Pattern/Trim Router Bits - Router Forums
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 09-07-2013, 09:47 AM Thread Starter
Registered User
 
tvman44's Avatar
 
Join Date: Jun 2013
Country: United States
First Name: Bob
Posts: 489
 
Default Pattern/Trim Router Bits

Thinking about a Pattern/Trim Router Bit for a upcoming project and have a couple of questions for the experienced people here:
1: Is a 3 flute bit any better then a 2 flute bit? Seems like it might stay sharper a little longer?, Don't know who makes a 3, but I have seen a picture of a 3 flute trim bit.
2: Does the diameter of the bit make any difference, or any diameter will do?

TIA
Bob

Papa Bob
Using a couple of old Craftsman routers & a Bosch 1617EVSPK & a Dewalt DWP611PK Routers in SW Louisiana.
tvman44 is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 09-07-2013, 11:52 AM
Moderation Team
 
Semipro's Avatar
 
Join Date: Mar 2013
Country: United States
First Name: John_*
Posts: 4,508
 
Default

Bob
The diameter of the bit would depend on the pattern you were cutting,lot of tight corners smaller diameter
Semipro is online now  
post #3 of 11 (permalink) Old 09-07-2013, 11:56 AM
Retired Moderator
 
Mike's Avatar
 
Join Date: Nov 2004
Country: United States
First Name: Mike
Posts: 11,319
 
Send a message via Skype™ to Mike
Default

Bob, as a rule these bits will be 1/2" diameter and 3/4" is available. The size question is two sided: a larger bit will clear the dust and chips quicker but the smaller diameter bit allows for tighter curves. (either will work fine) In theory the three flute bit will cut cleaner but I have not seen much difference and the two flute bits work fine.

There are very handy bits available that have a bearing on each end of the cutter so it can be used for patterns or table mounted. One bit doing the job of two bits.

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 #4 of 11 (permalink) Old 09-07-2013, 12:11 PM
Marine Engineer
 
kp91's Avatar
 
Join Date: Sep 2004
Country: United States
First Name: Doug
Posts: 2,751
 
Default

Quote:
Originally Posted by tvman44 View Post
Thinking about a Pattern/Trim Router Bit for a upcoming project and have a couple of questions for the experienced people here:
1: Is a 3 flute bit any better then a 2 flute bit? Seems like it might stay sharper a little longer?, Don't know who makes a 3, but I have seen a picture of a 3 flute trim bit.
2: Does the diameter of the bit make any difference, or any diameter will do?

TIA
Bob
Bob,

I think Freud and a couple of others make cutters with more than 2 flutes. I have a bunch of flush trim bits and pattern bits from a handful of makers, and they all work about the same. My favorite pattern bit set is one from Grizzly

Grizzly.com

It's about $20 on sale, and the finish is about as good as some of the others that are twice the price. I have some porter cable and oldham Viper flush trim bits, they work very well. The PC set has a tiny 1/4 inch flush trim bit that I use for small inside cuts.

Porter Cable PC03TRM Router Bit Set, Flush Trim, 3 Pc

I picked up some bits with square bearings on advice of another forum member, and I really like them.

https://www.routerbits.com/square-eu...ing-trim-bits/

Doug
1 John 1:9
Fredericksburg, VA
kp91 is offline  
post #5 of 11 (permalink) Old 09-07-2013, 08:23 PM
Official Greeter
 
jw2170's Avatar
 
Join Date: Jan 2008
Country: Australia
First Name: James
Posts: 16,713
 
Send a message via Skype™ to jw2170
Question

Quote:
Originally Posted by kp91 View Post
Bob,

I think Freud and a couple of others make cutters with more than 2 flutes. I have a bunch of flush trim bits and pattern bits from a handful of makers, and they all work about the same. My favorite pattern bit set is one from Grizzly

Grizzly.com

It's about $20 on sale, and the finish is about as good as some of the others that are twice the price. I have some porter cable and oldham Viper flush trim bits, they work very well. The PC set has a tiny 1/4 inch flush trim bit that I use for small inside cuts.

Porter Cable PC03TRM Router Bit Set, Flush Trim, 3 Pc

I picked up some bits with square bearings on advice of another forum member, and I really like them.

https://www.routerbits.com/square-eu...ing-trim-bits/
Hi Doug, how do those square bearings work in tight corners or circular templates (inside)?

James
Sydney, Australia
.

I don't mind if other members disagree with my comments.
I don't profess to know everything, and I may learn something new.

"Never attribute to malice that which is adequately explained by stupidity."




jw2170 is offline  
post #6 of 11 (permalink) Old 09-07-2013, 08:35 PM
Registered User
 
Join Date: Jun 2011
Country: United States
First Name: Duane
Posts: 1,699
 
Default

Quote:
Originally Posted by jw2170 View Post
Hi Doug, how do those square bearings work in tight corners or circular templates (inside)?
A 3/4" bit can't cut an 1/8" radius... no matter the shape of the guide bearing! The limitation is the diameter of the bit. However I think the square bearing would limit the radius even more, but only a little.

I have found that hand tools are the best choice when I want to make mistakes at a slower rate of speed.

I don't suffer from insanity. I enjoy every minute of it.
Dmeadows is offline  
post #7 of 11 (permalink) Old 09-07-2013, 09:45 PM
Registered User
 
JOAT's Avatar
 
Join Date: Apr 2010
Country: United States
First Name: Theo
Posts: 2,494
 
Default

I have some masters I use that have some pretty tight spaces. So first go around is with a 1/2" bit, then 1/8" to get the finer details. Don't do that often, but works out well when I do.

NC via the Army in 1979; retired in 1981, and just east of Raleigh ever since.
Remember, when I tell you how I do something, that does not mean I recommend you do it my way. Different backgrounds, different experiences; what works for me, may not for you.
"It ain't what you're told, it's what you know." - Granny Weatherwax
JOAT is offline  
post #8 of 11 (permalink) Old 09-07-2013, 10:04 PM
Marine Engineer
 
kp91's Avatar
 
Join Date: Sep 2004
Country: United States
First Name: Doug
Posts: 2,751
 
Default

I've only used them for trimming laminate or edge banding, as that is all they are designed for. They have a short depth of cut, so they're not useful for pattern routing.

They get anywhere you can bend formica, except for a hard inside corner, where a round bit won't work anyway.

Doug
1 John 1:9
Fredericksburg, VA
kp91 is offline  
post #9 of 11 (permalink) Old 10-15-2013, 12:05 AM
Registered User
 
Join Date: Oct 2013
Country: United States
First Name: Eric
Posts: 10
 
Default

What is about a square bearing that works better? I'm trying to see how it would be any different. Seems like it would take outside corners the same way as circle bearings.
Capt Caveman is offline  
post #10 of 11 (permalink) Old 10-15-2013, 08:58 AM
Registered User
 
Join Date: Aug 2010
Country: United States
First Name: pat
Posts: 808
 
Default

"Does the diameter of the bit make any difference, or any diameter will do? "
********************************
Deflection causes chatter.
Chatter = bumpy cuttings that need sanding, and yield tearout and tool breakage.
Skinny bits, .500" or less, will deflect.
Take out (grind) more of its (a trimmer) body for a 3rd flute and it will deflect even more than a 2 flute bit.
Moreover, there is no practical advantage to a 3 flute trimmer except to the selller.

Effect of cutting diameter: Whence the body of a cutter has not been ground below its shank diameter it has deflection resistance. Cutters > ~.6" are much stiffer than cutters < or = .5 when the shank = .500".
Diameter matters.
Quillman 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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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
Sort Members by City or Zip RJM60 Site Help and Suggestions 56 03-13-2014 05:40 PM
Replacement Router Bits for the Craftsman Router Crafter Brian in Burlington Router Bits - Types and Usage 1 11-17-2009 11:33 AM
How to buy router bits xplorx4 Router Bits - Types and Usage 31 02-09-2009 01:04 AM

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