1PCS Bearings NKTB5911 Needle Roller Angular Contact Ball Combination Bearing Needle Bearing Size 55mm*80mm*34mm

Combination needle roller bearing is a bearing unit composed of radial needle roller bearing and thrust bearing or angular contact ball bearing components. It has a compact structure, small volume, high rotational accuracy, and can withstand high radial loads while also bearing certain axial loads. And the product structure is diverse, adaptable, and easy to install structural style This type of bearing has a combination of centripetal needle rollers and fully loaded thrust balls, or with thrust balls, or with thrust cylindrical rollers, or with angular contact balls, and can withstand unidirectional or bidirectional axial loads. It can also be designed according to the user's special structural requirements. Product accuracy Dimensional tolerances and geometric accuracy shall comply with JB/T8877. The diameter difference between the rolling needles is 2 μ m, and the accuracy level is G2 level The diameter of the inscribed circle before assembly of the non inner ring bearing meets the tolerance level F6 The radial clearance of the bearing meets the specified value of Group 0 in GB/T4604 Special precision level according to GB/T307 Execution standards GB/T16643-1996 Rolling bearings - Needle roller and thrust cylindrical roller combination bearings - External dimensions JB/T3122-1991 Rolling Bearings Needle Roller Bearings and Thrust Ball Combination Bearings Dimensions JB/T3123-1991 Rolling Bearings Needle Roller Bearings and Angular Contact Ball Combination Bearings Dimensions JB/T664-1993 Dimensions and tolerances of needle roller and bi-directional thrust cylindrical roller combination bearings for rolling bearings JB/T8877-2001 Technical Conditions for Needle Roller Combination Bearings in Rolling Bearings application area Widely used in various mechanical equipment such as machine tools, metallurgical machinery, textile machinery, and printing machinery, and can make mechanical system design more compact and agile

• Combination needle roller bearings are used at the bearing raceway design of the mating shaft, which has certain requirements for the hardness of the bearing; Alternatively, it can be fitted with an IR standard inner ring for sleeve processing, with no requirement for shaft hardness, resulting in a more compact structure
• Special Instructions The axial loadNKX of NKIA and NKIB series bearings shall not exceed 25% of the radial load. The support for alternating axial loads must be installed facing each other. The thrust bearing components must be subjected to a preload of 1% of the axial basic rated static load. When using a plastic holder (suffix TN), continuous operation should not exceed the operating temperature+120 ° C. The thrust bearing components should move freely in the bearing seat
• Bearing material:gcr15 or 52100
• Bearing type: Combination bearing Model: NKTB5911 Inner diameter (mm): 55 Outer diameter (mm): 80 Width (mm): 34
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