[Harlan P. Hansen]

I bought a
biscuit cutter for my router.
Router runs fine with all my bits, but when I put on the bisquet cutter, it won't run.
Leave the new shaft in, take off the cutter, router runs fine.
Any suggestions. Using a Craftsman plunge router on a router table.

 

[jw2170]

Welcome to the forum, @Harlan P. Hansen ,
Not sure what you mean by "Leave the new shaft in, take off the cutter" ???

PS that .png file is not showing any view?

 

[DesertRatTom]

Welcome. Same question,what do you mean either. If you can, kindly repost the picture as a jpg. What you're describing should have no impact on a router's running.

 

[old55]

Welcome to the forum @Harlan P. Hansen

 

[Harlan P. Hansen]

the bisquet cutter is bigger around than the other bits.
It turns freely, but the router will start and then turn off when the cutter is attached.
The router runs with all the other heads.

 

[DesertRatTom]

Does the router vibrate when you turn it on? Does it stall when you apply the bit to a board, or does it stop before it hits wood? Is there an insert around the bit when it's turned on? Is the bit biting into some part of the table?

Your bit looks like this? Is it a half inch shank or shaft?

 

[jw2170]

"The router runs with all the other heads. "
This response confuses me.
Are you using a very old set of cutters, where the head is interchangeable?
The shaft should be attached to the cutter as per the picture that Tom posted.

Until we see a picture of your setup, I don't see how we can help.
Sorry.

Are you using something like this?

Torquata Biscuit Slot Cutter Kit

Perfectly designed for clean, quick cutting, these 4mm thick slot cutter assemblies - available in 1/4in and 1/2in shanks - comes with the standard bearing.

www.timbecon.com.au

 

[Harlan P. Hansen]

Stops before it hits the wood.
Turns on for a few seconds, then just stops.
Not vibration.

 

[mdfled]

Do you get a hum from the motor when it stops or does it seem like the power is cut off to the motor? How old Is your router? Perhaps the bearings are getting worn and when you put in the larger biscuit cutting bit it puts enough strain on the bearings that they overheat, or they cause worn brushes to stop making contact with the commutator? You haven't mentioned what the sizes of the other bits are, if the rest of the bits have a small radius, they may not create the same strain on the motor. Have you checked your brushes to make sure they aren't worn to the point where they are just barely in contact with the commutator? Have you measured runout on the shaft to see if everything is aligned and not sloppy with play? Does the router come right back on after it stops if you take the biscuit bit out, or does it take a while to "reset" like there is a thermal protection device keeping the motor from restarting?

Please give us some more information so you get more refined answers. Pictures always help!

 

[BigG]

I would suggest you unplug your router pull out and check both your motor brushes. They might be just wore out. It’s very easy to check your brushes. Both sides of the motor has round caps, to remove just unscrew the caps to reveal the brushes. There will be a spring and a carbon piece called a brush. That is what runs against the motor armature.

 

[dwardio]

Sounds like worn brushes as others have suggested, but really can’t tell without more info.