Thread cutting question. Harbor Freight mini needs to cut 1.5 metric thread (16.9TPI)

[Steve--]

I have a 7" x 12" Harbor Freight min metal lathe. This was obviously purchased in the U.S., with a 16 TPI lead screw.

I want to cut 1.5 pitch metric threads (16.9 TPI) on a 12mm bicycle axle. I need some help on how to accomplish this with this machine. Can it be accomplished with my stock gearing? If not, can someone tell me what replacement gears I'll need, and where I can purchase them?

Thanks so much
Steve

 

[Newman109]

Discussion of small machines from H.F. or other non-professional machines are not permitted here.

That said, you might want a die and handle for that job.

 

[basalt]

Google "Gear Calculator" - here is one,
Change Gears for Threading - LittleMachineShop.com
You will be single point threading, see Youtube for instructions.

 

[john.k]

If you have an "inch" leadscrew ,then you need a metric transposing gear set ....which can be 100/127,83/69 or probably smaller gears to suit the mini lathe.

 

[Steve--]

Discussion of small machines from H.F. or other non-professional machines are not permitted here.

Is that a joke? If not, what specific factors determine whether a machine is professional or not? Is not the degree of professional nature purely subjective?

 

[neanderthal mach]

No it's not a joke and had you done what you should have and actually read the rules and especially this one, Machinery Discussion Guidelines you'd already know what is and isn't allowed.

 

[PDW]

Is that a joke? If not, what specific factors determine whether a machine is professional or not? Is not the degree of professional nature purely subjective?

No it's not a joke - we don't want to read about those POS machines.

As for the basis for it, the forum owner/moderator made the rules and SO IT SHALL BE!

There are many other forums out there, discussion of those POS things always leads to shit-fights and we can do enough of those already.

Sorry but you're not going to get any sympathy or support in changing those rules. We like them.

PDW