Heavy Duty 32008 32010 Taper Roller Bearing Construction Machinery

These are all single-row tapered roller bearings but with different dimension series. 320 has the narrowest cross-section (light series). 322 is wider (medium), 323 is even wider (heavy), and 330 is a different width-to-diameter ratio. For the same bore diameter, 320 has the smallest OD and width, while 323 has the largest and the highest load capacity. Choose based on your available mounting space and load requirements.

Because the cone and cup are separable, you adjust clearance by setting the axial position of the cup relative to the cone. Common methods: (1) tighten a locknut on the shaft until the desired preload is reached, then lock it; (2) use shims between the cup and housing shoulder; (3) use a spacer between paired bearings. Always follow the equipment manufacturer's specification. Too much preload causes overheating and short life; too much clearance causes noise, vibration, and reduced load capacity

A single tapered roller bearing can carry radial load and axial load in one direction. However, because it generates an internal axial force under radial load, it is usually used in pairs (face-to-face DF, back-to-back DB, or tandem DT) to balance the axial force and carry load from both directions. Single bearings are sometimes used in applications where axial load is always in one direction and the opposing force is handled by another bearing type.

The cone is the inner ring assembly - it includes the inner ring, tapered rollers, and cage. The cup is the outer ring - a single tapered ring. They are separable: you can install the cup into the housing and the cone onto the shaft independently. This makes mounting easier and allows clearance adjustment. When ordering, you can order the complete bearing (cone + cup) or the cone and cup separately if you only need to replace one part.

For most automotive and industrial applications, grease lubrication is standard - use a high-quality lithium complex or polyurea grease with EP (extreme pressure) additives. For high-speed or high-temperature applications, oil lubrication (bath, splash, or circulating oil) is better. Always follow the equipment manufacturer's lubrication specification. Do not over-grease - fill the bearing housing to 30-50% of free space to avoid overheating.