I have a Delta 14-650 hollow chisel mortiser that has quite a bit of runout in the jaws (i.e., using a bit to measure it), but nearly none in the shaft or chuck body. I’d like to remove it to investigate but can’t figure out how. The manual says to put a screwdriver in the top part of the shaft above the motor, and to use the chuck key to unscrew it. But I’m not sure what the last part means—to use the key to hold the chuck so the shaft can be unscrewed, or twist the key as if you are loosening the jaws until the body unscrews. Any ideas?
Anyone know how to remove chuck on Delta Mortiser?
- Thread starter Kpp80202
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tjbnwi
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Once you lock the shaft with the screwdriver, put the key in a hole in the side of the chuck, tap the key in the clockwise direction, the chuck should break loose.
I’m lazier than that, I chuck up an allen key that has a drive for an impact in the chuck, spin the chuck off with an impact.
Tom
I’m lazier than that, I chuck up an allen key that has a drive for an impact in the chuck, spin the chuck off with an impact.
Tom
- Joined
- Feb 22, 2016
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IF it's a threaded chuck which is appears to be in the exploded parts diagram below I believe
you would insert the end of the chuck key handle into the pilot hole in the chuck. It should be
a RH thread. I looked at an online parts depot which has detail photos of each part. The motor
adapter clearly shows the threads that the chuck threads on to and they appear to be RH threads.
Both the Delta 14-650 and the 14-651 use the same motor shaft adapter from what I could find.
https://www.ereplacementparts.com/adapter-p-88532.html
If you look at the photo of the adapter at the link above you will notice it has two flats for a wrench.
You'd have to hold the motor shaft from turning to be able to get this adapter off the motor shaft.
For additional leverage you could use a steel rod of the correct diameter but if you go undersize
you risk deforming the key hole and you will be reminded of this choice every time you change a
bit. You probably have a drill bit that will fit snugly but you will (not might) bend the bit and ruin it
so pick something else or use a dull bit you've been telling yourself to sharpen for the past 10 years.
you would insert the end of the chuck key handle into the pilot hole in the chuck. It should be
a RH thread. I looked at an online parts depot which has detail photos of each part. The motor
adapter clearly shows the threads that the chuck threads on to and they appear to be RH threads.
Both the Delta 14-650 and the 14-651 use the same motor shaft adapter from what I could find.
https://www.ereplacementparts.com/adapter-p-88532.html
If you look at the photo of the adapter at the link above you will notice it has two flats for a wrench.
You'd have to hold the motor shaft from turning to be able to get this adapter off the motor shaft.
For additional leverage you could use a steel rod of the correct diameter but if you go undersize
you risk deforming the key hole and you will be reminded of this choice every time you change a
bit. You probably have a drill bit that will fit snugly but you will (not might) bend the bit and ruin it
so pick something else or use a dull bit you've been telling yourself to sharpen for the past 10 years.
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Thanks all. I got the chuck off using an impact driver with a hex bit in the jaws and a screwdriver on the motor shaft. I couldn’t get the threaded spacer off, so I just cut down my mortising bit. Once I cleaned and lubed the chuck, the runout is only about .005-.007, which works just fine.
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