Track Descent System

Assembly

Green Printed Circuit Board and Components.JPG · Commons ↗ Report photo

Pair of rubber belt tracks that bridge the stair nosings so the chair slides down on a continuous surface instead of dropping step to step.

Direct parts	6
Total parts	22
Used in	1 assembly
Class	Assembly

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Pair of rubber belt tracks that bridge the stair nosings so the chair slides down on a continuous surface instead of dropping step to step. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Track Descent System parts and their functions

6 top-level parts · 22 parts in total · full bill of materials below

Track Descent System parts diagram: 1 track belt, 2 track frame, 3 track roller, 4 belt tension axle, 5 track deploy linkage, 6 ball bearing. 22 parts in 6 top-level items. — Track Descent System 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	Track Belt	2×	Reinforced V-grooved rubber belt whose friction against stair nosings sets the baseline descent resistance.
2	Track Frame	1×	Aluminum sub-frame holding both belts at the correct angle of attack to the stair pitch.
3	Track Roller	8×	Belt support rollers
4	Belt Tension Axle	2×	Adjustable axle keeping each belt tensioned so it cannot slip on its drive surface.
5	Track Deploy Linkage	1×	Swings tracks down for stairs
6	Ball Bearing	8×	Roller bearings

3D model

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Build & assembly graph

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Bill of materials for Track Descent System

6 top-level lines · 6 rows shown · 22 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Track Belt	evacuation-chair-track-belt	2×	2	·	part
2	Track Frame	evacuation-chair-track-frame	1×	1	·	part
3	Track Roller	evacuation-chair-track-roller	8×	8	·	part
4	Belt Tension Axle	evacuation-chair-tension-axle	2×	2	·	part
5	Track Deploy Linkage	evacuation-chair-deploy-linkage	1×	1	·	part
6	Ball Bearing	ball-bearing	8×	8	·	part

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Where the track descent system is used

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

Firefighting & Emergency 1 Evacuation Chair

Used in 1 assembly

Evacuation Chair

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 $1–$200. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇨🇳JLCPCB jlcpcb.com ↗	Shenzhen, CN	PCB fabrication	100 pcs	2–4 wks
🇨🇳PCBWay pcbway.com ↗	Shenzhen, CN	PCB fab & assembly	100 pcs	2–4 wks
🇨🇳Shennan Circuits scc.com.cn ↗	Shenzhen, CN	PCB manufacturer	100 pcs	2–4 wks
🇮🇳Shogini Technoarts shogini.com ↗	Mumbai, IN	PCB manufacturer	100 pcs	2–4 wks
🇸🇬Venture Corp venture.com.sg ↗	Singapore	Electronics contract mfg	100 pcs	2–4 wks