Poreba

Poreba® Machine Tool Rebuilding & Repair

At Precision Service Machine Tool Rebuilders, premium manual and CNC machine tools have been our specialty since 1983—and Poreba lathes are exactly the kind of heavy, long-bed, large-swing equipment we’re built to support. As an experienced lathe rebuilding company, we work with machines where bed condition, alignment, spindle performance, and long-travel accuracy directly affect finished parts.

Our role is simple: keep your Poreba equipment accurate, reliable, and productive for as long as possible through expert rebuilds, repairs, and modernizations—whether you’re running classic gap-bed engine lathes or modern CNC and oil country machines. Our CNC lathe rebuilding services Illinois operations rely on the same practical approach: determine where accuracy or reliability has been lost, identify the underlying wear or system problem, and scope the work around what the machine actually requires. Poreba is known worldwide for heavy and super heavy-duty horizontal lathes capable of handling extremely large, high-mass workpieces for demanding industries such as power generation, mining, metallurgical, and shipbuilding.

Why Poreba Owners Work With Us

Poreba lathes are built for serious work—long shafts, large diameters, deep-hole drilling setups, and heavy interrupted cuts. Over time, even this kind of iron experiences:

Wear on beds, ways, saddles, and cross slides—especially on long-travel machines
Spindle, headstock, and tailstock issues on high-mass workpieces
Twist and sag in long beds affecting straightness and taper over full travel
Backlash and wear in leadscrews, nuts, feeds, and threading systems
Problems in hydraulic, lubrication, and coolant systems
Electrical failures in motors, drives, and control panels
Obsolete or unsupported CNC, drive, and interface components

For a lathe rebuilding company, these conditions need to be considered together. Correcting one worn component without checking bed geometry, alignment, spindle condition, and related systems may leave the underlying accuracy problem unresolved. Depending on the source of the error, laser measurement and alignment may be used to restore CNC machine accuracy by identifying positioning and geometric errors that need correction.

We focus on:

Restoring factory-level (or better) geometry and accuracy on large, long-bed lathes
Improving reliability, uptime, and consistency on critical production machines
Extending machine life at a fraction of replacement cost—especially on large Poreba units
Modernizing drives, electrics, and controls where appropriate
Protecting the value of proven Poreba iron already on your floor

Our CNC lathe rebuilding services Illinois capabilities can also address aging controls, drives, feedback devices, and electrical systems when mechanical rebuilding alone will not provide the reliability the machine needs for continued production. On CNC machine tools equipped with automatic tool-changing systems, recurring indexing, positioning, or exchange problems can also indicate the need for tool changer service in Addison IL before a developing problem causes additional downtime.

Types of Poreba Machines We Service

We work on both legacy and modern Poreba machines, manual and CNC, including:

Heavy-duty and super heavy-duty manual engine lathes (gap-bed and straight-bed designs)
CNC horizontal lathes and flat-bed machines used for large shafts and rolls
Oil country / hollow-spindle lathes for tubulars and energy-sector work (large spindle bore)
Horizontal table-type boring mills and related Poreba horizontal drilling/boring machines
Vertical boring mills / VTLs branded Poreba where the base iron remains sound

If your specific Poreba model isn’t listed, we are still interested in discussing it—our experience covers many custom, special, and older machines. As a lathe rebuilding company, we evaluate the condition of the machine and its production requirements before determining whether repair, rebuilding, modernization, or a combination of work makes the most sense. Where wear or damage to precision guide surfaces is affecting geometry, slideway grinding can be part of the machine tool accuracy restoration process.

What We Do for Poreba Equipment

Tear-down to major castings for the bed, base, and major structural components
Cleaning, stripping, and detailed inspection of all assemblies
Way regrinding and scraping (bed, saddle, cross slide, tailstock base)
Replacement or reconditioning of leadscrews, nuts, bearings, clutches, and gibs
Spindle, headstock, apron, and tailstock rebuilds
Overhaul of feed gearboxes, threading systems, and rapid-traverse mechanisms
Hydraulic, lubrication, and coolant systems restored to proper function

For large, long-bed Poreba machines, we pay special attention to supporting and fixturing the base during rebuild so the geometry you pay for in our shop is what you see on your floor.

Bed and way regrinding on long Poreba beds, followed by hand scraping
Saddle and cross slide reconditioning to match restored bed surfaces
Alignment of headstock, tailstock, and carriage to original or specified tolerances
Correction of taper, straightness, and squareness over full travel and full swing
Compensation strategies and clear documentation of final geometry conditions

On very long Poreba lathes, geometric integrity is everything—we focus on practical accuracy where your parts actually run.

Replacement of obsolete motors, starters, drives, and electrical panels
AC inverter drive upgrades for smoother speed control and better energy use
Rewiring to current standards with updated schematics and labeling
Integration of modern safety devices, interlocks, and operator conveniences
Support for future serviceability and parts availability

Whether your Poreba is still manual with relay logic or has aging CNC hardware, we can help you make a sensible plan for keeping it reliable.

Replacement of outdated CNC or combination controls on Poreba CNC lathes
Integration of new control packages while retaining proven Poreba iron and mechanics
Servo, drive, feedback, and interface upgrades to improve performance and supportability
Run-off and verification using your parts, programs, and process requirements

Our goal is to give you a Poreba that “feels new” from the operator perspective—without paying new-machine prices for heavy cast iron you already own.

On-site diagnosis and corrective repair for down or drifting Poreba machines
Laser and mechanical alignment checks on ways, headstock, and tailstock
Backlash, feed irregularities, threading issues, and performance corrections
Emergency support when a critical Poreba machine is down or parts are out of tolerance

For some Poreba units, a targeted, on-site intervention is the fastest way to get you back in production.

Machine-specific PM programs for your Poreba fleet
Wear tracking on ways, spindles, and feed components
Planned repairs and phased rebuilds instead of catastrophic failures
Guidance on when to repair, partial-rebuild, full-rebuild, or modernize

We help you treat each Poreba as a long-term capital asset—not just a machine to run until it fails.

Loss of accuracy, taper, or out-of-round conditions on long shaft work
Chatter and poor surface finish when roughing or finishing heavy parts
Excessive backlash in crossfeed, carriage, or compound, affecting profiles and threads
Spindle noise, heat, or vibration that point to bearing or alignment issues
Tailstock misalignment causing unacceptable taper over long lengths
Feed and threading problems tied to worn clutches, gears, or leadscrew components
Electrical failures in motors, drives, and legacy CNC or relay controls
Obsolete electrical and control components that are no longer supported or easily sourced

Our Poreba Rebuild Process

Evaluation & Scope

Detailed inspection, test cuts, and geometry checks tailored to large, heavy Poreba work; clear, written scope and quotation.

Disassembly & Cleaning

Down to major assemblies or base castings; components cleaned, inspected, and tagged for repair, replacement, or upgrade.

Geometry & Structure

Ways restored, saddles and slides fitted, twist and sag addressed, and motion components rebuilt or replaced.

Subsystem Rebuilds & Upgrades

Spindles, aprons, tailstocks, lubrication, guarding, electrics, drives, and controls rebuilt or modernized as needed.

Reassembly & Calibration

Rebuilt machine assembled, leveled, aligned, and function-tested—including verification over full travel and typical load ranges.

Run-Off & Documentation

Cutting tests performed; accuracy data, alignment records, and any new electrical or control documentation provided.

Keep Your Poreba Machines Earning

Contact Us Click-to-call 1-800-4-REBUILD

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