Angular Contact Steel Ball Bearing 7018AC-2RZ DBB

The Angular Contact Steel Ball Bearing 7018AC-2RZ DBB is a robust solution for large-scale industrial machinery requiring high axial and radial load capacities. Featuring a 90mm bore and 140mm outer diameter, this bearing is constructed from high-grade steel for maximum durability in extreme environments. The 2RZ non-contact rubber seals provide excellent protection against contaminants while maintaining a high limiting speed of 11700 RPM, ensuring smooth operation in CNC spindles and high-speed motors.

High-strength hardened steel construction
90mm Bore x 140mm OD x 24mm Width
2RZ non-contact seals for thermal efficiency
AC contact angle for optimized axial load handling
Limiting speed of 11700 RPM (Grease)
Engineered for high-rigidity applications

⚡ 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 1.25 kg \| sealingType: 2RZ (Non-contact seal) \| precisionClass: P4 / DBB
INSIDE DIAMETER	90 mm
OUTSIDE DIAMETER	140 mm
WIDTH DIMENSION	24 mm
MAX SPEED GREASE	11700 RPM
BASIC LOAD RATING CR	34.3 KN
BASIC LOAD RATING COR	36.1 KN
BEARING TYPE	Angular Contact Steel Ball
BALL MATERIAL	Hardened Chrome Steel
RING MATERIAL	High-Carbon Steel

Industrial Applications

Usage Scenario	Target Industry
Heavy-Duty CNC Spindle Units	Machine Tool Manufacturing
High-Power Industrial Electric Motors	Heavy Engineering
Large-Scale Milling and Lathe Equipment	Automotive Production
Aerospace Propulsion Systems	Aerospace and Defense
Metal Processing Machinery	Steel and Metal Processing
Robotic Arm Base Rotations	General Engineering

Technical FAQ & Operational Guide

What is the speed limit for the 7018AC-2RZ DBB bearing?

This bearing is designed for high-load applications with a limiting speed of 11700 RPM when using grease lubrication.

Can the 7018AC-2RZ DBB handle heavy axial loads?

Yes, the AC contact angle is specifically engineered to support higher axial loads compared to standard C-type bearings.

What are the dimensions of this model?

The 7018AC-2RZ DBB has an inside diameter of 90mm, an outside diameter of 140mm, and a width of 24mm.

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 7018AC-2RZ DBB

High-strength hardened steel construction

90mm Bore x 140mm OD x 24mm Width

2RZ non-contact seals for thermal efficiency

AC contact angle for optimized axial load handling

Limiting speed of 11700 RPM (Grease)

Engineered for high-rigidity applications

⚡ 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 1.25 kg | sealingType: 2RZ (Non-contact seal) | precisionClass: P4 / DBB

INSIDE DIAMETER

90 mm

OUTSIDE DIAMETER

140 mm

WIDTH DIMENSION

24 mm

MAX SPEED GREASE

11700 RPM

BASIC LOAD RATING CR

34.3 KN

BASIC LOAD RATING COR

36.1 KN

BEARING TYPE

Angular Contact Steel Ball

BALL MATERIAL

Hardened Chrome Steel

RING MATERIAL

High-Carbon Steel

Usage Scenario

Target Industry

Heavy-Duty CNC Spindle Units

Machine Tool Manufacturing

High-Power Industrial Electric Motors

Heavy Engineering

Large-Scale Milling and Lathe Equipment

Automotive Production

Aerospace Propulsion Systems

Aerospace and Defense

Metal Processing Machinery

Steel and Metal Processing

Robotic Arm Base Rotations

General Engineering