The Home Machinist!

Steve writes: > Level is just the most convenient substitute for ensuring that both ends of the bed are in the same plane. > I've looked at a lathe, put the level on, took a reading and then checked that the off-level reading was the > same at the other end. A level is a nulling instrument. Due to s...

Less rake than for mild steel, but in my experience cast iron machines easily and gives a good finish. Photos of the finish and of your cutter?

If you require a certain level of precision, you buy that and pay the price. If your lathe has never been leveled, the precision of this level is better than any guess. You decide if the price for this level matches its presumed level of precision. A lathe needs to be flat, not level. Leveling is j...

stephenc wrote: ↑Sun Feb 18, 2018 7:42 pm I'm sure it could be saved with some work , but I'd say at this point it is a project and not a precision tool .

How can you tell anything from those pictures?

Post to "Site Software Questions and Answers". Something is broken. I've seen other recent posts with multiple attachments.

The worm drive reduction ratio is 6:1 (followed by a 4:1 spur gear pair). According to my research that means that the worm drive should be about 90% efficient. The whole gearbox is about twice the size of 1.25hp 2500rpm 7.5:1 worm drives found in various catalogs. Load power won't exceed 400 watts ...

According to my research worms need ISO 680. SAE 75 gear oil is about 46 ISO.

I'm building a power hacksaw. I scored a very nice 24:1 combination worm/spur reduction gear at the local university surplus store for $1.00 (had to make a cover and an input shaft adapter) but it's an unlabeled (and unused) spare part. I know I can buy worm gear oil by the gallon for ridiculous pri...

The transient torque when starting a three-phase induction across the line from zero speed can be as high as three times the pullout torque.

https://www.researchgate.net/publicatio ... ion_Motors

I put a small amount of antisieze on the outsides of my collets and wipe the insides with acetone. Note that acetone can be nearly as dangerous as gasoline, though. If you are going work with open containers of it do so outside on the ground so that you can't dump the container onto your clothing. B...

I assumed that by "slipping" you meant that the wheel was changing its position slightly, not that the adapter was actually spinning in the wheel.