FAGB7017E.T.P4A.ULSpindle Angular Contact Ball Bearing – 85 mm ID, 130 mm OD, 22 mm Width, Open, 25° Contact Angle, Light Preload, Phenolic Cage

Product Description

What this part is:

FAG B7017E.T.P4A.UL is a single-row super-precision spindle bearing from the B70–E family, 85 mm bore, 130 mm outside diameter, 22 mm width. It is a universal bearing, ground so that any two or more pieces mount together as a back-to-back, face-to-face or tandem set with light preload established by the ground faces alone.

Decoding the designation:

B70 identifies the adjusted spindle bearing series. E sets the contact angle at 25°. T is the laminated fabric cage. P4A is the FAG restricted-tolerance class, equivalent to ABEC 7. U marks the bearing as a universal single piece and L sets light preload, so the UL pair of letters together reads as universal light.

What these specs mean in practice:

A 25° contact angle carries more thrust and less speed than a 15°, which suits milling and boring spindles where the cut pushes hard along the axis. Basic dynamic radial load rating is 63 kN and basic static radial rating is 41.5 kN, with a radial fatigue load limit of 4.2 kN. Limiting speed is 9 500 rpm on grease and 15 000 rpm on oil.

Cage and preload behaviour:

The laminated fabric cage is outer-land piloted and runs quietly at speed with good oil retention in the cage pockets. Light preload develops 540 N of axial preload force and 209 N/µm of axial rigidity per bearing, with an axial lift-off force of 1 573 N.

Quantity and configuration:

Sold as single universal bearings. Two pieces make a duplex set, three make a triplex set, and the preload class is already ground in, so no spacers or shims are required to set it.

Fitting notes:

Shaft shoulder diameter 93 mm to h12, outer ring shoulder diameter 122 mm to H12, maximum recess radius 1 mm. Distance between the apexes of the pressure cones is 36.1 mm. Operating temperature range runs from −30 °C to 100 °C. Oil injection pitch diameter falls between 99 mm and 103.8 mm.

Interchange guidance:

25° universal light-preload crosses in the same envelope are SKF 7017 ACD/P4AGB, NSK 7017A5TYNSULP4 and Timken Fafnir 3MM9117WI. SKF 7017 ACD/P4AGA is extra light preload. A 7017 carrying a 15° angle code — FAG B7017-C, SKF 7017 CD — is a related size, because the angle changes the thrust and speed capability.