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Looking for good gauge to measure angle for skew scraper

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Forum topic by kmetzger posted 11-10-2013 03:06 AM 1086 views 0 times favorited 6 replies Add to Favorites Watch
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kmetzger

147 posts in 1283 days


11-10-2013 03:06 AM

I have a Nova Precision Midi chuck and want to be able to form recesses for bowl bottoms. I haven’t been able to find a “skew scraper” anywhere, so I guess I’ll have to grind a 15 degree angle on a square end scraper (not a skew chisel). What I’d like to know is what kind of gauge would be best for measuring my angle?

FORMING RECESS
The jaw dovetail has been designed for use with a standard skew scraper with 15 degree angle. FOR SAFETY REASONS WE STRONGLY ADVISE DO NOT USE ANY OTHER TOOL

http://www.teknatool.com/products/Chucks/Midi/Downloads/Mid_Chuck_Manual_Sheet_Nov07.pdf

-- Kim, Ajijic, Mexico, http://tinyurl.com/7w5fm25


6 replies so far

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BalloonGuy

93 posts in 1388 days


#1 posted 11-10-2013 04:08 AM

Kim, I have a small (1/2”) skew chisel and the edge is ground at (or nearly) a 75 degree angle. I use this to do final forming of the recess for my bowl bottoms. I’ve done about a dozen this last couple of months this way, most with a 1/8” deep recess (the minimum – and I check it with a caliper depth-gauge) for turning on my SuperNova 2 chuck.

You should be able to use a standard protractor to check the angle of your scraper – though before you waste all that steel, give the skew chisel method a try.

-- Tom Peterson, Omaha, NE

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mtenterprises

933 posts in 2158 days


#2 posted 11-10-2013 11:39 AM

Just make a full scale drawing of what you want to grind then grind away testing your tool often
to the pattern you drew. You should get to within a degree or so. Personally with my Nova chuck I just cut a recess in the wood with no tapper. I haven’t had any problems chucking up or the thing flying off. I think that dovetail thing is just a CYA thing for the company.

MIKE

-- See pictures on Flickr - http://www.flickr.com/photos/44216106@N07/ And visit my Facebook page - facebook.com/MTEnterprises

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bondogaposis

4034 posts in 1816 days


#3 posted 11-10-2013 01:23 PM

Take the miter gauge on your table saw and set it to 15°, then cut the end off of a piece off wood and use that to draw a line on the scraper with a sharpie marker. Grind to the line.

-- Bondo Gaposis

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lew

11340 posts in 3220 days


#4 posted 11-10-2013 11:18 PM

Kim,
I have the same chuck.

I took an old file and ground the angle on the side. I had to make a couple of test fittings to make sure the angle matched the chuck. Then, squared the end to the correct length. It has been working fine for me.

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View Wildwood's profile

Wildwood

1886 posts in 1600 days


#5 posted 11-11-2013 02:36 PM

I have a Oneway chuck, and use bowl/spindle gouge, parting tool, or skew to cut recesses. Also, use my forstner bits some times.

Balloon Guy is right on the money, turn your skew on its side using long point of the finish cutting your recess as shown in FORMING RECESS ILLUSTRATION. All you need is some hand & eye coordination.

Many folks that bought these scrapers, let them collect dust vice use them.
http://www.packardwoodworks.com/Merchant2/merchant.mvc?Screen=CTGY&Category_Code=tools-pkrd-dove

Old files too brittle for turning tools without heat treatment which is too far above my abilities, so unless have metal treatment skills forget old files!

-- Bill

View mpax356's profile

mpax356

67 posts in 1957 days


#6 posted 11-12-2013 09:19 PM

This is a good tool for measuring angles on turning tools http://www.amazon.com/General-Tools-Round-Head-Protractor/dp/B00004T7TC/ref=sr_1_4?ie=UTF8&qid=1384291115&sr=8-4&keywords=metal+protractor

You can also find them at Home Depot or Lowes.

-- MPax, Atlanta

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