Is way scraping information useful/interesting to you?

[rolfinator2002]

I'm toying with the idea of documenting (film and photo) the way reconditioning of a bridgeport mill clone and wanted to know if there was interest on the matter.

[mactec54]

rolfinator2002

That would be a really good subject to post on, A dying art of hand scraping, that needs losts of support
to keep it going

[MBG]

I would LOVE to see.

[diyengineer]

As a noob i have no clue what way scraping is, but would love to learn! haha

[ImanCarrot]

I know it's a dying art but nothing else about scraping- would love to learn!

I also have an old Bridgeport clone that needs resoring so would be very interested from that point too.

Good subject!

[mikemck]

Definitely! Would like to see as I'm trying to learn

[MBG]

So, it looks like the votes are in. When can we start learning?

[ImanCarrot]

I was wondering why folk actualy scrape things flat... why not use a Lapmaster to lap it flat, check it with an interferometer or an optical test plate under monochromatic light- you could get it flat to 1/20th of a wavelength of light.

The only thing wrong with this I can see is that you wouldn't have the tiny grooves, presumeably to allow oil to flow between the surfaces... but surely you could then Jewel the surface like you get on some rifle bolt actions?

Wouldn't this be more accurate and less time consuming (ie: cheaper)?

Or am I totaly off base?

I'd still like to learn it though: simply because I don't know how to do it.

[ThomD]

I'd be interested, in such info. I got a lot of scraping gear by good luck. I also need to fix a knee mill which is pretty good but tight on the in out axis. So it needs reconditioning in the Y axis.

[rolfinator2002]

Lapping probably takes more time and usually reserved for harder surfaces/materials. Grinding is a good alternative IF the shop has a grinder large enough and accurate enough to perform the job, then one of the mating surfaces are flaked or frosted and spotted for heat checks or hard spots. A power scraper lets the mechanic recondition ways/slides of larger machines in situ.

[ImanCarrot]

A power scraper lets the mechanic recondition ways/slides of larger machines in situ

Good point, didn't think of that- the hassle of taking everything apart, lapping them, reassembling them and trying to figure out where the spare bits left over go whilst slipping on ball bearings would make scraping in situ a most attractive option

Gonna get a power scraper and mess about on some spare stock. Will post piccies (if it works lol).

[the4thseal]

yes yes yes. this would be great.