7400D Series

7400-D series double-row tapered roller bearings, ultra-high load capacity, heavy-duty design, for rolling mills, crushers, large industrial equipment. Full models in stock, OEM & brand replacement supported.

Classification :

Angular Contact Ball Bearings

Keywords :

7400-D series double-row tapered roller bearings 7400-D heavy duty tapered roller bearings double row tapered roller bearings for rolling mills ultra high load capacity tapered roller bearings

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📝 Category Detail

7400-D series are heavy-duty double-row tapered roller bearings engineered for extreme radial and axial combined loads in harsh industrial environments. Featuring a integrated double-row tapered roller structure, these bearings deliver exceptional load capacity, high rigidity, and impact resistance, far exceeding single-row tapered roller bearings. They are specifically designed for heavy machinery applications where ultra-high load, shock resistance, and long service life are critical.

Manufactured from premium GCr15 (100Cr6) high-carbon chromium bearing steel with advanced heat treatment and precision machining, these bearings ensure excellent wear resistance, dimensional stability, and reliable performance under continuous heavy-duty operation. The double-row design supports bidirectional axial load bearing, eliminating the need for paired installation, simplifying structure and improving system stability.

All models feature standard metric dimensions, fully interchangeable with international brands, with complete stock coverage for fast global delivery and OEM customization support.

🔥 Complete Model & Dimension Table (mm)

Bearing Number	d (mm)	D (mm)	B (mm)	Bearing Number	d (mm)	D (mm)	B (mm)
7403-D	17	62	34	7404-D	20	72	38
7405-D	25	80	42	7406-D	30	90	46
7407-D	35	100	50	7408-D	40	110	54
7409-D	45	120	58	7410-D	50	130	62
7411-D	55	140	66	7412-D	60	150	70
7413-D	65	160	74	7414-D	70	180	84
7415-D	75	190	90	7416-D	80	200	96
7417-D	85	210	104	7418-D	90	225	108
7419-D	95	250	110	7420-D	100	265	120
7421-D	105	290	130	7422-D	110	320	140

✅ Key Features

Ultra-high load capacity for extreme radial & axial combined loads
Double-row structure for bidirectional axial load bearing, high rigidity
Superior impact & vibration resistance for harsh industrial environments
Premium GCr15/100Cr6 steel for long service life & wear resistance
Standard metric dimensions for global interchangeability
Integrated design, no need for paired installation, simplify system structure
Suitable for continuous heavy-duty operation, low maintenance

🎯 Application Scenarios

Cold/hot rolling mills, metallurgical equipment
Large crushers, mining machinery, vibrating screens
Heavy construction machinery, large cranes, hoists
Large agricultural machinery, harvesters
Heavy industrial gearboxes, reducers, large pumps & compressors

Category Overview

Angular Contact Ball Bearings are designed with contact angles between the balls and raceways, enabling them to carry combined radial and axial loads simultaneously as well as unidirectional thrust loads. With high rigidity, high running accuracy, and high-speed performance, they are widely used in precision machinery, machine tools, pumps, motors, and equipment requiring precise axial positioning.We supply single-row, double-row, and matched bearing configurations to meet different precision, speed, and load requirements.

Our Series Breakdown

We offer a complete range of angular contact ball bearing series for various industrial applications:

Series	Features	Typical Applications
7000 Series	Thin section, high precision, high speed, compact	Spindles, small precision machinery, high-speed motors
7200 Series	Medium size, general-purpose, good rigidity	Pumps, compressors, gearboxes, general machinery
7300 Series	Larger size, higher load capacity, strong rigidity	Heavy machinery, large reducers, crushers, machine tools
3200 / 3300 Series	Double row, high combined load capacity, self-aligning to a certain extent	Automotive wheels, agricultural machinery, lifting equipment

Core Advantages

Support combined radial and axial loads in one direction
High running accuracy and high-speed stability
High rigidity and good anti-friction performance
Can be arranged in universal matching (DB, DF, DT) for different load conditions
Available in open, sealed, and precision grades (P0, P6, P5, P4)

Typical Applications

Widely used in machine tool spindles, high-speed motors, pumps, compressors, automotive wheel hubs, gearboxes, agricultural machinery, lifting equipment, textile machinery, and other precision transmission equipment.

PRODUCT TESTING

Bearing Forging

Bearing Annealing

Turning Process

Quenching

Bearing Assembly

Bearing Clearance Testing

Grease injection

Bearing Marking

Angular Contact Ball Bearings