Routing deep mortise - Router Forums
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 18 (permalink) Old 08-31-2010, 09:42 AM Thread Starter
Registered User
 
Join Date: Feb 2009
Country: United States
First Name: Dale
Posts: 12
 
Default Routing deep mortise

I am in the process of building a workbench and have eight 2-1/4" x 1-1/2" x 3" deep mortises I need to cut. Of the many ways I could go about producing these mortises, it seems using my plunge router would result in cleaner and more accurate mortises.

How would you recommend I go about routing a deep mortise: process?, type of bit (most plunge bits I have seen don't have the length to cut that deep)? and where to get such a bit if one were available?

Thanks,

Dalec
Dalec is offline  
Sponsored Links
Advertisement
 
post #2 of 18 (permalink) Old 08-31-2010, 09:53 AM
Forum Contributor
 
Join Date: Jan 2006
Country: United States
First Name: Bj
Posts: 23,786
       
Default

Hi Dalec

I would suggest using a spade bit to hog out most of the wood and then use the bits below to clean up the hole with a template and/or brass guide on your plunge router base plate.

1 pc 1/2"SH 2-1/2" Blade Top Bearing Trim Router Bit - eBay (item 130425183413 end time Sep-25-10 15:53:21 PDT)

1 pc 1/2" SH 3" Blade Extra Long Straight Router Bit - eBay (item 130426568658 end time Sep-29-10 16:37:46 PDT)

=======

Quote:
Originally Posted by Dalec View Post
I am in the process of building a workbench and have eight 2-1/4" x 1-1/2" x 3" deep mortises I need to cut. Of the many ways I could go about producing these mortises, it seems using my plunge router would result in cleaner and more accurate mortises.

How would you recommend I go about routing a deep mortise: process?, type of bit (most plunge bits I have seen don't have the length to cut that deep)? and where to get such a bit if one were available?

Thanks,

Dalec

"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  
post #3 of 18 (permalink) Old 08-31-2010, 10:03 AM
Registered User
 
istracpsboss's Avatar
 
Join Date: Sep 2008
Country: Croatia
First Name: Peter
Posts: 1,683
 
Default

Hi dalec

3" bits are available, but you will probably find they exceed the travel of the plunge so would make using them for such deep mortising complicated. Ones like 1 pc 1/2" SH 3" Extra Long Flush Trim Router Bit - eBay (item 130426115276 end time Sep-05-10 11:23:34 PDT) with the bearing removed might do. Better still
1 pc 1/2" SH 3" Blade Extra Long Straight Router Bit - eBay (item 130426568658 end time Sep-29-10 16:37:46 PDT)

I must stop looking on that web site. There are too many temptations !

Cheers

Peter
istracpsboss is offline  
post #4 of 18 (permalink) Old 08-31-2010, 10:04 AM Thread Starter
Registered User
 
Join Date: Feb 2009
Country: United States
First Name: Dale
Posts: 12
 
Default

Thanks Bobj3.

I got stuck in routing out the entire mortise. Had not even thought about drilling out most of the waste before using a trim bit to clean up the mortise.

Dalec
Dalec is offline  
post #5 of 18 (permalink) Old 08-31-2010, 10:05 AM
Registered User
 
istracpsboss's Avatar
 
Join Date: Sep 2008
Country: Croatia
First Name: Peter
Posts: 1,683
 
Default

Snap ! I was looking while you were writing, Bob !

Cheers

Peter
istracpsboss is offline  
post #6 of 18 (permalink) Old 08-31-2010, 10:13 AM Thread Starter
Registered User
 
Join Date: Feb 2009
Country: United States
First Name: Dale
Posts: 12
 
Default

Peter,

Thinking with bearing guided trim bits, that I could gain some additional depth by using two different length trim bits so I can step my way down to a deeper mortise or use differing thickness template material and step down that way. Don't know if this would gain me much more depth however.

Dalec
Dalec is offline  
post #7 of 18 (permalink) Old 08-31-2010, 11:18 AM
Forum Contributor
 
Join Date: Jan 2006
Country: United States
First Name: Bj
Posts: 23,786
       
Default

Hi Dalec

Once you clean out the hole down ,than route the hole out to say 1 1/2" the rim of the hole will give you a nice edge to ride on with the bearing or the brass guide template..I have push my bit to 3 1/2" deep without any error..

=========

Quote:
Originally Posted by Dalec View Post
Peter,

Thinking with bearing guided trim bits, that I could gain some additional depth by using two different length trim bits so I can step my way down to a deeper mortise or use differing thickness template material and step down that way. Don't know if this would gain me much more depth however.

Dalec

"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  
post #8 of 18 (permalink) Old 08-31-2010, 03:46 PM Thread Starter
Registered User
 
Join Date: Feb 2009
Country: United States
First Name: Dale
Posts: 12
 
Default

Thanks Bobj3 and Peter.

I appreciate the suggestions and can see the solution.

Dalec
Dalec is offline  
post #9 of 18 (permalink) Old 09-06-2010, 12:00 PM
Registered User
 
Join Date: Aug 2010
Country: United States
First Name: pat
Posts: 808
 
Default

Key here is good and repeatable/indexable fixturing; without it , forget my proposal.
Indeed drill out most of the waste. Then rout all mortices with with generic HSS cutter maybe 1/2 x 2-1/2 long. Stay inside of the net dimensions x ~1/16" all around.
Now change to long (4-5" OAL) SC up-spiral or another longer HSS straight bit to waste to depth and width. All stock most go back into the fixturing just the way it came out in step one. Note this longer cutter will already have an inch or so of projection whence the motor head is all the way up the tubes. So take these first, tho modest cuts, with care.
Quillman is offline  
post #10 of 18 (permalink) Old 09-13-2010, 08:01 AM Thread Starter
Registered User
 
Join Date: Feb 2009
Country: United States
First Name: Dale
Posts: 12
 
Default

Thanks Quillman.

I really appreciate the responses I have gotten. It is like talking over a problem with a number of people in person and as the discussion continues suggestions begin to form into a process that will work for me. Quillman, even when I thought I had it figured out, your description of how to go about it, added to my thinking about what is now my approach.

Thanks everyone who had contributed your suggestions.

Dalec
Dalec 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
Forum Suggestion Thread Mark Site Help and Suggestions 131 02-08-2015 09:33 AM
CNC routing as first routing experience ianthehenry CNC Routing 23 04-25-2012 04:24 AM
Deep Mortise Question mbg Tools and Woodworking 13 09-22-2009 02:12 PM
How deep is to deep? jschaben Router Bits - Types and Usage 8 08-13-2009 09:50 AM
TS / Router / Mortise Combo PART1 kolias Jigs and Fixtures 1 05-04-2009 06:52 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