Rotating Ballnut - design ideas

[Clive S]

Boyan the zip file does not work for me. It might be the spaces in it!!

[mekanik]

+1 on that
invalid attachment.
Mike

[Boyan Silyavski]

Re-uploaded the Zip file

[njhussey]

Works fine now

[mutzy]

Hello to all. I need some advice. I finally got back to tackling the rotating ballnut. After drawing on turbocad the htd gears on th shaft that fits into the bearing box/block(Shaft with gears machined on it with head piece that attaches to the ballnut) I realized that the 7207 2rs bearings will not fit over the machined gears or the large round headpiece that attaches to the ballnut. If I just find a larger ID like 47 or 50 angular contact bearing with 80 or 90 OD, can I substitute it? Of course I'll make the bearing box accomodate it. Thanks Mutzy

[Boyan Silyavski]

Hello to all. I need some advice. I finally got back to tackling the rotating ballnut. After drawing on turbocad the htd gears on th shaft that fits into the bearing box/block(Shaft with gears machined on it with head piece that attaches to the ballnut) I realized that the 7207 2rs bearings will not fit over the machined gears or the large round headpiece that attaches to the ballnut. If I just find a larger ID like 47 or 50 angular contact bearing with 80 or 90 OD, can I substitute it? Of course I'll make the bearing box accomodate it. Thanks Mutzy

Hows that will not fit? Over no, but there is a sequence of pressing the parts together. That's why the pulley is bored from a separate pulley and then pressed together. if you machine right on shaft, then you will have to machine a smaller pulley so the bearing passes on top of it. But then the ball screwe size pass trough hole, so you will have to check if that's at all possible. I believe it was possible but not sure now. Have to check

[mutzy]

Can't I just get a larger ID bearing for near the machined on gears to compensate for this?