Slewing Unit

Assembly

Aluminium melting crucible casting process.jpg · Commons ↗ Report photo

Slew ring, drives and platform letting the upper works rotate on the mast.

Direct parts	3
Total parts	140
Used in	1 assembly
Class	Assembly

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Slew ring, drives and platform letting the upper works rotate on the mast. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Slewing Unit parts and their functions

3 top-level parts · 140 parts in total · full bill of materials below

Slewing Unit parts diagram: 1 slew ring bearing, 2 slewing drive, 3 slewing platform. 140 parts in 3 top-level items. — Slewing Unit 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	Slew Ring Bearing 3 parts	1×	Large-diameter geared slewing bearing carrying the rotating superstructure.
2	Slewing Drive 6 parts	2×	Motor and gearbox rotating the crane via the slew ring.
3	Slewing Platform	1×	Turntable deck mounting the jib, counter-jib and cab.

3D model

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Build & assembly graph

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Bill of materials for Slewing Unit

3 top-level lines · 19 rows shown · 140 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Slew Ring Bearing 3 parts	tower-crane-slew-ring	1×	1	83	assembly
1.1	Slew Ring Gear	tower-crane-slew-ring-gear	1×	1	·	part
1.2	Ball Bearing	ball-bearing	80×	80	·	part
1.3	Oil Seal	oil-seal	2×	2	·	part
2	Slewing Drive 6 parts	tower-crane-slew-drive	2×	2	28	assembly
2.1	Stator Assembly 3 parts	stator-assembly	1×	2	3	assembly
2.1.1	Stator Core (laminations)	stator-core	1×	2	·	part
2.1.2	Copper Winding	copper-winding	1×	2	·	part
2.1.3	Slot Insulation	stator-insulation	1×	2	·	part
2.2	Rotor Assembly 4 parts	rotor-assembly	1×	2	19	assembly
2.2.1	Rotor Shaft	rotor-shaft	1×	2	·	part
2.2.2	Rotor Core	rotor-core	1×	2	·	part
2.2.3	Neodymium Magnet	neodymium-magnet	16×	32	·	part
2.2.4	Ball Bearing	ball-bearing	1×	2	·	part
2.3	Motor Housing	motor-housing	1×	2	·	part
2.4	Gearbox Housing	gearbox-housing	1×	2	·	part
2.5	Helical Gear Pair	gear-pair	3×	6	·	part
2.6	Encoder	encoder	1×	2	·	part
3	Slewing Platform	tower-crane-slew-platform	1×	1	·	part

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Where the slewing unit is used

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

Construction & Earthmoving 1 Tower Crane

Used in 1 assembly

Tower Crane

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 $0.50–$200. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇮🇳Bharat Forge bharatforge.com ↗	Pune, IN	Forgings & metal parts	500 pcs	6–10 wks
🇨🇳CITIC Dicastal dicastal.com ↗	Qinhuangdao, CN	Aluminium castings & wheels	500 pcs	6–10 wks
🇮🇳Tata AutoComp tataautocomp.com ↗	Pune, IN	Auto components	500 pcs	6–10 wks
🇸🇬Beyonics beyonics.com ↗	Singapore	Precision metal & mfg	500 pcs	6–10 wks
🇮🇳Sundaram Clayton sundaram-clayton.com ↗	Chennai, IN	Die castings	500 pcs	6–10 wks