I'm shaping Beech pieces 20"L x 2"W x 7/8"T with a 3" radius along the 20"
side and getting a 30% attrition due to break-out and tearing. I'm using a
5hp Powermatic with a 3 blade 3" dia. shaper collar having 45 degree hook
angle on 1/4" thick by 1.5" wide lock-edge knife stock. I've tried
climb-feed, opposing-feed, faster and slower table speed. I suspect the
hook-angle is too acute, but before I make new cutters, I want some advise.
What is the worst of what I am doing wrong? The 30% bad is killing me!
Casey
Yes, the knife needs to be a low angle scraping type for hard and fibery
wood. If the angle is too much, the arc of the cut pulls the wood up and
pops it apart. In other words, you don't want the edge of the knife to get
under the grain.
Tom Plamann
www.plamann.com
"*Casey*" <[email protected]> wrote in message
news:fO%[email protected]...
>
> "Tom Gardner" <[email protected]> wrote in message
> news:[email protected]...
> > I'm shaping Beech pieces 20"L x 2"W x 7/8"T with a 3" radius along the
20"
> > side and getting a 30% attrition due to break-out and tearing. I'm
using
> a
> > 5hp Powermatic with a 3 blade 3" dia. shaper collar having 45 degree
hook
> > angle on 1/4" thick by 1.5" wide lock-edge knife stock. I've tried
> > climb-feed, opposing-feed, faster and slower table speed. I suspect the
> > hook-angle is too acute, but before I make new cutters, I want some
> advise.
> > What is the worst of what I am doing wrong? The 30% bad is killing me!
> >
> Maybe several passes would do it? Close-fitted fence inserts (zero
> clearance) ? The blades are well-ground, balanced and set identical?
> BTW, how does one measure the angle on these blades, other than 45*? Does
a
> 15* angle mean as in a scraping chisel (wood turning), or a very low angle
> like in a fine paring chisel? IOW, do we mean angle from flat or from 90?
> Casey
>
>
Hey Tom
Yeah, I am still on my "project". They started the house 20 months ago and
have yet to sheet rock. I am looking at finishing the woodworking part by
next summer. It is very much a dream job for a woodworker. It will have
provided me and my helper with a year and a half of work plus I was able to
design the interior. Basically I am doing whatever I can think up that looks
cool. It's almost embarrassing. I wish I had time to do the cabinets in this
house. I will post pics on 'abpw' when possible.
Take care
Tom Plamann
www.plamann.com
"Tom Watson" <[email protected]> wrote in message
news:[email protected]...
> On 14 Oct 2003 19:17:20 GMT, "Tom Plamann" <[email protected]>
> wrote:
>
> >I make my own tooling and would go 10-15 degrees for wood such as beech.
You
> >will need to reduce your feed rate with the decreased angle.
>
> It's good to see you 'round these here parts, Tom.
>
> Are you still in the midst of that huge project and will you ever be
> able to post pictures of it?
>
> Hope everything is going well out your way.
>
>
> Regards, Tom
> Thomas J. Watson-Cabinetmaker
> Gulph Mills, Pennsylvania
> http://users.snip.net/~tjwatson
On 14 Oct 2003 19:17:20 GMT, "Tom Plamann" <[email protected]>
wrote:
>I make my own tooling and would go 10-15 degrees for wood such as beech. You
>will need to reduce your feed rate with the decreased angle.
It's good to see you 'round these here parts, Tom.
Are you still in the midst of that huge project and will you ever be
able to post pictures of it?
Hope everything is going well out your way.
Regards, Tom
Thomas J. Watson-Cabinetmaker
Gulph Mills, Pennsylvania
http://users.snip.net/~tjwatson
"Tom Gardner" <[email protected]> wrote in message
news:[email protected]...
> I'm shaping Beech pieces 20"L x 2"W x 7/8"T with a 3" radius along the 20"
> side and getting a 30% attrition due to break-out and tearing. I'm using
a
> 5hp Powermatic with a 3 blade 3" dia. shaper collar having 45 degree hook
> angle on 1/4" thick by 1.5" wide lock-edge knife stock. I've tried
> climb-feed, opposing-feed, faster and slower table speed. I suspect the
> hook-angle is too acute, but before I make new cutters, I want some
advise.
> What is the worst of what I am doing wrong? The 30% bad is killing me!
>
>
Tom
I make my own tooling and would go 10-15 degrees for wood such as beech. You
will need to reduce your feed rate with the decreased angle.
Tom Plamann
www.plamann.com
"Tom Gardner" <[email protected]> wrote in message
news:[email protected]...
> I'm shaping Beech pieces 20"L x 2"W x 7/8"T with a 3" radius along the 20"
> side and getting a 30% attrition due to break-out and tearing. I'm using
a
> 5hp Powermatic with a 3 blade 3" dia. shaper collar having 45 degree hook
> angle on 1/4" thick by 1.5" wide lock-edge knife stock. I've tried
> climb-feed, opposing-feed, faster and slower table speed. I suspect the
> hook-angle is too acute, but before I make new cutters, I want some
advise.
> What is the worst of what I am doing wrong? The 30% bad is killing me!
>
Maybe several passes would do it? Close-fitted fence inserts (zero
clearance) ? The blades are well-ground, balanced and set identical?
BTW, how does one measure the angle on these blades, other than 45*? Does a
15* angle mean as in a scraping chisel (wood turning), or a very low angle
like in a fine paring chisel? IOW, do we mean angle from flat or from 90?
Casey