Angular Contact Ceramic Ball Bearing H7005C-2RZ HQ1

The H7005C-2RZ HQ1 is a high-performance hybrid angular contact ball bearing engineered for precision industrial applications requiring extreme rotational speeds and thermal stability. By combining high-carbon chrome steel rings with aerospace-grade Silicon Nitride (Si3N4) ceramic balls, this bearing achieves a grease-lubricated limiting speed of 55,000 RPM. The 25mm bore and 47mm outside diameter make it the industry standard for high-frequency CNC spindles, precision robotics, and high-performance electric motors. Ceramic balls are 58% lighter than steel, significantly reducing centrifugal forces and friction-induced heat at high velocities. Certified to P4/HQ1 precision standards, this 70-gram bearing offers exceptional wear resistance and electrical insulation, ensuring long-lasting reliability in demanding machining environments.

Hybrid Silicon Nitride (Si3N4) Ball technology
25mm Bore x 47mm OD x 12mm Width
High-speed limiting speed (55,000 RPM)
Precision P4 Grade for industrial accuracy
8.4 KN Basic Dynamic Load (Cr) rating
High-efficiency 2RZ non-contact seals

⚡ 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: 0.07 kg \| sealingType: 2RZ (Non-contact) \| precisionClass: P4 / HQ1
INSIDE DIAMETER	25 mm
OUTSIDE DIAMETER	47 mm
WIDTH DIMENSION	12 mm
MAX SPEED GREASE	55000 RPM
BASIC LOAD RATING CR	8.4 KN
BASIC LOAD RATING COR	4.8 KN
BEARING TYPE	Angular Contact Hybrid Ceramic
BALL MATERIAL	Silicon Nitride (Si3N4)
RING MATERIAL	High-Carbon Chrome Steel (GCR15)

Industrial Applications

Usage Scenario	Target Industry
High-Frequency Industrial CNC Spindles	Machine Tool Manufacturing
Precision Robotics and Automated Arms	Industrial Automation and Robotics
High-Performance Electric Motor Shafts	Electronics and PCB Manufacturing
Advanced Prototyping and Tooling Centers	Aerospace and Defense Engineering
Medical and Laboratory Centrifuges	Precision Medical Device Production
Aerospace Rotating Components	General Engineering

Technical FAQ & Operational Guide

What is the limiting speed of the H7005C-2RZ HQ1?

This hybrid ceramic bearing is designed for a grease-lubricated limiting speed of up to 55,000 RPM.

Why are ceramic balls better for 25mm spindles?

At 55,000 RPM, steel balls generate significant centrifugal force and heat. Ceramic balls are much lighter and harder, reducing these forces and heat build-up, which prevents thermal expansion and bearing failure.

Is this bearing suitable for electric spindles?

Yes. Silicon Nitride ceramic is naturally non-conductive. This prevents electrical pitting (erosion) of the bearing raceways caused by stray currents in electric motors and spindles.

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 H7005C-2RZ HQ1

Hybrid Silicon Nitride (Si3N4) Ball technology

25mm Bore x 47mm OD x 12mm Width

High-speed limiting speed (55,000 RPM)

Precision P4 Grade for industrial accuracy

8.4 KN Basic Dynamic Load (Cr) rating

High-efficiency 2RZ non-contact seals

⚡ 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: 0.07 kg | sealingType: 2RZ (Non-contact) | precisionClass: P4 / HQ1

INSIDE DIAMETER

25 mm

OUTSIDE DIAMETER

47 mm

WIDTH DIMENSION

12 mm

MAX SPEED GREASE

55000 RPM

BASIC LOAD RATING CR

8.4 KN

BASIC LOAD RATING COR

4.8 KN

BEARING TYPE

Angular Contact Hybrid Ceramic

BALL MATERIAL

Silicon Nitride (Si3N4)

RING MATERIAL

High-Carbon Chrome Steel (GCR15)

Usage Scenario

Target Industry

High-Frequency Industrial CNC Spindles

Machine Tool Manufacturing

Precision Robotics and Automated Arms

Industrial Automation and Robotics

High-Performance Electric Motor Shafts

Electronics and PCB Manufacturing

Advanced Prototyping and Tooling Centers

Aerospace and Defense Engineering

Medical and Laboratory Centrifuges

Precision Medical Device Production

Aerospace Rotating Components

General Engineering