Bottom Bracket

Assembly

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

Sealed-cartridge bottom bracket pressing into the frame shell to support the crank spindle.

Direct parts	3
Total parts	6
Used in	1 assembly
Class	Assembly

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Sealed-cartridge bottom bracket pressing into the frame shell to support the crank spindle. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Bottom Bracket parts and their functions

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

Bottom Bracket parts diagram: 1 ball bearing, 2 bottom bracket cup, 3 bottom bracket spacer. 6 parts in 3 top-level items. — Bottom Bracket 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	Ball Bearing	2×	Deep-groove radial ball bearing.
2	Bottom Bracket Cup	2×	Aluminum cup pressing into the frame shell and seating the cartridge bearing.
3	Bottom Bracket Spacer	2×	Alloy spacer setting chainline and bearing preload across the spindle.

3D model

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Build & assembly graph

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Bill of materials for Bottom Bracket

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

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Ball Bearing	ball-bearing	2×	2	·	part
2	Bottom Bracket Cup	bmx-race-bike-bb-cup	2×	2	·	part
3	Bottom Bracket Spacer	bmx-race-bike-bb-spacer	2×	2	·	part

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Where the bottom bracket is used

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

Bicycles & Cycling 1 BMX Race Bike

Used in 1 assembly

Drivetrain

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