Precision Machining Since 1985

We provide precision machining of industrial parts and equipment
from our state-of-the-art facility in Portland, Oregon.

Precision Machining in Manufacturing and Repairs

Since 1985, Western Machine Works has been providing precision machining to meet dimensional requirements up to .0005” accuracy, including very tight tolerances, finishes, outer diameter (OD), total indicator reading, and inside diameter (ID). An engineer is assigned to every project to ensure reliability of results from start to finish. Our precision machining has met stringent specifications and certifications for both federal and commercial customers with critical and demanding applications.

What is Precision Machining?

Precision machining is the process of removing material from a raw product to design and manufacture a final product used in very critical industries where no room for error is expected. Another use of precision machining is restoring critical dimensions and repairing worn-out parts for industrial equipment to withstand very demanding operating and environmental conditions. In both applications, Western Machine Works utilizes a high level of quality in tooling, machinery, machinist, and engineering to meet customers’ requirements no matter how complex or exacting they may be.

Precision Machining Services

Our experienced team of engineers and machinists specialize in fabricating, machining, and manufacturing large industrial equipment with very tight tolerances and exacting parameters.

Our precision machining services include:

  • Manufacturing precision and complex components, including process rolls, shafts, bearing housings, bushings, liners, propulsion hubs, turbine runner parts with equal or improved performance compared to the original parts.
  • Boring, milling, cutting, grinding, and restoration of critical fits and dimensions with up to .0005” accuracy.
  • Custom Fabrication with or without OEM prints.
  • Bearing fit restoration and surface protection using a thermal spray process compliant with OEM specifications.
  • Custom tooling and fabricating fixtures for complex setup.
  • Precision Roll Grinding and Dynamic Balancing.

Precision Machining Capabilities & Equipment


Engine Lathes

Used for precision machining, cutting, and shaping various materials, while rotating the workpiece about an axis. Our engine lathes can handle large critical components such as turbine runner shafts, wind turbine shafts, ship shafts, suction rolls, process rolls, large industrial drums, augers, screws, and cylinders.

  • Max. swing diameter: 78 ¾”
  • Max. between centers: 482”
  • Max. over cross slide: 66 1/2”

Vertical Boring

Vertical boring machines are used for turning and boring large and heavy industrial workpieces, such as water turbine runners, propulsion hubs, marine pipe sockets, thrust bearings, and trunnions. The workpiece is held on a horizontal table that rotates along a vertical axis, while the boring head moves linearly.

  • Max. swing diameter: 103”
  • Max. vertical under rail: 85”


Horizontal Boring

High precision equipment used to modify industrial parts and components by drilling, boring, milling, and grooving various types of steel and alloys in a horizontal direction. This allows for large parts to be machined quickly with great accuracy, while our machinists can reach small cavities easily.

  • 103” cross table travel
  • 60” x 120” table
  • 72” vertical travel


Precision Grinding

Precision grinding is used in various industries requiring maximum durability and reliability from its equipment. Western Machine Works can grind up to 4 Ra finish or regroove to precise dimensions to meet critical applications of rolls, screws, presses, augers, and other large rotating components.

Our Precision Grinding Machine

  • 48” OD x 290: Face
  • 4 Belt Grinder
  • Computer-controlled Crowns
  • 8” Superfinisher
  • Pro-Mic System

Dynamic & Static Balancing Machine

These are used to balance the moving parts of a machine or piece of industrial equipment by rotating these parts at high speeds or adding various counterweights. Roll Balancing is critical to minimizing vibrations and bearing replacements, optimizing the overall machine performance, and extending the life of the equipment.

  • 96” Swing x 552” Length
  • 3-Plane Capacity
  • 50 HP Drive


Western Machine Works can precisely machine components and parts in our state-of-the-art CNC machine, according to OEM specifications. These custom parts include:

  • Shafts
  • Process rolls
  • Bearing housings
  • Bushings and flanges
  • Custom tooling

Our CNC Lathe specifications:
13 ¼” Swing Over Carriage x 78”

Precision Machining for Critical Industries

Demanding the highest level of reliability and durability heavy equipment used in these industries requires precision machining. Western Machine Works is equipped with both state-of-the-art equipment and highly skilled technicians and engineers to meet the precision machining needs of these industries:

  • Pulp & Paper
  • Wind Power
  • Hydroelectric Power
  • Hydraulic Component Manufacturing
  • Naval and Commercial Ship repair
  • Heavy Equipment Manufacturing
  • Non-Woven Manufacturing
  • Oil & Gas Generation
  • Aerospace
  • Transportation
  • Construction
  • Mining & Aggregates

Our Precision Machine Shop

Since 1985, Western Machine Works has served Oregon, Washington, and the Pacific Northwest with precision machining for a wide range of industries. Located in Portland, Oregon, our 34,000 square foot facility, heavy lifting capabilities, and experienced team can handle any challenge you have.

We provide the highest quality precision roll grinding & balancing, machining, fabrication, welding, metallizing, and engineered solutions for our clients.

Precision Machining Projects

Precision Machining for Dewatering Press Screw

Precision Machining of Hydraulic Cylinder

SHip Shaft Precision Machining

Precision Machining of custom parts for refurbishing & repair

  • Propulsion hub, components, and shafts
  • Hydropower Equipment including turbine runners, shafts, wicket gates, bushings
  • Wind Turbine Main Bearing Assembly
  • Wind Turbine Main Shafts
  • Motor Shafts
  • Boiler Fan Shafts
  • Thrust Bearings
  • Bearing Housings
  • Rock Crushers
  • Process Rolls
  • Drums and Cylinders
  • Shredders and Shafts
  • Hydraulic Barrels
  • Pipe Sockets
  • Bushings and Flanges
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