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Discussion History

Expanding Mandrel

Assembly

Segmented mandrel that expands hydraulically to grip the coil inner diameter. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Expanding Mandrel parts and their functions

4 top-level parts · 7 parts in total · full bill of materials below
Expanding Mandrel parts diagram: 1 mandrel segment, 2 expansion wedge, 3 expansion cylinder, 4 o-ring set. 7 parts in 4 assemblies.
Expanding Mandrel parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Mandrel Segment 4× Mandrel segments
2 Expansion Wedge 1× Expansion wedge
3 Expansion Cylinder 1× Expansion cylinder
4 O-Ring Set 1× Set of elastomer rings seated in grooves to seal static or slow-moving joints against fluid and gas, sized to ISO 3601.

3D model

No 3D model yet. Have a CAD file of this? Add a 3D model — STL renders right on this page; STEP, FreeCAD, and OpenSCAD sources are welcome too (openly licensed, like all 3D models on BOMwiki).

Build & assembly graph

expand / collapse · shared sub-assemblies converge · links to related products · est. labour
product / assembly shared across products atomic part related product

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Bill of materials for Expanding Mandrel

4 top-level lines · 4 rows shown · 7 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Mandrel Segment multi-blanking-line-mandrel-segment 4× 4 · part
2 Expansion Wedge multi-blanking-line-mandrel-wedge 1× 1 · part
3 Expansion Cylinder multi-blanking-line-mandrel-cylinder 1× 1 · part
4 O-Ring Set oring-set 1× 1 · part

Where the expanding mandrel is used

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

Used in 1 assembly

Uncoiler

Sourcing: possible vendors

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
VendorHQSpecialtyMOQLead 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