BOMwiki the bill-of-materials encyclopedia
30,454,201 parts mapped · 193,225 items
Discussion History

Film Transport

Assembly

Mechanism that advances the film exactly one 38 mm frame pitch per stroke, cocks the shutter, counts frames, and rewinds the roll into its cassette. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Film Transport parts and their functions

6 top-level parts · 6 parts in total · full bill of materials below
Film Transport parts diagram: 1 film advance lever, 2 sprocket shaft, 3 take-up spool, 4 frame counter, 5 rewind crank, 6 helical gear pair. 6 parts in 6 top-level items.
Film Transport parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Film Advance Lever 1× Thumb lever with about a 130° throw that drives the transport gearing and shutter-cocking shaft in a single ratcheted stroke.
2 Sprocket Shaft 1× Toothed shaft engaging the film’s perforations; eight perforations past the gate equals one frame, and it meters the advance exactly.
3 Take-Up Spool 1× Slotted slip-clutch spool that winds exposed film, slipping slightly so the sprocket, not the spool diameter, sets frame spacing.
4 Frame Counter 1× Additive dial stepped by the advance stroke and reset automatically when the back door opens.
5 Rewind Crank 1× Fold-out crank on a forked shaft that turns the cassette spool to rewind the film once the release-side clutch is disengaged.
6 Helical Gear Pair 1× Transport gearing

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 Film Transport

6 top-level lines · 6 rows shown · 6 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Film Advance Lever film-camera-35mm-advance-lever 1× 1 · part
2 Sprocket Shaft film-camera-35mm-sprocket-shaft 1× 1 · part
3 Take-Up Spool film-camera-35mm-takeup-spool 1× 1 · part
4 Frame Counter film-camera-35mm-frame-counter 1× 1 · part
5 Rewind Crank film-camera-35mm-rewind-crank 1× 1 · part
6 Helical Gear Pair gear-pair 1× 1 · part

Something wrong in this list? Report a problem with this BOM.

Where the film transport is used

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

Used in 1 assembly

35mm Film SLR Camera

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