Woodturner's Resource
Woodturner's Resource  
  • Featured Artist    • Websites   Support Wr
Tutorials, Projects & Tips   • Event Calendar   • Tool and Book Store
  Home Page Forum HelpSearch Map TPT Resources LoginRegister
 
Page Index Toggle Pages: 1
Send Topic Print
Is it possible to sand away tear out? (Read 846 times)
 
Daniel Hayes
Active Member
***
Offline


WR Rocks!

Posts: 170

Conroe, Texas, USA
Conroe
Texas
USA

Gender: male

Laguna Revo 1836
Is it possible to sand away tear out?
Jan 31st, 2018 at 5:34pm
 
I use the Sorby turn master system so I basically scrape. On some woods I can get a pretty good finish by angling the carbide tip and shear cutting but on the kiln dried sycamore bowl I recently completed I just could not get rid of the tear out on the inside of the bowl.  Starting with 80 grit there were still some areas that just would not go away.
So can you sand or do you have to cut?
Back to top
  
 
IP Logged
 
Register To Remove Ads
George Hurlburt
WR Champion
*****
Offline


WR Rocks!

Posts: 140

El Dorado, KS, Kansas, USA
El Dorado, KS
Kansas
USA

Gender: male

Robust, Vicmarc 175 and Nova DVR
Re: Is it possible to sand away tear out?
Reply #1 - Jan 31st, 2018 at 6:16pm
 
Try a mix 50-50 of sanding sealer and turpentine. You can also make the fibers stand up with lacquer, or even Johnson's paste wax. You need to cut.
Back to top
  
George Hurlburt  
IP Logged
 
Ed Weber
WR Administrator
WR Patron
*****
Offline



Posts: 8,940

Wilton, California, USA
Wilton
California
USA

Gender: male

JET 1642
Grizzly G0584
Re: Is it possible to sand away tear out?
Reply #2 - Jan 31st, 2018 at 7:19pm
 
Wood being a natural product, no two pieces are ever the same.
In most cases you can artificially stiffen the fibers to resolve the problem as George described. Sometimes the wood simply will not allow this to happen and there is no amount of sanding or cutting that can save it.
A photo might be helpful
Back to top
  
 
IP Logged
 
Daniel Hayes
Active Member
***
Offline


WR Rocks!

Posts: 170

Conroe, Texas, USA
Conroe
Texas
USA

Gender: male

Laguna Revo 1836
Re: Is it possible to sand away tear out?
Reply #3 - Jan 31st, 2018 at 7:26pm
 
George, do you mean wet sand with that mix?  Also as far as the "need to cut" thing, I'm working on it since I just made my first few (4) pens/pencils and only used traditional tools. I was able to get a great finish with my bowl and detail gouges.  On the pens, I never came close to getting a catch.  If I have a bowl on the lathe and I pick up the bowl gouge, I get a catch.  But I am still confused since so many videos show people "cleaning up" with a round nosed scraper. I used a scraper on this bowl but it did not remove the tear out.
Back to top
  
 
IP Logged
 
George Hurlburt
WR Champion
*****
Offline


WR Rocks!

Posts: 140

El Dorado, KS, Kansas, USA
El Dorado, KS
Kansas
USA

Gender: male

Robust, Vicmarc 175 and Nova DVR
Re: Is it possible to sand away tear out?
Reply #4 - Jan 31st, 2018 at 9:59pm
 
Make a fresh edge on your scraper, you will be making a cut with the moisture of the mix, or the lacquer or wax I suggested. Mount some scraps, on a face plate and do the treatment I suggested to test, wear goggles. You can use a gouge just as well. It works on punky wood also. Not meant to wet sand. When cutting with gouges, the handles are in the down position. Scrapers are for finish cuts before sanding. Wetting with finish helps cutting cross grain, when you do so. Don't get carried away with this, you can do too much.
Back to top
  
George Hurlburt  
IP Logged
 
Ed Weber
WR Administrator
WR Patron
*****
Offline



Posts: 8,940

Wilton, California, USA
Wilton
California
USA

Gender: male

JET 1642
Grizzly G0584
Re: Is it possible to sand away tear out?
Reply #5 - Feb 1st, 2018 at 10:02am
 
Daniel, I was "assuming" incorrectly about what Robert was suggesting.
The method I am proposing is this.
Clean out the affected area thoroughly with a solvent like mineral spirits or acetone and compressed air.
Using the same product as you final finish (poly, shellac, Lacquer, etc) apply to the affected area and let cure completely dry.
What this does,
The finish is absorbed into the weak fibers and then hardens, stiffening them to where the can be cut without breaking.
I do not recommend using scrapers on this area since this is an unsupported cut and has a tendency to pull weak fibers out rather than slice them off.
I would use a freshly sharpened gouge (where the bevel is supporting the cut fibers) for the final cut/s.
Back to top
  
 
IP Logged
 
Daniel Hayes
Active Member
***
Offline


WR Rocks!

Posts: 170

Conroe, Texas, USA
Conroe
Texas
USA

Gender: male

Laguna Revo 1836
Re: Is it possible to sand away tear out?
Reply #6 - Feb 1st, 2018 at 2:34pm
 
I'll have to work on this on a different project since this particular bowl is undercut with a hollowing tool and there is no way that I could, at my current skill level, use a bowl gouge in the overhang area.  I did re-do the bowl inside using a shear scraping motion (turning the tool 45 degrees) and that seemed to be better. I raised the grain with water last night and am going out now to see what I can do with it.
Back to top
  
 
IP Logged
 
George Hurlburt
WR Champion
*****
Offline


WR Rocks!

Posts: 140

El Dorado, KS, Kansas, USA
El Dorado, KS
Kansas
USA

Gender: male

Robust, Vicmarc 175 and Nova DVR
Re: Is it possible to sand away tear out?
Reply #7 - Feb 1st, 2018 at 6:53pm
 
Daniel you will get that it takes experience of doing many bowls and working with different tools, techniques and wood. Ed has described much of this.
Back to top
  
George Hurlburt  
IP Logged
 
Register To Remove Ads
Ed Weber
WR Administrator
WR Patron
*****
Offline



Posts: 8,940

Wilton, California, USA
Wilton
California
USA

Gender: male

JET 1642
Grizzly G0584
Re: Is it possible to sand away tear out?
Reply #8 - Feb 1st, 2018 at 7:18pm
 
More than one way to skin a cat
if you're into that sort of thing Roll Eyes
Back to top
  
 
IP Logged
 
Daniel Hayes
Active Member
***
Offline


WR Rocks!

Posts: 170

Conroe, Texas, USA
Conroe
Texas
USA

Gender: male

Laguna Revo 1836
Re: Is it possible to sand away tear out?
Reply #9 - Feb 1st, 2018 at 10:24pm
 
It came out OK.  The end grain is still a little darker but no real visible tear out. I am going to talk to the guys at our local club and see about getting some hands on lessons.  One reason I shy away from the gouge is that I tried to sharpen it and did not do a good job. I don't trust the angle.  Another lesson from the club needed.
Back to top
  
 
IP Logged
 
Ed Weber
WR Administrator
WR Patron
*****
Offline



Posts: 8,940

Wilton, California, USA
Wilton
California
USA

Gender: male

JET 1642
Grizzly G0584
Re: Is it possible to sand away tear out?
Reply #10 - Feb 1st, 2018 at 11:56pm
 
Under the rim is a difficult area to get to without using a scraper of some kind.
Sometimes you can get better access to that area by turning in reverse.
You do need a lathe that has reverse of course
Back to top
  
 
IP Logged
 
Page Index Toggle Pages: 1
Send Topic Print