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

Electric Model Train Set

Product

Overview

An electric model train set runs a scale railway from power fed through the rails themselves. The Locomotive is the only powered vehicle; it draws current off the track, drives its wheels through gears, and tows a string of Rolling Stock Car cars. The trains run on a loop built from sectional Track Set pieces joined by rail joiners, with Turnout switches to route between roads. An Power Pack supplies and controls the track voltage, magnetic couplers let cars join and part, and Trackside Building scenery dresses the layout.

How it works

Power reaches the locomotive without any wires to the train. The two rails are the two conductors: the Power Pack puts a controlled voltage across them, and each Wheelset has metal wheels with an Current Pickup wiper that carries that current up into the locomotive. Inside, the Traction Motor turns a Helical Gear Pair reduction down to the driven axles; a brass Flywheel smooths the torque so the engine crawls steadily instead of lurching. In a digital (DCC) set the DCC Decoder reads command packets superimposed on the track voltage, so several locomotives on the same rails can be driven independently, speed, direction, and lights all set by address.

The track is modular. Straight and curved sections snap together and the Rail Joiner fishplates both hold the rails aligned and pass current along them. A Turnout is a powered switch: a twin-coil solenoid throws the Point Blade to send the train onto the straight or the diverging road. Cars couple with Magnetic Coupler knuckles closed by a Neodymium Magnet, so they join when pushed together and can be uncoupled over a magnet set in the track. The unpowered cars ride on pivoting Bogie trucks that let long vehicles follow tight curves.

Electric Model Train Set parts and their functions

6 top-level parts · 176 parts in total · full bill of materials below
Electric Model Train Set parts diagram: 1 locomotive, 2 rolling stock car, 3 track set, 4 turnout, 5 power pack, 6 trackside building. 176 parts in 6 top-level items.
Electric Model Train Set parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Locomotive 7 parts 1× Powered locomotive
2 Rolling Stock Car 3 parts 4× Coaches and freight cars
3 Track Set 3 parts 1× Sectional track and joiners
4 Turnout 3 parts 2× Powered turnouts
5 Power Pack 3 parts 1× Power pack and controller
6 Trackside Building 3× Trackside buildings

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 Electric Model Train Set

6 top-level lines · 45 rows shown · 176 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Locomotive 7 parts electric-train-set-locomotive 1× 1 48 assembly
1.1 Locomotive Chassis electric-train-set-loco-chassis 1× 1 · part
1.2 Locomotive Shell electric-train-set-loco-shell 1× 1 · part
1.3 Traction Motor 4 parts electric-train-set-loco-motor 1× 1 25 assembly
1.3.1 Stator Assembly 3 parts + deeper › stator-assembly 1× 1 3 assembly
1.3.2 Rotor Assembly 4 parts + deeper › rotor-assembly 1× 1 19 assembly
1.3.3 Ball Bearing ball-bearing 2× 2 · part
1.3.4 Flywheel electric-train-set-flywheel 1× 1 · part
1.4 Helical Gear Pair gear-pair 2× 2 · part
1.5 Wheelset 3 parts electric-train-set-wheelset 3× 3 4 assembly
1.5.1 Axle electric-train-set-axle 1× 3 · part
1.5.2 Wheel electric-train-set-wheel 2× 6 · part
1.5.3 Current Pickup electric-train-set-pickup 1× 3 · part
1.6 DCC Decoder 3 parts electric-train-set-decoder 1× 1 3 assembly
1.6.1 Bare PCB pcb-bare 1× 1 · part
1.6.2 Microcontroller mcu 1× 1 · part
1.6.3 SMD Passive (R/C/L) smd-passives 1× 1 · part
1.7 Magnetic Coupler 2 parts electric-train-set-coupler 2× 2 2 assembly
1.7.1 Coupler Knuckle electric-train-set-coupler-knuckle 1× 2 · part
1.7.2 Neodymium Magnet neodymium-magnet 1× 2 · part
2 Rolling Stock Car 3 parts electric-train-set-rolling-stock 4× 4 23 assembly
2.1 Car Body electric-train-set-car-body 1× 4 · part
2.2 Bogie 2 parts electric-train-set-bogie 2× 8 9 assembly
2.2.1 Bogie Frame electric-train-set-bogie-frame 1× 8 · part
2.2.2 Wheelset 3 parts + deeper › electric-train-set-wheelset 2× 16 4 assembly
2.3 Magnetic Coupler 2 parts electric-train-set-coupler 2× 8 2 assembly
2.3.1 Coupler Knuckle electric-train-set-coupler-knuckle 1× 8 · part
2.3.2 Neodymium Magnet neodymium-magnet 1× 8 · part
3 Track Set 3 parts electric-train-set-track-set 1× 1 21 assembly
3.1 Straight Track electric-train-set-straight-track 8× 8 · part
3.2 Curved Track electric-train-set-curved-track 12× 12 · part
3.3 Rail Joiner electric-train-set-rail-joiner 1× 1 · part
4 Turnout 3 parts electric-train-set-turnout 2× 2 3 assembly
4.1 Turnout Base electric-train-set-turnout-base 1× 2 · part
4.2 Point Blade electric-train-set-point-blade 1× 2 · part
4.3 Relay relay 1× 2 · part
5 Power Pack 3 parts electric-train-set-power-pack 1× 1 6 assembly
5.1 Power Supply power-supply 1× 1 · part
5.2 Controller Board 4 parts electric-train-set-controller-board 1× 1 4 assembly
5.2.1 Bare PCB pcb-bare 1× 1 · part
5.2.2 Microcontroller mcu 1× 1 · part
5.2.3 SMD Passive (R/C/L) smd-passives 1× 1 · part
5.2.4 Throttle Potentiometer electric-train-set-throttle-pot 1× 1 · part
5.3 Track Feeder Clip electric-train-set-track-clip 1× 1 · part
6 Trackside Building electric-train-set-building 3× 3 · part

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

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 $20–$3k. How estimates work
VendorHQSpecialtyMOQLead time
🇩🇰LEGO
lego.com ↗
Billund, DK Construction toys 2,000 units 6–10 wks
🇺🇸Mattel
mattel.com ↗
El Segundo, US Toys 2,000 units 6–10 wks
🇺🇸Hasbro
hasbro.com ↗
Pawtucket, US Toys & games 2,000 units 6–10 wks
🇯🇵Bandai Namco
bandainamco.co.jp ↗
Tokyo, JP Toys & amusement 2,000 units 6–10 wks
🇨🇦Spin Master
spinmaster.com ↗
Toronto, CA Toys 2,000 units 6–10 wks

340-word article