FAG7034EA-P4-ULSuper-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.