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30205 Taper roller bearing (Metric).jpg
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High Load Taper Roller Bearing 25*52*16.25 - China Factory Suppliers for Automotive, Mining, Wind Power

Structural Features of Tapered Roller Bearings

Our tapered roller bearings feature conical inner and outer raceways that perfectly align with tapered rollers positioned between them. The unique design ensures that all projection lines of the conical surfaces meet at a single intersection on the bearing axis, providing optimal load distribution and stability.

This separable bearing allows for easy installation, disassembly, and maintenance, as the inner ring, roller, and cage assembly can be effortlessly detached from the outer ring. As a leading bearings supplier and manufacturer in China, our factory utilizes advanced technology to produce high-quality bearings that meet industry standards.

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    Product Details

    Bearing Detail (30205 Metric)

    Item No. 30205 (Metric)
    Bearing Type Taper roller bearing (Metric)
    Seals Type Open, 2RS
    Material Chrome steel GCr15
    Precision Rating P0, P2, P4, P5, P6
    Clearance C0, C2, C3, C4, C5
    Dimensions (d*D*T) 25 * 52 * 16.25 mm
    Inner Ring Width (B) 15 mm
    Outer Ring Width (C) 13 mm
    Contact Angle 14.036°
    Basic Dynamic Load (Cr) 38.1 kN
    Basic Static Load (Cor) 33.5 kN
    Reference Speed 11,000 r/min
    Limiting Speed 13,000 r/min
    Brand & Service JITO or OEM Service Available
    Main Features
    Long-life performance with premium steel
    Low-noise operation with strict quality control
    High-load capacity via advanced design
    Cost-competitive with high value
    Custom OEM solutions provided
    Applications Automotive, rolling mills, mining, metallurgy, plastic processing machinery, etc.
    Packaging Options Pallet, wooden case, commercial export packaging, or customized packing.

    Application Areas

    Industrial Machinery: Widely applied in machinery handling combined radial and axial loads, including industrial gearboxes, electric motors, and speed reducers.
    Automotive Industry: Commonly utilized in automotive wheel hub assemblies, differentials, and transmission systems to sustain complex dynamic road forces.
    Agricultural Equipment: Key component in wheel axles and transmission systems for tractors and harvesters, engineered for heavy loads and severe environments.
    Other Heavy Industries: Standard application across mining equipment, construction machinery, and textile manufacturing lines.

    Installation & Maintenance Guidelines

    Clearance Adjustment: Single-row tapered roller bearings require precise manual clearance adjustment during assembly to ensure optimal load distribution and service life. Double-row and four-row variants typically come with factory-preset clearance.
    Mounting Alignment: Ensure high-precision fitting between the bearing, shaft, and housing. Avoid overtightening or loose fits, and verify proper roller orientation to accept directional thrust loads.
    Lubrication & Sealing: Selecting appropriate grease or oil based on operating temperature and speed is critical. Install reliable seals to retain lubrication and protect against external contaminants.

    Product Overview & Specifications

    1. Taper Roller Bearing Basics

    Tapered roller bearings feature conical raceways on both inner and outer rings with tapered rollers arranged between them. Single-row configurations accommodate radial loads and unidirectional axial thrust. Because radial loading generates an induced internal axial force, these bearings are generally mounted in opposed pairs to maintain equilibrium.

    2. Component Separation & Mounting

    The separable design allows the inner ring assembly (cone, rollers, cage) to be mounted independently from the outer ring (cup), streamlining assembly and maintenance procedures in heavy machinery.

    3. Common Bearing Suffix Definitions

    A: Internal design modification
    B: Increased contact angle
    X: Dimensions match ISO standards
    CD: Double outer ring with oil holes/grooves
    TD: Double inner ring with tapered bore

    Metric Tapered Roller Bearings Size Chart

    Bearing No. Boundary Dimensions (mm) Basic Load Ratings (N) Limiting Speed (r/min) Weight (kg)
    d D T B C r min r1 min r2 min Cr Cor Grease Oil
    30202 15 35 11.75 11 10 0.6 0.6 0.15 14000 13000 11000 15000 0.053
    30302 42 14.25 13 11 1.0 1.0 0.3 23000 20000 9900 13000 0.098
    30203 17 40 13.25 12 11 1.0 1.0 0.3 20000 20000 9900 13000 0.080
    32203 40 17.25 16 14 1.0 1.0 0.3 26000 22000 9900 13000 0.108
    30303 47 15.25 14 12 1.0 1.0 0.3 28000 26000 9000 12000 0.134
    32303 47 20.25 16 14 1.0 1.0 0.3 27000 28000 9900 13000 0.102
    32004 20 42 15.00 15 12 0.6 0.6 0.15 27000 24000 9500 13000 0.097
    30204 47 15.25 14 12 1.0 1.0 0.3 29000 28000 8800 12000 0.127
    32204 47 19.25 18 15 1.0 1.0 0.3 39000 36000 8800 12000 0.160
    30304 52 16.25 15 13 1.5 1.5 0.6 35000 34000 8000 11000 0.169
    32304 52 22.25 21 18 1.5 1.5 0.6 48000 46000 8000 11000 0.245
    320/22 22 44 15.00 15 12 0.6 0.6 0.15 33000 28000 9000 12000 0.108
    302/22 50 15.25 14 12 1.0 1.0 0.3 27000 26000 8100 11000 0.141
    322/22 50 19.25 18 15 1.0 1.0 0.3 41000 36000 8100 11000 0.172
    303/22 56 17.25 16 14 1.5 1.5 0.6 36000 34000 7700 10000 0.209
    323/22 56 22.25 21 18 1.5 1.5 0.6 45000 43000 7600 10000 0.263
    32005 25 47 15.00 15 12 0.6 0.6 0.15 33000 27000 7900 11000 0.114
    33005 47 17.00 17 14 0.6 0.6 0.15 38000 31000 8000 11000 0.131
    30205 52 16.25 15 13 1.0 1.0 0.3 34000 31000 7300 9800 0.154
    32205 52 19.25 18 16 1.0 1.0 0.3 42000 37000 7300 9800 0.154
    33205 52 22.00 22 18 1.0 1.0 0.3 47000 43000 7300 9800 0.217
    30305 62 18.25 17 15 1.5 1.5 0.6 48000 45000 6700 8900 0.272
    31305 62 18.25 17 13 1.5 1.5 0.6 38000 36000 7500 11000 0.260
    32305 62 25.25 24 20 1.5 1.5 0.6 61000 57000 6700 8900 0.381
    320/28 28 52 16.00 16 12 1.0 1.0 0.3 36000 33000 7500 10000 0.146
    302/28 58 17.25 16 14 1.0 1.0 0.3 35000 33000 7000 9000 0.204
    322/28 58 20.25 19 16 1.0 1.0 0.3 44000 40000 6900 9300 0.236
    303/28 68 19.75 18 16 1.5 1.5 0.6 46000 44000 6000 8000 0.333
    323/28 68 25.75 24 21 1.5 1.5 0.6 64000 60000 6000 8000 0.453
    32906 30 47 12.00 12 9 0.6 0.6 0.15 24000 17000 7500 10000 0.073
    32006 55 17.00 17 13 1.0 1.0 0.3 45000 36000 6900 9200 0.166
    33006 55 20.00 20 16 1.0 1.0 0.3 50000 46000 6700 9000 0.208
    30206 62 17.25 16 14 1.0 1.0 0.3 48000 43000 6300 8400 0.241
    32206 62 21.25 20 17 1.0 1.0 0.3 64000 54000 6300 8400 0.241
    33206 62 25.00 25 20 1.0 1.0 0.3 75000 64000 6300 8400 0.344
    30306 72 20.75 19 16 1.5 1.5 0.6 60000 58000 5700 7600 0.408
    31306 72 20.75 19 16 1.5 1.5 0.6 57000 47000 6700 9500 0.390
    32306 72 28.75 27 23 1.5 1.5 0.6 80000 72000 7000 10000 0.550
    320/32 32 58 17.00 17 13 1.0 1.0 0.3 45000 36000 6500 8500 0.191
    302/32 65 18.25 17 15 1.0 1.0 0.3 40000 38000 6200 8200 0.258
    322/32 65 22.25 21 18 1.0 1.0 0.3 50000 46000 6200 8200 0.330
    332/32 65 26.00 26 21 1.0 1.0 0.3 71000 62000 6200 8300 0.404
    303/32 75 21.75 20 18 1.5 1.5 0.6 58000 54000 5500 7000 0.445
    323/32 75 29.75 28 25 1.5 1.5 0.6 98000 86000 5500 7200 0.650
    32907 35 55 14.00 14 12 0.6 0.6 0.15 39000 27000 6300 8500 0.123
    32007 62 18.00 18 14 1.0 1.0 0.3 50000 41000 6100 8100 0.224
    33007 62 21.00 21 17 1.0 1.0 0.3 63000 51000 5600 8000 0.267
    30207 72 18.25 17 15 1.5 1.5 0.6 61000 55000 5500 7400 0.344
    32207 72 24.25 23 19 1.5 1.5 0.6 85000 70000 5500 7400 0.457
    33207 72 28.00 28 22 1.5 1.5 0.6 100000 85000 5500 7400 0.461
    30307 80 22.75 21 18 2.0 1.5 0.6 75000 71000 5000 6600 0.540
    31307 80 22.75 21 15 2.0 1.5 0.6 61000 56000 6000 8500 0.520
    32307 80 32.75 31 25 2.0 1.5 0.6 110000 94000 6000 8500 0.800
    32908 40 62 15.00 15 12 0.6 0.6 0.15 34000 47000 5600 7500 0.161
    32008 68 19.00 19 15 1.0 1.0 0.3 50000 65000 5300 7100 0.273
    33008 68 22.00 22 18 1.0 1.0 0.3 59000 82000 5300 7100 0.312
    33108 75 26.00 26 21 1.5 1.5 0.6 79000 103000 5200 6900 0.494
    30208 80 19.75 18 16 1.5 1.5 0.6 61000 67000 4900 6600 0.435
    32208 80 24.75 23 19 1.5 1.5 0.6 79000 93000 4900 6600 0.558
    33208 80 32.00 32 25 1.5 1.5 0.6 103000 132000 4900 6600 0.728
    30308 90 25.25 23 20 2.0 1.5 0.6 91000 102000 4400 5900 0.769
    31308 90 25.25 23 17 2.0 1.5 0.6 81000 95000 5600 7500 0.720
    32308 90 35.25 33 27 2.0 1.5 0.6 110000 140000 4200 5600 1.080

    For complete technical catalogue and specifications, please visit our official website at www.jito.cc.

    Our Engineering Advantages

    Tailored Solutions

    Detailed demand analysis followed by optimized bearing designs developed by seasoned engineers to match exact application conditions.

    Strict Quality Control (Q/C)

    Adhering strictly to ISO standards with dedicated inspection teams, precision testing tools, and rigorous monitoring across all production stages.

    Standardized Export Packaging

    Eco-friendly and robust packaging options. Custom branding, boxes, barcodes, and palletized crating available on demand.

    Flexible Logistics

    Cost-effective ocean shipping for heavy industrial bulk freight, alongside rapid air freight and courier support for urgent orders.

    12-Month Quality Warranty

    Guaranteed against material and manufacturing defects for 12 months from the date of shipment under standardized operating conditions.

    Frequently Asked Questions

    What are the exact boundary dimensions of a 30205 bearing?

    The standard metric dimensions for a 30205 tapered roller bearing are an inside diameter (bore) of 25 mm, an outside diameter of 52 mm, and an overall assembly width of 16.25 mm.

    Can a single-row tapered roller bearing accept bidirectional axial loads?

    No, a single-row tapered roller bearing is designed to handle radial loads and axial loads in one direction only. For bidirectional thrust support, they are commonly mounted in back-to-back or face-to-face pairs.

    Why is clearance adjustment critical during the installation of 30205 bearings?

    Proper clearance adjustment ensures balanced load distribution across the rollers, prevents overheating, reduces premature wear, and ensures maximum operating lifespan under operating thermal expansion.

    What industries commonly use 30200 and 30300 series bearings?

    These series are widely utilized in automotive differentials, wheel hubs, industrial gearboxes, reduction drives, agricultural tractors, mining conveyors, and metallurgy processing machinery.

    Do you support custom OEM bearing manufacturing and branding?

    Yes, we provide full OEM services including custom material specifications, precision tolerances (P0 to P4), specialized clearances, custom laser marking, and customized packaging.

    What does the bearing suffix 'B' represent in tapered roller bearings?

    The suffix 'B' designates a modified internal design with an increased contact angle, which enhances the bearing's axial load carrying capability relative to its radial rating.

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