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3 FAF. Fafnir Bearing - Div. of The Torrington Co. - U.S.A.- Subsidiary of Timken Bearing Co. 4 FAG. FAG Kugelfischer Georg Schafer & Co. - Germany and U.S.A Consolidated. Dimensions. Approx. Interchange. No. (Metric). Wgt. (lbs.) (Old No.) d. D. B. ADR. ISC. Nachi. NMB. NTN. RMB. SKF. 681-ZZ. -. 1. 3. 1.5 .0001.
d, 3, mm. D, 7, mm. B, 3, mm. d2, ≈, 3.85, mm. D2, ≈, 6.35, mm. r1,2, min. 0.1, mm. Abutment dimensions. da, min. 3.7, mm. da, max. 3.8, mm. Da, max. 6.5, mm. ra, max. 0.1, mm. Calculation data. Basic dynamic load rating, C, 0.178, kN. Basic static load rating, C0, 0.057, kN. Fatigue load limit, Pu, 0.002, kN. Reference
W637/3-2Z, 41.49. W637/8-2Z, 41.49. W637/8R-2Z, 49.66. W638/1.5-2Z, 50.51. W638/2.5-2Z, 54.40. W638/2-2Z, 40.21. W638/3-2Z, 40.21. W638/4-2Z, 61.81. W638/4R-2Z, 61.76. W638/5-2Z, 59.70. W638/5R-2Z, 60.55. W638/8-2Z, 62.16. W638/8R-2Z, 64.41. W63800-2Z, 73.70. W63800R-2Z, 82.02. W639/3-2Z, 66.68.