Angular Contact Steel Ball Bearing 7024AC-2RZ DBB

The Angular Contact Steel Ball Bearing 7024AC-2RZ DBB is a high-performance industrial bearing engineered for large-scale machining centers and heavy-duty electric motors. Featuring a significant 120mm bore and 180mm outside diameter, this model is built from premium high-carbon chrome steel to ensure maximum rigidity under combined radial and axial loads. The 'AC' contact angle is specifically optimized for enhanced thrust load capacity, while the 2RZ double rubber non-contact seals provide an excellent balance between high-speed performance (up to 8,700 RPM) and protection against industrial contaminants. As a P4 grade component, it delivers the rotational accuracy and stability necessary for large-bore CNC spindles, ensuring minimal thermal expansion and prolonged machine life.

Hardened high-carbon chrome steel rings and balls
120mm Bore x 180mm OD x 28mm Width
2RZ non-contact rubber seals for thermal efficiency
Enhanced AC contact angle for increased thrust capacity
Limiting speed of 8,700 RPM (Grease Lubrication)
Engineered for high-rigidity and low-vibration operation

⚡ 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 2.10 kg \| sealingType: 2RZ (Double non-contact seal) \| precisionClass: P4 / DBB
INSIDE DIAMETER	120 mm
OUTSIDE DIAMETER	180 mm
WIDTH DIMENSION	28 mm
MAX SPEED GREASE	8700 RPM
BASIC LOAD RATING CR	54.8 KN
BASIC LOAD RATING COR	61.5 KN
BEARING TYPE	Angular Contact Steel Ball
BALL MATERIAL	Hardened Chrome Steel (GCR15)
RING MATERIAL	High-Carbon Steel

Industrial Applications

Usage Scenario	Target Industry
Large-Scale CNC Spindle Assemblies	Machine Tool Manufacturing
Heavy-Duty Industrial Motors and Generators	Steel and Metal Processing
Vertical and Horizontal Machining Center Spindles	Automotive and Heavy Engineering
Industrial Gearboxes and Power Transmissions	Aerospace Manufacturing
Aerospace and Defense Test Rigs	General Industrial Automation
Precision Rolling Mill Equipment	General Engineering

Technical FAQ & Operational Guide

What is the speed limit for the 7024AC-2RZ DBB bearing?

This large-bore precision bearing is rated for a grease-lubricated limiting speed of 8,700 RPM, optimized for heavy-duty industrial spindles.

What is the advantage of the AC contact angle in this 120mm model?

The AC contact angle provides higher axial stiffness and load capacity compared to the standard C-type angle, making it ideal for spindles that encounter significant thrust during heavy machining.

What are the exact dimensions for the 7024 model?

The 7024AC-2RZ DBB has an inside diameter of 120mm, an outside diameter of 180mm, and a width of 28mm.

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 Steel Ball Bearing 7024AC-2RZ DBB

Hardened high-carbon chrome steel rings and balls

120mm Bore x 180mm OD x 28mm Width

2RZ non-contact rubber seals for thermal efficiency

Enhanced AC contact angle for increased thrust capacity

Limiting speed of 8,700 RPM (Grease Lubrication)

Engineered for high-rigidity and low-vibration operation

⚡ 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 2.10 kg | sealingType: 2RZ (Double non-contact seal) | precisionClass: P4 / DBB

INSIDE DIAMETER

120 mm

OUTSIDE DIAMETER

180 mm

WIDTH DIMENSION

28 mm

MAX SPEED GREASE

8700 RPM

BASIC LOAD RATING CR

54.8 KN

BASIC LOAD RATING COR

61.5 KN

BEARING TYPE

Angular Contact Steel Ball

BALL MATERIAL

Hardened Chrome Steel (GCR15)

RING MATERIAL

High-Carbon Steel

Usage Scenario

Target Industry

Large-Scale CNC Spindle Assemblies

Machine Tool Manufacturing

Heavy-Duty Industrial Motors and Generators

Steel and Metal Processing

Vertical and Horizontal Machining Center Spindles

Automotive and Heavy Engineering

Industrial Gearboxes and Power Transmissions

Aerospace Manufacturing

Aerospace and Defense Test Rigs

General Industrial Automation

Precision Rolling Mill Equipment

General Engineering