Re-conditioning side plates ( resurfacing and re hardening)

[To_Slow]

Here is some info, pics on lapping-re surfacing and re hardening-nitrate.

Some shops that offer the lapping and grinding of the surface will miss lead you in saying that after lapping 1.5 thow off the surface of the face there is still hardness to the plate. Not true at all.

If you take a used plate gage check if for hardness prior to resurfacing and gage check it after the plate had been resurfaced 1.5 to 2 thou down you will get different readings. Meaning after lapping or grinding the plate it is very soft. I can actually tell when grinding right at 1 -1.5 thow deep the grinding wheel cuts very easily into the plate. Meaning very soft metal after removal of the material. What that means you will wear the plate very fast.

If you decide to have your plates lapped or resurfaced do the re-nitrating

Before pics, exactly how i received the plates....

The final result




All stock brass oil galley plugs have been replaced with new npt earls plugs 4 total, new freeze plugs and re zinc plated the dip stick tube with the rear coolant pipe..

You can also see on the front plate i do not cut down the front stationary gear pin. My machine is set up to lapp with out having to cut the pin down..

IF you guys are intrested in this service let me know...

[Herblenny]

Who do you get it to nitrate? I'm getting my 20B built this summer... Its been lapped and i would like to get it nitrated.. I think my builder knows someone but just in case..

[To_Slow]

My regular heat treat guy here at the shop does the nitrating for us.

Re-nitrating the plates after lapping or grinding is a must for long term use.

Here are some plates i did for a 3 rotor custo...





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[Garfinkles Motor Works]

I have plates for eight or nine motors that I was going to have redone .I do not have a price from the heat treat shop as of now .I do have a price for the grinder .Both are local so no shipping .What do you charge per surface or per motor .

[To_Slow]

Originally Posted by Garfinkles Motor Works

I have plates for eight or nine motors that I was going to have redone .I do not have a price from the heat treat shop as of now .I do have a price for the grinder .Both are local so no shipping .What do you charge per surface or per motor .

Hello
For a 2 rotor engine. your looking at 480$$ lapped re-nitrated, new freeze plugs and new oil galley plugs.

For more than one engine it will be cheaper for sure.

Call me if you interested 248-250-0967

[Whizbang]

and that 480 would be for all three irons, correct?

[To_Slow]

Originally Posted by Low Impedance

and that 480 would be for all three irons, correct?

Yes all 3 irons 4 sides.

[To_Slow]

Originally Posted by RotaryResurrection

where are you located? I have some renesis irons I would like to save, but am afraid to have them lapped without nitriding, and I have not found anyone to do the nitride replacement.

David, if your local lead works out then I will gladly send the work to you. I know you have had the grinding lined up for a year or 2 now since we last talked about it, but I do not want to grind plates and use them without new hardness applied, as I have seen what happens and the plates are VERY soft and wear VERY quickly.

Hello.
I'm located in Michigan. FedEx is the most reasonable price from your location about 30$ one way .

Let me know.

Thanks

[Whizbang]

ill be contacting you over the winter once i port the irons.

[To_Slow]

Sounds good

[Rogrx7]

This is an excellent price.

[Cp1]

Price and sales aside, what were your rockwell recordings for hardness before and after nitrating out of curiosity?

[To_Slow]

Originally Posted by Cp1

Price and sales aside, what were your rockwell recordings for hardness before and after nitrating out of curiosity?

The next set of plates i do i will get that info.

[To_Slow]

I will be running a special on lapping and nitrating for the the next month do to the slowing economy, the reason my machinist are dropping there pricing on labor charges and it makes it more affordable for us the rotary community.

2 rotor side plates total of 4 sides lapped and nitrated with new freeze plugs and new oil galley plugs you're looking at.
420.00$

On a side note if you wish to have port work done prior to nitrating it can be done for an extra charge of 250.00 for street, large or race port.. Don't let the cheap price fool you in quality, i just don't see the reason to overly charging for some port work that it does not take long to do or difficulty wise ...
The job will come with a rockwell readings before and after the nitrating for hardness reference... and a reminder of the benefits of nitrating after lapping...
Do contact me for more info regarding the process, time frame is 1 week turn around...

Also i can have your stationary gears re hardened free of charge with any lapping/nitrating job.

248-250-0967
Chip

[Herblenny]

Chip,

I was told you should lap after nitrating not lap and nitrate... Can you clearify that for me??

Also, I've heard that the process of nitrile is not completely flat... Hence Rick Engman laps every new irons when he builds race engines. Just wanted to know your thoughts.. I do understand that it does make the surface to wear less.