Bearing HM 903249 NTN

Key Features & Benefits

Supports combined loads: the tapered roller design allows the bearing to carry both significant radial load and axial (thrust) load.

Separable cone and cup: enables easier mounting, adjustment of preload and bearing alignment.

“Inch” or non‐standard size series: as indicated by bore and designations (44.987 mm) — useful for older or imperial‐based machinery.

Accurate dimensions and industrial grade quality from NTN—reliable for heavy duty applications.

Provides a robust solution where both radial and axial loads need to be supported while allowing for proper bearing seating.

Typical Applications

Gearboxes, transmissions, drive shafts and rotating equipment requiring both radial support and axial thrust control.

Industrial machinery and material‐handling equipment where shaft may see combined loads and must be axially located.

Retrofitting older or inch‐series machinery that use non‐metric bearing sizes.

Heavy equipment, mining, construction, or manufacturing where standard metric bearings may not fit or load requirements demand a heavier or specialized bearing.

Engineering / Ordering Considerations

Ensure you order the matched set: cone HM903248 and cup HM903210. Using non‐matched components may reduce life or performance.

Verify the axial load direction: this set supports thrust in one direction; if axial load in both directions is required, consider pairing two or using a different bearing arrangement.

Check shaft and housing fits: Because this is an inch‐series or non‐standard size, make sure the existing shoulders, fillet radius, and bore/housing dimensions are compatible.

Lubrication, speed, and tolerance class: confirm that the application’s speed, lubrication type (grease or oil), and tolerance requirements are suitable for this bearing. Some specs may list tolerance class P0/PN2 for this size.

Mounting and alignment: tapered roller bearings are sensitive to misalignment and improper seating. Correct preload/clearance and careful installation are crucial.

If sourced for replacement: check cross‐reference possibilities or verify whether the machine originally specified this exact series.