BOMwiki the bill-of-materials encyclopedia
30,441,948 parts mapped · 192,925 items

This page is machine-generated and unverified (what this means). Treat details as provisional. If you know this hardware, weigh in or correct it directly with Edit.

Discussion History

Drafting Unit

Assembly

The three- or four-line roller drafting unit, one per spindle, that pulls the heavy sliver out to roving fineness, with a double-apron middle zone that controls the floating fibers through the long high draft. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Drafting Unit parts and their functions

7 top-level parts · 22 parts in total · full bill of materials below
Drafting Unit parts diagram: 1 bottom drafting roller, 2 top pressure roller, 3 double apron pair, 4 fiber condenser, 5 roller weighting arm, 6 helical gear pair, 7 ball bearing. 22 parts in 7 top-level items.
Drafting Unit parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Bottom Drafting Roller 4× Bottom drafting rollers
2 Top Pressure Roller 4× Top pressure rollers
3 Double Apron Pair 1× Double apron pair
4 Fiber Condenser 2× Fiber condensers
5 Roller Weighting Arm 1× Roller weighting arm
6 Helical Gear Pair 2× Roller drive gears
7 Ball Bearing 8× Roller bearings

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

Tap an assembly to expand/collapse · tap a part to open it · use “Open page” for any node · drag to pan, scroll to zoom.

Bill of materials for Drafting Unit

7 top-level lines · 7 rows shown · 22 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Bottom Drafting Roller roving-frame-bottom-roller 4× 4 · part
2 Top Pressure Roller roving-frame-top-roller 4× 4 · part
3 Double Apron Pair roving-frame-apron-pair 1× 1 · part
4 Fiber Condenser roving-frame-condenser 2× 2 · part
5 Roller Weighting Arm roving-frame-weighting-arm 1× 1 · part
6 Helical Gear Pair gear-pair 2× 2 · part
7 Ball Bearing ball-bearing 8× 8 · part

Where the drafting unit is used

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

Used in 1 assembly

Roving Frame

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
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