Duplex Worm Gear Wheels
Duplex Worm Gear Wheels
Besides the above explained duplex method, there are various possibilities to adjust the backlash of worm gears:
variation of center distance, by rotating an eccentric hub, in which the worm shaft and/or the worm gear wheel are cradled
axial shifting of a conical worm
division of the worm in two halves , to be rotated or shifted relatively to each other. (system Ott)
division of the wheel in two disks , to be rotated relatively to each other.
However all these methods demonstrate substantial disadvantages:
adjustments and/or readjustments are interfering with the geometrically accurate meshing.
they shift the contact profile zone and change its form and size.
with this they decrease the load-carrying capacity and deteriorate the efficiency.
each adjustment causes a tremendous amount of start-up wear.
the dangers of wrong assembly and destruction of the worm gear set are tremendous.
part of a duplex worm shaft in a rotary table
Duplex gearings do not create these kind of problems.
They permit an always geometrically accurate teeth contact and beyond that, very delicate backlash adjustment. Neither the evolved contact area, the load-carrying capacity nor the actual efficiency are affected. In addition as duplex teeth are executed as involute gear they are insensitive in regards to modifications of the center distance, e.g. caused by worm shaft deflections.
Specifications
Precision grade grade 1
Reference
section of gear Rotating plane
Gear teeth Standard full depth
Normal
pressure angle 17° 30'
Material CAC702
Duplex worms and worm wheels must be mated in a predetermined orientation, which is indicated by the arrows.
Therefore, the arrow on the wheel does not indicate the mounting direction, but the rotating direction.
Product Quick Detail:
- Standard and non-standard available
- With high quality and competitive price
- Prompt delivery
- Packing as per customer’s demand.
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Most of our products are exported to Europe or Americas, both standard and nonstandard products available. We can produce as per your drawing or sample. Material can be standard or as per your special request. If you choose us, you choose reliable.
Materials Available
1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20
3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)
4. Bronze: C51000, C52100, C54400, etc
5. Iron: 1213, 12L14,1215
6. Aluminum: Al6061, Al6063
7.OEM according to your request
Surface Treatment
Annealing, natural canonization, heat treatment, polishing, nickel plating, chrome plating, zinc plating,yellow passivization, gold passivization, satin, Black surface painted etc.
Processing Method
CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly
QC & Certificate
Technicians self-check in production,final-check before package by professional Quality inspector
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009
Package & Lead Time
Size: Drawings
Wooden Case/Container and pallet, or as per customized specifications.
15-25days samples. 30-45days offcial order
Port: Shanghai/Ningbo port