[Stan65]

hurryinhoosier62,

I’m located in Central Illinois. I am a machinist of sorts. Mostly CNC, but I do have an old Monarch Lathe and a Bridgeport knee mill at home. I used to help out a local street rod shop that has since closed. He had a 4 axis CNC mill and a CNC lathe that I wrote a lot of code for. Made a lot of neat parts. I do a lot of design work in AutoCad today, but since losing my access to the CNC machines , I outsource my projects to a local machine shop.

[hurryinhoosier62]

Originally Posted by Stan65

hurryinhoosier62,

I’m located in Central Illinois. I am a machinist of sorts. Mostly CNC, but I do have an old Monarch Lathe and a Bridgeport knee mill at home. I used to help out a local street rod shop that has since closed. He had a 4 axis CNC mill and a CNC lathe that I wrote a lot of code for. Made a lot of neat parts. I do a lot of design work in AutoCad today, but since losing my access to the CNC machines , I outsource my projects to a local machine shop.

Good machines to have. I learned manual machining on a Bridgeport and a Clausing lathe. We used to have an align bore fixture for the Bridgeport we had in our diesel production area. We align bored Triton cylinder heads for +.010 over bearings when cam bores were spun( VERY common problem in the Romeo/Windsor/Triton engine family). I’ll see if I can find one in your area.

[Stan65]

mgarblik,

Thanks for the compliment. My job for the past 30 years has been a trouble shooting and continuous improvement in manufacturing. So I can usually think out of the box.

I’m in for 2 sets even though I don’t need them now. I will put them on my shelf and they may save the day for myself or someone else in the future. I would say it’s possibly the last run they will make based on how long they have been on national back order and the limited interest now.

Hopefully a few others will step up.

Thanks,
Stan

[Shiny]

The pipe plug as an expander was a great idea.

That custom mandrel with the shoulder looks like factory tooling! Nice use of your skills, experience, and cleverness. I don't wish a problem like that on anyone but seems it found the right guy to drop on.

Mike

[PAUL K]

Originally Posted by Shiny

The pipe plug as an expander was a great idea.

That custom mandrel with the shoulder looks like factory tooling! Nice use of your skills, experience, and cleverness. I don't wish a problem like that on anyone but seems it found the right guy to drop on.

Mike

I agree with everything said..... And now I know where to go next time we need a slightly oversized cam bearing

[Stan65]

mgarblik,

It was a bit of a head scratcher. I did not use retaining compound or pin it as the interference fit was the same as a correct bearing one the bearing shell resizing was set.

I assume the same as you as to the one being exactly .005 over the others and perfectly concentric.

I made the mandrel in a few thought out steps.

First drill and tap for pipe plug. Didn’t want to cut slots until the hole was tapped.

Next cut slots, kinda ugly, just did it on my band saw as I don’t have a cutter for my mill. (Will be ordering one in the near future and would have used with my indexing head to make it more exact)

Put back in lathe and marked position for #1 chuck jaw in case I needed to remove it. (I didn’t which ensured concentricity when I reduced the OD)

Turned the OD of the mandrel for a nice slip fit of the bearing while leaving a shoulder for the bearing to seat against.

Not sure it was necessary, but I also reduced the diameter of the mandrel on the chuck side to help with the expansion when the pipe plug was tightened. I used ARP lube on the threads to help eliminate gaulding.

It didn’t take much pressure from the pipe plug to hold it nice.

The dremel wasn’t ridged enough and wanted to chatter on one of the test bearings. I was able to just use a new ceramic cutter insert and it machined really nice.

Long winded reply, but I’m pretty proud of this home fix. I feel like this is as good as original without any “might be ok” worries.

Thanks!
Stan.

I ult




and never removed it from the lathe chuck