Repeatability in the Manufacturing Process

Predictable uniformity, or repeatability, in the manufacturing process is crucial to ensuring consistent bearing performance. If variations occur in the manufacturing process from part to part, the production line may make bearings that fall within the complete spectrum of the allowable tolerance standards. That inconsistency-- producing parts that go from one end of the range to the other--can lead in turn to variations in the performance of each bearing, either individually or from lot to lot. The narrower the variation in each step of the manufacturing process, the greater the consistency of each bearing’s performance. Not only does NTN manufacture close to the midpoint of tolerance limits, but our own internal standards require NTN parts to fall in an increasingly narrow range. NTN’s actual in-house standards are, in fact, more strict than ABEC and ISO standards.