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KOYO Needle Roller Bearing: B, 308, 1 7/8 in Bore, 2 1/4 in OD, Full Complement - Drawn-Cup Needle Roller Bearings
KOYODrawn-Cup Needle Roller Bearings

KOYO Needle Roller Bearing: B, 308, 1 7/8 in Bore, 2 1/4 in OD, Full Complement

The KOYO B-308 is a drawn-cup needle roller bearing, part of KOYO's B series. This single-row, full-complement bearing is made of alloy steel and has an open design. It features a 1 7/8 inch bore and a 2 1/4 inch…

SKU 3G-OTH-107344

Also listed as: B308 · B 308

Brand
KOYO
Item
Needle Roller Bearing: B, 308, 1 7/8 in Bore, 2 1/4 in OD, Full Complement
Category
Drawn-Cup Needle Roller Bearings
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

KOYO
Manufacturer Part Number
B-308
Type
308, Full Complement, Open, Alloy Steel
Bore
1 7/8 in
OD
2 1/4 in
Bearing Design
B
Number of Rows
One
Full Complement
Yes
System of Measurement
Inch
Bearing Industry Number
308

Technical Documents

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KOYO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The KOYO B-308 is a drawn-cup needle roller bearing, part of KOYO's B series. This single-row, full-complement bearing is made of alloy steel and has an open design. It features a 1 7/8 inch bore and a 2 1/4 inch outer diameter, with the manufacturer part number B-308 and bearing industry number 308.

Frequently Asked Questions

What is the KOYO B-308 needle roller bearing used for?

The KOYO B-308 drawn-cup needle roller bearing is used in industrial machinery and automotive applications where radial space is limited. Its full-complement design provides high load capacity in a compact envelope, making it suitable for gearboxes, pumps, and conveyor systems.

What are the specifications of the KOYO B-308 bearing?

The KOYO B-308 is a single-row, full-complement drawn-cup needle roller bearing with a 1 7/8 in bore and 2 1/4 in outer diameter. It is made of alloy steel, has an open design, and uses inch measurements. The manufacturer part number is B-308 and the bearing industry number is 308.

Where to buy the KOYO B-308 bearing worldwide?

You can source the KOYO B-308 bearing through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine KOYO components to procurement teams and plant engineers globally.

How to select the correct KOYO needle roller bearing for an application?

To select the correct KOYO needle roller bearing, match the bore and outer diameter to your shaft and housing dimensions. For the B-308, ensure a 1 7/8 in shaft and 2 1/4 in housing bore. Verify load ratings and confirm full-complement design suits your speed and lubrication requirements. Consult KOYO's catalog for fit and tolerance details.

Used in

Common applications for KOYO
Automotive transmissions — KOYO drawn-cup needle roller bearings (B-44) for gear support in compact gearbox assemblies.
Conveyor systems — KOYO heavy-duty needle roller bearings (HJ-202820) for radial load handling in roller conveyors.
Printing machinery — KOYO needle roller thrust bearings (NTA-3648) for axial positioning of rotating cylinders.
Industrial pumps — KOYO thrust bearing washers (TRD-3648) for axial load distribution in pump shafts.
Indexing tables — KOYO single-direction clutch and bearing assemblies (FCB-20) for precise indexing and overrunning control.
Material handling equipment — KOYO drawn-cup needle roller bearings (BH-2020) for compact wheel or roller supports.

KOYO Products

3G Electric supplies KOYO drawn-cup needle roller bearings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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