Woodworking (rec.woodworking) Discussion forum covering all aspects of working with wood. All levels of expertise are encouraged to particiapte.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Ron Truitt
 
Posts: n/a
Default RAS tear out question

I'm using an old Craftsman radial arm to crosscut cabinet plywood pieces
to length and seem to have a problem with surface tear out.

The tear out is only on the left side of the blade(a combo carbide blade
still in good shape). I get a clean cut on the right side.

Any ideas why this might be occurring, and only on the left side?

Thanks,

RonT

  #2   Report Post  
 
Posts: n/a
Default

you need a better blade and one with more teeth....I suggest a Freud
with 80 teeth and the hook set for use with a radial arm saw
Mike

  #3   Report Post  
 
Posts: n/a
Default

you need a better blade and one with more teeth....I suggest a Freud
with 80 or more teeth and the hook set for use with a radial arm saw
Mike

  #4   Report Post  
John
 
Posts: n/a
Default

If it's happening only on one side, and the blade doesn't appear to
have any obvious problems, it's likely that the blade isn't aligned
perfectly with the arm. If the front of the blade is slightly to the
right, and the back to the left, the teeth will rub against the work on
the left side as they are rotating up out of the cut.

John Martin

  #5   Report Post  
woodworker88
 
Posts: n/a
Default

Mike is right. Although I'm not sure if you need a Freud (the're about
80 bucks), crosscutting plywood demands a dedicated plywood blade.
They are simply normal blades with about 80-100 teeth. The will
prevent tearout in general, and produce a smoother cut through the
varying plys of the plywood.



  #6   Report Post  
George
 
Posts: n/a
Default


"Ron Truitt" wrote in message
...
I'm using an old Craftsman radial arm to crosscut cabinet plywood pieces
to length and seem to have a problem with surface tear out.

The tear out is only on the left side of the blade(a combo carbide blade
still in good shape). I get a clean cut on the right side.

Any ideas why this might be occurring, and only on the left side?


Blade has some "heel" in it. Means it's not parallel to the line of travel,
the equivalent of blade not parallel to miter groove in tablesaws. You need
to touch the adjustment a bit nose right so the teeth won't pick up the
splinters. I like the splinter method of adjustment - it's the most
sensitive available.

Note: as you check for heel, pull a bit to either side and see if the arm's
out of adjustment. Loose arm and heavy hand can do it, too.

Oh yes, doesn't matter how many teeth you have in the blade if you slow the
feed rate. Use your blade if you care, until you can get one with the
negative rake popular for RASs.


  #7   Report Post  
 
Posts: n/a
Default

I also agree that the blade is not square to what you are cutting. If
you can not get the blade or the arm square then draw out the distance
of the cut you are cutting. Then on the bad side go along the line
with a utility knife before you cut. This will keep the tear-out to a
minimum.

  #8   Report Post  
J. Clarke
 
Posts: n/a
Default

Ron Truitt wrote:

I'm using an old Craftsman radial arm to crosscut cabinet plywood pieces
to length and seem to have a problem with surface tear out.

The tear out is only on the left side of the blade(a combo carbide blade
still in good shape). I get a clean cut on the right side.

Any ideas why this might be occurring, and only on the left side?


Since nobody else has mentioned thise, get a copy of Jon Eakes radial saw
book and do what it says
http://www.wired-2-shop.com/joneakes/ProductDetail.asp?ProdID=3&nPrdImageID=&CatID=3.
While you're about it you might want to pick up a copy of the Mr. Sawdust
book as well http://www.mrsawdust.com/.


--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)
  #9   Report Post  
Leon
 
Posts: n/a
Default


"Ron Truitt" wrote in message
...
I'm using an old Craftsman radial arm to crosscut cabinet plywood pieces
to length and seem to have a problem with surface tear out.

The tear out is only on the left side of the blade(a combo carbide blade
still in good shape). I get a clean cut on the right side.

Any ideas why this might be occurring, and only on the left side?

Thanks,

RonT


The blade does not spin parallel to the path it travels.


  #10   Report Post  
Rumpty
 
Posts: n/a
Default

The blade does not spin parallel to the path it travels.

In other words it's out of alignment. The heel/toe needs to be adjusted.
The Jon Eakes book has complete alignment instructions for the craftsman
RAS. It can be downloaded in PDF format for around $15.00 CDN.

--

Rumpty

Radial Arm Saw Forum: http://forums.delphiforums.com/woodbutcher/start

- - - - - - - - - - - - - - - - - - - - -


"Leon" wrote in message
.. .

"Ron Truitt" wrote in message
...
I'm using an old Craftsman radial arm to crosscut cabinet plywood pieces
to length and seem to have a problem with surface tear out.

The tear out is only on the left side of the blade(a combo carbide blade
still in good shape). I get a clean cut on the right side.

Any ideas why this might be occurring, and only on the left side?

Thanks,

RonT


The blade does not spin parallel to the path it travels.




Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
To anyone sick of alt.hvac Matt Morgan Home Repair 87 April 8th 05 05:17 PM
OT Guns more Guns Cliff Metalworking 519 December 12th 04 05:52 AM
1st time jointing cherry--getting tear out Ian Dodd Woodworking 11 October 27th 04 06:58 PM
Plumbing Question Jeff UK diy 4 December 1st 03 01:49 PM
Question????? Sir Edgar Woodworking 8 July 20th 03 05:22 PM


All times are GMT +1. The time now is 11:42 AM.

Powered by vBulletin® Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.
Copyright 2004-2023 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"