Main Gearbox

Assembly

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Multi-stage reduction gearbox, roughly 90:1.

Direct parts	6
Total parts	37
Used in	1 assembly
Class	Assembly

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Multi-stage reduction gearbox, roughly 90:1. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Main Gearbox parts and their functions

6 top-level parts · 37 parts in total · full bill of materials below

Main Gearbox parts diagram: 1 helical gear pair, 2 planetary reduction stage, 3 gearbox housing, 4 ball bearing, 5 oil seal, 6 gear oil. 37 parts in 6 top-level items. — Main Gearbox parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.

#	Part	Qty	What it does
1	Helical Gear Pair	4×	Two meshing helical gears forming one reduction stage that steps torque up and speed down between parallel shafts with quiet, continuous tooth contact.
2	Planetary Reduction Stage 5 parts	1×	Final planetary gear set.
3	Gearbox Housing	1×	Rigid cast housing that holds the gears and bearings in alignment, contains the lubricant, and mounts the gearbox to the machine.
4	Ball Bearing	12×	Deep-groove radial ball bearing.
5	Oil Seal	6×	Spring-loaded rotary lip seal that keeps lubricant inside a housing and dirt out where a shaft passes through, sized to DIN 3760.
6	Gear Oil	1×	Extreme-pressure lubricant for gearboxes and axles that protects the meshing teeth under high load.

3D model

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Build & assembly graph

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Bill of materials for Main Gearbox

6 top-level lines · 11 rows shown · 37 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Helical Gear Pair	gear-pair	4×	4	·	part
2	Planetary Reduction Stage 5 parts	heavy-lift-helicopter-planetary-stage	1×	1	13	assembly
2.1	Sun Gear	heavy-lift-helicopter-sun-gear	1×	1	·	part
2.2	Planet Gear	heavy-lift-helicopter-planet-gear	5×	5	·	part
2.3	Ring Gear	heavy-lift-helicopter-ring-gear	1×	1	·	part
2.4	Planet Carrier	heavy-lift-helicopter-planet-carrier	1×	1	·	part
2.5	Ball Bearing	ball-bearing	5×	5	·	part
3	Gearbox Housing	gearbox-housing	1×	1	·	part
4	Ball Bearing	ball-bearing	12×	12	·	part
5	Oil Seal	oil-seal	6×	6	·	part
6	Gear Oil	gear-oil	1×	1	·	part

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Where the main gearbox is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Aerospace & Drones 1 Heavy-Lift Helicopter

Used in 1 assembly

Main Transmission

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $1–$300. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇮🇳Sona Comstar sonacomstar.com ↗	Gurugram, IN	EV driveline & motors	1,000 pcs	8–12 wks
🇨🇳Zhejiang Shuanghuan shdrive.cn ↗	Yuhuan, CN	Gears & driveline	1,000 pcs	8–12 wks
🇮🇳Bharat Gears bharatgears.com ↗	Mumbai, IN	Automotive gears	1,000 pcs	8–12 wks
🇮🇳ZF India zf.com ↗	Pune, IN	Driveline & chassis	1,000 pcs	8–12 wks
🇨🇳Hangzhou Advance advancegroup.cn ↗	Hangzhou, CN	Gearboxes	1,000 pcs	8–12 wks