JR17x21x20 Needle Roller Bearing Inner Ring KOYO / NTN Interchange

JR17x21x20 Needle Roller Bearing Inner Ring is a precision-machined, hardened, and ground component that serve as the inner raceway for needle roller and cage assemblies (K series) or drawn cup needle roller bearings (HK/BK series). They are used when the shaft itself cannot be hardened and ground to the required specifications for direct raceway use.

We can supply both standard K series models and interchangeable replacements compatible with INA, SKF, and IKO.

Below are examples of models we regularly produce and export:

IR-212620, IR-314024, IR-192420, JR85x100x35, JR7x10x12, JR30x35x17, JR22x28x30, JR90x105x32, IR-475632, JR25x30x30, JR38x43x20, JR170x185x45, JR50x55x25, JR55x60x25, JR90x105x35, IRA-10, JR50x58x40, JR45x52x22, JR5x8x8JS1, JRZ10x14x14JS1, JR85x95x26, JR25x30x26, JR30x35x32, JR10x13x12,5, JR40x48x22, JR5x8x12, IR-404828, JR15x20x16, JR50x60x20, IR-485632, JR55x60x35, IR-242820, JR65x75x30, IR-253220, IR-445228, IR-121612, IR-1516, JR28x32x17, IR-445232, JR90x100x26, IR-253020, JR15x19x16, JRZ6x10x12JS1, JR25x30x20, IR-162020, IR-222820, JR45x55x40, IR-1416, IR-101416, JR70x80x30, IR-283624, JR40x45x17, JR12x15x12,5, JR80x90x30, JRZ12x16x14JS1, JR65x75x60, JR110x125x40, JR40x45x30, JR65x73x25, JRZ40x48x23JS1

Application

Heavy-duty industrial machinery

Construction equipment

Mining machinery

Steel mill equipment

Gearboxes and transmissions

Machine tool spindles

Material handling systems

Packaging

• Industrial packaging
• Neutral packaging
• Customized brand packaging available
• Single box+standard export carton packing+wooden pallet packing for export shipment

Stock & Delivery

We maintain sufficient inventory for common bearing models.

Small trial orders are welcome. Fast shipment is available for urgent orders.

Send Inquiry

We offer OEM manufacturing for non-standard bore sizes, widths, and materials. Please provide your drawing or specifications, and we will respond with a quotation within 24 hours.

Email: sales@needlebearingcn.com