JR40x45x40 Inner Rings KOYO / NTN Interchange

JR40x45x40 Inner Rings 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 is a selection of typical models from our production:

JR5x8x8JS1, JR90x100x26, IR-283624, JR17x22x16, IR-121616, JR15x20x26, JR50x55x35, JR110x120x30, IR-101416, JR8x12x12,5, IR-1816, IR-314024, JR6x10x10, JR9x12x12, IR-101416, IR-253220, IR-324024, IR-445228, JR25x30x38,5, IR-314028, JRZ25x30x18JS1, JR5x8x16, IR-1616, IR-404828, JRZ50x58x23JS1, JR40x50x20, JR17x21x16, JR17x21x20, JRZ10x14x14JS1, JR75x85x35, JR75x85x30, JR45x55x40, IR-128, JR50x55x25, JR70x80x30, JR45x52x22, IR-404824, IR-283628, JR40x45x30, JR10x14x12, JR25x29x30, JR42x47x30, IR-192420, JR65x72x45, JR20x25x17, IR-232816, JR50x58x22, JR17x20x30,5, JR40x45x20,5, IR-68-1, IR-121612, JR17x22x26, IR-1224, JR22x26x20, JR15x20x13, IR-1316, JR90x105x63, JRZ45x52x23JS1, JRZ15x20x14JS1, IR-2824

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