FLUID END MACHINING

Precision Machining For Frac Blocks and Fluid Ends.

Fluid end machining is a specialty focus of Mantz Automation. Our fluid end machining division serves the oil and gas industry with precision machining for frac blocks and fluid ends. Mantz has experience machining hundreds of fluid end styles from many OEMs and works with a variety of material types, including:


  • 15-5
  • 17-4
  • 4330
  • 13-8


With years of oil and gas industry knowledge, Mantz provides a single-source machining option for customers seeking precision-machined frac blocks and fluid end components.


cnc machines

Andrew Theoharis

Frac Sales Manager

With 38 years of hands-on machining experience, Andy brings a rare combination of deep technical mastery and practical leadership to high-precision, high-demand manufacturing environments. He began his career through a formal moldmaking apprenticeship program, earning journeyman credentials and building a strong foundation in precision manufacturing. As a master machinist by trade, his background spans contract machining and tool-and-die / plastic injection mold manufacturing, with extensive experience in complex 3D and 5-axis machining. However, his true passion is the Fluid End manufacturing business. With 19 years Sales and Supervisory experience within the oil and gas industry, he knows it very well.


At Mantz Automation, Andrew focuses on delivering high-quality, precision-machined solutions, supporting customers through technical expertise, process efficiency, and a commitment to consistent performance in demanding applications.


Frequently Asked Questions

  • What is fluid end machining?

    Fluid end machining is the precision machining of fluid ends and frac blocks used in the oil and gas industry.

  • What types of components does Mantz Automation machine?

    Mantz Automation provides precision machining for frac blocks and fluid ends.

  • What industries does Mantz serve with fluid end machining?

    Mantz serves the oil and gas industry through its fluid end machining division.



  • How much experience does Mantz have with fluid end machining?

    Mantz has experience machining hundreds of different fluid end styles from many OEMs.



  • What materials does Mantz work with?

    Mantz has experience working with material types including 15-5, 17-4, 4330, and 13-8.

  • Yes. Mantz has experience machining hundreds of fluid end styles from many OEMs.

    Engineering can identify potential issues before manufacturing begins, helping improve tool longevity, molding efficiency, manufacturability, and overall project reliability.

  • Who can I contact about a fluid end machining project?

    Andrew Theoharis, Mantz’s Frac Sales Manager, can assist with fluid end machining inquiries. He has 38 years of hands-on machining experience and 19 years of sales and supervisory experience in the oil and gas industry.


    Contact Andrew at atheoharis@mantzautomation.com.

Need Fluid End Machining Services?

We have open capacity now and throughout 2026. Contact us today for a quote and tour of our world-class facility!