Gros-Ite Precision Spindle






Gros-Ite Spindle has been a trusted, highly-respected name in engineered products and assemblies, including premium spindles, since 1946. 

They are not only known for Gros-Ite precision spindle design but their exceptional build and repair capabilities. EDAC/Grose-Ite Spindle has a global customer base, serving the aerospace, automotive, medical, industrial, commercial, and machine tool industries.

We are proud to welcome this enduring, highly-respected brand to our Superior Spindle family.

Spindle New Product Development

Gros-Ite Spindle utilizes high-precision off-the-shelf bearings in their variable preload system. That mitigates the physical liability of angular contact type of bearings.

The preload is varied to ensure optimal operating capacity. As a result, it minimizes vibration while maximizing spindle stiffness.

They have also developed a patented composite material spindle, housing, and shaft insert for optimal performance. Benefits include:

  • Reduced weight of the spindle
  • Reduced static deflection at the nose
  • Reduced thermal axial expansion 
  • Increased static and dynamic stiffness
  • Increased vibration dampening
  • Improved critical speed range

One of the standout products Gros-Ite developed is the Holo-Rol™ Bearings. These feature hollow cylindrical rollers preloaded in the bearing instead of solid rollers.

Holo-Rol™ Bearings are leveraged for a wide variety of machine tool spindles or workhead spindles and have been used for over two decades in centerless grinders.

They provide several advantages over regular bearings, such as:

  • Higher speed capability
  • High radial stiffness
  • Very low radial runout
  • Vibration damping

Spindle Service Since 1985

1985 saw the founding of EDAC Machinery /Gros-Ite Precision Engineered Spindles. EDAC Machinery sets the standard for advanced grinding and process engineering.

Benefits of Superior Spindle

Superior Spindle is an ISO 9001:2015 certified for the repair and remanufactures of machine tool spindles. We are dedicated to providing the highest quality spindle repair, replacement, and rebuild services for a wide variety of industries, including but not limited to: 

  • Aerospace
  • Agriculture
  • Appliance
  • Automotive
  • Defense
  • Die manufacturing
  • Heavy truck
  • Heavy construction equipment
  • Machine tool
  • Medical
  • Mold
  • Optical
  • Railroad

The benefits of choosing Superior Spindle go beyond providing exceptional services, including standard or expedited repair, to our extensive list of serviced brands. 

We offer worry-free warehousing and storage in our state-of-the-art 25,000-square-foot facility, designed to house your spindles safely for repair or remanufacture. This convenient, streamlined service is intended for the benefit of our customers and is not offered by most competitors. 

Our warranty is equal to the original OEM warranty up to 365 days from the day of shipment. Our industry-leading inspection and testing process encompass:

  • Evaluation and teardown
  • Geometric inspection
  • Machining and balancing
  • Cleanroom testing and assembly
  • Complete run-in testing
  • Final reporting

By combining our industry-leading services with those of the highly-respected expertise, experience, and benefits of EDAC/Gros-Ite Spindle, we are confident the synergy will be unparalleled. 


State of the Art Services, Superior Spindle can resolve all of your Spindle Repair and Remanufacturing requirements.

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