Any engineers out there with 5mins to spare?

[TigaWave]

I'd like to let a couple of people run some figures through a new calculator to see if there are any spurious results and also some user feedback. The calculator runs some fairly involved maths to work out bore closure for a range of bearing wall thicknesses on a new material.

You put in shaft size and carrier size and it should give clearances and closure figures.

Send me a pm or e-mail and I'll send the excel sheet for feedback.

 

[holly1]

I would like to help you out but my calculator is quite old oh yeah and i have not got a clue what your talking about but good luck with it.

 

[mtb]

in the old days
you'd hand scrape bearings in, test with blue to check bearing surface were even
I used to have a complete white metal bearing set with moulds those were the days things were repaired adapted and ajusted to do the job not like fit forget stuff these days which seems to have no real tolerances

you need to give more information

Mick

 

[PuffTheMagicDragon]

Ah! The good old days! Making two centre pops, measuring with a trammel so that when the new white metal cooled - and contracted - we could beat the metal with a ball pein hammer to open out the bearing until the measurement was regained.

Bearing then assembled and bored. After that came the fun with the blue and those wonderful Swedish scrapers that looked like a piece of twisted metal strip with no handles ...

Talking about forty years ago. /forums/images/graemlins/grin.gif

EDIT: I am talking about big ends on ship engines, of course.

 

[FullCircle]

As we say around here, PM sent.

 

[TigaWave]

Oi! no real tolerances!!
we work to 0.01mm on bearings, cutless or rudder..
The calculator (hopefully) gives accurate output of bore closure on a range of wall thicknesses from 2.00mm to over 100.00mm.

The thickness of material effects its behaviour and it is not very linear, hence a simple calculator really helps.