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Mr. King explains and demonstrates in the DVD how to hand scrape a 1" x 3" x 12" cast iron bar to 20 points per 1 inch (PPI) and hand 1/2 moon oil flake; he also shows you how to use the Swiss made Biax Scraper imported to the USA by DAPRA. The 2nd part of the video highlights scraping by power to 20 PPI and the last segment explains how to hand and power scrape to 40 PPI. 40 PPI is used in the high precision machines and surface plates. In the DVD he explains the "rotation of points" theory which shows you how to check flatness while scraping, how to use bearing bluing, etc. Most conventional machines an be scraped to 20 PPI.
This video was added to our catalog on January 01, 2000 in Metalworking::Basic Skills.
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Well, quite a treat. I've been learning scraping on my own for a few months now.
This video really shows the process in great detail. I'd say 2/3 is hand, 1/3 power.
The animations really help visualize whats happening.
Also, he explains some of the why's in what you are doing.
Its clearly a tape transfer to DVD, but that's life in the big city.
The content is top notch.
The production values are modest but better than most of the educational garbage out there. There's lots of good information and this video doesn't burn two hours of your time to give you twenty minutes of information. After watching the it, I felt like I could actually do precision scraping if I had enough hands on practice. I was hesitant seeing this. Well worth watching.
Very well done. It is just an intro and does not give enough info to really allow you to do a project. I now know that I want to learn more and hope there will be further DVDs. I just can't afford to take a week long class right now. This may be one of the few subjects that you can't really teach your self. Machine scraping and brain surgery.
This video describes the fundamentals on scraping the surface for machine tools both standard and high accuracy by hand and with power equipment so don't expect to be a machine rebuilder after watching this video. What you will learn is the general technique which with practice will give you the skills to produce the correct bearing surfaces on machine tools that will provide accuracy and longevity of the equipment. Highly recommend this video for anyone considering scraping anything.
The video is basically an advertisement for the power scrapers sold by Dapra tools.
The beginning of the video did have some useful information on sharpening, indicating and setup but the camera angles and camera distance from the actual working surface did not allow the viewer to see any detail of the workings of the scraper blade.
Michael Morgan's basic Hand Scraping is much better
Didn't provide much detail or information. Very basic intro to the topic, seemed mostly like an advertisement for Dapra stuff.
I had no idea what scraping was about this dvd gives you a good idea what happens and what it is for.
I didn't like the DVD at all, it reminded me like someone took a movie while the guy was doing it, and he got paid for it. I didn't watch the 3rd part at all.