Please help me make a jig. - Router Forums
 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 03-30-2012, 11:36 PM Thread Starter
Registered User
 
Join Date: Mar 2012
Country: United States
First Name: mark
Posts: 5
 
Default Please help me make a jig.

I have been trying to make a jig today to cut a 7.5"x2.5" recess in a 8.5"x3.5" piece. I figured that since my router base is 6", i just add that to my length and width and that would give me the size I need. Then I realized I was not taking into account the size of the bit i was using. I am using a 1/2" bit so I subtracted that from my measurement and it still isn't quite right. Any tips would be great. Thanks!
black3000gt is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 03-30-2012, 11:45 PM
Registered User
 
The Warthog's Avatar
 
Join Date: Nov 2010
Country: Canada
First Name: Roger
Posts: 413
 
Default

You may have taken the whole ½" diameter of the bit away from the edge of the jig. In fact, if your baseplate is 6" and the bit is ½", then the edge of the baseplate is 2 3/4" from the edge of the bit. That is, 3" from the centre of the baseplate and bit to the edge of the baseplate, minus ¼" from the centre of the baseplate to the edge of the bit. Your stop block needs to be 2 3/4" from the edge of the planned recess. Measure this with a ruler before you set out the edges of your jig.

Cheers,
Roger


I'm not slow, I'm pacing myself!

Isaiah 44:13 Another shapes wood, he extends a measuring line, he outlines it with red chalk. He works it with planes and outlines it with a compass...

Usual kit: Table saw, band saw, dual base router and table, lathe, various saws, planer, sanders, and a multitude of hand tools.
The Warthog is offline  
post #3 of 3 (permalink) Old 03-31-2012, 10:14 AM
Honored Member
 
harrysin's Avatar
 
Join Date: Jan 2007
Country: Australia
First Name: Harry
Posts: 14,403
     
Send a message via Skype™ to harrysin
Default

Quote:
Originally Posted by black3000gt View Post
I have been trying to make a jig today to cut a 7.5"x2.5" recess in a 8.5"x3.5" piece. I figured that since my router base is 6", i just add that to my length and width and that would give me the size I need. Then I realized I was not taking into account the size of the bit i was using. I am using a 1/2" bit so I subtracted that from my measurement and it still isn't quite right. Any tips would be great. Thanks!
This is how I rout a recess using a template and guide. To calculate the size of opening in the template, guide dia. minus bit diameter plus the size of the recess.
If you used a 1" guide and a 1/2" bit, then: 1-1/2+7.5=8"...1-1/2+2.5=3"
so, a template with a cut-out measuring 8" x 3" using a 1" guide and a 1/2" bit will give you the required size of rebate. The first shot shows the easy way to make a template with an accurate cut-out.
Attached Thumbnails
Click image for larger version

Name:	ring-box24.jpg
Views:	94
Size:	39.0 KB
ID:	51358  

Click image for larger version

Name:	ring-box25.jpg
Views:	92
Size:	25.4 KB
ID:	51359  

Click image for larger version

Name:	rings-in-box.jpg
Views:	94
Size:	49.3 KB
ID:	51360  


Harry



Nothing but heaven itself is better than a friend who is really a friend. - Plautus






harrysin 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
Porter Cable 55160 Omnijig Review Echonav Tool Reviews 19 06-21-2015 03:59 AM
EZ Dovetail Jig bobj3 Jigs and Fixtures 7 04-02-2014 08:43 PM
How to Make a Picture Frame learnexperience Table-mounted Routing 10 09-24-2011 05:48 AM
Sliding Mortise Jig Glen L Jigs and Fixtures 6 02-23-2011 11:11 PM
Bj's Dado Jig RustyW Jigs and Fixtures 1 10-06-2009 06:09 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