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TOPIC: Scraping

Scraping 2 years 5 months ago #55

  • Graham
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In 2012 I saved some links to Nick Muller's scraping videos which were interesting to me at the time. With Lewis's scraping presentations at the last two meetings I've posted them below for anyone interested in more information on scraping. The videos are slow moving but they cover the techniques in detail.

Scraping in a Lathe's Bed:


Hand scraping: Sharpening:


Hand Scraping: Preparing the Plate:


Scraping in a lathe's top slide (with tapered gib):


Scraping in a tapered gib:


Scraping in a dovetail:


The art of flaking (decorative scraping):


Metal scraping: How to read the spotting:


Scraping in a Myford MG12-M Cylindrical Grinder:
Part 1:
Part 2:
Part 3:
Part 4:
Part 5:
Part 6:
Part 7:
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Scraping 2 years 5 months ago #56

  • MattRulla
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At the June club meeting Lewis Sullivan shared a couple hand scrapers he uses, one from an old file and a brazed carbide tip. I am having trouble locating the appropriate size and grade of carbide to make a similar scraping tool. If anyone has the McMaster (et al.) part number, I would be very appreciative.

Matt

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Scraping 2 years 4 months ago #73

  • MattRulla
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MattRulla wrote:
I am having trouble locating the appropriate size and grade of carbide to make a similar scraping tool.

Ok, I found that KBC Tools in Fullerton does have C-2 grade carbide blanks in many different size. For example, part number 1-2442-872 / STB-312D is 1" x .125" x .375" and sells for $6.22 each.

I hear that Enco / MSC also has carbide blanks available, I just can't seem to locate them in their catalog.

I plan on ordering a few different size of both C-2 and C-5 grade to make a few scrapers with the scarf joint as Lewis suggested. I will be scraping both steel and cast iron.


Matt
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Scraping 2 years 4 months ago #74

  • MichaelV
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I'm sure you meant the "butt" joint! This is a public forum too, so let's try to keep "a certain member" potential libel feeling to a minimum.

Or am I the one that is confused and it is indeed a scarf joint?
Last Edit: 2 years 4 months ago by MichaelV.
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Scraping 2 years 4 months ago #75

  • MattRulla
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I didn't get a photo of his scraper, but I thought it was a scarf joint to increase the silver-solder's surface area. I could be wrong...

Matt



EDIT: After speaking with fellow club member Lewis, I stand corrected. The brazed joint is a butt-joint since the carbide is already square on that edge. Anyhow, I hope there're no sore feelings.
Last Edit: 1 year 9 months ago by MattRulla.
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Scraping 2 years 4 months ago #81

  • RonG
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I made my small scrapers with C style brazed lathe tool bits. I drilled a hole in the end opposite the carbide tip and mounted an old Phillips screw driver handle. The other scraper in the photo was made for pull scraping of Turcite.

RonG

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