Originally Posted by solarchimesam GER21,
IFirst question
Is a right hand thread a standard thread type?. |
Yes.
Second question
What does number of starts mean?.
|
If you look at a threaded rod from the side where you'll put the nut on you'll see an entry to the thread. Normally you'll see one entry or one start. It's easier to make and almost all of the screws you’ll buy at the hardware store are like that.
Now lets take a ½” shaft and make a thread of one inch per turn. You’ll have very little "groove" and a lot of “not groove”. To remedy it you can put an other thread at 180° offset and with the same pitch an now you’ll have more "grove" per inch and a two start screw. If you’ll make the offset 120° you’ll have a three start screw. An offset of 90° will be a four start screw.
If I’m wrong of what I’ve said then just ignore it. :-)
Sheesh... took me that long to type that somebody else beat me to it.:-)