SVB
Established Member
As the title says really - what do you use and why?
Simon
Simon
Scrapers - negative rake or traditional grind?
- Thread starter SVB
- Start date
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CHJ
Established Member
Both formats but as to why one in preference over another?
For me it's a case of task in hand and what I perceive as best tool presentation, I don't change work method to suit tool, rather select tool to give desired contact when it seems appropriate with particular access requirements.
For me it's a case of task in hand and what I perceive as best tool presentation, I don't change work method to suit tool, rather select tool to give desired contact when it seems appropriate with particular access requirements.
chipmunk
Established Member
Hi Simon,
FWIW I use both but most of mine are conventional scrapers.
For box making, conventional scrapers are more flexible IMHO since they can be used in a neutral rake configuration (flat) or slightly trailing or as shear scrapers. I also use conventionally ground HSS scraper tips on round bars as shear scrapers.
I've even successfully used a round nosed conventional scraper in a bevel rubbing cutting configuration as I thought I saw Bert Marsh doing a few years ago - although I admit that some people I have told this have doubted whether I really saw it(?).
I like my scrapers and tips hollow-ground and use them with the edges touched up and burrs removed with a diamond hone. Hollow grinding allows the hone to bridge the hollow grind to permit easier touching-up of just the edges without having to hone the full bevel.
My only truly negative rake scraper is french-curve-like and is for refining the inside of a bowls. The constant NR helps keep a consistent trailing edge when refining the shape of the inside with the tool flat on the rest.
Jon
FWIW I use both but most of mine are conventional scrapers.
For box making, conventional scrapers are more flexible IMHO since they can be used in a neutral rake configuration (flat) or slightly trailing or as shear scrapers. I also use conventionally ground HSS scraper tips on round bars as shear scrapers.
I've even successfully used a round nosed conventional scraper in a bevel rubbing cutting configuration as I thought I saw Bert Marsh doing a few years ago - although I admit that some people I have told this have doubted whether I really saw it(?).
I like my scrapers and tips hollow-ground and use them with the edges touched up and burrs removed with a diamond hone. Hollow grinding allows the hone to bridge the hollow grind to permit easier touching-up of just the edges without having to hone the full bevel.
My only truly negative rake scraper is french-curve-like and is for refining the inside of a bowls. The constant NR helps keep a consistent trailing edge when refining the shape of the inside with the tool flat on the rest.
Jon
There's a pretty good series of YouTube videos on scrapers. Here's one of them.
http://youtu.be/kdkR1I2Z1A4
http://youtu.be/kdkR1I2Z1A4
