3300 Series

3300 series double row angular contact ball bearings are non-separable and have a ball-loading notch on one side. It can bear large radial and axial bidirectional combined loads and moment loads mainly based on radial loads. It can limit the bidirectional axial displacement of the shaft or housing, and has better rigidity than single-row bearings. Bearings are available in open and sealed designs. Sealed bearings are maintenance-free and thus allow economical bearing arrangements.

Classification :

Angular Contact Ball Bearings

Keywords :

3300A series tapered roller bearings 3300A inch single-row tapered roller bearings 3315M tapered roller bearing 3320M heavy duty bearing 3310TA tapered roller bearing

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📝 Category Detail

3300A series (inch) are medium-to-heavy duty single-row tapered roller bearings engineered for high load capacity, stable rigidity, and precise axial positioning in demanding industrial applications. Following the inch standard system, this series features a separable cone & cup design, allowing for easy installation, adjustment, and maintenance—ideal for heavy-duty mechanical transmission systems.

Equipped with versatile cage and sealing options: ATN (nylon cage) for high-speed, low-noise operation; M (brass cage) for extreme load and impact resistance; TA (tapered roller) for specific precision applications. Constructed from premium GCr15 (100Cr6) bearing steel with advanced heat treatment, these bearings deliver exceptional wear resistance, dimensional stability, and long service life under continuous heavy-load conditions.

Full model coverage ensures global interchangeability, making the 3300A series a top choice for automotive aftermarket, agricultural machinery, construction equipment, and general industrial machinery.

🔥 Complete Model & Dimension Table (mm)

Bearing Number	Dimensions (d×D×B)	Bearing Number	Dimensions (d×D×B)
3300A	10×35×19	3301A	12×37×19
3302A	15×42×19	3302ATN	15×42×19
3303	17×47×22.2	3303A	17×47×22.2
3303ATN	17×47×22.2	3304	20×52×22.2
3304A	20×52×22.2	3304ATN	20×52×22.2
3305	25×62×25.4	3305A	25×62×25.4
3305ATN	25×62×25.4	3306	30×72×30.2
3306A	30×72×30.2	3306ATN	30×72×30.2
3307	35×80×34.9	3307A	35×80×34.9
3307ATN	35×80×34.9	3308	40×90×36.5
3308A	40×90×36.5	3308ATN	40×90×36.5
3309	45×100×39.7	3309A	45×100×39.7
3309ATN	45×100×39.7	3310	50×110×44.4
3310A	50×110×44.4	3310ATN	50×110×44.4
3310TA	50×110×44.4/47.6×3	3311	55×120×49.2
3311ATN	55×120×49.2	3312	60×130×54
3312A	60×130×54	3312ATN	60×130×54
3313A	65×140×58.7	3313ATN	65×140×58.7
3314ATN	70×150×63.5	3314M	70×150×63.5
3315ATN	75×160×68.3	3315	75×160×68.3
3315M	75×160×68.3	3316	80×170×68.3
3316M	80×170×68.3	3316ATN	80×170×68.3
3317M	85×180×73	3317ATN	85×180×73
3318	90×190×73	3318AM	90×190×73
3318M	90×190×73	3318ATN	90×190×73
3319AM	95×200×77.8	3319M	95×200×77.8
3319ATN	95×200×77.8	3320M	100×215×82.6
3320ATN	100×215×82.6	3322M	110×240×92.1

✅ Key Features

Inch standard design (3300A series), perfect for international interchange
Medium-heavy duty performance, high load capacity & rigidity
Multi-cage options: ATN (nylon) for high speed, M (brass) for heavy load
Separable cone & cup structure for easy installation & internal clearance adjustment
Full model coverage (3300A-3322M) for diverse application needs
Precision machining for accurate axial positioning & low friction

🎯 Application Scenarios

Automotive & truck transmission systems, differential gears
Construction machinery: excavators, loaders, heavy gearboxes
Mining equipment & crushers, vibrating screens
Agricultural machinery: large tractors, harvesters
General industrial: reducers, pumps, compressors, heavy-duty motors

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