Angular Contact Ceramic Ball Bearing H7004C-2RZ HQ1

The Angular Contact Ceramic Ball Bearing H7004C-2RZ HQ1 represents the pinnacle of high-speed mechanical rotation technology, meticulously engineered for demanding CNC spindle applications that dictate extreme positional precision and minimal thermal friction. Utilizing premium silicon nitride (Si3N4) ceramic balls paired with high-grade steel raceways, this hybrid ceramic bearing yields substantial advantages over standard steel elements, including lower centripetal forces, drastically reduced heat generation, and superior wear resistance under rigorous operational cycles. Featuring an optimized 15-degree contact angle (C profile), it facilitates fluid management of simultaneous radial and axial vector forces, preserving near-zero runout tolerances at an extreme grease-lubricated limiting speed of 61,900 r/min. To extend service life within harsh woodworking router or high-velocity metal milling environments, the assembly is outfitted with double non-contact rubber seals (2RZ) that retain premium high-speed synthetic grease while barring entry to fine dust, airborne particulates, and liquid coolant spray. The HQ1 designation guarantees precision-matched engineering balancing, making this bearing the definitive solution for high-frequency motorized spindle overhauls requiring long-term operational consistency.

Hybrid ceramic design using silicon nitride balls for high-speed performance up to 61,900 r/min
Substantially reduced thermal expansion and lower operational friction compared to all-steel bearings
Premium double rubber seals (2RZ) provide contamination protection while preserving high RPMs
Optimized 15-degree angular contact profile handles simultaneous radial and axial loads efficiently
High-grade carbon-chromium steel rings deliver excellent structural rigidity and stiffness
Ideal for high-frequency CNC spindles, precision automated robotics, and machining centers

⚡ Quick Technical Datasheet:

Power OutputN/A

Max SpeedN/A

Voltage RatingN/A

Collet InterfaceER Standard

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Comparative Technical Spindle Motor Configurations Matrix

Use the structural data catalog matrix below to evaluate power outputs, maximum RPM, operating voltages, and cooling styles across standard TriQuench CNC spindle models.

Spindle Capacity	Operating Speed	Operating Voltage	Cooling System
12.0 kW	18,000 RPM	380 V	Water-Cooled
0.8 kW	24,000 RPM	220 V	Air-Cooled (Long Shaft)
3.7 kW	40,000 RPM	380 V	Water-Cooled ISO20
9.0 kW	18,000 RPM	380 V	Air-Cooled

Technical Specifications

Technical Parameter	Engineering Specification Value
MODEL NUMBER	H7004C-2RZ HQ1
BEARING TYPE	Angular Contact Hybrid Ceramic Ball Bearing
PRECISION CLASS	P4 High-Precision Grade
CONTACT ANGLE	15 Degrees (C Profile)
DIMENSIONS	insideDiameter: 20 mm \| outsideDiameter: 42 mm \| width: 12 mm
LOAD RATINGS	basicDynamicLoad: 7.4 KN \| basicStaticLoad: 3.9 KN
MECHANICAL	limitingSpeedGrease: 61,900 r/min \| ballMaterial: Silicon Nitride Ceramic (Si3N4) \| ringMaterial: High-Rigidity Carbon-Chromium Bearing Steel \| sealingType: Double Rubber Sealed (2RZ Non-Contact) \| weight: 0.06 kg

Industrial Applications

Usage Scenario	Target Industry
High-Speed High-Frequency CNC Router Spindle Shaft Support Assembly	CNC Router and Industrial Precision Machine Tool Manufacturing
Vertical Machining Center (VMC) and High-Velocity Milling Axial Guidance Systems	Woodworking, Cabinetry, and Automated Panel Processing Workshops
Precision Robotics, Aerospace Actuators, and High-Performance Motion Control Gantry Rigs	High-Accuracy Tooling Manufacturing, Automotive Engineering, and Aerospace Assembly
Automated High-RPM Internal Grinding Machine Shaft Supports	Precision Electronics, Medical Equipment Engineering, and Advanced Component Testing Houses
High-Speed Lab Centrifuges and Advanced Industrial Engineering Turbo-Machinery	Industrial Spindle Repair Services and Spare Parts Distribution Centers

Technical FAQ & Operational Guide

What are the primary benefits of silicon nitride ceramic balls over steel balls in this spindle bearing?

Silicon nitride ceramic balls are 60% lighter and significantly harder than steel equivalents. This drastically reduces centrifugal forces at high RPMs, minimizes friction, lowers operational heat generation, and prevents micro-welding adhesion under high-stress tracking, leading to extended spindle lifespan at speeds up to 61,900 r/min.

What protection does the 2RZ seal suffix offer on an angular contact bearing?

The 2RZ suffix designates non-contact rubber shields on both sides of the bearing. These shields establish a reliable labyrinth barrier against micro-fine wood dust, metal chips, and vaporized cutting fluids while avoiding the direct surface contact friction of regular rubber seals, preserving the high velocity capabilities of the system.

Does this dynamic hybrid ceramic bearing arrive pre-lubricated from the factory?

Yes. This bearing arrives pre-packed with a calculated volume of ultra-premium high-speed synthetic grease sealed within its rolling tracks. To preserve the engineering integrity of the lubricating matrix, do not flush or clean the bearing prior to installation; ensure a pristine, contaminant-free environment during mounting.

How is the rotational balancing calibrated on this spindle motor?

Every spindle motor is dynamically balanced in accordance with the ISO 1940 balancing standard to guarantee vibration-free running and maximum stability at high RPMs.

What are the runout tolerances of the shaft and collet interface?

The internal shaft taper maintains a runout accuracy tolerance of under 0.003mm (3 microns), maintaining precise tool concentricity and preventing premature cutter wear.

What cooling precautions are built-in to prevent heat exhaustion?

Built-in temperature dissipation channels support continuous water/liquid cooling circulation or forced fan airflow, preventing thermal expansion of components.

Is this spindle motor compatible with standard VFD inverters and collets?

Yes, the spindle supports direct electrical integration with standard variable frequency drives (VFD) and accepts industrial ER collets (ER11, ER20, ER25, or ER32) to match standard toolholder dimensions.

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