Fafnir3MM9105WIDULSuper-Precision Angular Contact Ball Bearing – 25 mm ID, 47 mm OD, 12 mm Width, Open, 25° Contact Angle, Light Preload

Product Description

What this part is: Fafnir 3MM9105WI-SUL, a super-precision single row angular contact ball bearing built by The Timken Company. Bore Diameter: 25 mm. Outside Diameter: 47 mm. Overall Width: 12 mm. Number Of Rows: 1. Contact Angle: 25°. Bore Type: Straight. Closure Type: Open. Rolling Elements: Ball. Series: 9100. Base Number: 3MM9105WI. Precision Class: ABEC 7/9 / P4S. Cage Material: Phenolic. Cage Type: Machined, outer-ring guided. Preload: Light. Item Weight: 0.077 kg (0.17 lb). Decoding the designation: 3MM — Fafnir super-precision spindle prefix carrying a 25° contact angle. 9105 — series and bore code. The 9100 range maps to the ISO 70xx light family, so a 9105 is the 7005 envelope: 25 x 47 x 12 mm. WI — low shoulder on both rings. CR — phenolic outer-land-riding cage, machined and guided on the outer ring land. SU — single, universally ground, so any two pieces can be mounted back-to-back, face-to-face or in tandem without a spacer. L — light preload. World part number 7005E-T-P4S-SUL. What these specs mean in practice: Dynamic Load Rating: 12,300 N. Static Load Rating: 7,100 N. Limiting Speed: 30,500 rpm grease; 55,600 rpm oil. ISO dynamic radial rating per row: 11,200 N. Contact Angle: 25° — the higher-angle execution in the super-precision range. It carries more thrust and gives greater axial stiffness than a 15° bearing on the same envelope, at a lower speed ceiling. Precision Class: ABEC 7/9 / P4S — Timken’s super-precision grade, giving tight bore and outside diameter tolerance and low radial and axial runout for accurate spindle location. Cage Material: Phenolic. Cage Type: Machined, outer-ring guided. Phenolic is light and self-lubricating, which suits the high cage speeds of a spindle bearing. Preload: Light — a built-in light axial preset that fixes stiffness and removes internal play at speed. Item Weight: 0.077 kg (0.17 lb). Mounting data: Maximum shaft fillet radius: 0.6 mm. Shaft backing shoulder diameter: 29.9 mm. Housing backing shoulder diameter: 42.6 mm. Outer ring to-clear radius: 0.6 mm. Straight bore, mounting directly on a cylindrical spindle seat. The universally ground faces let two or more pieces of the same designation be stacked in any of the standard duplex arrangements, with the preload set by the ground face offset. Quantity and configuration: Unit Quantity: 1 Pc. One universally ground single bearing, open on both faces. Interchange guidance: Super-precision equivalents on the 7005 envelope at 25°: SKF 7005 ACD/P4A, FAG B7005-E-T-P4S-UL, NSK 7005 A5TYNSULP4, NTN 7005 UCG/GNP4, RHP 7005 A5TSU P4, Koyo 7005 A5-5G, SNFA EX 25 7CE3 and SNR 7005 HV U J74. A 15° execution on the same envelope, such as a 7005 CD/P4A, is a related size rather than a direct substitute, since it changes the thrust capacity and the axial stiffness of the spindle. Searchable variants of the number: 3MM9105WI-SUL, 3MM9105WISUL, 3MM9105WICRSUL, 3MM 9105 WI CR SUL, 3MM9105WI-DUL, 3MM-9105-WI-CR-DUL, 3MM204WIDUL, 7005-A, 7005A5.