Rebuilding the Bridgeport: Figuring out the Scraping Pattern

Рет қаралды 4,769

Күн бұрын

I'm starting the hand scraping and flaking part of the Restoration and Rebuilding of a nice Bridgeport Mill. This mill has chromed ways and the column has very little wear. In order to save the chrome way I have elected to just freshen up the flaking on the column and in this video I start to figure out how they make the flaking pattern and duplicate it!

Пікірлер: 37

@ScottHamilton-ys2cm Жыл бұрын

Steve, I enjoy your videos, but this one I have a bit of a problem with. I have scraped professionally for 40 years, and have been teaching Machine Tool Alignment and Fit over the last 10. While power scraping is more efficient, it lends itself to developing bad habits, such as when you race the stroke at the end. Hand scraping demands patience. Hand scraping, particularly flaking, makes the cutting action more evident. It's not my desire to be critical, but I've been seeing a trend of scraping training lately, that seems to be focused on the appearance of scraped surface, rather than the purpose. I teach scraping for free also, but when a student takes my course, they are given a spirit level, they calibrate it, then I take the level to a belt sander and I quickly hit the precision surface while applying pressure to one corner of the level. Their task is to make the level true again, with a minimum of 16 points of contact... without any calibration adjustments. In scraping, making a surface flat is an elementary task, but with machine tools, it requires a geometric relationship to another surface(s), that is the goal in precision scraping.

@Sparky6547 Жыл бұрын

where do you teach these courses?

@jamison7762 11 ай бұрын

*Promosm*

@jackpledger8118 Жыл бұрын

Would think that someone who worked at Bridgeport in the past would come online and give some details of how it was done at the factory yeats ago. Would be an interesting discussion. Anyone out there?

@samrodian919 Жыл бұрын

I really think the change in radius of the tool is the answer Steve, but I think you went about it rather haphazardly. You need to do a smaller area at a time and notate the settings on the tool so you can replicate it again. Once you choose a pattern that you want for the Bridgeport, you can dial those settings in and go for it for real. Looking forward to seeing you do it sir! Cheers from the UK ps I hope you had a nice dinner!

@10swatkins Жыл бұрын

Some of us still have enough brain power to remember all the things that were tried without having to write them down... Heck even Don can do it :) Nothing Haphazard at all....

@TrPrecisionMachining Жыл бұрын

very good job steve

@jagboy69 8 ай бұрын

This is not a skill learned overnight. Might wanna try scraping in a small camel back for starters. Maybe even look for a class. Wish I had the spare time to take one, looks pretty cool.

@10swatkins 8 ай бұрын

Lets see. There have been 7 scraping classes held at my shop over the years... Richard King was the teacher... I have planed hundreds of straight edges and even scraped 7 of them hanging on my wall :)

@jagboy69 8 ай бұрын

Well, reading the other comments here and what my inexperienced eyes saw, I would have never guessed that. Maybe Richard can come back for a refresher course?

@rickdenney5772 Жыл бұрын

Could the Bridgeport flaking be thinner because the high spots are worn down a bit?

@10swatkins Жыл бұрын

don't think so, they are still pretty defined

@TheUncleRuckus Жыл бұрын

You'll get it dialed in Steve, I have faith in ya even if Don doesn't. 😂👍👍

@graedonmunro1793 Жыл бұрын

very patient!!

@paulcooper2897 Жыл бұрын

Thanks for sharing 🇨🇦

@10swatkins Жыл бұрын

My pleasure

@kennyrmurray Жыл бұрын

That’s sweet you went all out when you got into scraping. Maybe this winter I’ll do my Bridgeport but I have to get a beveled straight edge first

@kennyrmurray Жыл бұрын

And out of all the videos I watched you’re the first one to show there are two styles of biax and show all the different scrapers. Thank you!

@kennyrmurray Жыл бұрын

I hope you are doing the saddle too because that’s where my wear is

@10swatkins Жыл бұрын

The part of the saddle when it rides on the knee if very good... I will be doing the connection between the saddle and the table...

@kennyrmurray 11 ай бұрын

@@10swatkins ya know sometimes I forget to check my notifications, sorry. Yes I’m looking forward to that!

@kennyrmurray 11 ай бұрын

The only axis on mine that I don’t have to do because I think it’s perfect is x

@tilliesinabottle Жыл бұрын

The long-awaited scraping video! Once you get the rust shook off you'll be in fine shape to scrape in the camelback, the rails and all the rest. I just started learning and I'm sure I'll get to learn a thing or two from your videos.

@10swatkins Жыл бұрын

I will will try.... Not many people watch these videos and I always loose subscribers :(