ZwickerDeep Groove Ball Bearing – 30 mm Bore, 47 mm OD, 9 mm Width, Thin 619 Section, Open, P6 Precision, Matched Pair

Product Description

What this part is: Zwicker 61906P6G2 is a single-row deep groove ball bearing in the thin 619 section, built to P6 precision and supplied as a universally matchable duplex pair. Bore Diameter: 30 mm. Outside Diameter: 47 mm. Overall Width: 9 mm. Precision Class: ABEC 3 / P6. Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Bearing Material: Chrome steel. Lubricant: Grease or oil. Series: 619. Base Number: 61906. Unit Quantity: 2 Pcs. Decoding the designation: 619 — ISO dimension series 18, the thin section of the deep groove range. The 47 mm outside diameter and 9 mm width on a 30 mm bore are the narrowest standard proportions offered at this bore. 06 — bore code 06, giving 30 mm. P6 — ISO Class 6 precision, ABEC 3: tighter bore, outside diameter, width and running accuracy than a standard-class bearing. DU — universally matchable duplex, so the two rings are face-ground as a set. What these specs mean in practice: A 619 section puts the smallest possible radial and axial envelope around a 30 mm shaft, which is what makes it a spindle, encoder and instrument-drive bearing rather than a general power-transmission one. P6 tolerances hold the bore and outside diameter closer than standard class, so the fit into a housing bore is more repeatable and the shaft runs truer. Open construction leaves both faces clear for an external seal, a labyrinth or a circulating lubricant supply. Quantity and configuration: Unit Quantity: 2 Pcs. Universally matchable duplex pair: the ring faces are ground together, so the two clamp up as a set in any orientation without ground spacers. Interchange guidance: This bearing is also written 61906P6G2, 61906-P6-G2, 61906 P6 G2 and 6906. Cross-Reference 1: 6906, the older ISO designation, same 30 x 47 x 9 mm size. Cross-Reference 2: SKF 61906. Cross-Reference 3: FAG 61906. Cross-Reference 4: NSK 61906. Cross-Reference 5: NTN 61906. Cross-Reference 6: Koyo 61906. The SKF, FAG, NSK, NTN and Koyo 61906 bearings share the 30 x 47 x 9 mm open, single-row envelope but are standard class with looser tolerances than this P6 execution, so they are a near fit where P6 running accuracy is the reason for the part.