When sourcing a cold planer, the most critical technical factors are milling width and depth. For standard road maintenance, a milling width of 1,000mm to 2,000mm is common, while compact units for patching may range from 300mm to 600mm. Ensure the machine features a high-strength alloy milling drum and carbide-tipped bits for durability. Additionally, verify the engine power (HP/kW) to ensure it can handle the density of the asphalt or concrete you intend to process, and check for automatic leveling systems which are essential for maintaining precision in road longitudinal and transverse slopes.