SKF234420SPDouble-Direction Axial Angular Contact Thrust Ball Bearing – 100 mm ID, 150 mm OD, 60 mm Total Width, 60 Degree Contact Angle, Machined Brass Cage, SP Precision

Product Description

What this part is

SKF 234420SP double-direction axial angular contact thrust ball bearing. Series 2344. Bore: 100 mm. Outside diameter: 150 mm. Total width: 60 mm. Outer ring width: 30 mm. Contact angle: 60°. Rolling elements: balls, two rows, one row loaded in each axial direction.

Decoding the designation

SP: special precision, a restricted-tolerance class with tightened running accuracy and closer axial location. BM1 execution: machined brass cage. Base number: 234420. Punctuation variants in circulation: 234420 SP, 234420 BM1/SP, 234420-BM1-SP, 234420M.SP.

What these specs mean in practice

A 60° contact angle puts almost all capacity into thrust. Basic dynamic axial load rating: 68 kN. Basic static axial load rating: 229 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: 843 N/µm. Preload force: 685 N. Fatigue load limit, axial: 18.8 kN. Limiting speed: 5 000 rpm on oil, 3 800 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: 120.5 mm to h12. Outer ring shoulder diameter: 140.5 mm to H12. Maximum shaft recess radius: 1.5 mm. Distance between pressure-cone apexes: 249.5 mm. Lubrication hole diameter: 4.8 mm with a 9.5 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 234420-M-SP and 234420 M.SP, NSK 100TAC20D. All share the 100 x 150 x 60 mm envelope and the 60° angle.