Angular Contact Steel Ball Bearing 7020AC-2RZ DBB

The Angular Contact Steel Ball Bearing 7020AC-2RZ DBB is a high-performance solution for large-scale industrial machinery requiring exceptional radial and axial load capacities. Featuring a 100mm bore and 150mm outer diameter, this bearing is constructed from premium hardened chrome steel to ensure maximum structural integrity. The 'AC' contact angle is specifically optimized to support higher axial loads compared to standard 'C' type bearings, while the 2RZ non-contact rubber seals provide effective protection against contaminants without sacrificing speed. Ideal for heavy-duty CNC spindles and high-power motors, it ensures precision and stability in the most demanding mechanical environments.

High-strength hardened chrome steel construction
100mm Bore x 150mm OD x 24mm Width
2RZ non-contact seals for speed and protection
Optimized AC contact angle for high axial load
Limiting speed of 10400 RPM (Grease)
Engineered for low-vibration and high-rigidity

⚡ 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 1.35 kg \| sealingType: 2RZ (Non-contact seal) \| precisionClass: P4 / DBB
INSIDE DIAMETER	100 mm
OUTSIDE DIAMETER	150 mm
WIDTH DIMENSION	24 mm
MAX SPEED GREASE	10400 RPM
BASIC LOAD RATING CR	42.7 KN
BASIC LOAD RATING COR	44.7 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	Heavy Machine Tool Manufacturing
High-Power Industrial Electric Motors	Steel and Metal Processing
Large-Scale Milling and Lathe Spindles	Automotive Production Lines
Industrial Gearboxes and Power Transmissions	Aerospace and Defense
Metal Processing and Rolling Mills	General Industrial Engineering
Large Robotic Base Rotations	General Engineering

Technical FAQ & Operational Guide

What is the speed limit for the 7020AC-2RZ DBB bearing?

This heavy-duty bearing is designed for high-load applications with a grease-lubricated limiting speed of 10400 RPM.

What is the difference between C and AC contact angles for the 7020 series?

The AC version features a larger contact angle, which increases the bearing's axial load-carrying capacity, making it superior for spindles experiencing high thrust loads.

What are the exact dimensions of this model?

The 7020AC-2RZ DBB has an inside diameter of 100mm, an outside diameter of 150mm, 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 7020AC-2RZ DBB

High-strength hardened chrome steel construction

100mm Bore x 150mm OD x 24mm Width

2RZ non-contact seals for speed and protection

Optimized AC contact angle for high axial load

Limiting speed of 10400 RPM (Grease)

Engineered for low-vibration and high-rigidity

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

INSIDE DIAMETER

100 mm

OUTSIDE DIAMETER

150 mm

WIDTH DIMENSION

24 mm

MAX SPEED GREASE

10400 RPM

BASIC LOAD RATING CR

42.7 KN

BASIC LOAD RATING COR

44.7 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

Heavy Machine Tool Manufacturing

High-Power Industrial Electric Motors

Steel and Metal Processing

Large-Scale Milling and Lathe Spindles

Automotive Production Lines

Industrial Gearboxes and Power Transmissions

Aerospace and Defense

Metal Processing and Rolling Mills

General Industrial Engineering

Large Robotic Base Rotations

General Engineering