The Home Machinist!

I have two a 100VA and a 500VA I have needed to used them about 4 times in the last 15 years and do not recall the specific. If you want one get one, on the other hand you may spend the next decades without needing one. Sometime a simple dimmer can do the job, like when converting an espresso maker ...

Just a stab. The current controls the torque. So you control one motor and sense the current. Then make a feedback loop that "tweaks" the second controller (the pot or the reference) to "mirror" the current. The loop sense the error between the 2 current sensor outputs and react to adjust one motor ...

For now, I am looking ahead since I have not come to that part of the construction yet. It may be some time until I will tackle and document the process. Perhaps the choice of stainless was wrong, brass would have been a better choice since this part has no demanding functional requirement other tha...

followed by rapid air cooling. Can you expand on that? Steel is normally annealed by slow cooling. Brass can be allowed to cool slowly, speeding up cooling is only for convenience. All the welding capability I have is silver brazing and flux core which it usually turns out looking like solidified v...

I need to make a tapered chimney and plan to start with a seamless tube, cut out a triangular slit and coerce the rest into a tapered "round" tube.
I need not to spring back too much.
4" Long Small OD=0.825" Big OD=1.062 Wall=0.04

Rereading your post and visualizing the set up. The tops I spun as a child were running all over the floor. An 11 lbs disk spinning 15KRPM under vacuum is not something you want to have running around so I assume you have some requirement to keep the thing in one location. That may be a factor in ch...

Theoretically means nothing. The intersection of plane and sphere has zero area just like a cone intersecting a plane. so theoretically the pressure is infinite and the object deform until a certain contact area is reached to lower the load below the breaking stress. Now try to visualize the indenta...

Separate the control "smart" of the circuit from the "muscle" the power handling of the circuit.
Select the best delay relay for the job, then drive a contactor to control the motor.

Thanks all, you gave some points I did not consider. Galling and the fact that a steeper angle gradually converts the clutch from a conical type to a disk type changing the the distribution of radial and axial forces.

I am building a model tractor. The plan call for a clutch Brass to Steel 1" diameter 5/32" thickness (width) The plan specify a single side angle of 20 degrees (40 Included) I think the angle is too steep, thinking it should be a releasing type coupling but just barely, I am inclined to make it 10 d...

First saw before you mill Second consider drilling as the faster cheaper metal removal method Third use a roughing end mill Carbide is about mandatory for steel on the X3 mill Fourth do not even think of climb milling when roughing I have the same mill and it does not like much side cutting, is a li...

Two tilt table multiply the set up complexity. Same angle, same X same Y both parallel to the T slots.