Anti-backlash slewing bearing/ pinion set-up
Anti-backlash slewing bearing/ pinion set-up
(OP)
I am working on a design for the medical industry, requiring low backlash in my set-up (below 6arcmin).
At this point, the part is rotating on a slewing bearing, with external teeth, 4.5 Module. A pinion cut on the output shaft of a worm gearbox make the rotation possible... but the backlash is too high, and increases over time.
Is it possible to find an antibacklash pinion that could carry 2500 ft.lb (on 1 3/4 width), with a 4.5 module?
What is the biggest module that we can find on antibacklash gears? Everything I saw, was up to 24 pitch,
Any other idea is welcome.
Thanks.
At this point, the part is rotating on a slewing bearing, with external teeth, 4.5 Module. A pinion cut on the output shaft of a worm gearbox make the rotation possible... but the backlash is too high, and increases over time.
Is it possible to find an antibacklash pinion that could carry 2500 ft.lb (on 1 3/4 width), with a 4.5 module?
What is the biggest module that we can find on antibacklash gears? Everything I saw, was up to 24 pitch,
Any other idea is welcome.
Thanks.





RE: Anti-backlash slewing bearing/ pinion set-up
Don
Kansas City
RE: Anti-backlash slewing bearing/ pinion set-up
RE: Anti-backlash slewing bearing/ pinion set-up
Most equipment I've seen including some large scanning and radiological equipment use some type of rotary table or rotary positioner.
RE: Anti-backlash slewing bearing/ pinion set-up
HTD belts and pulley and special hobbed or
shaped gear to mate with the belt.
RE: Anti-backlash slewing bearing/ pinion set-up
I looked already at belt, but the size would never fit in the design.
The gears are made of Hardenned 1045 for the bearing, and 4340 for the pinion.
I forgot to precise yesterday that we have a 1:8 ratio.
Thanks,
David.
RE: Anti-backlash slewing bearing/ pinion set-up
center distance in this design? I cannot imagine
a spring loaded anti backlash pinion able to
take that force. I was certain that your ratio
was high. I assume it is the gear that is wearing
and not the pinion. You might be able to
use another pinion but have it back loading
the gear a small amount or enough to overcome
the backlash problem. I assume you are using
a long addendum pinion design. How hard is the
4340 pinion and the 1045 gear.
RE: Anti-backlash slewing bearing/ pinion set-up