A flush trim bit question. - Woodworking Talk - Woodworkers Forum
 
Thread Tools Display Modes
post #1 of 6 Old 07-03-2015, 09:02 AM Thread Starter
Senior Member
 
hawkeye10's Avatar
 
Join Date: Feb 2015
Location: Murfreesboro, Tn.
Posts: 1,173
View hawkeye10's Photo Album My Photos
A flush trim bit question.

I am guilty of buying cheap router bits. My question is about the distance between the bearing and the cutter. Would a quality flush trim bit like Whiteside have the bearing closer to the cutter than cheap bits? If you need more information please ask.

Don
hawkeye10 is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old 07-03-2015, 09:34 AM
Senior Member
 
Join Date: Aug 2010
Location: Maine
Posts: 1,932
View Hammer1's Photo Album My Photos
They are pretty much the same. Normally, there is a thin washer between the bearing and the bit to help keep debris out. The bearing post will have a shoulder that keeps the bearing from contacting the cutter. There are differences in bearing size depending on the bit. A 1/4" shank flush cutting bit with a smaller cutter will use a small bearing, 1/2" shank bits with larger cutters use a larger bearing. Smaller bits for thinner material. In addition to the normal bearings there are Euro bearings which have a square plastic shroud around the bearing. These are used so the bearing doesn't turn against your work and leave a mark. Flush trim bits come not only in various sizes but the bearings can be bottom or top mounted. If you are template routing, the template needs to be about 1/4" thick for the bearing to ride on. The real difference between an inexpensive bit and more expensive brand name is the quality and thickness of the carbide, not much difference in the other parts of the bits.
Hammer1 is offline  
post #3 of 6 Old 07-03-2015, 12:13 PM
Wood Snob
 
Al B Thayer's Avatar
 
Join Date: Dec 2011
Posts: 5,963
View Al B Thayer's Photo Album My Photos
I believe the difference between good bits and cheap bits would be in the sharpness and how long better steel lasts. Also how well the bearing fits and spins. I also find better bits are truer with less wobble.

If I had a bit that took more or less wood off I would probably just think it was the way I made the cut.

Al


Al B Thayer is offline  
Sponsored Links
Advertisement
 
post #4 of 6 Old 07-03-2015, 01:52 PM
Senior Member
 
Join Date: Nov 2008
Location: Monterey Bay California
Posts: 912
View Marv's Photo Album My Photos
Here are some of my flush trim bits Don and from the left I have an Oakland Carbide, Bosch, Bosch, CMT, Freud, Whiteside, Whiteside, Whiteside, not sure and Bosch. By eye most of them appear very similar in distance from bearing to cutter however the shorter Whiteside template bit to the right is a little closer and the Whiteside spiral bit has the cutter about 1/2 the distance closer to the bearing than the others. If you need some critical info I'll break out a feeler gauge and get some measurements for you.


Post count on a forum does not denote level of knowledge, skill nor experience
Marv is offline  
post #5 of 6 Old 07-03-2015, 04:35 PM Thread Starter
Senior Member
 
hawkeye10's Avatar
 
Join Date: Feb 2015
Location: Murfreesboro, Tn.
Posts: 1,173
View hawkeye10's Photo Album My Photos
Quote:
Originally Posted by Marv View Post
Here are some of my flush trim bits Don and from the left I have an Oakland Carbide, Bosch, Bosch, CMT, Freud, Whiteside, Whiteside, Whiteside, not sure and Bosch. By eye most of them appear very similar in distance from bearing to cutter however the shorter Whiteside template bit to the right is a little closer and the Whiteside spiral bit has the cutter about 1/2 the distance closer to the bearing than the others. If you need some critical info I'll break out a feeler gauge and get some measurements for you.

Thanks Marv for the good information. I bought several of these Fisker templates and attached some luan to them for inlays. The edges of the Fisker template are beveled so it's hard to get the bearing to follow the Fiskers template. I think the Whiteside spiral will work for me.

Thanks again; Don

http://www.amazon.com/Fiskars-8-5x11...55182&sr=1-114
hawkeye10 is offline  
post #6 of 6 Old 07-03-2015, 05:03 PM
Senior Member
 
Join Date: Nov 2008
Location: Monterey Bay California
Posts: 912
View Marv's Photo Album My Photos
You're welcome Don and one thing to note is I have another one of that exact Whiteside spiral bit permanently set up in one of my router tables and a quick look shows it actually has a wider spacing than the one shown! (it's actually closer to the spacing of all the other bits).

Post count on a forum does not denote level of knowledge, skill nor experience
Marv is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Woodworking Talk - Woodworkers Forum 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










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
flush trim bit ??? timbecht General Woodworking Discussion 9 07-14-2013 08:15 PM
Alignment on a new flush Trim bit railaw Power Tools & Machinery 13 06-24-2013 08:11 PM
Panel Pilot or Flush Trim Bit? Crick07 Tips, Tricks, & Homemade Jigs 2 11-13-2012 09:27 PM
Flush Trim Bit on Metal Guide JollyRoger808 General Woodworking Discussion 11 04-03-2012 03:16 PM
flush trim bit Dvoigt General Woodworking Discussion 2 04-30-2009 08:58 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 Off
Refbacks are Off

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