Upper Structure

Assembly

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

Rotating platform on the slew bearing, carrying engine and cab.

Direct parts	15
Total parts	1,694
Used in	1 assembly
Class	Assembly

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Rotating platform on the slew bearing, carrying engine and cab. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Upper Structure parts and their functions

15 top-level parts · 1,694 parts in total · full bill of materials below

Upper Structure parts diagram: 1 rotating frame, 2 swing bearing (slew ring), 3 swing drive, 4 counterweight, 5 slew ring bolt, 6 cover & hood panel, 7 hinge & latch, 8 handrail & step, 9 mirror, 10 camera, 11 battery box & toolbox, 12 counterweight bolt, 13 hex bolt, 14 hex nut, 15 washer. 1,694 parts in 15 top-level items. — Upper Structure 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	Rotating Frame	1×
2	Swing Bearing (Slew Ring)	1×	Slew ring
3	Swing Drive 5 parts	1×	Swing motor + gearbox
4	Counterweight	1×	Cast iron
5	Slew Ring Bolt	72×	High-strength bolt fastening the swing bearing to the upper and lower frames.
6	Cover & Hood Panel	14×	Sheet-steel engine hood, side door or cover panel on the upper structure.
7	Hinge & Latch	36×	Hinge, gas strut or latch on a hood, door or cover.
8	Handrail & Step	8×	Access step, handrail or anti-slip plate on the upper structure.
9	Mirror	3×	Convex rear or side mirror.
10	Camera	2×	Rear or side-view camera feeding the cab monitor.
11	Battery Box & Toolbox	1×	Lockable compartment for the batteries and tools.
12	Counterweight Bolt	8×	Large bolt fastening the counterweight to the frame.
13	Hex Bolt	700×	Flanged hex bolt, M8 to M24, used throughout the structure, covers and equipment mounts.
14	Hex Nut	420×	Flanged or nyloc hex nut mating the bolts.
15	Washer	420×	Flat or spring washer under bolt heads and nuts.

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Build & assembly graph

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Bill of materials for Upper Structure

15 top-level lines · 20 rows shown · 1,694 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Rotating Frame	excavator-rotating-frame	1×	1	·	part
2	Swing Bearing (Slew Ring)	excavator-swing-bearing	1×	1	·	part
3	Swing Drive 5 parts	excavator-swing-drive	1×	1	7	assembly
3.1	Swing Motor	excavator-swing-motor	1×	1	·	part
3.2	Helical Gear Pair	gear-pair	2×	2	·	part
3.3	Gearbox Housing	gearbox-housing	1×	1	·	part
3.4	Oil Seal	oil-seal	1×	1	·	part
3.5	Ball Bearing	ball-bearing	2×	2	·	part
4	Counterweight	excavator-counterweight	1×	1	·	part
5	Slew Ring Bolt	excavator-swing-bearing-bolt	72×	72	·	part
6	Cover & Hood Panel	excavator-cover-panel	14×	14	·	part
7	Hinge & Latch	excavator-hinge-latch	36×	36	·	part
8	Handrail & Step	excavator-handrail	8×	8	·	part
9	Mirror	excavator-mirror	3×	3	·	part
10	Camera	excavator-camera	2×	2	·	part
11	Battery Box & Toolbox	excavator-battery-box	1×	1	·	part
12	Counterweight Bolt	excavator-counterweight-bolt	8×	8	·	part
13	Hex Bolt	excavator-hex-bolt	700×	700	·	part
14	Hex Nut	excavator-hex-nut	420×	420	·	part
15	Washer	excavator-washer	420×	420	·	part

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Where the upper structure is used

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

Construction & Earthmoving 1 Excavator

Used in 1 assembly

Excavator

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