Bore (d): 3 inch/ 76.20mm
Outer Dimater (D): 4.7812 inch/ 121.442mm
Inner Ring Width (B): 0.9060 inch/ 23.012mm
Bearing Width (T): 0.9688 inch/ 24.608mm
Mass: 0.95kg/ 2.094lb
Cage: stamped steel
Bearing Material: chrome steel
Lubrication: grease or oil
34300/34478 Bearing Bore (d): 3 inch/ 76.20mm
Outer Dimater (D): 4.7812 inch/ 121.442mm
Inner Ring Width (B): 0.9060 inch/ 23.012mm
Bearing Width (T): 0.9688 inch/ 24.608mm
Mass: 0.95kg/ 2.094lb
Beearing Cage: stamped steel
Bearing Material: chrome steel
Cone Number: 34300
Cup Number: 34478
Seal Type: open
Precision: ABEC1, P0
Lubrication: grease or oil
Equivalents: 34300 / 34478, 34300-34478, 34300/478, 34300-99401
Tapered Roller Design: The 34300/34478 bearing features a tapered roller design, allowing for efficient load distribution and handling both radial and axial loads.
High Load Capacity: This bearing is specifically designed to support high loads, making it suitable for various heavy-duty applications.
Durability: Constructed with high-quality chrome steel materials, this bearing ensures longevity and reliability under demanding conditions.
Versatile Applications: Commonly used in automotive, industrial machinery, and agricultural equipment, making it suitable for a wide range of environments.
Ease of Maintenance: Designed for easy installation and maintenance, this bearing minimizes downtime and reduces maintenance costs.
Temperature Resistance: Capable of withstanding varying temperatures, enhancing its performance in diverse working environments.
Comparison helps when dimensional fit is only part of the decision and load direction, sealing, clearance, speed, temperature, or repeat-order stability still need to be confirmed. Reviewing one or two nearby options early usually reduces sourcing mistakes later.
Buyers normally confirm the part reference, main dimensions, application, speed range, operating environment, sealing needs, and any packaging or marking requirements. That gives the supplier a cleaner basis for confirming availability and suitable alternatives.
A quick review of Taper Roller Bearings, one more commercial destination, and one practical guide usually saves time. That combination helps separate simple replacement orders from jobs that still need fit or application review.
Because it makes later decisions faster. When sizing notes, application cues, and nearby options stay close to the product, engineering, purchasing, and maintenance teams can revisit the same logic without starting the review from zero.
1. Sea shipping for mass cargos (GW > 500KGS)
2. Air shipping (GW between 100KGS – 500 KGS)
3. Express, such as DHL, TNT, Fedex, UPS for small cargos ( GW < 100KGS)
4. If you have shipping agent in China, we can send goods to your shipping agent's warehouse
We accept T/T, W/U, PAYPAL, L/C etc
Buyer FAQ
Confirm the bearing number, bore size, outside diameter, width, seal or shield type, cage material, clearance, precision level, quantity, and application. These details help prevent a size match from becoming a performance mismatch.
Yes. Replacement and repeat orders are easier when the original marking, measured dimensions, photos, application, and quantity are available. If the marking is unclear, the team can start from the size and working condition.
This item is handled within the Taper Roller Bearings family. Comparing the family page can help buyers review similar sizes, seal options, load direction, and related bearing choices before requesting a quote.
Price and lead time can change with quantity, stock availability, precision grade, clearance, material, cage, seal or shield type, lubrication, packaging, and whether the order needs standard matching or custom production.
Inspection can include material review, dimensional measurement, noise and vibration checks, surface and crack checks, visual review, and packaging inspection according to the confirmed order requirements.
Need help checking fit, price, or lead time? Request a bearing quote
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