Sep 19, 2026 · Installation & Maintenance
Remove Ball Bearings from Motor Shafts: Wholesale Supplier
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Read the selection guideSKF bearings by designation · Itemized written quotes for mixed project lists




State the exact execution (designation suffix), whether you need the complete assembly, and which housings or mounting accessories belong on the same line. Keep precision items separate, with accuracy class and arrangement.
Technical data
Listed data for this SKF designation; confirm the execution and dimensions against your drawing or application before ordering.
| Category | Cylindrical Roller Bearing |
|---|
| Parameter | Details |
|---|---|
| Model Number | N309EM |
| Product Name | Cylindrical Roller Bearing |
| Bore Diameter (d) | 45mm |
| Outside Diameter (D) | 100mm |
| Width (B) | 25mm |
| Material | Bearing Steel |
| Structure | Cylindrical |
| Load Direction | Radial Bearing |
| Separated | Separated |
| Seals Type | Open |
| Lubrication Type | Oil Grease Dry |
| Precision Rating | P0, P6, P5, P4, P2 |
| Number of Row | Single Row |
| Spherical | Non-Aligning Bearings |
| Weight | 0.990kg |
| Package Size | 12.00cm × 12.00cm × 4.50cm |
| Transport Package | Carton Pallet |
| Industry | Typical Applications |
|---|---|
| Industrial Machinery | Rotary shafts, gearboxes, conveyor systems |
| Steel Mills | Rolling mill equipment, drive systems |
| Construction Machinery | Hydraulic pumps, crane components |
| Mining Equipment | Drill rigs, conveyor rollers |
Finding the right bearing for industrial machinery can be challenging—especially when dealing with critical applications where dimensional accuracy and material quality directly impact uptime. Many procurement teams face issues like mismatched sizes leading to installation delays or premature wear from substandard bearings. With the SKF N309EM cylindrical roller bearing, these concerns are addressed through precision engineering and authentic manufacturing standards.
The SKF N309EM cylindrical roller bearing is designed to handle radial loads in high-stress industrial environments. As part of our comprehensive bearing portfolio, it meets the demands of machinery in steel mills, construction equipment, and mining operations. With a 45x100x25mm dimension, this bearing fits standard industrial shafts, ensuring compatibility with existing equipment. Our direct sourcing from global distribution centers means we maintain large inventory, supporting same-day shipping for urgent replacements.
This cylindrical roller bearing excels in applications with high radial loads and moderate speeds, such as gearbox input shafts and conveyor drive systems. The separated inner and outer rings allow for easy mounting and dismounting, simplifying maintenance. Its open design accommodates various lubrication methods—oil, grease, or dry operation—making it versatile for different operating conditions. The non-aligning structure requires precise shaft alignment but delivers consistent performance under steady radial loads.
The SKF N309EM’s performance stems from critical design elements: Bearing steel construction provides high surface hardness and wear resistance, essential for withstanding continuous industrial use. Precision ratings from P0 to P2 ensure tight dimensional tolerances, reducing vibration and noise in high-speed applications. The single-row configuration balances load capacity with compact size, making it suitable for machinery with space constraints. Separated rings facilitate easy inspection and re-lubrication, extending service life in hard-to-maintain equipment.
Selecting a quality cylindrical roller bearing like the SKF N309EM minimizes long-term expenses. Inferior bearings often fail early due to material fatigue, causing unplanned downtime and costly repairs. This bearing’s robust construction and strict quality control reduce the risk of premature failure. Its compatibility with international standards ensures interchangeability, eliminating the need for custom machining when replacing worn components. By investing in a reliable bearing, you avoid hidden costs associated with frequent replacements and production interruptions.
Our bearings undergo rigorous quality checks, adhering to ISO 9001 standards from raw material inspection to final dimensional testing. Each SKF N309EM bearing comes with complete traceability documentation, including batch inspection reports. We offer a factory warranty covering manufacturing defects, ensuring peace of mind for your procurement team. With access to over 95% of conventional SKF models in stock, we provide consistent supply for both scheduled maintenance and emergency replacements.
Whether you need a single SKF N309EM bearing or bulk quantities, our team can provide competitive pricing and lead times. Share your machinery requirements, including operating conditions and quantity, and we’ll help confirm compatibility. With our global delivery network, your order will arrive within 7-15 days to most regions. Don’t delay critical maintenance—contact us now to secure your bearings.
Q: Do you supply other bearing brands and models besides SKF?
A: Yes, we offer a full range of international brands including NSK, NTN, Koyo, NACHI, IKO, FAG, Timken, and domestic Chinese brands. We can source specific models based on your requirements.
Q: How can I confirm if the SKF N309EM fits my equipment?
A: Provide your equipment model or existing bearing dimensions (inner diameter, outer diameter, width), and our technical team will verify compatibility with the SKF N309EM specifications.
Q: What is your warranty policy for bearings?
A: We provide a factory warranty covering manufacturing defects. The warranty period and terms are specified in each order contract, with support for returns or replacements if issues arise.
Q: What is the minimum order quantity for this bearing?
A: We support low minimum order quantities, including single-unit purchases, to accommodate both small maintenance needs and large production runs.
Q: How long does shipping take to my location?
A: Standard delivery takes 7-15 days to most countries and regions. Express shipping options are available for urgent orders, with shorter lead times.
Q: Do you offer OEM or custom bearing solutions?
A: Yes, we provide OEM and ODM services, including custom packaging, labeling, and technical documentation tailored to your specific requirements.
Ready to order or need a quote?
Send the bearing model, dimensions (d x D x B), and quantity — we'll get back to you with pricing and lead time.
Project buyers
"We submitted a long SKF list for a new project, mixing ball, roller, needle and thrust bearings. This supplier came back with itemized pricing, lead times and alternatives for two long-lead references. We could plan the procurement timeline without surprises."
Daniel KimKim Engineering Project · South Korea"When our project timeline shifted and we needed to split the delivery into three batches, the supplier worked with us on the schedule. Each batch arrived complete and on the agreed date. No holding costs, no rush shipping fees."
Mohammed Al-AminAl-Amin Contracting · Saudi ArabiaSame series
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Typical equipment and duty conditions this SKF bearing type is specified for.
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Read the selection guideFAQ
Send the selected SKF model, quantity per line, accuracy requirement, mounting accessories, destination country and postcode, and the date you need the goods. Confirm the exact execution and whether you need the complete assembly. With that, Project Purchasing Company returns a written itemized quote.
List precision bearings on separate lines with their accuracy class and arrangement or configuration. Keeping them apart from standard bearings prevents wrong pricing and wrong shipments on mixed project lists.
Yes. Send a photo of the nameplate or bearing markings, and we list the information that still needs confirming. Any technical change or alternative model is clearly marked and requires your approval.
Yes. Shipping method and delivery schedule are confirmed before dispatch, so batches can follow your installation timeline. On receipt, check labels, quantity and condition; any mismatch is handled with your order number and photos.
Request a quote
Project Purchasing Company quotes every line by SKF model, with price and currency, stock, estimated lead time, validity and freight or tax terms. Add related bearings and accessories to the same request.