S5 Oversized Stat Gear Bearings?

[RETed]

Originally Posted by JustJeff

The parts guy did not provide many any hyphens between the numbers so I'm typing them identical to what he gave me.
Standard
082010502B

Oversized
N35010E02 (though I can't read his writing and it might be N350010EO2)

I found that I need standard through surfing Mazdatrix website. Their part numbers are partially reversed but identical other than that.

Mazdatrix
10-502B-0820

I used to know this by heart, but memory fails me...

All Mazda parts are grouped by:

XXXX - YY - ZZZZ

So "082010502B" is "0820-10-502B".
YY = location of part, which, in this case, 10 = engine
"0820" is year / model designation? Since it's 4 numeric, this means application over several years / models?
"502B" is the sub part # under "10" = engine.
The "B" at the engine is a revision letter, which just means it supercedes an "A" part.

So "N35010E02" is "N350-10-E02".
"N350" is 1989 - 1992 RX-7.
"10" = engine
"E02" = sub part # under "10" = engine.

Mazdatrix just rearranges the Mazda PN's for easier sorting...
"10-502B-0820" is...
"10" = engine
"502B" = sub part # under "10" = engine
"0820" = year / model designation

We got a Mazda parts tech in the house?
j9df3s still around?


-Ted

[JustJeff]

Originally Posted by RETed

FC stat gears bearings only come in two sizes from Mazda - standard and oversized.
Oversized is for those who have a "clearanced" eccentric shaft due to machining in case of warpage / damage.
Unless you have the tools to "mic" the eccentric shaft - v-blocks, run-out gauge, calipers, etc. - just get the standard bearings.
Most people should just get the standard bearing.

Mazda went one step further with the FD stat gear bearings - that's why there are several (+ and -) to account for variations in production tolerances and for slight clearancing machining.
(I think it's something like one or two undersized, one standard, and the rest are oversized.)
I guess they thought clearances on the stat gears was that much more critical on the 13B-REW engines...


-Ted

I figured I'd need standard, I was just curious what oversized was and your answer is about what I expected. Thanks for the confirmation.

Originally Posted by RETed

We got a Mazda parts tech in the house?
j9df3s still around?


-Ted

I was actually expecting j9df3s to be the first to answer

[j9fd3s]

Originally Posted by RETed

I used to know this by heart, but memory fails me...

All Mazda parts are grouped by:

XXXX - YY - ZZZZ

So "082010502B" is "0820-10-502B".
YY = location of part, which, in this case, 10 = engine
"0820" is year / model designation? Since it's 4 numeric, this means application over several years / models?
"502B" is the sub part # under "10" = engine.
The "B" at the engine is a revision letter, which just means it supercedes an "A" part.

So "N35010E02" is "N350-10-E02".
"N350" is 1989 - 1992 RX-7.
"10" = engine
"E02" = sub part # under "10" = engine.

Mazdatrix just rearranges the Mazda PN's for easier sorting...
"10-502B-0820" is...
"10" = engine
"502B" = sub part # under "10" = engine
"0820" = year / model designation

We got a Mazda parts tech in the house?
j9df3s still around?


-Ted

hehe, would you believe i was in sweden?

that explanation is exactly right. just to add the application part of the part number, is the car it was originally engineered for, so 0820 is the R100 10A engine. N350 is the non turbo 89 rx7, etc etc. its not a hard and fast rule, there are exceptions.

10 is the engine block, 13 is intake exhaust, 15 is the cooling system etc etc.

the next 3 tell you what part it is, and in theory 15-200 is always a radiator, 13-111 is always an intake manifold gasket, but again, they change things here and there.

the supercession code is pretty meaningless to the consumer. sometimes the part is clearly different between A and B, sometimes it can be a price change. i have also seen revisions change the application part of the part number, the good example of this are the FD front iron housings. they start with an N3A1-10-whatever, and go to N3F1 and N3G1 as they get updated...

oh and an R or R-01 means its a remanufactured part

we got to tour the volvo factory, and you guys should see the press dies for the body parts, they are like small trucks! it takes something like 4 hours to switch dies in the press....