Paul Chapman
Established Member
Here's an adjustable trammel I made for my DeWalt 625
The trammel is made of MDF and a couple of scraps of hardwood. Drill one end of the MDF to take the cutter (the size of this hole is not critical and I drilled mine quite large), and three holes to fit it to the base of the router - these are countersunk to take countersunk machine screws.
At the other end rout a 1/4" slot (this will take the pivot pin - for which I used an extra-long drill bit - and allow adjustment of the trammel) and drill two countersunk holes.
In the longer piece of hardwood, rout two 1/4" slots to line up with the two holes drilled in the MDF. Glue the shorter piece of hardwood to the longer piece and then drill this with a 1/4" hole to line up with the 1/4" slot in the MDF.
In use, a 1/4" hole is drilled in the workpiece, the extra-long drill bit inserted through the hardwood block and into the workpiece and the two wing nuts tightened when the trammel has been adjusted to the correct diameter.
Cheers :wink:
Paul
![Competition24-1.jpg](https://proxy.imagearchive.com/df7/df70309048e664570d85ab3879b8b8f1.jpg)
![Competition25.jpg](https://proxy.imagearchive.com/ab9/ab9883820fd5142d5625c077c7270db1.jpg)
![Competition29.jpg](https://proxy.imagearchive.com/665/665ebb37309361cd6611d165211af70d.jpg)
The trammel is made of MDF and a couple of scraps of hardwood. Drill one end of the MDF to take the cutter (the size of this hole is not critical and I drilled mine quite large), and three holes to fit it to the base of the router - these are countersunk to take countersunk machine screws.
At the other end rout a 1/4" slot (this will take the pivot pin - for which I used an extra-long drill bit - and allow adjustment of the trammel) and drill two countersunk holes.
In the longer piece of hardwood, rout two 1/4" slots to line up with the two holes drilled in the MDF. Glue the shorter piece of hardwood to the longer piece and then drill this with a 1/4" hole to line up with the 1/4" slot in the MDF.
In use, a 1/4" hole is drilled in the workpiece, the extra-long drill bit inserted through the hardwood block and into the workpiece and the two wing nuts tightened when the trammel has been adjusted to the correct diameter.
Cheers :wink:
Paul