NTN NNU4940KC1NAP4 bearing in China

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Bearing name NTN NNU4940KC1NAP4 bearing in China
Brand model NTN NNU4940KC1NAP4 bearing in China
Distributor NTN NNU4940KC1NAP4 bearing in China
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Quality Control

Below the following is Jobst’s production process and corresponding quality inspection: 

★ Material incoming: 100% inspection
★ Inner & outer rings turning: 100% inspection
★ Heat treatment: random inspection
★ Face grinding: 100% inspection
★ Centerless grinding: 100% inspection
★ Bore grinding: 100% inspection
★ Inner & outer groove grinding: random inspection
★ Inner & outer grooves superfinish grinding: 100% inspected
★ Assembly: 100% inspection
★ Grese filling: 100% inspection
★ Noise & vibration testing: 100% inspection
★ Packing & storing: the final 10% inspection before the formal shipment

Strict Quality Process Controls

Quality is built into many production processes with innovative “mistake-proofing” devices. Kilian systems are well documented and robust. The assembly process pictured below measures bearing components so the optimum ball size is selected. This optimized selection allows accurate control of the amount of play in the assembled bearings. Examples:
★ Optical comparators confirm component geometry
★ Electronic and other gauges conform to ANSI standards
★ Metallurgical, hardness and plating inspection
★ Bearing life cycle and durability testing
★ O.C. testing of all components before assembly