Shopsmith Forums

Sorry in advance for not completely knowing the part names... New to a lot of this. I noticed there's about an eight of an inch of play between the silver collar and the motor output shaft and the quill. When I start up the motor, the blade likes to kick out to the end play and when measuring it gets pushed against the quill.

My intuition says this isn't normal, anyone have ideas on how to fix this?

I put two images in the two different ends of the movement:
https://imgur.com/JazXpl7
https://imgur.com/2GvCy7f

That's excessive. Loosen the set screw on the silver knurled knob and, while pulling on the quill, push the knurled knob back as far as possibleand re-tighten the set screw (it kind of helps to have three hands to do that maneuver).

Is the set screw covered by some kind of putty/filler right where the flat spot is on the output shaft? I see some kind of filling on the quill set screw and some others so I am just guessing it's the same.

Yes, dig out that putty with a pen knife or other object.

algale wrote:Yes, dig out that putty with a pen knife or other object.

Don't you mean the set screw in the silver Knob? (no putty there) I thought the putty filled one was for removing the quill... I'm usually wrong though!

There's putty in both places (or at least there can be). Yes, we are talking about the silver knurled knob set screw.

There are three set screws obscured by putty when 'they' leave the factory(the first time).

One secures the quill advance housing. It is located at the top of the quill return spring housing.

Another prevents the quill from falling out of the headstock if the quill is advanced too far. It is located on the top of the headstock. It is a half dog set screw that rides in a groove at the 'top' of the quill.

The third(the one relevant to this thread) is in the knurled collar on the end of the quill shaft. It takes out any play between the shaft and the bearing. It seats on a second/smaller tapered flat inboard from the arbor taper flat.

They are filled with putty to prevent 'inadvertent' loosening. The putty must be dug out when loosening the set screws is intentional for 'servicing'.

ChrisNeilan wrote:

algale wrote:Yes, dig out that putty with a pen knife or other object.

Don't you mean the set screw in the silver Knob? (no putty there) I thought the putty filled one was for removing the quill... I'm usually wrong though!

Whether there is/was putty on the three set screws that have been mentioned seems to be a matter of chance. There was putty on two of mine. The two set screws related to the quill had putty but the one in the silver knurled know did not.

I had an opportunity to visit with a new Mark 7 user recently and noticed that none of the set screws in question were concealed by putty.

The putty has been removed and never replaced in all locations on the two machines that I have. I have never had a problem caused by any of those set screws coming loose. I don't know for sure why it is there but I doubt that the reason is really functionality. Overly cautious maybe.

I tend to think the putty is there to prevent tinkering by the uninformed. If you gorilla the quill set screw you're going to have problems.

If the original filler is still in the screw hole of the knurled knob I am suspicious of the quill bearing.
Bill V