Double Enveloping Worms and Worm Gears For Indexing Drive
The extra precision double
enveloping worms and worm gears of all sizes can steadily reach grade 3 of
DIN
standard. These double enveloping worm and worms gears have been
successfully used as indexing drive for machine tools that have to cope
with high cutting rates, endure heavy cutting load, and require high
accuracy as well．
This worm set uses a special worm shape in that it partially envelops
the worm gear as viewed in the direction of the worm gear axis. Its big
advantage over the standard worm is much higher load capacity, However,
the worm gear is very complicated to design and produce, and sources for
manufacture are few.
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