Cold Milling Machine (Road Planer)

Product

Wirtgen W 210 Fi cold planer milling asphalt road.png · Commons ↗ Report photo

A self-propelled tracked planer that grinds away worn asphalt or concrete with a carbide-tipped drum and loads the millings onto a discharge conveyor.

Type	Self-propelled tracked cold planer
Milling width	2.0 m
Maximum milling depth	330 mm
Drum tool count	≈ 180 carbide picks
Drum diameter	≈ 1,000 mm over tools
Engine power	470 kW (630 hp)
Operating weight	31,500 kg
Working speed	0–45 m/min
Discharge conveyor	Front, slewing ±55°
Water tank	3,000 L
Track drive	Hydrostatic, 4 crawlers
Depth control	Sonic + laser grade references
Direct parts	9
Total parts	824
Class	Product

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Overview

A cold milling machine removes a controlled thickness of asphalt or concrete pavement so a road can be resurfaced to the correct level. "Cold" means it grinds the existing surface at ambient temperature rather than heating it, producing reclaimable millings that are recycled into new asphalt. The machine sets the depth and cross-slope of the cut precisely, leaving a clean, textured surface ready for a fresh overlay.

Two systems define it: the Milling Drum Unit that does the cutting, and the Conveyor System that clears the millings continuously so the cut never chokes. A turbocharged Diesel Engine supplies the large power the drum demands.

How it works

The heart of the machine is the Milling Drum Unit, a heavy steel drum carrying a spiral pattern of replaceable carbide picks. Engine power reaches it through the Drum Drive, a belt feeding a reduction gearbox, because the drum needs high torque at a modest speed. As the picks strike the pavement they fracture it into millings; each pick rotates freely in its holder so it self-sharpens and wears evenly, and worn picks are knocked out and replaced individually.

The machine rides on four crawler Tracks & Leg Columns units mounted on hydraulic leg columns. Raising or lowering the legs sets the milling depth, and driving the front and rear legs to different heights sets the cross-slope, both held automatically by the Machine Control grade system referencing a stringline, the existing surface, or a laser plane.

Millings are scooped from the drum chamber by the Conveyor System primary belt and handed to a long front discharge belt that throws them into a truck driving ahead of the machine; the discharge belt slews to either side to follow the truck. The Water Spray System system continuously wets the drum to cool the carbide tips and knock down dust. All travel, leg, conveyor, and steering motion is powered by the Hydraulic System, with the operator working from a quiet, isolated Operator Cab that has direct sightlines to the cutting edge.

Cold Milling Machine (Road Planer) parts and their functions

9 top-level parts · 824 parts in total · full bill of materials below

Cold Milling Machine (Road Planer) parts diagram: 1 machine chassis, 2 diesel engine, 3 milling drum unit, 4 conveyor system, 5 tracks & leg columns, 6 water spray system, 7 hydraulic system, 8 operator cab, 9 machine control. 824 parts in 9 top-level items. — Cold Milling Machine (Road Planer) 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	Machine Chassis 3 parts	1×	Machine chassis
2	Diesel Engine 6 parts	1×	Diesel engine
3	Milling Drum Unit 6 parts	1×	Milling drum unit
4	Conveyor System 4 parts	1×	Conveyor system
5	Tracks & Leg Columns 3 parts	1×	Tracks & leg columns
6	Water Spray System 4 parts	1×	Water spray system
7	Hydraulic System 4 parts	1×	Hydraulic system
8	Operator Cab 3 parts	1×	Operator cab
9	Machine Control 3 parts	1×	Machine control

Diagrams & photos

Wirtgen W 210 Fi cold planer milling asphalt road.png · Commons

Repairing the A44 (1) - geograph.org.uk - 651389.jpg · Commons

169th St 81st Av td (2019-07-09) 08.jpg · Commons

169th St 81st Av td (2019-07-09) 05.jpg · Commons

3D model

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Build & assembly graph

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Bill of materials for Cold Milling Machine (Road Planer)

9 top-level lines · 108 rows shown · 824 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Machine Chassis 3 parts	cmm-chassis	1×	1	4	assembly
1.1	Main Frame	cmm-main-frame	1×	1	·	part
1.2	Side Plate	cmm-side-plate	2×	2	·	part
1.3	Fastener Set	fastener-set	1×	1	·	part
2	Diesel Engine 6 parts	cmm-engine	1×	1	20	assembly
2.1	Engine Block	cmm-engine-block	1×	1	·	part
2.2	Piston	cmm-piston	6×	6	·	part
2.3	Crankshaft	cmm-crankshaft	1×	1	·	part
2.4	Turbocharger	cmm-turbo	1×	1	·	part
2.5	Fuel System 3 parts	cmm-fuel-system	1×	1	8	assembly
2.5.1	Injection Pump	cmm-injection-pump	1×	1	·	part
2.5.2	Fuel Injector	cmm-injector	6×	6	·	part
2.5.3	Fuel Filter	cmm-fuel-filter	1×	1	·	part
2.6	Engine Cooling 3 parts	cmm-cooling	1×	1	3	assembly
2.6.1	Radiator	radiator	1×	1	·	part
2.6.2	Coolant Pump	coolant-pump	1×	1	·	part
2.6.3	Hydraulic Cooling Fan	cmm-cooling-fan	1×	1	·	part
3	Milling Drum Unit 6 parts	cmm-milling-unit	1×	1	380	assembly
3.1	Milling Drum 4 parts	cmm-milling-drum	1×	1	6	assembly
3.1.1	Drum Tube	cmm-drum-tube	1×	1	·	part
3.1.2	Spiral Flight	cmm-drum-flight	1×	1	·	part
3.1.3	Ball Bearing	ball-bearing	2×	2	·	part
3.1.4	Oil Seal	oil-seal	2×	2	·	part
3.2	Carbide Cutting Pick	cmm-carbide-pick	180×	180	·	part
3.3	Pick Holder	cmm-pick-holder	180×	180	·	part
3.4	Drum Housing	cmm-drum-housing	1×	1	·	part
3.5	Drum Drive 6 parts	cmm-drum-drive	1×	1	12	assembly
3.5.1	Drive Belt	cmm-drive-belt	1×	1	·	part
3.5.2	Belt Pulley	cmm-belt-pulley	2×	2	·	part
3.5.3	Gearbox Housing	gearbox-housing	1×	1	·	part
3.5.4	Helical Gear Pair	gear-pair	2×	2	·	part
3.5.5	Ball Bearing	ball-bearing	4×	4	·	part
3.5.6	Oil Seal	oil-seal	2×	2	·	part
3.6	Rear Moldboard	cmm-moldboard	1×	1	·	part
4	Conveyor System 4 parts	cmm-conveyor-system	1×	1	106	assembly
4.1	Primary Conveyor 3 parts	cmm-primary-conveyor	1×	1	20	assembly
4.1.1	Conveyor Belt	cmm-conveyor-belt	1×	1	·	part
4.1.2	Conveyor Roller	cmm-conveyor-roller	18×	18	·	part
4.1.3	Conveyor Frame	cmm-conveyor-frame	1×	1	·	part
4.2	Discharge Conveyor 3 parts	cmm-discharge-conveyor	1×	1	24	assembly
4.2.1	Conveyor Belt	cmm-conveyor-belt	1×	1	·	part
4.2.2	Conveyor Roller	cmm-conveyor-roller	22×	22	·	part
4.2.3	Conveyor Frame	cmm-conveyor-frame	1×	1	·	part
4.3	Conveyor Drive Motor 4 parts	cmm-conveyor-motor	2×	2	25	assembly
4.3.1	Stator Assembly 3 parts + deeper ›	stator-assembly	1×	2	3	assembly
4.3.2	Rotor Assembly 4 parts + deeper ›	rotor-assembly	1×	2	19	assembly
4.3.3	Motor Housing	motor-housing	1×	2	·	part
4.3.4	Ball Bearing	ball-bearing	2×	4	·	part
4.4	Slew Cylinder 4 parts	cmm-slew-cylinder	2×	2	6	assembly
4.4.1	Cylinder Barrel	cmm-cyl-barrel	1×	2	·	part
4.4.2	Cylinder Rod	cmm-cyl-rod	1×	2	·	part
4.4.3	O-Ring Set	oring-set	2×	4	·	part
4.4.4	Oil Seal	oil-seal	2×	4	·	part
5	Tracks & Leg Columns 3 parts	cmm-track-leg	1×	1	92	assembly
5.1	Crawler Track 4 parts	cmm-track	4×	4	16	assembly
5.1.1	Track Chain	cmm-track-chain	1×	4	·	part
5.1.2	Track Drive Motor 5 parts + deeper ›	cmm-track-motor	1×	4	8	assembly
5.1.3	Drive Sprocket	cmm-track-sprocket	1×	4	·	part
5.1.4	Track Roller	cmm-track-roller	6×	24	·	part
5.2	Leg Column	cmm-leg-column	4×	4	·	part
5.3	Leg Lift Cylinder 4 parts	cmm-leg-cylinder	4×	4	6	assembly
5.3.1	Cylinder Barrel	cmm-cyl-barrel	1×	4	·	part
5.3.2	Cylinder Rod	cmm-cyl-rod	1×	4	·	part
5.3.3	O-Ring Set	oring-set	2×	8	·	part
5.3.4	Oil Seal	oil-seal	2×	8	·	part
6	Water Spray System 4 parts	cmm-water-spray	1×	1	39	assembly
6.1	Water Tank	cmm-water-tank	1×	1	·	part
6.2	Spray Pump 4 parts	cmm-water-pump	1×	1	25	assembly
6.2.1	Stator Assembly 3 parts + deeper ›	stator-assembly	1×	1	3	assembly
6.2.2	Rotor Assembly 4 parts + deeper ›	rotor-assembly	1×	1	19	assembly
6.2.3	Pump Impeller	cmm-pump-impeller	1×	1	·	part
6.2.4	Ball Bearing	ball-bearing	2×	2	·	part
6.3	Spray Nozzle	cmm-spray-nozzle	12×	12	·	part
6.4	Water Filter	cmm-water-filter	1×	1	·	part
7	Hydraulic System 4 parts	cmm-hydraulic-system	1×	1	46	assembly
7.1	Hydraulic Pump 4 parts	cmm-hyd-pump	3×	3	7	assembly
7.1.1	Pump Rotating Group	cmm-pump-rotating-group	1×	3	·	part
7.1.2	Ball Bearing	ball-bearing	2×	6	·	part
7.1.3	O-Ring Set	oring-set	2×	6	·	part
7.1.4	Oil Seal	oil-seal	2×	6	·	part
7.2	Valve Bank 3 parts	cmm-valve-bank	1×	1	23	assembly
7.2.1	Spool Valve	cmm-spool-valve	10×	10	·	part
7.2.2	Relay	relay	8×	8	·	part
7.2.3	O-Ring Set	oring-set	5×	5	·	part
7.3	Hydraulic Reservoir	cmm-hyd-tank	1×	1	·	part
7.4	Hydraulic Oil Cooler	cmm-hyd-cooler	1×	1	·	part
8	Operator Cab 3 parts	cmm-cab	1×	1	24	assembly
8.1	Seat Assembly 5 parts	seat-assembly	1×	1	7	assembly
8.1.1	Seat Frame	seat-frame	1×	1	·	part
8.1.2	Seat Foam	seat-foam	2×	2	·	part
8.1.3	Seat Cover	seat-cover	1×	1	·	part
8.1.4	Seat Motor	seat-motor	2×	2	·	part
8.1.5	Seat Heater Mat	seat-heater	1×	1	·	part
8.2	Control Console 5 parts	cmm-console	1×	1	16	assembly
8.2.1	Bare PCB	pcb-bare	1×	1	·	part
8.2.2	Microcontroller	mcu	1×	1	·	part
8.2.3	LCD Panel	lcd-panel	1×	1	·	part
8.2.4	Touch Digitizer	touch-digitizer	1×	1	·	part
8.2.5	Console Switch	cmm-console-switch	12×	12	·	part
8.3	Cab Shell	cmm-cab-shell	1×	1	·	part
9	Machine Control 3 parts	cmm-control	1×	1	113	assembly
9.1	Grade Control Module 4 parts	cmm-control-module	1×	1	110	assembly
9.1.1	Bare PCB	pcb-bare	1×	1	·	part
9.1.2	Microcontroller	mcu	1×	1	·	part
9.1.3	Connector	connector	8×	8	·	part
9.1.4	SMD Passive (R/C/L)	smd-passives	100×	100	·	part
9.2	Grade Reference Sensor	cmm-grade-sensor	2×	2	·	part
9.3	Cross-Slope Sensor	cmm-slope-sensor	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 $15k–$2M. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇺🇸Caterpillar caterpillar.com ↗	Irving, US	Construction & mining equipment	made to order	16–28 wks
🇯🇵Komatsu komatsu.com ↗	Tokyo, JP	Construction & mining equipment	made to order	16–28 wks
🇸🇪Volvo CE volvoce.com ↗	Gothenburg, SE	Construction equipment	made to order	16–28 wks
🇨🇭Liebherr liebherr.com ↗	Bulle, CH	Cranes & heavy equipment	made to order	16–28 wks
🇨🇳XCMG xcmg.com ↗	Xuzhou, CN	Construction machinery	made to order	16–28 wks

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