320.253.2699 sales@c4weld.com

World-Class Machine Center

Machine Shop

The vertical integration of our engineering services with C4’s precision manufacturing services helps prevent time‐wasting communication stop points for clarifications and can dramatically reduce wait times between project steps. We have a well‐equipped fabrication and machining shop able to handle part production for a wide variety of pre‐ and post‐welding processes.

We can eliminate your need for separate specialized vendors – and the time spent on shipments – with both critical‐grade welding capabilities and precision machining and fabrication services under one roof.

  • Multiple high‐capacity overhead cranes for material movement between bays
  • Oversized door truck access to fabrication and machining bays
  • Sheet and plate metal rolling, shearing and braking
  • Large capacity stress relief oven
  • CNC shape cutting, plasma & oxy‐fuel

Large Part Machining

Increased customer demand for larger and larger welded and machined structures led C4 to bring world-class large part precision machining capabilities to our shop floor with the installation of a SNK RB6M Double Column Multi-Center.  

SNK has manufactured Double Column Machining Centers for over 50 years, with over 5,000 units installed world-wide. RB-M Series Machining Centers deliver productive 5-face, single set-up machining. The rigid double column design and construction assures peak precision and excellent work envelope access. This machine has both an automatic tool changer and right-angle attachment changer. In addition to X,Y & Z axes, a CNC-controlled 4th axis (W) expands machining capability and provides exceptional rigidity for rigorous cutting conditions. The generous quill stroke (Z) allows exceptional access to cavities simplifying deep hole cutting.

The addition of this machine allows C4 to service our customer’s needs better with shorter lead times, increased project control, and fewer associated logistics challenges. C4 has acquired highly-experienced large part programmers/machinists dedicated to supporting this new mill.

Small Part Machining

It all has to fit. CNC small part machining requires precision and accuracy. C4 Welding has the proven experience and expertise to move your small parts from design and into production. The machine shop is complete with vertical and horizontal turning machines, CNC tool room mills and lathes. Most importantly, our team of experienced programmers machinists makes C4 one of the top contract manufacturing companies in Minnesota.  

Inside The Machine Shop

We have a well‐equipped fabrication and machining shop able to handle part production for a wide variety of pre‐ and post‐welding processes.

  • SNK RB6M Bed Mill
    • Axis Travels
      • X 324.8″ Y 153.5″ W 63.0″ Z 31.4″
    • Table Load Capacity: 66,000#
    • 5-Face Machining
    • Renishaw RMP 600 Probe
  • Mori Seiki SL-35 Lathe
    • 16″ Swing
    • 30″ Between Centers
  • Faro Laser Tracker Vantage
    • Measurement Envelope Distance: 40 Meters
    • Range of Horizontal Angle: 360 Degrees
    • Range of Vertical Angle: 130 Degrees (+77.9/-52.1)
    • Accuracy:
      • Per ASME B89.4.19-2006 Standard (MPE)
      • Absolute Distance Meter (ADM) eADM 16μm L + 0.8μm/m
      • R0 Parameter (R0) eRO 16μm
      • Transverse eR 20μm L + 5μm/ m
  • YCM 1680A
    • Vertical Machining Center
    • Axis Travels
      • X 64″ Y 30″ Z 27″
    • with 4th Axis
  • YCM 76A
    • Vertical Machining Center
    • Axis Travels
      • X 30″ Y 20″ Z 22″
  • SWI DPM S3
    • CNC Tool Room Mill
    • Axis Travels
      • X 30″ Y 17″ Z 22″
  • PM 1640 Manual Lathe
    • 16″ Diameter
    • 40″ Between Centers

Tell us About Your Next Project

Our dedicated and knowledgeable team’s welding, machining and manufacturing experiences allows us to manage and build your projects on time while keeping your specifications in mind.
Ready to begin

Value Engineering

Cost-Reduction Analysis & Design

Critical Welding

National Reputation for Weld Excellence

Performance Testing

Products Tested to Expected Performance

NDE Inspection

Evaluation without affecting serviceability

About C4 Welding, Inc

C4’s original owner focused his business activities on providing high‐precision “critical” welding services. The portfolio of former and current customer projects is a roster of leading companies across many industries.

Over the years, C4 has consistently added more and more depth to our solutions, including large and small part machining services, manufacturing engineering, mechanical design, assembly, OEM manufacturing, and fabrication services. After the purchase of the Company from the original owner in 2013, C4 has accelerated the range of in-house manufacturing and engineering capabilities with the purchase of a 5 axis bridge mill, 2 vertical machining centers, manual lathes, the installation of a paint booth and more, we can handle your project in house from start to finish.

Contact Us

Street Address: 11 Industrial Blvd. | Sauk Rapids, MN 56379 USA

Phone: 320.253.2699 | Fax: 320.253.4804

Sales-Related Inquiries: 320-253-2699 | Emailsales@c4weld.com

Human Resources-related Inquiries: 320-253-2699 | Emailhr@c4weld.com

Hours of OperationMonday – Friday: 8:00am – 4:00pm

You Ask, We'll Answer.

ISO 9001:2015 Certified Quality Systems


Street Address: 11 Industrial Blvd.

Sauk Rapids, MN 56379 USA


Main Phone: 320.253.2699

Fax: 320.253.4804


Sales-Related Inquiries: 320-253-2699 

Email: sales@c4weld.com


Human Resources-related Inquiries:

320-253-2699 Email: hr@c4weld.com



C4 Welding, Inc. BBB Business Review