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KOYO

KOYO is a Japanese manufacturer of needle roller bearings and related components, with a product line that includes drawn-cup needle roller bearings, heavy-duty needle roller bearings, needle roller thrust bearings, thrust bearing washers, and single-direction needle roller clutch and bearing assemblies. The brand is recognized in industrial applications for its focus on compact, high-load-capacity rolling elements designed for constrained spaces where radial or axial loads must be managed. KOYO’s catalog covers both inch and metric systems, with bore diameters ranging from 1/4 in (6.35 mm) to 2 1/4 in (57.15 mm) and outside diameters up to 3 in (76.2 mm) in the sample range. Products are constructed from alloy steel, with open configurations and options for full complement or caged roller sets. The drawn-cup series (B, BH designs) provides thin-section, unitized housings for radial loads, while the heavy-duty HJ series offers increased cross-section for higher load ratings. Needle roller thrust bearings (NTA series) and their companion washers (TRB, TRD series) handle axial loads in compact assemblies, with maximum speeds up to 5,600 RPM as specified for certain models. The FCB series integrates a one-way clutch with a needle roller bearing in a single unit, suitable for overrunning or indexing applications. 3G Electric supplies KOYO bearings and clutches globally, supporting procurement for plant maintenance, equipment rebuilds, and OEM replacement. The product range is applicable to gearboxes, automotive transmissions, conveyor systems, printing machinery, and industrial pumps where needle roller bearings are specified for their high load density and space efficiency. No specific certifications or awards are claimed for KOYO beyond the technical specifications inherent in the products listed.

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About KOYO

KOYO is a Japanese manufacturer of needle roller bearings and related components, with a product line that includes drawn-cup needle roller bearings, heavy-duty needle roller bearings, needle roller thrust bearings, thrust bearing washers, and single-direction needle roller clutch and bearing assemblies. The brand is recognized in industrial applications for its focus on compact, high-load-capacity rolling elements designed for constrained spaces where radial or axial loads must be managed. KOYO’s catalog covers both inch and metric systems, with bore diameters ranging from 1/4 in (6.35 mm) to 2 1/4 in (57.15 mm) and outside diameters up to 3 in (76.2 mm) in the sample range. Products are constructed from alloy steel, with open configurations and options for full complement or caged roller sets. The drawn-cup series (B, BH designs) provides thin-section, unitized housings for radial loads, while the heavy-duty HJ series offers increased cross-section for higher load ratings. Needle roller thrust bearings (NTA series) and their companion washers (TRB, TRD series) handle axial loads in compact assemblies, with maximum speeds up to 5,600 RPM as specified for certain models. The FCB series integrates a one-way clutch with a needle roller bearing in a single unit, suitable for overrunning or indexing applications. 3G Electric supplies KOYO bearings and clutches globally, supporting procurement for plant maintenance, equipment rebuilds, and OEM replacement. The product range is applicable to gearboxes, automotive transmissions, conveyor systems, printing machinery, and industrial pumps where needle roller bearings are specified for their high load density and space efficiency. No specific certifications or awards are claimed for KOYO beyond the technical specifications inherent in the products listed.

Common Applications

  • 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.

Frequently asked questions

Common questions about KOYO from 3G Electric.

What types of KOYO needle roller bearings are available through 3G Electric?

3G Electric stocks KOYO drawn-cup needle roller bearings (B and BH series), heavy-duty needle roller bearings (HJ series), needle roller thrust bearings (NTA series), thrust bearing washers (TRB and TRD series), and single-direction needle roller clutch and bearing assemblies (FCB series). These cover inch and metric bore sizes, full complement and caged designs, and open configurations for radial and axial load applications.

What is the difference between KOYO drawn-cup and heavy-duty needle roller bearings?

KOYO drawn-cup needle roller bearings (B, BH series) use a thin, hardened steel outer ring formed from strip steel, providing a compact, lightweight design for radial loads in limited spaces. Heavy-duty needle roller bearings (HJ series) have a thicker outer ring and larger roller complement, offering higher load capacity and rigidity for applications with greater radial forces or shock loads.

How do I select the correct KOYO thrust bearing washer for a given bearing?

KOYO thrust bearing washers (TRB, TRD series) are matched to specific NTA needle roller thrust bearings by bore diameter and outside diameter. For example, the TRB-1018 washer is compatible with bearing 1018, and the TRD-3648 washer with bearing 3648. Verify the bearing industry number or dimensions (bore, OD, thickness) against the washer specifications to ensure proper fit and axial load distribution.

What is the maximum operating speed for KOYO needle roller thrust bearings?

The maximum speed for KOYO needle roller thrust bearings varies by model. For instance, the NTA-3648 bearing has a maximum speed of 5,600 RPM. Speed ratings depend on bearing size, lubrication, and load conditions. Always consult the specific product data sheet for the exact RPM limit of the bearing in your application.

Are KOYO FCB series bearings suitable for overrunning clutch applications?

Yes, the KOYO FCB series combines a needle roller bearing with a one-way clutch in a single assembly, designed for overrunning, indexing, and backstopping applications. The FCB-20, for example, has a 20 mm bore and three rows of rollers, providing both radial support and unidirectional torque transmission in compact spaces.

Does 3G Electric supply KOYO products?

Yes — 3G Electric (S) Pte. Ltd. supplies KOYO products. We stock the KOYO catalog and supply genuine factory-original products with full manufacturer warranty and technical support.