- Joined
- Sep 29, 2017
- Messages
- 2,251
I feel sort of stupid posting this,because I kind of feel I don't know my own lathe. I have to start by saying I am not a qualified fitter and turner,but qualified automotive machinist so everything I know about lathes and what goes with it is self taught and stealing with my eyes.
That being said,can someone help me with my lathe thread chart. I know how to do basic threads,metric & imperial, and know how to use the chart for that. I have never done ACME thread before so that is something I must still conquer.
This is the chart
First I want to know what does the 45÷2000 & 45÷355 at the top of the chart mean.
What does the symbols in these two rows mean. The funny looking thing with the m and the same thing with the DP. These are marked on the gearbox knobs. I know what the 1" and mm represent,but not those two.
And on the right side of the chart underneath the 45÷355 there is more numbers. Are these coarser threads if you change the gear ratios as symbolized on the left of them or am I wrong about that. Or are they used for cutting ACME threads? Like I said,never done ACME before.
One last thing. There's this plate around the back of the spindle bore,but does not really look like an indexing plate.
This is just the gears at the back.
Can anyone help please.
Michael
That being said,can someone help me with my lathe thread chart. I know how to do basic threads,metric & imperial, and know how to use the chart for that. I have never done ACME thread before so that is something I must still conquer.
This is the chart
First I want to know what does the 45÷2000 & 45÷355 at the top of the chart mean.
What does the symbols in these two rows mean. The funny looking thing with the m and the same thing with the DP. These are marked on the gearbox knobs. I know what the 1" and mm represent,but not those two.
And on the right side of the chart underneath the 45÷355 there is more numbers. Are these coarser threads if you change the gear ratios as symbolized on the left of them or am I wrong about that. Or are they used for cutting ACME threads? Like I said,never done ACME before.
One last thing. There's this plate around the back of the spindle bore,but does not really look like an indexing plate.
This is just the gears at the back.
Can anyone help please.
Michael