Long Router bits - How long is too long? - Woodworking Talk - Woodworkers Forum
 1Likes
  • 1 Post By John Smith_inFL
 
Thread Tools Display Modes
post #1 of 7 Old 11-18-2019, 03:12 PM Thread Starter
Member
 
Join Date: Jan 2010
Posts: 72
View cburdick1's Photo Album My Photos
Long Router bits - How long is too long?

Hello everyone,

I've been looking at doing some deep boring into some large logs that I have. Whiteside has some 5" long spiral bits, and it got me thinking: how long is too long?

Obviously it would need to be used carefully... I was planning on using my heavy duty Bosch router, making an oversize router base plate from 1/4" aluminum for stability and making a special table to support the whole thing...

Anyway, I was wondering if anyone has experience with using long router bits and where they sourced them from.
cburdick1 is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old 11-18-2019, 03:22 PM
Moderator
 
John Smith_inFL's Avatar
 
Join Date: Jul 2018
Location: Central Florida
Posts: 1,074
View John Smith_inFL's Photo Album My Photos
what is your project ?? what do you mean by "deep boring" ??
photos, drawings, sketches and a better description of your project
will get you more accurate responses.

I would remove as much material as possible with forstner bits
and just clean up the cavity with the router.
trying to remove it all with just the router is not a really good idea.
woodnthings likes this.

-- I am a painter. That's what I do. I paint things --

Last edited by John Smith_inFL; 11-18-2019 at 03:56 PM.
John Smith_inFL is online now  
post #3 of 7 Old 11-18-2019, 03:39 PM Thread Starter
Member
 
Join Date: Jan 2010
Posts: 72
View cburdick1's Photo Album My Photos
I have some nice big pieces of walnut and cherry and I wanted to turn them into bowls or something of the sort. I got the idea of making them asymmetrical (unlike turned pieces made on a lathe) so one of the methods I thought of would be to hollow out the pieces as much as possible using forstners and drill bits, then finish the process with long router bits to clean up the sides, using some creative patternmaking. Sorry, as I write this I realize that perhaps it's a bit complicated to put into words.

So, if I can mount it securely, and take small cuts on each pass... is using a 5" bit completely crazy?
cburdick1 is offline  
Sponsored Links
Advertisement
 
post #4 of 7 Old 11-18-2019, 03:49 PM
Moderator
 
John Smith_inFL's Avatar
 
Join Date: Jul 2018
Location: Central Florida
Posts: 1,074
View John Smith_inFL's Photo Album My Photos
I fully understand what you want to do.
for bowls and such, I would visit the KUTZALL and King Arthur's Tools
websites and see what kind of tools they have that would serve your
needs better (and safer).
for large bowls, I would use the 4" angle grinder and some aggressive cutters.
maybe it is time for you to invest in a flex shaft tool if you want to do
a lot of this type of projects.
I have done a lot of power carving as well as turning on a lathe.
personally, I get more satisfaction out of power carving as you are not
limited to perfectly symmetrical round projects.
just dig in and have fun with it !! think safe & work safe.

oh, and to answer your question: "is using a 5" bit completely crazy?"
yes, yes it is - and also unsafe.

.

.

-- I am a painter. That's what I do. I paint things --

Last edited by John Smith_inFL; 11-18-2019 at 04:24 PM.
John Smith_inFL is online now  
post #5 of 7 Old 11-18-2019, 08:44 PM
Village Idiot
 
epicfail48's Avatar
 
Join Date: Mar 2014
Location: Springfield MO
Posts: 4,707
View epicfail48's Photo Album My Photos
Bit length is, for the most part, dependent on diameter. A 3" long 1/8" diameter cutter is a bad idea, but a 3/4" diameter cutter could handle that length fine the rule of thumb is 3-5x the diameter, and bear in mind that's for the entire portion of the bit that isn't in the collet.

All that said, I don't think I'd want to use a 5" bit of any diameter. Too much stick-out, would be hard to control under idea circumstances and spinning it at router speeds will probably lead to some weird harmonics

I need cheaper hobby
etsy.com/shop/projectepicfail
epicfail48 is online now  
post #6 of 7 Old 11-18-2019, 09:06 PM
No Longer Here
 
Join Date: Nov 2019
Posts: 185
View bob493's Photo Album My Photos
Id agree with the concensus that a 5" bit is probably not the best thing to do. If its that deep, you wont see it anyway, so smack it with a chisel imo. Good luck!
bob493 is offline  
post #7 of 7 Old 11-18-2019, 11:16 PM
Senior Member
 
Join Date: Aug 2012
Location: British Columbia, Canada
Posts: 5,283
View FrankC's Photo Album My Photos
If you can find a 5" bit with a 1/2" shank with a diameter larger than the shank your idea could work with a few if's.

If you are doing what I think you are you will have a wide base, a bushing and a template:

Using a hand held router you should work your way down in layers, depending on how hard the wood is will determine depth of cuts for each layer.

There will likely not be enough travel in your router to raise the 5" bit high enough to only take a shallow cut so you will have to start with a shorter bit, ideally the same diameter, then change to the longer bit.

Don't get too aggressive and it should work.

Wise men speak because they have something to say; fools because they have to say something -Plato

FrankC
http://sawdustmaking.com
http://woodworkerglossary.com
FrankC is online now  
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



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