ball screws

[TorMec]

hi to all I have to draw a motorized linear axis, it is classic system with screws, snail, bearing supports, guides and skates to the sides.The condition requires a specific design but the components will of course all commercial but regarding the screw and necessary to find one that the right thread on one side and left on the other.this need arises from the fact that the carts mounted on the ospinato two electromandrini

 

[MassiVonWeizen]

Jo found thishttps://www.abssac.co.uk/c/ground+ballscrew/11/#.xbao5-j7mht

 

[MassiVonWeizen]

also one of the beautiful countryhttp://www.garnet.it/viti-a-ricircolo-di-sfere-bidirezionali-rettificate-kss-serie-sd

 

[TorMec]

perfect I would say that it is more accessible. I looked on hiwin skf nsk misumi but nothing.

 

[meccanicamg]

all the builders sell vines its to recirculation of spheres that trapezie half destre and half sinister. Then no one gives you except hiwin. in general you prefer to make separate screws and then joint with rigid joint so also for the exchanges is less problematic. So your heads are self-centered once you gasped the pigeons.

 

[antonio_sc]

in general you prefer to make separate screws and then joint with rigid joint so also for spare parts is less problematic

I also saw you do as you said and use only one motorization instead of two to move two spindle trucks. ..but I always wondered what the advantage was to buy the single double threaded thread (see that they produce). is it a question of economics and/or ease of assembly (engraves)? or is there any technical advantage?

 

[meccanicamg]

If you have a self-centered axis you have an encoder, a motor and once you make the snails you are finished and for all your life continue to position properly.
If each head had its axis, you will have two engines, two encoders, two games to recover etc and therefore costs more.

series screws are only Left or Right. ..that of great production.
craftsmen and small companies of vines build you in long time (3 months) half-drenches and half-drums, almost always for turning and not rolling (so weaker) that are comfortable for those who design the machine, but are a break of bales for maintenance and supplying.
on a 40 mm external screw....recovery you are no 50 mm difference if you do it bi-filetto compared to joining two of opposite propeller....so there is no reasonable recovery of money.

You know how it is... you have to calculate the joint with radial thorns and/or the tabs to be placed between the two screws...and not everyone knows or wants to calculate it, so they take the already made and reached screw.