G0704 Z axis conversion

[pemko]

Hi.

I got G0704 and want to connect Z axis to steper motor as it shows on attached drawing and encountered a problem, since unable to figure out exact tap size on the end of Z axis as it shows on the attached picture.
According to G 0704 manual thread size should be M16-2 metric. But it's incorrect, because I measured it myself and it showed as M16-1.5 or 5/8-18. Please help me with correct thread size, so I can order Shaft Collar per drawing.
Attached picture was found on the net and I cant find the source anymore.

Thank you.

[SCzEngrgGroup]

Is there a reason you can't simply measure it?? That's the surest way to KNOW what the actual thread on your particular machine is....

Regards,
Ray L.

[jeremy0203]

Well i dont quite see the problem. if you measured it and it is M16x1.5 then i guess it is such. go on ahead with your plans

[pemko]

Correction: I think it is 16-1.5 or 5/8-18, since I cannot measure it. 3 stores I visit were unable to help me to check correct thread size.
So, if someone had to deal with G 0704, please help me to find out thread size. Then I will be able to order necessary parts online.

[SCzEngrgGroup]

There are NO imperial threads on these machines (other than drawbars, and a very few other specific places where interoperability is required), so it will NOT be 5/8-18. If you really want to make sure buy a 16x1.5 nut and see if it fits....

Regards,
Ray L.

[hoss2006]

Correction: I think it is 16-1.5 or 5/8-18, since I cannot measure it. 3 stores I visit were unable to help me to check correct thread size.
So, if someone had to deal with G 0704, please help me to find out thread size. Then I will be able to order necessary parts online.

It's M16x1.5, just pulled my old one out to check.
Hoss

[pemko]

It's M16x1.5, just pulled my old one out to check.
Hoss

Thank you, Hoss.
Do you know, by chance, where I can order Threaded Clamping Shaft Collar M16-1.5? Maybe somewhere in Chicagoland.

[hoss2006]

It's fairly easy to find M16x2.0, mcmaster even carries them but Misumi USA seems to carry the M16x1.5 for $6.38.
Shaft Collars - Threaded I. D., Slit | Mechanical Components for Assembly Automation - Misumi eCatalog part #SCSN16A
Hoss

[Starleper1]

I like the design with the pinch collar. Not sure I've seen that yet.

I would beef up that mounting plate though. Especially if you plan on making it out of aluminum.

[pemko]

It's fairly easy to find M16x2.0, mcmaster even carries them but Misumi USA seems to carry the M16x1.5 for $6.38.
Shaft Collars - Threaded I. D., Slit | Mechanical Components for Assembly Automation - Misumi eCatalog part #SCSN16A
Hoss

Thank you for a good hint, Hoss.
I ordered necessary part from their site and it was delivered quickly.
Thank you for the help.

Stepan.

[hoss2006]

Happy to help, you're welcome.
Hoss