The "centering cone" is necessary to accurately center the base onto the router base frame.
This is a must, when you're using a router bit in the bushing---the bit needs to be accurately centered.
Insert the centering bit into the collet, hand-tighten the collet nut.
Position the base losely on the router base.
Insert the screws---
align the base opening with the cone, so it makes intimate contact around the cone and with the opening in the base.
Rotate the router collet by hand during centering.
Tighten the screws.
Remove the centering cone, and store it with your router bits and bushings.
Good luck with building that table Tim. And if you have the time after you've finished, please post a photo so we can all see it. I'd like to have a visual of your handiwork. :)
Timothy Small said:
I started making a poor mans router table this week with 2'x3' sheet of 3/4 MDF. That will be a big help as well. I'm really looking forward to adding a extra touch to my projects with the router.
Countersunk holes in the router base plate should align with mounting holes in the router base---
and they will, if the holes are machined accurately.
However, I've found some to be off a tad, and required some fine tuning to make the mounting holes ''dead on".
Elongated holes in the base plate provides for adjustment.
"If you can't make it perfect, make it adjustable".
When the base plate in not centered with the collet, the router bit will interfere in the bushing.
Insure there is not metal to metal contact with the router bit cutters and the bushing.
Rotate the collet, back and forth, by hand to insure there is clearance, before operating the machine.
Perform with task with the machine disconnected from electrical service.
A router can be a very dangerous tool in the hands of an untrained user.
perform any adjustments, installing/removing a bit, or performing any service to the router with the power supply connected.
A spinning router bit can grab clothing material and cause serious bodily injury.
It'll be all over, but the shoutin'.
Timothy Small said:
>>>...I just thought the base and screws where predetermined. .../div>