We are now offering to resurface mag fields.
You can send yours to us and we can resurface it for you.
Cost is $50 dollars plus shipping.
J and M Machine
40 Mt. Vickery Rd
Southborough,MA
01772
508-460-0733
www.jandm-machine.com
Resurface mag fields
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J and M Machine
Topic author - Posts: 97
- Joined: Wed Jan 09, 2019 6:46 pm
- First Name: John
- Last Name: Gulbankian
- Location: Massachusetts
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Resurface mag fields
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Original Smith
- Posts: 3298
- Joined: Tue Jan 08, 2019 10:43 am
- First Name: Larry
- Last Name: Smith
- * REQUIRED* Type and Year of Model Ts owned: 13 Touring, 13 Roadster, 17 Coupelet, 25 Roadster P/U
- Location: Lomita, California
- MTFCA Number: 121
- MTFCA Life Member: YES
- MTFCI Number: 16310
Re: Resurface mag fields
RV offers that service at an additional cost with his rebuilt field coils.
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Adam
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- Last Name: Doleshal
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- Location: Wisconsin
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- Board Member Since: 2000
Re: Resurface mag fields
Larry, As far as I know, all the TR coils from Minnesota came with that already done too.
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J and M Machine
Topic author - Posts: 97
- Joined: Wed Jan 09, 2019 6:46 pm
- First Name: John
- Last Name: Gulbankian
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Re: Resurface mag fields
Interesting that you both mention that as Lang's didn't have any for this customer and there was a delay in getting them reground.
I am posting this for people so they don't have to wait.
I am posting this for people so they don't have to wait.
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RajoRacer
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- First Name: Steve
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Re: Resurface mag fields
Question John: are you grinding the four mounting locators prior to facing off the poles or visa-versa ?
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Dan B
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- Location: PA
Re: Resurface mag fields
All I can say is this is absolutely necessary if you are planning to set it up with the proper gap. Glad someone else is offering it.
1923 Touring
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J and M Machine
Topic author - Posts: 97
- Joined: Wed Jan 09, 2019 6:46 pm
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- Last Name: Gulbankian
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Re: Resurface mag fields
I'm just machining the mag faces: I check the bolt bosses and make sure there's no burrs on them and then secure it to machine and take enough to get it true. So far I haven't found a Mag plate off on the bolt bosses to cause an issue. They are secured on machine same setup as on engine.
Only issue I can see occurring is if the block bosses get distorted which after 93-100 year old iron is going to move.
Even still this one shown in picture was off over .010" and made it impossible for customer to get right.
We hate to wait to get things done as it holds up everyone . We're providing this service so people don't have to wait.
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RajoRacer
- Posts: 4358
- Joined: Sun Jan 06, 2019 12:18 pm
- First Name: Steve
- Last Name: Tomaso
- * REQUIRED* Type and Year of Model Ts owned: 1914 Touring, 1919 Centerdoor, 1924 TT C-Cab Express, 1925 Racer
- Location: Longbranch, WA
- MTFCA Number: 14972
- MTFCI Number: 15411
- Board Member Since: 2001
Re: Resurface mag fields
Thanks John - I have found more than one casting "tweeked" a bit most likely from rough handling. I check coils on my surface plate, poles down and check for "any daylight" showing beneath any of them before using a depth gauge to check each mounting boss just to verify.
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Mopar_man
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Re: Resurface mag fields
I just got my mag ring back from J&M Machine. As always they did a great job. I was having a heck of I time getting the gap right. You can see my post "Getting Rattles back on the Road". Not only were there some contacts that were high some were high in on one part of the contact and lower on the other. I don't have a lot of experience but my thinking is that you want to get this gap as close to perfect as you can so you don't have issues down the road. So if you have a ring that you are rebuilding yourself or a good ring you just want to true up send it over to J&M. They will make it right.