Angular Contact Ceramic Ball Bearing H7008C-2RZ HQ1

The H7008C-2RZ HQ1 is a premium hybrid angular contact ball bearing engineered for high-performance spindle applications requiring extreme rotational accuracy. By integrating aerospace-grade Silicon Nitride (Si3N4) ceramic balls with high-carbon chrome steel rings, this bearing achieves a grease-lubricated limiting speed of 36,700 RPM. The ceramic material is 58% lighter than steel, which significantly reduces centrifugal force and heat generation at high speeds. With a 40mm bore and 68mm outside diameter, it offers a high basic dynamic load rating of 12.5 KN, making it an ideal choice for high-speed CNC milling spindles, industrial robotics, and aerospace instrumentation where thermal stability and low vibration are critical.

Hybrid Silicon Nitride (Si3N4) Ceramic Ball construction
40mm Bore x 68mm OD x 15mm Width
Ultra-high limiting speed (36,700 RPM)
High-speed 2RZ non-contact shielding
12.5 KN Basic Dynamic Load capacity
Advanced P4 Grade precision for machining accuracy

⚡ 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: approx 0.18 kg \| sealingType: 2RZ (Non-contact) \| precisionClass: P4 / HQ1
INSIDE DIAMETER	40 mm
OUTSIDE DIAMETER	68 mm
WIDTH DIMENSION	15 mm
MAX SPEED GREASE	36700 RPM
BASIC LOAD RATING CR	12.5 KN
BASIC LOAD RATING COR	9.1 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-Speed CNC Milling and Routing Spindles	Precision Engineering and Tooling
Industrial Robotics and Automated Systems	Aerospace and Defense
High-Frequency Electric Motors	Automotive Manufacturing
Aerospace Gyroscopes and Precision Instruments	Industrial Automation
Automotive Turbochargers and Performance Engines	Electronics and Research Facilities
Semiconductor Manufacturing Equipment	General Engineering

Technical FAQ & Operational Guide

What makes the HQ1 designation important for this bearing?

The HQ1 designation signifies that the bearing is fitted with high-precision ceramic balls, ensuring superior performance and reliability in extreme speed and precision environments.

Is this bearing suitable for applications with electrical currents?

Yes. Silicon Nitride ceramic balls are electrical insulators, which prevents electrical pitting and arcing damage common in electric motors and spindles.

Does the 2RZ seal limit the speed of the bearing?

No. The 2RZ seal is a non-contact design. It provides effective protection against contaminants without creating the friction associated with contact seals, allowing the bearing to maintain its high limiting speed of 36,700 RPM.

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 H7008C-2RZ HQ1

Hybrid Silicon Nitride (Si3N4) Ceramic Ball construction

40mm Bore x 68mm OD x 15mm Width

Ultra-high limiting speed (36,700 RPM)

High-speed 2RZ non-contact shielding

12.5 KN Basic Dynamic Load capacity

Advanced P4 Grade precision for machining accuracy

⚡ 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: approx 0.18 kg | sealingType: 2RZ (Non-contact) | precisionClass: P4 / HQ1

INSIDE DIAMETER

40 mm

OUTSIDE DIAMETER

68 mm

WIDTH DIMENSION

15 mm

MAX SPEED GREASE

36700 RPM

BASIC LOAD RATING CR

12.5 KN

BASIC LOAD RATING COR

9.1 KN

BEARING TYPE

Angular Contact Hybrid Ceramic

BALL MATERIAL

Silicon Nitride (Si3N4)

RING MATERIAL

High-Carbon Chrome Steel (GCR15)

Usage Scenario

Target Industry

High-Speed CNC Milling and Routing Spindles

Precision Engineering and Tooling

Industrial Robotics and Automated Systems

Aerospace and Defense

High-Frequency Electric Motors

Automotive Manufacturing

Aerospace Gyroscopes and Precision Instruments

Industrial Automation

Automotive Turbochargers and Performance Engines

Electronics and Research Facilities

Semiconductor Manufacturing Equipment

General Engineering