Overview
A used double housing planer is a robust industrial machine tool designed for precision surfacing of large metal components. These machines feature two upright housings supporting a cross rail that carries the cutting tools, providing exceptional stability during operation. Second-hand models are commonly sought after in metalworking industries as they offer significant cost savings compared to new equipment while still delivering precision results. When considering a used double housing planer, buyers should focus on the machine's service history, remaining accuracy specifications, and potential refurbishment needs. These machines typically have long service lives when properly maintained, making them attractive options for manufacturers needing large-capacity planning capabilities without new equipment prices.
Structure and Working Principle
The double housing planer consists of two massive vertical columns (housings) connected by an overhead cross rail that moves vertically. The worktable reciprocates longitudinally beneath the cutting tools mounted on the cross rail. The rigid double-housing design minimizes vibration and deflection during heavy cuts, ensuring surface flatness accuracy. Modern versions may include CNC controls even on used models, though traditional mechanical models remain common in secondary markets. The cutting tools remain stationary during operation while the workpiece moves back and forth on the reciprocating table, with the tool feeding incrementally across the workpiece width after each pass.
Key Features
Used double housing planers typically offer bed lengths ranging from 3 to 10 meters, with corresponding increases in motor power (commonly 20-75 HP). The most valuable features to evaluate in used machines include the condition of the bed ways, drive mechanism wear, and tool head precision. Many older models feature hardened and ground ways that maintain accuracy for decades. Critical specifications include maximum workpiece dimensions, table speed ranges, and cutting force capacity. Later-model used machines may offer advantages like automatic lubrication systems, digital readouts, or even basic CNC controls. The weight of these machines (often 10-30 tons) contributes to their stability but requires proper foundation support.
Application Areas
Used double housing planers serve industries requiring large, precision-machined surfaces including heavy equipment manufacturing, shipbuilding, and power generation component production. They're particularly valuable for machining large castings, weldments, and forgings that exceed the capacity of milling machines. Common applications include machining machine tool bases, large press platens, and turbine components. The automotive industry uses them for machining large dies and molds. These machines remain relevant in modern manufacturing despite competition from large milling machines, as they offer superior surface finish and flatness for certain applications at lower operating costs.
Maintenance and Precautions
Proper maintenance is crucial for used double housing planers to maintain accuracy and extend service life. Regular lubrication of ways and bearings is essential, along with periodic inspection and adjustment of drive mechanisms. The machine's alignment should be checked annually using precision levels and straightedges. Operators should monitor for signs of excessive wear in the table drive system, particularly in older machines with mechanical drives. Electrical systems on vintage machines may require upgrading for safety and reliability. When moving a used planer, special attention must be paid to protecting precision surfaces and preventing twisting of the massive cast iron bed.
B2B Procurement Guide
When purchasing a used double housing planer, first determine your required work envelope and accuracy specifications. Inspect the machine in person or through detailed video documentation, paying particular attention to way condition, backlash in feed mechanisms, and electrical system integrity. Verify availability of technical documentation and spare parts for the specific model. Consider the cost of any necessary refurbishment or reconditioning in your total investment calculation. Transportation and installation costs can be significant due to the machine's size and weight, so obtain quotes from specialized riggers before purchase.
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