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KOYO Inner Ring: 3/4 in Bore, 1 in OD, 0.515 in Overall Wd, Alloy Steel - Needle Roller Bearing Inner Rings
KOYONeedle Roller Bearing Inner Rings

KOYO Inner Ring: 3/4 in Bore, 1 in OD, 0.515 in Overall Wd, Alloy Steel

The KOYO IR-128 is an inch-system needle roller bearing inner ring with a 3/4 in bore, 1 in OD, and 0.515 in overall width, made from alloy steel. This component is designed for use with needle roller bearings to…

SKU 3G-OTH-101760

Brand
KOYO
Item
Inner Ring: 3/4 in Bore, 1 in OD, 0.515 in Overall Wd, Alloy Steel
Category
Needle Roller Bearing Inner Rings
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Technical Specifications

KOYO
Manufacturer Part Number
IR-128
System of Measurement
Inch
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KOYO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The KOYO IR-128 is an inch-system needle roller bearing inner ring with a 3/4 in bore, 1 in OD, and 0.515 in overall width, made from alloy steel. This component is designed for use with needle roller bearings to provide a hardened raceway for the rolling elements.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the KOYO IR-128 inner ring used for?

The KOYO IR-128 is a needle roller bearing inner ring that provides a hardened raceway for needle rollers in inch-system bearing assemblies. It is commonly used in industrial machinery, automotive transmissions, and gearboxes where compact radial load support is required.

What are the specifications of the KOYO IR-128?

The KOYO IR-128 has a 3/4 in bore, 1 in OD, and 0.515 in overall width. It is made from alloy steel and uses an inch system of measurement. The manufacturer part number is IR-128. This inner ring is designed to pair with needle roller bearings for reliable operation.

Where to buy the KOYO IR-128 worldwide?

3G Electric supplies the KOYO IR-128 needle roller bearing inner ring worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this component.

How to select the correct KOYO inner ring for a needle roller bearing?

To select the correct KOYO inner ring, match the bore, OD, and overall width to your bearing assembly's requirements. The IR-128 uses inch dimensions: 3/4 in bore, 1 in OD, and 0.515 in width. Ensure the inner ring is made from hardened alloy steel to provide a proper raceway for the needle rollers.

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 needle roller bearing inner rings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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