 on: May 12, 2011, 04:41:55 PM »
Dan & Bingster, I wondered the same thing.  After Jorge did his research on the 500 ringers that may be a concern. 

For those that haven't read the information, here's a link where I posted a link to Jorge's research:

http://www.classicrotaryphones.com/forum/index.php?topic=3375.0

Offline djtownsend

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Re: Taking out screws on ringer assy that hold coils
« Reply #14 on: May 14, 2011, 07:42:46 PM »
Well, I took out the coils from the ringer assembly so that the rest of the assembly can be cleaned.  I left the coils connected and didn't leave them out of the assembly for very long.  I'll let everyone know what happens when I put it all back together.

Dan