Best Way to Lock a Screw

What make and model is the drill motor?

have you tried a impact screwdriver?

That's a fairly common method of securing a drill chuck as shown in this video.

Ryobi does this

It had been over 30 years since I repaired a drill, and in the '70's there was no internal screw. I never had one of those older ones to loosen, but evidently someone did and a very smart solution was found. That's progress!

Like the new washing machines that are so easy to take apart and service. No "wig-wag", all done with a single transmission, which in and of itself is an amazing piece of engineering. And the new ones only weigh about half as much as the old ones.

I only repair my own now, and I buy commercial grade, like the laundromats use. They last longer and are basically trouble free(Knock on wood)

How often do you buy a Washing machine ? The last one i bought (Domestic appliance, not commercial) was in 2002 and its still running mechanically perfect today, only fault is somewhere on the PCB where one program no longer functions but I rarely use that program so it's no big deal not having it.
I guess that a washing machine's lifetime is inherent with the usage. The EU is trying to get White Goods manufacturers to use higher spec components to extend useful life and not use parts that will become obselete or have no replacement.

And one time owners manuals on cars would tell you had how to time the engine or adjust the valve clearances.

now the manuals tell you not to drink the battery fluid.

kinda tells you where the level intellectual regression has come.

We're still using the Maytag washer and dryer that we purchased in 1989. No microprocessors, no inverter drives, and for that matter, no circuit boards. All done with push-button switches and motor-timer cam-switches. There might be a relay or two lurking around in there somewhere. Properly designed and manufactured electro-mechanical stuff just works. And lasts.

I did have to replace the transmission/gearbox in the washer about ten years back and a dry-rotted rubber hose that started to leak. And the belt for good measure, but honestly, the old one looked fine. But after raising four kids on those machines, they served us well and continue to do so.

About the same time, one of the heating elements in the electric dryer broke. And I replaced a couple of squeaky drum rollers, the cork glides at the front, and again I replaced the belt that probably didn't have to be replaced, but for an extra six bucks, I would have been a fool not to replace it.

Of course, being an engineer, when I had the dryer all apart, I couldn't help myself but to insulate the top and side panels of the dryer with 12.7 mm thick foil-covered polyisocyanurate insulation. That way the lost heat from the drum would be retained to ever so slightly improve the dryer's efficiency but more so not to heat the house unnecessarily in the warmer months. The metal panels are now cool to the touch throughout the dryer cycle.

@Brave Sir Robin; you wrote "that way the lost heat from the drum would be retained to ever so slightly improve the dryer's efficiency but more so not to heat the house unnecessarily in the warmer months."
Why would you want to use the dryer in the warmer months instead of simply hanging your laundry out to dry in the warm air.?

Not a fan of bird droppings on my clothes.

Plus, line dried clothes often feel like they've been ironed and starched.

My mom used to line dry clothes with six kids and when money was tight.

Tumble drying is one of my few guilty pleasures. I pinch the pennies in plenty of other places.

Frugal