Machining long drive shafts and oversized industrial rollers requires structural rigidity that standard machine tools cannot deliver. The Extended-Bed Conventional Lathe is built with an ultra-long heavy-duty bed, giving precision machine shops and maintenance facilities the longitudinal travel needed for extra-length workpieces. By combining a classic operator-friendly manual design with reinforced guide paths, this machine ensures high torque, easy control, and stable alignment across long cutting distances without complex CNC programming.
Technical Specifications
|
Parameter |
Standard Range |
|
Max. Workpiece Length |
1,500 – 12,000 mm |
|
Max. Turning Length |
1,300 – 11,800 mm |
|
Swing Over Bed |
630 – 1,640 mm |
|
Swing Over Carriage |
350 – 1,250 mm |
|
Spindle Bore |
100 / 130 mm |
|
Spindle Speed |
3.15 – 1,000 r/min |
Size Selection Guide
Workpiece Dimensions: Measure the full length and diameter of your raw stock. Select a turning length that exceeds your actual machining stroke to allow carriage clearance and tailstock positioning.
Spindle Bore & Load: Choose a spindle bore diameter that matches your bar stock for pass-through operations. Heavy parts require robust headstock bearings and strong bedways to carry static loads.
Structural Features
Induction-Hardened Bedways: Cast-iron bed structure ground to strict straightness tolerances, resisting deflection and wearing over long travel distances.
Universal Threading Gearbox: Wide-range metric and inch thread cutting without frequent manual gear changes, speeding up shop floor workflows.
Heavy-Duty Carriage System: Hand-scraped mating surfaces provide smooth feed control, minimizing chatter during deep roughing cuts.
Main Applications of Extended-Bed Conventional Lathe
Industrial Shaft Manufacturing: Turning long power-transmission shafts, steel mill rolls, and large hydraulic piston rods.
Equipment Repair & Overhaul: Refurbishing worn rotational parts for mining, marine propulsion, and power plant infrastructure.
General Machine Shops: Versatile job-shop setups requiring quick manual adjustments for low-volume or single-piece orders.
Workholding Options
3-Jaw & 4-Jaw Chucks: Rapid self-centering chucks for concentric stock, plus independent 4-jaw chucks for asymmetric or irregular forgings.
Steady Rests: Stationary ring supports mounted on the bedways to prevent center-sag on long workpieces.
Follow Rests: Traveling supports fixed to the carriage that absorb cutting forces right next to the turning tool.
Precision Assurance
Long-bed turning accuracy depends heavily on alignment stability. Each machine undergoes static alignment testing, tailstock centerline checks, and lead-screw pitch tolerance verifications before shipment. Correct floor leveling, proper foundation preparation, and steady-rest adjustments are crucial to maintaining tolerance over extended bed lengths.
Pre-Quotation Checklist
Part Geometry: Outer diameter, maximum swing height, turned length, and overall weight.
Machining Scope: External turning, facing, taper cutting, internal boring, or special thread profiles.
Shop Setup: Available floor space, crane lifting capacity, and local power supply voltage.
FAQ
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