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Steel Underframe

Assembly

Riveted/welded steel center-sill underframe carrying body and draft loads to the trucks, with bolsters, draft sills, and end platforms. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Steel Underframe parts and their functions

6 top-level parts · 17 parts in total · full bill of materials below
Steel Underframe parts diagram: 1 center sill, 2 body bolster, 3 draft sill & pocket, 4 end platform, 5 grab iron, 6 fastener set. 17 parts in 6 top-level items.
Steel Underframe parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Center Sill 1× Longitudinal steel beam running the car length, taking buffing and draft forces.
2 Body Bolster 2× Body bolsters over trucks
3 Draft Sill & Pocket 2× Draft pockets
4 End Platform 2× End platforms
5 Grab Iron 8× Grab irons
6 Fastener Set 2× Bolts, nuts, and washers.

3D model

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Build & assembly graph

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Bill of materials for Steel Underframe

6 top-level lines · 6 rows shown · 17 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Center Sill caboose-center-sill 1× 1 · part
2 Body Bolster caboose-body-bolster 2× 2 · part
3 Draft Sill & Pocket caboose-draft-sill 2× 2 · part
4 End Platform caboose-platform 2× 2 · part
5 Grab Iron caboose-grab-iron 8× 8 · part
6 Fastener Set fastener-set 2× 2 · part

Where the steel underframe is used

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

Used in 1 assembly

Caboose

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
VendorHQSpecialtyMOQLead 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