Steve,
I have heard that before tho about the helical beam couplers even if
they are stainless steel it can break. Honestly I never really cared for
oldhams but do they make ones for this application with differing sized
bores and with the ability to stand up to the approx 9.5 NM torque and a
dirty environment generally? I would imagine that they might be cheaper
as well since their design is simpler supposedly. I just want a zero
backlash solution that will stand up to the abuse for a LONG time... peace
Pete
On Thu, Feb 14, 2013 at 6:02 PM, Steve Blackmore <[email protected]> wrote:
> On Thu, 14 Feb 2013 11:53:33 -0500, you wrote:
>
> >I like oldham couplers the best. If you have a run-away, the only thing
> that breaks is the disk. Yes.. they can wear out if you have a bad a major
> misalignment.. but, in general
> >they last a long time. The also are easier to install because you can
> install each hub on the shafts and then just insert the motor.. you don't
> have to try to undo the hub if you
> >need to remove the motor. I like them better than love-joy or spider
> type too because those have a bit of give in them. Helical or Beam couplers
> are nice for Routers, but, on
> >this sized machine, you would need to use stainless steel ones, and not
> aluminium, AND, you might still have windup issues..
>
> I won't use helical beam couplings on anything. As said previously -
> they snap all too easily and if you have any backlash, they wind up and
> you may never get the full linear movement if there is any resistance.
>
> I snapped one on my router in less than 5 minutes and threw that and the
> other two in the scrap :)
>
> I too like Oldham couplings - I've made a few sleeves that fit the
> common coupling OD's - they make initial lining up easy for mounting
> motors or ballscrews. If the alignment is good they last many hundreds
> of hours too.
>
> Steve Blackmore
> --
>
>
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