Overview
A used small planer machine, often referred to as a double-housing planer, is a pre-owned industrial tool designed for precision machining of flat surfaces. These machines are commonly sought by small workshops or manufacturers needing cost-effective alternatives to new equipment. The 'small' classification typically refers to a working width under 1.5 meters and a weight below 5 tons. Second-hand models may include manual or early-generation CNC variants, with lifespan depending on previous usage intensity. Common brands in the used market include SMTCL, Heckert, and older models from Toshiba Machine. Buyers should note that while these machines reduce capital expenditure, they may require more frequent maintenance than new equivalents.
Structure and Working Principle
The machine consists of a rigid frame (resembling a 'gate' or 'portal'), a reciprocating worktable, and a cross-rail carrying tool heads. During operation, the workpiece is fixed to the table, which moves linearly beneath the cutting tools. The tools, mounted on adjustable heads, can perform horizontal, vertical, or angular cuts. Key components to evaluate in used models include the drive mechanism (typically rack-and-pinion or hydraulic), guideway condition (usually box or dovetail type), and the integrity of the gearbox. Older hydraulic systems may show oil leakage issues, while mechanical drives might exhibit backlash from wear. The machine's accuracy is largely determined by the condition of these components.
Key Features
Used small planers offer several advantages: reduced initial investment (typically 30–60% cheaper than new), immediate availability, and proven reliability if well-maintained. Many older models were built with heavier castings than modern equivalents, providing superior vibration damping. Common features to look for include adjustable feed rates (often 3–30 m/min), tool head configurations (single or multiple heads), and table load capacity (usually 500–2,000 kg). Some models may have retrofitted digital readouts (DROs) for improved precision. However, buyers should be aware that energy efficiency is generally lower than newer machines, with power consumption ranging 5–15 kW depending on size.
Application Areas
These machines are widely used in job shops for machining large flat surfaces on components like machine bases, press plates, or mold frames. The automotive industry utilizes them for brake disc machining, while energy sector suppliers employ them for flange facing. Secondary applications include educational institutions for training purposes and repair workshops restoring oversized components. The small size makes them suitable for facilities with space constraints. Typical workpiece materials include cast iron, carbon steel, and occasionally aluminum alloys. Their versatility allows for plane machining, slot cutting, and step machining operations.
Maintenance and Precautions
Regular maintenance is crucial for used machines. Daily checks should include lubrication of guideways (way oil VG68 is common), inspection of drive belts/chains, and cleaning of chips. Monthly maintenance involves checking hydraulic oil quality and adjusting gib strips for proper alignment. Critical precautions: always verify the machine's electrical safety (especially insulation resistance), and inspect for structural cracks in castings. Common wear parts needing replacement in used units are scraping inserts, lead screws, and motor bearings. Proper leveling is essential—misalignment accelerates wear. For machines with aged electronics, consider budgeting for control system upgrades (approx. $2,000–$5,000).
B2B Procurement Guide
When sourcing used small planers, prioritize machines with verifiable operational history. Request test cuts to assess surface finish quality (aim for ≤3.2 μm Ra) and parallelism (≤0.02 mm/m). Check for availability of spare parts—many European brands have discontinued support for older models. Negotiation points include remaining tool life, included accessories (clamping kits, tool holders), and potential transport costs (machines often require disassembly). For international purchases, verify voltage compatibility (common: 380V/50Hz or 440V/60Hz). Lead times are typically shorter than new machines—expect 2–6 weeks including inspection and logistics. Always use escrow services for cross-border transactions.
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