Skew on acrylic and other synthetics?

Signed-In Members Don't See This Ad

Woodchipper

Member
Joined
Mar 15, 2017
Messages
3,981
Location
Cleveland, TN
I use a roughing gouge on them but I'm interested in the smoother finish with a skew. Obviously, MM and polishes would follow the skew operation. My skew is a regular flat style, not round. Grind angle needed or recommended?
 
Signed-In Members Don't See This Ad

randyrls

Member
Joined
Feb 2, 2006
Messages
4,650
Location
Harrisburg, PA 17112
John; A contrary view is I use a skew for softer synthetics, but I have a Carbide tool (bottom one) presented below center for harder or chippy synthetics. For the skew make a shearing cut, don't scrap. The bottom carbide bit is what I use for the hardest of the synthetic TruStones and the like. In either case you should get endless ribbons of material off the tool. You should not have shards and have pits in the pen blank,

full
 

Curly

Member
Joined
Nov 20, 2010
Messages
4,566
Location
Saskatoon SK., Canada.
I use my skew with the same grind angles as for wood and even then there is a lot of latitude. Start with what it is and change it if you feel the need.
 

jttheclockman

Member
Joined
Feb 22, 2005
Messages
17,011
Location
NJ, USA.
Since carbides became the big thing I used the round cutter most to get me close and then finish with a skew on all my blanks. Angles are choices not laws. Everyone presents tools differently and can handle angles different. Experiment is best learning tool.
 

Woodchipper

Member
Joined
Mar 15, 2017
Messages
3,981
Location
Cleveland, TN
Thanks for the replies. Need to sharpen the skew first. Practice on some wood as I haven't turned anything in a while.
 

its_virgil

Member
Joined
Jan 1, 2004
Messages
7,753
Location
Wichita Falls, TX, USA.
Skew for me on all materials from beginning to end. Flat, oval, straight angled edge, curved edge (as from Alan Lacer)...I am a skew lover. I keep the same edge and angles as they come. I am especially fond of my 1 1/4 inch Carter and Son skew.
Do a good turn daily!
Don
 

Woodchipper

Member
Joined
Mar 15, 2017
Messages
3,981
Location
Cleveland, TN
Skew for me on all materials from beginning to end. Flat, oval, straight angled edge, curved edge (as from Alan Lacer)...I am a skew lover. I keep the same edge and angles as they come. I am especially fond of my 1 1/4 inch Carter and Son skew.
Do a good turn daily!
Don
So I take it you are skewed in the direction of the skew? Couldn't resist that. ;) I need to practice, then.
 

qquake

Member
Joined
Feb 8, 2004
Messages
4,506
Location
Northern California
I use carbide with a shearing cut now on everything. Wood, acrylic, hybrid, and even inlace acrylester. I'm no longer afraid of turning brittle acrylics.
 

Attachments

  • carbide02.jpg
    carbide02.jpg
    744.4 KB · Views: 43
  • carbide01.jpg
    carbide01.jpg
    1.1 MB · Views: 40
  • carbide02.jpg
    carbide02.jpg
    1.2 MB · Views: 40
  • carbide01.jpg
    carbide01.jpg
    600.1 KB · Views: 41
  • 056.jpg
    056.jpg
    278 KB · Views: 40
  • carbide01.jpg
    carbide01.jpg
    454.2 KB · Views: 41
  • 014.jpg
    014.jpg
    136.8 KB · Views: 39
  • 015.jpg
    015.jpg
    188.3 KB · Views: 40
  • 017b.jpg
    017b.jpg
    137.9 KB · Views: 42

jrista

Member
Joined
Aug 12, 2021
Messages
1,246
Location
Colorado
I use carbide with a shearing cut now on everything. Wood, acrylic, hybrid, and even inlace acrylester. I'm no longer afraid of turning brittle acrylics.
Thanks to Jim's prior recommendations for sheer cutting like this, this is generally my go-to as well. There are times when I'll use a negative rake cutter flat to the blank, as for some things that still gives me a cleaner finish, but sheer cutting is an extremely valuable skill and will work on pretty much any material.
 

Woodchipper

Member
Joined
Mar 15, 2017
Messages
3,981
Location
Cleveland, TN
Lots of good info. Watched a video of a turner who turned from square to round with a skew. I have lots of wood to
for practice so I won't ruin a good blank, wood or synthetic.
 

qquake

Member
Joined
Feb 8, 2004
Messages
4,506
Location
Northern California
Thanks to Jim's prior recommendations for sheer cutting like this, this is generally my go-to as well. There are times when I'll use a negative rake cutter flat to the blank, as for some things that still gives me a cleaner finish, but sheer cutting is an extremely valuable skill and will work on pretty much any material.
I rarely use negative rake cutters, but will on some occasions. The last time was on a piece of very old, very brittle douglas fir from the Goonies house. My son loved the Goonies movie when He was a kid, and I wanted to make him a Goonies pen. My first two tries failed miserably, so for my third and successful attempt I used a negative rake cutter.
 

Attachments

  • 007.jpg
    007.jpg
    280.9 KB · Views: 19
  • 079.jpg
    079.jpg
    293.3 KB · Views: 17
  • 077.jpg
    077.jpg
    159.6 KB · Views: 23
  • negative rake.jpg
    negative rake.jpg
    369.2 KB · Views: 23
  • carbide03.jpg
    carbide03.jpg
    556.2 KB · Views: 22
  • carbide02.jpg
    carbide02.jpg
    712.3 KB · Views: 24
  • 062_oops.jpg
    062_oops.jpg
    155.4 KB · Views: 23
  • 006.jpg
    006.jpg
    421.4 KB · Views: 18
  • 006.jpg
    006.jpg
    360.8 KB · Views: 19
  • 135.jpg
    135.jpg
    256.7 KB · Views: 17
  • 136.jpg
    136.jpg
    206 KB · Views: 19
  • 138.jpg
    138.jpg
    243.9 KB · Views: 20
Top Bottom