SKF234416-BM1/SPDouble-Direction Axial Angular Contact Thrust Ball Bearing – 80 mm ID, 125 mm OD, 54 mm Total Width, 60 Degree Contact Angle, Machined Brass Cage, SP Precision

Product Description

What this part is

SKF 234416-BM1/SP double-direction axial angular contact thrust ball bearing. Series 2344. Bore: 80 mm. Outside diameter: 125 mm. Total width: 54 mm. Outer ring width: 27 mm. Contact angle: 60°. Rolling elements: balls, two rows, one row loaded in each axial direction.

Decoding the designation

BM1: machined brass cage, retained on the shaft washer. SP: special precision, a restricted-tolerance class with tightened running accuracy and closer axial location. Base number: 234416. Punctuation variants in circulation: 234416 BM1/SP, 234416BM1SP, 234416-BM1-SP.

What these specs mean in practice

A 60° contact angle puts almost all capacity into thrust. Basic dynamic axial load rating: 57 kN. Basic static axial load rating: 173 kN. On a double-direction 60° thrust type the static figure sits well above the dynamic figure — that is the normal relationship for this family. Axial rigidity: 640 N/µm. Preload force: 400 N. Fatigue load limit, axial: 15.7 kN. Limiting speed: 6 000 rpm on oil, 4 500 rpm on grease.

Quantity and configuration

One complete bearing. The design is separable and supplied as a matched component set: two shaft washers, one spacer, one housing washer and two ball-and-cage assemblies, matched at the factory and used together.

Fitting notes

Straight bore. Shaft shoulder diameter: 98.5 mm to h12. Outer ring shoulder diameter: 117 mm to H12. Maximum shaft recess radius: 1.1 mm. Distance between pressure-cone apexes: 207 mm. Lubrication hole diameter: 3.2 mm with a 6.5 mm lubricating groove in the outer ring. Operating temperature range: -30 °C to 120 °C.

Application types

Ball screw support on machining centres, lathes, grinding and milling machines, and screw-jack and press applications where axial rigidity sets the accuracy of the feed axis.

Interchange guidance

Dimensionally and functionally equivalent designations: FAG 234416-M-SP and 234416 M.SP, NSK 80TAC20D. All share the 80 x 125 x 54 mm envelope and the 60° angle.