Hello 1083107,

I thought that you set the depth of the mortise you want to make, then you crank the handle and when it hits that predetermined depth the the mechanism will automatically reverse as you crank the handle.

-WJA

Hello jlev,

You are correct Porter Cable has discontinued all of the bits for their 513 Lock Mortiser. Here is a link to a company that you will be able to get them from. link removed.

Hope this helps,
-WJA

Hello Vaughnrr,

The earlier 513 Lock Mortiser used the Porter-Cable 5372 router motor. It is no longer manufactured. It had a larger diameter motor than the motor they are currently using now, which is the 6902. I don't know if you can mix or match parts from the different types of mortisers to get a new style motor on a old style mortiser. You may try a search for the older style motor, someone may have one they don't want.

Good luck,
-WJA

Thanks, for the information.
The problem is that the standard configuration of either motor will not interface with the mounting on the Mortiser. It appears that there is a special three lug twist lock type plate that is needed. I'm not sure if this is a special end bell on the shaft end of the motor or a separate adapter plate. Again the parts schematics do not provide this information? A similar mounting was used on old porter cable power planes as well. I would guess they were also powered by the same router motor. An additional problem is the connection of the cutter shaft to the motor. It looks like a special collect but not the ones found on the routers you list.
Please let me know if I'm missing something or if there are any drawings available which clarify these issues.
If I can get the unit running I plan to replace the plain bushings with preloaded ball bushings and hardened shafts and to put adjustable stops for each end of the stroke. This should allow precision mortising for loose tenons on a series of doors I plan to make. (I'm a machinist and machine designer)
Thanks again,
RRV

Hello,

I have seen this this before when someone will replace the bearings in the router motor but not the bearing in the mortiser itself. It is part number 890031, If you have replaced the mortiser bearing, make sure the bearings in the router motor are tight and there is no movement in the housings. If everything is alright with the bearings, the cutter shaft, part number 695474 might have been bent slightly and is causing the vibration.

Good luck
WJA

The door needs to be vertical regardless. If the machine has worked with the mortiser clamped to the door lying on its side in a stand before, you were lucky if it did.

The easiest way I have found is to remove the top of the motor assembly and clamp, very carefully, to the armature with protected grips. The shaft is quite tight but it will break loose.

Having failed bearings to armature we need to remove cutter spindle from armature. Please advise as to how to do this? Thank you.

Hello Jesus,

You will need two wrenches to remove the cutter shaft from the 513 mortiser. One to hold the collet chuck on the router motor and one to turn the cutter shaft. Porter-Cable used two different motors for the 513. One was a model 6902 and the other was 5372. The wrenches are not the the same for these motors. Check the type number on your model also.

Hope this helps,
WJA