Welcome to the forum Dave.
I upgraded from a brushed motor mini-lathe to a Warco WM280. The mini-lathe I judged usable inside the house, the WM280 needs to be in a workshop.
Mini-lathes typically have plastic gears which are much quieter than metal, and they aren't fitted with cooling fans. My WM280 has one continually cooling the motor, and another cooling the VFD. I could listen to the radio whilst mini-lathing, not possible on the big machine without cranking the radio up to full-volume. (I could upgrade to better fans, the computer type fan on the electronics is too cheap!)
Mini-lathes are silent until the motor is started and only slightly noisy until cutting starts. As for cutting noise, Jeff Dayman's post says it all! It depends on what you're doing. Most cutting, drilling, and boring is fairly quiet (able to listen to radio), but some operations are intrinsically loud.
Learning to drive a lathe involves making more noise than usual. Cutters chatter when the operator sets the machine up incorrectly; rpm wrong, depth-of-cut wrong, feed-rate wrong, blunt tool or difficult material. If these mistakes are made on a bell-shaped object like a brake-drum, a good deal of motor power is converted into unpleasant screeching. The operator should stop! Early efforts are more likely to be noisy than later work.
Anyone out there upgraded from a mini-lathe to a WM180, who can comment on noise? The bigger machine has noisier steel gears, but I don't know what the fans are like, or even if the lathe has any?
By the way, don't let the SC3's toy-like appearance put you off. If plastic handles get your goat, use the lathe to make replacements! (Trust me, metal handles aren't worth the bother except as a way of gaining experience.)
Although mini-lathes have shortcomings, the main problem for me was mine wasn't big enough! However, I learned all the basics from it, had fun, and used it a lot. Took a few years to realise it was too small for my ambitions, but I think 50% of what I do now could be done with a mini-lathe. I regret not keeping it occasionally because they're better for tiny work than a big machine. Reasons for upgrading apart from size:
- Awkward Change Gear banjo compared with bigger machines.
- Cross-slide and tool-post are lightly built, reducing rigidity.
- No slots on the saddle making it impossible to mount a rear tool post or work on it.
- Small dials.
- Replacing the two-speed gear inside the headstock is a pain because bearings have to be removed. Teeth strip if you crash the tool post into the chuck. Don't ask how I know!
Dave