China Suppliers Factory 32306 Taper Roller Bearing 30*72*28.75 for Automotive and Construction Machinery High Load
Bearing Detail Specifications
| Item No. | 32306 (Metric) |
| Bearing Type | Taper roller bearing (Metric) |
| Material | Chrome steel GCr15 |
| Precision Rating | P0, P2, P5, P6, P4 |
| Internal Clearance | C0, C2, C3, C4, C5 |
| Dimensions (d*D*T) | 30 * 72 * 27 mm |
| Inner Ring Width (B) | 19 mm |
| Outer Ring Width (C) | 14.5 mm |
| Contact Angle | 11.86° |
| Basic Dynamic Load (Cr) | 21,357 lbf |
| Basic Static Load (Cor) | 19,109 lbf |
| Reference Speed | 7,500 r/min |
| Limiting Speed | 10,000 r/min |
| Brand | JITO or OEM Service |
| Separable Structure | Yes (Inner ring with roller assembly & outer ring) |
| Key Performance Features |
• Long service life with premium high quality • Low noise operation through strict JITO manufacturing control • High load-carrying capacity supported by advanced engineering design • Cost-effective pricing with optimized value • Custom OEM manufacturing solutions to meet precise requirements |
| Applications | Automobiles, rolling mills, mining, metallurgy, plastic machinery, and related industrial heavy equipment. |
| Packaging Options | Pallet, wooden case, standard commercial packaging, or customized to customer requirements. |
32306 Taper Roller Bearing Structural Features
The inner and outer rings of the bearing can be separated, which is convenient for installation and disassembly, and is conducive to simplifying the design and maintenance of mechanical structures.
Mainly bears radial and axial combined loads dominated by radial loads. It can bear radial force and axial force in a single direction simultaneously. When bearing radial loads, an axial component force is generated, usually requiring an opposing bearing for proper balance.
The clearance size can be adjusted during installation. By adjusting the clearance, performance is optimized for different operating environments, improving running accuracy and operational lifespan.
Compared with angular contact ball bearings, load capacity is significantly higher because the tapered rollers and raceway maintain line contact instead of point contact, distributing heavier loads efficiently.
Due to structural contact characteristics, friction between rolling elements and raceway requires adequate lubrication, providing robust stability at calculated limiting speeds.
Industrial Applications
Commonly used in vehicle wheel hub assemblies—particularly for heavy-duty trucks and large buses—supporting heavy chassis weight (radial loads) and cornering/braking forces (axial loads).
Widely applied in machine tool spindle supports, speed reducers, input/output shafts, mining machinery, metallurgical equipment, and plastic processing machinery subject to combined force vectors.
Integrated into excavators, loaders, cranes, pivot joints, and powertrain transmission systems to withstand severe shock loads and demanding outdoor conditions.
Utilized across tractors, harvesters, and implement gearboxes to reliably accommodate heavy radial and axial stresses over varied rough terrain.
Related 30300 Series Tapered Roller Bearings Catalogue
| Bearing Numbers | Boundary Dimensions (mm) | Basic Load Ratings (N) | Limiting Speeds (r/min) | Weight (kg) (approx) |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | D | T | B | C | r | r1 | r2 | Dynamic (Cr) | Static (Cor) | Grease | Oil | ||
| 30202 | 15 | 35 | 11.75 | 11 | 10 | 0.6 | 0.6 | 0.15 | 14,000 | 13,000 | 11,000 | 15,000 | 0.053 |
| 30302 | 42 | 14.25 | 13 | 11 | 1.0 | 1.0 | 0.3 | 23,000 | 20,000 | 9,900 | 13,000 | 0.098 | |
| 30203 | 17 | 40 | 13.25 | 12 | 11 | 1.0 | 1.0 | 0.3 | 20,000 | 20,000 | 9,900 | 13,000 | 0.080 |
| 32203 | 40 | 17.25 | 16 | 14 | 1.0 | 1.0 | 0.3 | 26,000 | 22,000 | 9,900 | 13,000 | 0.108 | |
| 30303 | 47 | 15.25 | 14 | 12 | 1.0 | 1.0 | 0.3 | 28,000 | 26,000 | 9,000 | 12,000 | 0.134 | |
| 32303 | 47 | 20.25 | 16 | 14 | 1.0 | 1.0 | 0.3 | 27,000 | 28,000 | 9,900 | 13,000 | 0.102 | |
| 32004 | 20 | 42 | 15.00 | 15 | 12 | 0.6 | 0.6 | 0.15 | 27,000 | 24,000 | 9,500 | 13,000 | 0.097 |
| 30204 | 47 | 15.25 | 14 | 12 | 1.0 | 1.0 | 0.3 | 29,000 | 28,000 | 8,800 | 12,000 | 0.127 | |
| 32204 | 47 | 19.25 | 18 | 15 | 1.0 | 1.0 | 0.3 | 39,000 | 36,000 | 8,800 | 12,000 | 0.160 | |
| 30304 | 52 | 16.25 | 15 | 13 | 1.5 | 1.5 | 0.6 | 35,000 | 34,000 | 8,000 | 11,000 | 0.169 | |
| 32304 | 52 | 22.25 | 21 | 18 | 1.5 | 1.5 | 0.6 | 48,000 | 46,000 | 8,000 | 11,000 | 0.245 | |
| 32906 | 30 | 47 | 12.00 | 12 | 9 | 0.6 | 0.6 | 0.15 | 24,000 | 17,000 | 7,500 | 10,000 | 0.073 |
| 32006 | 55 | 17.00 | 17 | 13 | 1.0 | 1.0 | 0.3 | 45,000 | 36,000 | 6,900 | 9,200 | 0.166 | |
| 33006 | 55 | 20.00 | 20 | 16 | 1.0 | 1.0 | 0.3 | 50,000 | 46,000 | 6,700 | 9,000 | 0.208 | |
| 30206 | 62 | 17.25 | 16 | 14 | 1.0 | 1.0 | 0.3 | 48,000 | 43,000 | 6,300 | 8,400 | 0.241 | |
| 32206 | 62 | 21.25 | 20 | 17 | 1.0 | 1.0 | 0.3 | 64,000 | 54,000 | 6,300 | 8,400 | 0.241 | |
| 33206 | 62 | 25.00 | 25 | 20 | 1.0 | 1.0 | 0.3 | 75,000 | 64,000 | 6,300 | 8,400 | 0.344 | |
| 30306 | 72 | 20.75 | 19 | 16 | 1.5 | 1.5 | 0.6 | 60,000 | 58,000 | 5,700 | 7,600 | 0.408 | |
| 31306 | 72 | 20.75 | 19 | 16 | 1.5 | 1.5 | 0.6 | 57,000 | 47,000 | 6,700 | 9,500 | 0.390 | |
| 32306 | 72 | 28.75 | 27 | 23 | 1.5 | 1.5 | 0.6 | 80,000 | 72,000 | 7,000 | 10,000 | 0.550 | |
For full catalogue parameters or customized models, please visit our official website: www.jito.cc
Our Advantages & Service System
We communicate closely with customers to analyze exact load conditions, then our engineering team formulates an optimum technical solution.
In accordance with ISO standards, professional staff and precision testing instruments inspect every stage from raw material to final shipment.
Standardized export packing with eco-friendly materials. Customized color boxes, industrial palletizing, and barcode labels are available.
Cost-efficient ocean shipping for bulk cargo, alongside expedited air freight and global express services for urgent supply demands.
We guarantee our bearings to be free from defects in material and workmanship for a 12-month period from the original shipping date.
Frequently Asked Questions (FAQ)
The 32306 metric tapered roller bearing has a 30 mm inner bore (d), 72 mm outer diameter (D), and an overall assembled width of 28.75 mm (T), with a basic dynamic load rating of 21,357 lbf.
Yes, the 32306 bearing is engineered with a tapered cup and cone structure specifically designed to support heavy combined radial and unidirectional axial loads efficiently.
Because the cone assembly (inner ring with rollers) and cup (outer ring) are separable, internal clearance or pre-load can be adjusted against an opposing bearing during mechanical assembly using shims or locknuts.
All our high-performance tapered roller bearings are manufactured using premium high-carbon chrome bearing steel (GCr15/100Cr6) to ensure superior fatigue resistance and long operating life.
We offer comprehensive OEM services, including custom precision classes (P0 to P4), specialized internal clearances (C2 to C5), custom laser marking, and client-specified branded packaging.
We offer a 12-month quality warranty against defects in material and manufacturing workmanship from the shipping date under standard installation and recommended operating conditions.