Hello all,

By the size of the box that came to my wife yesterday, I anticipate a  HSS negative rake scraper for my bowls.  I am presently working on a spalted maple, crotchwood piece that shows a lot of promise,  yet has been giving me some grief along the way.  I'm having some good experience with PC Petrifier to stabilize the soft wood without sealing it so much that an oil finish will not penetrate.  

 

Anyway, two questions:

.   Should a negative rake scraper have a burr?

.  A poor man might ask why one couldn't simply take a regular scraper and tilt it down toward the bowl. What's the difference?  

 

Thanks, as always.

 

Robert

Some say yes and some say no. Also two schools on the burr. One says burr off the grinder is good . And there are two ways to get that burr, Clewes says best if scraper is held upside down, while others say right side up.

 

Now the second school says hone the grinder burr off and then use a burnishing rod to raise a new burr which will last longer.

 

No matter what method you use the burr only lasts a very short time. So how to decide is try it yourself and then use what you think is best. An advantage to negative rake is that it works best with the handle held level

 

By the way it makes you wonder why they do not just give you the gift when it comes in since turning tools are very difficult to disguise.

11 minutes ago, Gerald said:

Some say yes and some say no. Also two schools on the burr. One says burr off the grinder is good . And there are two ways to get that burr, Clewes says best if scraper is held upside down, while others say right side up.

 

Now the second school says hone the grinder burr off and then use a burnishing rod to raise a new burr which will last longer.

 

No matter what method you use the burr only lasts a very short time. So how to decide is try it yourself and then use what you think is best. An advantage to negative rake is that it works best with the handle held level

 

By the way it makes you wonder why they do not just give you the gift when it comes in since turning tools are very difficult to disguise.

 

 

I dunno. We have people here that would pack it in a Victoria Secrets box and St Patrick's day wrapping paper. Once inside the box itself would be held closed with a roll of camo duck tape.

Edited December 17, 20205 yr by Gunny

Not many gifts the weight of a woodturning tool tho. And that is hard to disguise.

Well, on my regular scraper, I have moved to a  burnishing rod  to make the burr, so I know how  to do that.   

Guess I'll have  to try with or without on the negative rake scraper. 

 

I like Gunny's wrapping style. I have to come up with something new this year to replace the Sunday funnies. 

3 minutes ago, Bob Hodge said:

 

I like Gunny's wrapping style. I have to come up with something new this year to replace the Sunday funnies. 

Do you mean they still print those. I get mine online.

45 minutes ago, Gunny said:

We have people here that would pack it in a Victoria Secrets box and St Patrick's day wrapping paper. Once inside the box itself would be held closed with a roll of camo duck tape.

Looking in the mirror again, Gunny?

I agree with Gerald. When I use one I generally just grind a burr on it and then very lightly hone it on a piece of wet/dry sand paper, usually 1000 grit, on a flat surface to knock off some of the burr. The trouble with a heavy burr is that it is hard to control the cutting depth and for me they have caused catches in the past. I have had better luck using a large round nose scew chisel that i have ground to a curve but not a half round.

Paul

Here is a photo of the grind I use. 
Paul

9 hours ago, Bob Hodge said:

A poor man might ask why one couldn't simply take a regular scraper and tilt it down toward the bowl. What's the difference?

 

No difference cutting wise.  Holding a regular scraper handle up high enough for negative raking can be challenging.  So why not grind a negative rake into your regular scraper?

5 minutes ago, HandyDan said:

So why not grind a negative rake into your regular scraper?

 

 

Not sure about you guys but I prefer to think Positive.    I'm just saying,.,.,

Edited December 18, 20205 yr by Gunny

Just now, Gunny said:

 

 

Not sure about you guys but I prefer to think POSTIVELY.    I'm just saying,.,.,

 

Then POSITIVELY you should look into negative rake scrapers.  Positive rake scrapers are CATCHY so they will never catch on.

seems to work okay.

 

Thanks, guys, for the advice on my anticipated  negative rake scraper. I will positively try several options,

including new thoughts for wrapping presents.    

The two main differences in neg rake and regular are that the neg rake does not create catches near as easily as a regular scraper can. And the regular scrapers can remove material much faster .

 

Negative rake is what I would call a finishing scraper.

 

Yes you can grind a regular scraper to a negative rake.