Hobbymat BFE65 Leadscrew info, fitting anti backlash nuts
Hi all
I run a HOBBYMAT BFE65 vertical milling machine c.1984. I am looking to fit anti backlash nuts, but i seem to have hit a problem, Does anyone in CNC land know exactly what the Lead-screws are? i have measured them at 14 mm outside diameter, single start with a 2 mm pitch per single evolution, the problem is i am having difficulty finding out if they are ACME, METRIC or TRAPEZOIDAL, and i can only find 3 mm pitch on the internet (TR14 3)
Any help on this subject would be very helpful.
Regards
Ray
Re: Hobbymat BFE65 Leadscrew info, fitting anti backlash nuts
Ray did you ever get an answer to this?
.Me
Re: Hobbymat BFE65 Leadscrew info, fitting anti backlash nuts
Quote:
Originally Posted by
Lee Roberts
Ray did you ever get an answer to this?
.Me
Hi.
No i did not.
Ray
Re: Hobbymat BFE65 Leadscrew info, fitting anti backlash nuts
If the pitch is metric the leadscrew is Trapazoidal(Trapazoidal is the metric version of Acme)
Not all the pitches are show on the charts i had a look @. I was looking for data for turning an M8 x 2 leadscrew and couldn't find it,fortunatelly i have a tap and will make the nut first and leadscrew to suit.
Mike
Re: Hobbymat BFE65 Leadscrew info, fitting anti backlash nuts
Many Thanks Mick.
I have not fitted backlash nuts yet, but this info will be valuable for the future.
Regards
Ray
Re: Hobbymat BFE65 Leadscrew info, fitting anti backlash nuts
Hi Ray,
Why not replacing the leadscrew all together with a known diameter / pitch?
Trapezoidal screws are fairly cheap these days.
RNR
Re: Hobbymat BFE65 Leadscrew info, fitting anti backlash nuts
It's all well and good doing that but as a rule there's an indicator dial on the end of it so you need to make a new one. i am replacing a 1mm pitch screw so bought 2mm pitch tap so can go off half a division of dial. As it's for the topslide it only gets used for doing facing cuts and infeed when screw cutting. you could get a 4mm screw and do the same.
Mike