Slewing System

Assembly

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

Drive that turns the whole mast and boom on the foot socket, limited to roughly 270 deg by the stifflegs.

Direct parts	4
Total parts	39
Used in	1 assembly
Class	Assembly

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Drive that turns the whole mast and boom on the foot socket, limited to roughly 270 deg by the stifflegs. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Slewing System parts and their functions

4 top-level parts · 39 parts in total · full bill of materials below

Slewing System parts diagram: 1 slew drive unit, 2 slew bull wheel, 3 slew brake, 4 slew limit cam. 39 parts in 4 top-level items. — Slewing System 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 Drive Unit 6 parts	1×	Motor and reduction gearbox whose output pinion meshes with the bull wheel.
2	Slew Bull Wheel	1×	Toothed ring around the mast foot the slew pinion drives to rotate the crane.
3	Slew Brake	1×	Brake holding the crane against wind and load swing when parked.
4	Slew Limit Cam	1×	Stops travel before the stifflegs

3D model

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Build & assembly graph

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Bill of materials for Slewing System

4 top-level lines · 14 rows shown · 39 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Slew Drive Unit 6 parts	derrick-crane-slew-drive	1×	1	36	assembly
1.1	Winch Drive Motor 4 parts	derrick-crane-drive-motor	1×	1	25	assembly
1.1.1	Stator Assembly 3 parts + deeper ›	stator-assembly	1×	1	3	assembly
1.1.2	Rotor Assembly 4 parts + deeper ›	rotor-assembly	1×	1	19	assembly
1.1.3	Ball Bearing	ball-bearing	2×	2	·	part
1.1.4	Motor Holding Brake	derrick-crane-motor-brake	1×	1	·	part
1.2	Gearbox Housing	gearbox-housing	1×	1	·	part
1.3	Helical Gear Pair	gear-pair	3×	3	·	part
1.4	Slew Pinion	derrick-crane-slew-pinion	1×	1	·	part
1.5	Ball Bearing	ball-bearing	4×	4	·	part
1.6	Oil Seal	oil-seal	2×	2	·	part
2	Slew Bull Wheel	derrick-crane-slew-bullwheel	1×	1	·	part
3	Slew Brake	derrick-crane-slew-brake	1×	1	·	part
4	Slew Limit Cam	derrick-crane-slew-limit-cam	1×	1	·	part

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Where the slewing system is used

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

Construction & Earthmoving 1 Stiffleg Derrick Crane

Used in 1 assembly

Stiffleg Derrick 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