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Scraper

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Scraper

Postby Woodbloke » 05 Jul 2020, 13:15

On the latest project in the 'shop, which is nearing completion, the last remaining thing(s) I have to make is a set of identical (hopefully :eusa-whistle: ) pulls for a small door and a couple of drawers. The design I had in mind needed to have a small 10mm dia 'collar' at the bottom to cover over a goof in drilling the hole in the door (filled with a bit of 6mm dowel then and re-drilled correctly)

I was chundering to myself last night and scratching my head about how to make a 'cove' shaped finger pull in the handles which would be identical on all three pulls. A bespoke scraper would be the ideal way but what to use? High speed or tool steel would be just the jobbie so I fruitlessly hunted high and low last night trying find anything suitable, until this morning I opened a drawer in the 'shop and came across a few of these:

IMG_4684.jpg
(304.46 KiB)


These flat bits are as cheap as the proverbial chips and made from tool steel. Perfick!

I used the disc sander to grind one to the necessary profile, making sure that the dx system was 'off' and I was wearing the required PPE. After about ten minutes, I ended up with this:

IMG_4686.jpg
(239.5 KiB)


I had a spare ash handle made some time ago, so it was easy to just tap in the scraper thus:

IMG_4685.jpg
(230.67 KiB)


Also shown is one of the lumps of English Boxwood I bought from WH last week, from which the pulls will be turned. I already had a small offcut of London Plane in the lathe between centres which I turned to to 12mm dia last night, so this morning I very gingerly marked out the first prototype handle and used the new scraper; I even used it to scrape a shallow concave depression in the face:

IMG_4687.jpg
(210.07 KiB)


This is the first prototype without sanding inserted into the small door:

IMG_4690.jpg
(198.33 KiB)


I have in the past made a scraper from a HSS drill but it wasn't particularly good, but using gash flat bits seems to me to be ideal, provided what's being scraped is fairly 'small scale' - Rob
Last edited by Woodbloke on 05 Jul 2020, 17:53, edited 1 time in total.
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Re: Scraper

Postby Malc2098 » 05 Jul 2020, 13:33

Nice job
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Re: Scraper

Postby Mike G » 05 Jul 2020, 13:43

Are you sure they're made from tool steel? I ask, because they are easily sharpenable with a file, and actually quite easily bent. I always assumed they were mild steel.
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Re: Scraper

Postby Woodbloke » 05 Jul 2020, 14:52

Mike G wrote:Are you sure they're made from tool steel? I ask, because they are easily sharpenable with a file, and actually quite easily bent. I always assumed they were mild steel.

They may be Mike, not sure, but the one I was grinding was certainly tool steel. The other ones I've got in my oddments drawer are pretty old so possibly made from better 'stuff' than today's current offerings - Rob
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Re: Scraper

Postby 9fingers » 05 Jul 2020, 14:58

I don't think ordinary mild steel would be fit for purpose. I suspect the no-name ones will be a medium carbon steel possibly with minimal heat treatment is any. Branded ones, Ridgeway, Footprint etc will have had more treatment.

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Re: Scraper

Postby DaveL » 05 Jul 2020, 16:58

For a scraper I don't think being tool steel is that important. The cutting edge is fully supported, unlike that of gouge which has a sharp edge that is subjected to forces that will make it crumble or fold.
Nice bit of re-use for the old flat bit.
I like the pull, nice profile, sanding the dimple might be a problem!
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Re: Scraper

Postby Woodbloke » 05 Jul 2020, 17:51

DaveL wrote:Nice bit of re-use for the old flat bit.
I like the pull, nice profile, sanding the dimple might be a problem!


I simply can't believe how good Boxwood is to work with; it makes Yew seem like the cheapest shed pine. Even 400g paper leaves a discernible scratch pattern! Here's the first two which are more or less identical:

IMG_4691.jpg
(287.36 KiB)


These are 12mm dia x 12mm in length, not inc the 6mm spigot. They were sanded with 9 micron :shock: finishing paper from WH, given a coat of white sanding sealer and then finished with Hampshire Sheen on the lathe. One more to go this evening.

Dimples are no problem Dave when you have a Kirjes sanding system with the tiny rubber pneumatic ball thingie :D - Rob
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Re: Scraper

Postby Phil » 10 Jul 2020, 18:49

Thats very neat Rob.

Good idea for the spade bit. I have a whole range of them in a drawer in the garage.

They were the 'things' to use in the olden days before fortsner.
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Re: Scraper

Postby Woodster » 10 Jul 2020, 23:13

Seems like the perfect job for a round carbide insert. Very easy to make a tool using inserts from Glen Teagle, all you need is a decent wood turner to make a handle! :lol:

https://www.ukwoodcraftandcarbidechisel ... tters.html
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