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Motorized Spindles

A Gilman motorized spindle


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For Every Machining and Rotational Need.

Gilman Precision’s Mech-Tronix integral motor and RMC high-speed spindles will give your traditional and CNC machining processes more power, variable speed, and tool-connection choices for advanced applications.

Our motorized spindles are designed and manufactured to meet the most demanding technical requirements. All components guarantee high levels of reliability and have been designed to enable maintenance work to be carried out quickly and efficiently. Optional capabilities include drives and cooling units.

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Mech-Tronix Integral Motor Spindles – Up to 11,800 RPMs

Standard Mech-Tronix Options
All low-rpm spindles can provide up to 133 in.-lbs. of torque.
34 lbs. maximum thrust 46 lbs. maximum thrust
67 lbs. maximum thrust 70 lbs. maximum thrust
92 lbs. maximum thrust 138 lbs. maximum thrust
139 lbs. maximum thrust 289 lbs. maximum thrust
290 lbs. maximum thrust 655 lbs. maximum thrust
Custom Mech-Tronix Options
  • Complete spindle systems
    • Spindle (open loop)
    • Matched drive (open loop)
    • Matched chiller for liquid cooled spindles
  • Standard tool interface
    • Boring
    • HSK
    • NMTB
  • Four bearing structures for speed and thrust capabilities
  • 100 lb. to 3,790 lb. thrust capacity  
  • Up to 11,800 RPM
  • Up to 20 horsepower (S1 Duty)

Please visit our resource section for catalogs and CAD drawings on our complete and customizable line of spindle products.


RMC High-Speed Spindles – Up to 260,000 RPMs

CNC spindlesRMC manufactures customized high-speed spindles. Through dynamically balanced components that are made of hardened steel to prevent wear and accuracy deterioration, RMC is able to provide precision, accuracy, and reliability up to 260,000 RPMs.

High-Speed Grinding Spindles
RMC’s grinding spindles guarantee:

  • high performance
  • low operating temperatures
  • compact size
  • low vibration levels

Available options include:

  • speed sensors
  • grinding wheel refrigeration
  • quick-grinding wheel change out
  • balancing system
  • acoustic sensors

Grinding spindles require a combination of highly rigid bearings and low-heat-generation motors for smooth operation at all speeds. Our spindles include squirrel-cage motors allowing for a compact size and low vibration levels.

High-Speed Milling Spindles
Our high-speed milling spindles are optimized for stiffness, performance, and durability in various traditional and CNC machining applications.

Spindles come with:

  • high-efficiency synchronous and asynchronous motors
  • temperature sensors
  • cooled with internal or external liquid recirculation
  • grease or minimal air-oil lubrication systems are available
  • bearings with ceramic balls and special steel inner and outer rings

Tool attachments can be ISO, SK, ANSI, BTI, HSK, or CAPTO with an automatic tool change capability controlled by inductive or capacitive integrated sensors, and hydraulic or pneumatic cylinders. Shaft positioning control for tool change or hard tapping operations is performed by an encoder adapted to the customer drive system or by using an incremental resolver.

Case Study

A major aircraft engine manufacturer wanted to upgrade to a Mech-Tronix spindle on its OM-3 and OM-4 Sundstand Omnimills (5-axis machining centers with a 150-degree tilting head). The material being machined was Inconel, titanium, and other aerospace alloys. Learn more →





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