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Railway Turntable

Product

Overview

A railway turntable is a rotating bridge carrying a complete locomotive or coach on a circular rail track. The bridge rotates around a massive center pivot bearing, allowing the vehicle to point in a new direction without moving under its own power. Modern turntables are electrically driven with dual motors powering friction wheels that grip the circular rail.

How it works

When the depot operator signals the turntable control, the Mechanical Lock disengages. The two Drive Units simultaneously energise their motors, driving drive wheels against the Circular Rail Track. The wheels roll the Rotating Bridge Deck around the Center Pivot Bearing.

The Guide Wheel System constrain the deck laterally as it spins. An Encoder on the motor feeds back rotation angle to the control system. Once the Control Panel confirms the desired orientation, the motor drive disengages and the Mechanical Lock re-engages mechanically, dropping or sliding a lock pin into a pit-mounted catch.

Railway Turntable parts and their functions

7 top-level parts · 130 parts in total · full bill of materials below
Railway Turntable parts diagram: 1 circular rail track, 2 rotating bridge deck, 3 center pivot bearing, 4 drive units, 5 mechanical lock, 6 guide wheel system, 7 control panel. 130 parts in 7 top-level items.
Railway Turntable parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Circular Rail Track 3 parts 1× Curved rail track
2 Rotating Bridge Deck 4 parts 1× Rotating platform structure
3 Center Pivot Bearing 4 parts 1× Radial bearing assembly
4 Drive Units 4 parts 1× Motor-driven wheel assemblies
5 Mechanical Lock 3 parts 1× Mechanical alignment lock
6 Guide Wheel System 2 parts 1× Lateral constraint system
7 Control Panel 5 parts 1× Operator controls and indicators

3D model

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Build & assembly graph

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Bill of materials for Railway Turntable

7 top-level lines · 42 rows shown · 130 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Circular Rail Track 3 parts railway-turntable-circular-rail 1× 1 26 assembly
1.1 Curved Rail Segment railway-turntable-rail-segment 8× 8 · part
1.2 Rail Bracket railway-turntable-rail-bracket 16× 16 · part
1.3 Fastener Set fastener-set 2× 2 · part
2 Rotating Bridge Deck 4 parts railway-turntable-bridge-deck 1× 1 11 assembly
2.1 Deck Main Beam railway-turntable-deck-beams 2× 2 · part
2.2 Cross Member railway-turntable-cross-members 6× 6 · part
2.3 Deck Plate railway-turntable-deck-plate 1× 1 · part
2.4 Sheet Metal Panel sheet-panel 2× 2 · part
3 Center Pivot Bearing 4 parts railway-turntable-center-pivot 1× 1 5 assembly
3.1 Pivot Base Pedestal railway-turntable-pivot-base 1× 1 · part
3.2 Ball Bearing ball-bearing 2× 2 · part
3.3 Lubricant Housing railway-turntable-lubricant-housing 1× 1 · part
3.4 O-Ring Set oring-set 1× 1 · part
4 Drive Units 4 parts railway-turntable-drive-units 1× 1 64 assembly
4.1 Drive Motor 4 parts railway-turntable-drive-motor 2× 2 25 assembly
4.1.1 Stator Assembly 3 parts + deeper › stator-assembly 1× 2 3 assembly
4.1.2 Rotor Assembly 4 parts + deeper › rotor-assembly 1× 2 19 assembly
4.1.3 Ball Bearing ball-bearing 2× 4 · part
4.1.4 Oil Seal oil-seal 1× 2 · part
4.2 Gear Reducer 4 parts railway-turntable-gear-reducer 2× 2 5 assembly
4.2.1 Gearbox Housing gearbox-housing 1× 2 · part
4.2.2 Helical Gear Pair gear-pair 1× 2 · part
4.2.3 Ball Bearing ball-bearing 2× 4 · part
4.2.4 Oil Seal oil-seal 1× 2 · part
4.3 Drive Wheel railway-turntable-drive-wheel 2× 2 · part
4.4 Wheel Bearing Block railway-turntable-wheel-bearing-block 2× 2 · part
5 Mechanical Lock 3 parts railway-turntable-locking-system 1× 1 4 assembly
5.1 Lock Hook railway-turntable-lock-hook 1× 1 · part
5.2 Lock Actuator 2 parts railway-turntable-lock-actuator 1× 1 2 assembly
5.2.1 Pressure Sensor pressure-sensor 1× 1 · part
5.2.2 Fastener Set fastener-set 1× 1 · part
5.3 Fastener Set fastener-set 1× 1 · part
6 Guide Wheel System 2 parts railway-turntable-guide-wheels 1× 1 12 assembly
6.1 Guide Wheel railway-turntable-guide-wheel 4× 4 · part
6.2 Ball Bearing ball-bearing 8× 8 · part
7 Control Panel 5 parts railway-turntable-control-panel 1× 1 8 assembly
7.1 Bare PCB pcb-bare 1× 1 · part
7.2 Microcontroller mcu 1× 1 · part
7.3 Encoder encoder 1× 1 · part
7.4 Relay relay 4× 4 · part
7.5 LCD Panel lcd-panel 1× 1 · part

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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 $500k–$60M. How estimates work
VendorHQSpecialtyMOQLead time
🇨🇳CRRC
crrcgc.cc ↗ 		Beijing, CN Rolling stock & rail systems made to order 40–72 wks
🇫🇷Alstom
alstom.com ↗ 		Saint-Ouen, FR Rail rolling stock made to order 40–72 wks
🇩🇪Siemens Mobility
mobility.siemens.com ↗ 		Munich, DE Rail systems made to order 40–72 wks
🇨🇭Stadler Rail
stadlerrail.com ↗ 		Bussnang, CH Rail rolling stock made to order 40–72 wks
🇺🇸Wabtec
wabteccorp.com ↗ 		Pittsburgh, US Rail equipment made to order 40–72 wks

176-word article