FAG7034EAP4ULSuper-Precision Angular Contact Ball Bearing – 170 mm ID, 260 mm OD, 42 mm Width, Open, 25°, Light Preload, ABEC 7

Product Description

What this part is

FAG 7034EA-P4-UL super-precision angular contact ball bearing. Bore: 170 mm. Outside diameter: 260 mm. Width: 42 mm. Series: 7000. Base number: 7034. Single row, open, bearing steel rings and balls. Searchable forms of the designation include 7034EA-P4-UL, 7034EAP4UL, 7034-EA-P4-UL and 7034 E A P4 UL.

Decoding the designation

Contact Angle: 25°. Precision Class: ISO P4 / ABEC 7, from the P4 position. Matching and preload: universal with light preload, from the UL position, so any two pieces of this designation pair up back-to-back, face-to-face or in tandem.

What these specs mean in practice

A 25° contact angle carries more thrust and less speed than a 15° bearing of the same envelope, which suits large spindles taking heavy axial cutting load. Dynamic Load Rating: 224 kN (50,400 lbf). Static Load Rating: 240 kN (54,000 lbf). Limiting Speed: 3,400 rpm. Operating temperature: –30 to +100 °C. Mass: 16.5 lb (7.5 kg). ISO P4 tolerances give tighter running accuracy and lower running vibration than standard class, which is what holds a 170 mm spindle on centre. At this size the bearing is a large-frame machine tool item: high load capacity and rigidity at moderate speed.

Quantity and configuration

One bearing. Universal matching means the ground-in light preload is reached simply by clamping two pieces of the same designation together, with no shims or spacers.

Fitting notes

Rings are clamped solid against the shaft shoulder and the housing shoulder. Because preload is ground into the ring faces, this bearing carries no radial internal clearance class. At a 170 mm bore, shaft and housing fits and thermal growth dominate the mounted preload.

Interchange guidance

Equivalents at the same envelope, angle and light preload: SKF 7034 ACD/P4ADGA, NSK 7034A5TYNSULP4, Fafnir 3MM9134WI. The 7034 CD and 7034-C forms are a related size at 15° and carry different thrust and speed figures. The 7034-B-XL-MP-UA is the same 170 x 260 x 42 mm envelope in FAG’s standard-precision 40° B-series.