Angular Contact Ceramic Ball Bearing H7011C-2RZ HQ1

The Angular Contact Ceramic Ball Bearing H7011C-2RZ HQ1 is a high-performance hybrid bearing engineered for precision CNC spindles and demanding industrial applications. Featuring silicon nitride (Si3N4) ceramic balls, this bearing offers lower density and higher hardness than steel alternatives, resulting in significantly reduced centrifugal force at high speeds. With a limiting speed of 26500 RPM (grease) and enhanced corrosion resistance, it is the ideal choice for maintenance-free, long-life rotating components.

Hybrid Ceramic Construction (Steel Rings + Ceramic Balls)
Contact Angle optimized for high-speed axial loads
2RZ Non-contact seals for low torque and protection
Superior wear resistance and electrical insulation
Handles combined radial and axial loads efficiently
High stiffness and rigidity for precision rotation

⚡ 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
MECHANICAL	weight: 0.38 kg \| sealingType: 2RZ (Non-contact rubber seal) \| precisionClass: P4 / HQ1
INSIDE DIAMETER	55 mm
OUTSIDE DIAMETER	90 mm
WIDTH DIMENSION	18 mm
MAX SPEED GREASE	26500 RPM
BASIC LOAD RATING CR	17 KN
BASIC LOAD RATING COR	14.5 KN
BEARING TYPE	Angular Contact Hybrid Ceramic
BALL MATERIAL	Ceramic (Silicon Nitride)
RING MATERIAL	High-Carbon Chromium Steel

Industrial Applications

Usage Scenario	Target Industry
High-Speed CNC Spindles	Aviation & Defense
Aerospace Turbines and Equipment	Automotive Manufacturing
Automotive High-Performance Components	Machine Tool Industry
Medical Precision Instruments	Renewable Energy (Wind Turbines)
High-Frequency Motors and Generators	Pharmaceutical Machinery
Industrial Vacuum Pumps	General Engineering

Technical FAQ & Operational Guide

What are the benefits of ceramic balls in H7011C bearings?

Ceramic balls are 40% less dense than steel, reducing centrifugal force and heat generation at high speeds, which allows for a higher RPM and longer bearing life.

Can this bearing handle both radial and axial loads?

Yes, as an angular contact bearing, it is specifically designed to handle combined loads, though it must be installed in a pair or pre-loaded for pure axial stability.

What does the 2RZ designation mean?

2RZ indicates that the bearing has non-contact rubber seals on both sides, which provides protection against contaminants while maintaining low friction for high speeds.

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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Angular Contact Ceramic Ball Bearing H7011C-2RZ HQ1

Hybrid Ceramic Construction (Steel Rings + Ceramic Balls)

Contact Angle optimized for high-speed axial loads

2RZ Non-contact seals for low torque and protection

Superior wear resistance and electrical insulation

Handles combined radial and axial loads efficiently

High stiffness and rigidity for precision rotation

⚡ Quick Technical Datasheet:

Power OutputN/A

Max SpeedN/A

Voltage RatingN/A

Collet InterfaceER Standard

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 Parameter

Engineering Specification Value

MECHANICAL

weight: 0.38 kg | sealingType: 2RZ (Non-contact rubber seal) | precisionClass: P4 / HQ1

INSIDE DIAMETER

55 mm

OUTSIDE DIAMETER

90 mm

WIDTH DIMENSION

18 mm

MAX SPEED GREASE

26500 RPM

BASIC LOAD RATING CR

17 KN

BASIC LOAD RATING COR

14.5 KN

BEARING TYPE

Angular Contact Hybrid Ceramic

BALL MATERIAL

Ceramic (Silicon Nitride)

RING MATERIAL

High-Carbon Chromium Steel

Usage Scenario

Target Industry

High-Speed CNC Spindles

Aviation & Defense

Aerospace Turbines and Equipment

Automotive Manufacturing

Automotive High-Performance Components

Machine Tool Industry

Medical Precision Instruments

Renewable Energy (Wind Turbines)

High-Frequency Motors and Generators

Pharmaceutical Machinery

Industrial Vacuum Pumps

General Engineering