Knuckle Joint

Assembly

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Secondary boom extension with independent hoist capability, allows deep-reach cargo placement.

Direct parts	6
Total parts	7
Used in	1 assembly
Class	Assembly

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Secondary boom extension with independent hoist capability, allows deep-reach cargo placement. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Knuckle Joint parts and their functions

6 top-level parts · 7 parts in total · full bill of materials below

Knuckle Joint parts diagram: 1 knuckle tube, 2 knuckle lift cylinder, 3 knuckle pivot pin, 4 rope block, 5 ball bearing, 6 o-ring set. 7 parts in 6 top-level items. — Knuckle Joint 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	Knuckle Tube	1×	Tapered tube 80–50 mm diameter
2	Knuckle Lift Cylinder	1×	Single hydraulic lift actuator
3	Knuckle Pivot Pin	1×	Roller thrust bearing
4	Rope Block	1×	Fixed sheave for hoist wire
5	Ball Bearing	2×	Knuckle pivot support
6	O-Ring Set	1×	Rod seal for hoist cylinder

3D model

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Build & assembly graph

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Bill of materials for Knuckle Joint

6 top-level lines · 6 rows shown · 7 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Knuckle Tube	knuckle-boom-marine-crane-knuckle-tube	1×	1	·	part
2	Knuckle Lift Cylinder	knuckle-boom-marine-crane-knuckle-hoist-cylinder	1×	1	·	part
3	Knuckle Pivot Pin	knuckle-boom-marine-crane-knuckle-pin	1×	1	·	part
4	Rope Block	knuckle-boom-marine-crane-rope-block	1×	1	·	part
5	Ball Bearing	ball-bearing	2×	2	·	part
6	O-Ring Set	oring-set	1×	1	·	part

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Where the knuckle joint is used

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

Marine 1 Marine Knuckle Boom Crane

Used in 1 assembly

Marine Knuckle Boom 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–$100. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇨🇳Foxconn foxconn.com ↗	Shenzhen, CN	Electronics contract mfg	1,000 pcs	6–10 wks
🇸🇬Flex (Singapore) flex.com ↗	Singapore	Electronics contract mfg	1,000 pcs	6–10 wks
🇮🇳Dixon Technologies dixoninfo.com ↗	Noida, IN	Electronics contract mfg	1,000 pcs	6–10 wks
🇨🇳BYD Electronics bydelectronic.com ↗	Shenzhen, CN	Electronics contract mfg	1,000 pcs	6–10 wks
🇸🇬Venture Corp venture.com.sg ↗	Singapore	Electronics contract mfg	1,000 pcs	6–10 wks