Heavy Duty 30306 Cone and Cup Gearbox Bearing Wholesale Supplier
| Item No : | 30306 (7306E / ISO 303 Heavy Series) |
| Size (d*D*B) : | 30x72x20.75mm |
| Material : | |
| Lead Time : | 3-5 days |
| Weight : | 0.445KG |
| MOQ : | 10 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
The 30306 (30x72x20.75mm) is an ISO metric single-row tapered roller bearing belonging to the heavy-duty 303 series. Featuring a reinforced outer dimension (72mm OD) and steeper contact geometry compared to lighter series, it is engineered to sustain intense combined radial loads and heavy unidirectional axial thrust. As a premier B2B trading partner, we supply high-performance 30306 bearings under our cost-effective RMO brand for machinery manufacturers and repair specialists globally. If your project demands alternative Tier-1 international brands, our established Global Sourcing Network ensures efficient procurement.
⚙️Product Features:
- Heavy 303 Series Load Profile: Built with a thicker outer wall section and enlarged roller profile to handle heavy shock loads and high torque transmission without structural fatigue.
- Superior Axial Thrust Stiffness: The optimized taper contact angle delivers extreme rigidity under heavy thrust forces, making it ideal for bevel gear drives and pinion shafts.
- Precision Separable Structure: The outer cup and inner cone-roller assembly dismount independently, allowing simplified axial clearance preloading and efficient lubrication maintenance.
- Agile B2B Supply Network: Boost your distribution margins with our large-volume RMO brand inventory, or partner with us to source original OEM-grade international bearing brands.
⚙️Product Application:
Engineered for extreme dynamic stability under high shock and thrust loads, the 30306 tapered bearing is widely deployed in:
- Bevel gear drives, heavy-duty industrial reduction gearboxes, and speed changers.
- Agricultural machinery, rotary tiller drivelines, tractor PTO drives, and harvesting equipment.
- Automotive differential pinion shafts, commercial truck axle hubs, and transfer cases.
- Mining crushers, construction machinery wheel drives, and heavy conveyor head pulleys.
⚙️Precautions:
| 1. Keep clean | 2. Use with caution | 3. appropriate tool | 4. Hot-loading | 5. Be careful of rust |
| Dust will have a bad effect on the bearing, so keep the surrounding clean. | Strong impact during use can easily cause scratches and indentations. | Avoid replacing existing tools, and use appropriate tools. | Bearings are precision parts, so hot installation is recommended. | Sweat on your hands during operation will cause rust, so it is best to wear gloves. |
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⚙️Obtain Certificate:
About Rimao
Since its establishment in 2011, Rimao Bearing has combined international vision with local wisdom and injected innovative ideas into every bearing and pulley with its profound industry accumulation and unremitting pursuit of technology. We have not only passed CE and ROHS certification, but also set a new benchmark in the industry and led the development trend of the bearing industry.
We are not just a ball bearing and roller bearing importer and wholesaler. We provide real solutions to help you achieve the product and design goals set by your customers. With more than 20 years of production and sales experience, tens of thousands of models and specifications, we look forward to cooperating with you!
⚙️Technical Parameters:
| Model / Industry No. | 30306 (7306E / ISO 303 Heavy Series) |
| Bearing Type | |
| Metric Dimensions | 30x72x20.75mm (Inner d x Outer D x Total Width/Height H) |
| Ring Widths | Inner Cone Width: 19 mm / Outer Cup Width: 16 mm |
| Structure | Separable Cup and Cone Assembly |
| Material | |
| Precision Rating | Normal / P6 / P5 Precision Grade |
| Brand | RMO/Neutral/OEM/Other Brands |
| Package | Individual plastic bag, plastic tube or original RMO brand box |
| Lead Time | 3-5 days for stock; 7-15 days for bulk orders |
| Shipping | Express (DHL/FedEx/UPS), Air Freight, Sea Freight |
| Payment | 100% T/T, or 30% T/T In Advance, 70% T/T After Finished Production |
| Model No. | d | D | H | m |
| 30302 | 15 mm | 42 mm | 14.25 mm | 0.1 KG |
| 30303 | 17 mm | 47 mm | 15.25 mm | 0.13 KG |
| 30304 | 20 mm | 52 mm | 16.25 mm | 0.19 KG |
| 30305 | 25 mm | 62 mm | 18.25 mm | 0.27 KG |
| 30306 | 30 mm | 72 mm | 20.75 mm | 0.45 KG |
| 30307 | 35 mm | 80 mm | 22.75 mm | 0.57 KG |
| 30308 | 40 mm | 90 mm | 25.25 mm | 0.81 KG |
| 30309 | 45 mm | 100 mm | 27.25 mm | 1 KG |
| 30310 | 50 mm | 110 mm | 29.25 mm | 1.38 KG |
| 30311 | 55 mm | 120 mm | 31.5 mm | 1.8 KG |
| 30312 | 60 mm | 130 mm | 33.5 mm | 2.02 KG |
| 30313 | 65 mm | 140 mm | 36 mm | 2.4 KG |
| 30314 | 70 mm | 150 mm | 38 mm | 3.02 KG |
| 30315 | 75 mm | 160 mm | 40 mm | 3.64 KG |
| 30316 | 80 mm | 170 mm | 42.5 mm | 4.34 KG |
| 30317 | 85 mm | 180 mm | 44.5 mm | 4.83 KG |
| 30318 | 90 mm | 190 mm | 46.5 mm | 5.83 KG |
| 30319 | 95 mm | 200 mm | 49.5 mm | 6.77 KG |
| 30320 | 100 mm | 215 mm | 51.5 mm | 8.3 KG |
| 30321 | 105 mm | 225 mm | 53.5 mm | 9.54 KG |
| 30322 | 110 mm | 240 mm | 54.5 mm | 11 KG |
| 30324 | 120 mm | 260 mm | 59.5 mm | 14.3 KG |
| 30326 | 130 mm | 280 mm | 63.75 mm | 17.1 KG |
| 30328 | 140 mm | 300 mm | 67.75 mm | 20.4 KG |
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