Help! Singer 111w155 stripped / stuck screw

[friquant]

8 minutes ago, matthew123 said:

Friquant, thanks for the heads up about adjusting that clamp screw in back.  I did try that one first, but I ended up with the machine binding before I could get enough lift out of it, so I figured the next step was the stripped screw "C" in question for the eccentric.

The easy way to get even lift between the inner vs outer toe:

1. Release the foot lifter
2. Turn the handwheel forward until the needle point comes down and meets the plane of the throat plate
3. Loosen the screw I pointed to in the photo. (If either presser was airborn, it will now drop to the throat plate)
4. Tighten the screw

[friquant]

14 hours ago, matthew123 said:

 

I posted a pic of the screwdriver in the screw groove.  As you can see, it's not quite tall enough and definitely not thick enough.  I will either search for one or work on filing down a piece of metal to serve as the new driver. 

Do you have any parallel sided screwdrivers? (Hollow ground)

My first set of hollow ground was just whatever I could collect from all the stray screwdriver bit sets. Eventually had a variety of sizes.

[friquant]

19 hours ago, matthew123 said:

Alzilla and Friquant, do you think the impact driver is too much force against the shaft that this all rests on?  I have one of those things but hesitated to use it. 

Depends on how hard you hit it I suppose.

[AlZilla]

19 hours ago, matthew123 said:

Alzilla and Friquant, do you think the impact driver is too much force against the shaft that this all rests on?

I concur, you could conceivably hit it hard enough to bend something. Also, I don't see enough slot for a screwdriver to bite into. I'd get to drilling.

[friquant]

On 9/21/2025 at 2:17 AM, matthew123 said:

I also noticed that screw "D" (which I think is the one people call the worm screw) spins freely, which seems weird. 

Agree this seems weird. How much lift do you have now?

[dikman]

I'm not sure about using an impact driver but the idea of tapping the screw with a hammer is good, sometimes it can loosen a screw just enough to start it moving a bit, then work it back and forth. As for heat if you're using a small pin-point butane torch I doubt if you're going to get it hot enough to affect the hardness.