Directional Bits - Router Forums
 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 02-11-2008, 11:21 AM Thread Starter
 
Join Date: Oct 2007
Posts: 11
 
Default Directional Bits

I noticed there's Upcut and Downcut bits, is this as simple as using from Left to Right and Right to Left or is it more complicated than that?
Ariel is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 02-11-2008, 12:41 PM
Registered User
 
curiousgeorge's Avatar
 
Join Date: Nov 2006
Country: United States
First Name: George
Posts: 3,002
     
Send a message via Skype™ to curiousgeorge
Default

Ariel, it has nothing to do with right or left. It refers to the cutting direction of the bit itself. For instance, in cutting a mortice in solid wood you would probably want an upcut because it cuts in an upward spiral and draws the chips upward out of the hole. On the other hand, if cutting a dado in plywood you might want a downcut because the downward spiral of the bit will be less likely to splinter the plywood layers. There are other uses, but these are just examples. Hope this helps.

George
Fort Worth, Texas
City where the west begins.
curiousgeorge is offline  
post #3 of 9 (permalink) Old 02-11-2008, 04:04 PM Thread Starter
 
Join Date: Oct 2007
Posts: 11
 
Default

Thanks, that helped a lot and it makes more sense.
Ariel is offline  
Sponsored Links
Advertisement
 
post #4 of 9 (permalink) Old 02-11-2008, 05:26 PM
GWH
 
Join Date: Feb 2008
Posts: 8
 
Default

For a clean surface cut you would want a down cut spiral bit. It does not splinter out the surface as the rotation of the bit is in a "downwards" direction. If surface condition is not a concern, you would probably want to choose an upward cutting spiral bit.
GWH is offline  
post #5 of 9 (permalink) Old 02-12-2008, 05:36 PM
Retired Moderator
 
Mike's Avatar
 
Join Date: Nov 2004
Country: United States
First Name: Mike
Posts: 11,921
 
Send a message via Skype™ to Mike
Default

There is also a compression cutter which is for edge cutting on plywood and veneered materials. This type of cutter squeezes towards the center to prevent tear out top or bottom.

Mike
"Living in the D" (this means Detroit!)
"It's fine to disagree with other members as long as you respect their opinions"
Mike is offline  
post #6 of 9 (permalink) Old 03-03-2008, 11:28 PM
 
Join Date: Jan 2008
Posts: 12
 
Default

Yesterday, at Lowes, I saw a left-hand spiral bit and a right-hand bit... how would these correspond to the upcut/downcut bits referred to above?
babzog is offline  
post #7 of 9 (permalink) Old 03-04-2008, 08:13 AM
Registered User
 
Join Date: Feb 2006
Country: United States
First Name: del
Posts: 782
 
Default

If you aren't doing a lot of cutting they will work that's what they are spiral up and spiral down Do your self a good deed and buy Some good one's The one's at the box store's don't last long I use Amana bits I can get them local And they last a long time And are sharp Their are a few more good mfd. out their They cost more But are worth it del

del schisler
port st. lucie, florida
del schisler is offline  
post #8 of 9 (permalink) Old 03-04-2008, 11:47 AM
Registered User
 
curiousgeorge's Avatar
 
Join Date: Nov 2006
Country: United States
First Name: George
Posts: 3,002
     
Send a message via Skype™ to curiousgeorge
Default

babzog, I hope I get this right, but if not someone will correct me. The left hand spiral is the upcut and the right hand the down cut.

George
Fort Worth, Texas
City where the west begins.
curiousgeorge is offline  
post #9 of 9 (permalink) Old 03-04-2008, 11:52 AM
Forum Contributor
 
Join Date: Jan 2006
Country: United States
First Name: Bj
Posts: 23,786
       
Default

It also can be if you are using the router right side up or upside down in the router table..


==========




"It's fine to disagree with other members as long as you respect their opinions"

Marc Sommerfeld Tools ,Videos
http://www.youtube.com/channel/UCT-n...RWaEpMA/videos

Find all threads started by bobj3
http://www.routerforums.com/search.php?searchid=944097


bobj3 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Router Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Basic Router Bits DONALD Router Bits - Types and Usage 18 01-10-2013 07:50 PM
Magnate Router bits kp91 Tool Reviews 2 07-09-2007 04:36 AM
tounge & groove bits kamrx7 General Routing 3 11-21-2006 10:31 AM
Need help deciding on bits. ryan.s General Routing 8 03-25-2005 10:35 PM
another sorry question about router bits reds_21 General Routing 7 12-30-2004 05:31 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

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

 
For the best viewing experience please update your browser to Google Chrome