Evening All I have a Hafco AL960b lathe, has been used for turning shafts and bushes and comes with a imperial lead screw 8tpi the thread
chasing dial has32 teeth so 1 complete dial turn equals 4 inches
Cutting Metric threads I leave the split nuts engaged and reverse the motor and have no problems.
I want to cut a 1 1/2 x 8TPI t her in lies my problem every thing is set up correctly. I should be able to engage the thread chasing dial at any graduation . I start the lathe engage the wait till the thread chasing dial gauge come around to any number and engage the half nuts first cut is checked with thread gauge and is good 8 tpi repeat the procedure and the 2nd cut is off .3rd cut is off.
Note the thread chasing dial has 1-8 numbers . have tried all 1 2 3 4 as well as2 4 6 8 to no availe
could leave the half nuts engaged an do it that way but I have a thread chasing dial and I want to use it any help would be most appreciated
PS in Perth W.A Checked with HARE & FORBES Belmont suggested leaving half nuts engaged no use to me
chasing dial has32 teeth so 1 complete dial turn equals 4 inches
Cutting Metric threads I leave the split nuts engaged and reverse the motor and have no problems.
I want to cut a 1 1/2 x 8TPI t her in lies my problem every thing is set up correctly. I should be able to engage the thread chasing dial at any graduation . I start the lathe engage the wait till the thread chasing dial gauge come around to any number and engage the half nuts first cut is checked with thread gauge and is good 8 tpi repeat the procedure and the 2nd cut is off .3rd cut is off.
Note the thread chasing dial has 1-8 numbers . have tried all 1 2 3 4 as well as2 4 6 8 to no availe
could leave the half nuts engaged an do it that way but I have a thread chasing dial and I want to use it any help would be most appreciated
PS in Perth W.A Checked with HARE & FORBES Belmont suggested leaving half nuts engaged no use to me
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