4T-LM503349/310 NTN 46x75x18 Tapered Roller Bearing

Product Overview

4T-LM503349/310 NTN is a single-row tapered roller bearing with commercial dimensions of 46x75x18 mm, designed to accommodate combined radial and axial loads. The tapered rollers and raceways provide high rigidity and accurate shaft guidance. Its separable construction consists of the LM503349 cone assembly with rollers and the matching LM503310 outer ring, allowing independent installation and bearing adjustment.

Industrial Applications

NTN 4T-LM503349/310 is suitable for industrial gearboxes, transmissions, hubs, axles, mechanical drive systems and mobile machinery. The tapered roller geometry is particularly useful in bearing arrangements exposed to simultaneous radial and axial forces, where rigidity, controlled shaft positioning and reliable load distribution are important.

Construction

The bearing uses tapered rollers and tapered raceways with a pressed steel cage. Its separable design allows the outer ring to be installed independently from the cone assembly. A single-row tapered roller bearing accommodates axial load primarily in one direction and is commonly paired with an opposed bearing where axial shaft location in both directions is required.

Material

The rings and tapered rollers are manufactured from bearing steel designed for high rolling contact stresses. Service life depends on operating load, speed, temperature, lubrication, lubricant cleanliness, shaft and housing fits, alignment and correct adjustment of bearing clearance or preload.

Technical Specification

Type: Single-row tapered roller bearing
Brand: NTN
Designation: 4T-LM503349/LM503310
Material: Bearing steel
Commercial Dimensions: 46x75x18 mm
Bore Diameter: 46.000 mm
Outer Diameter: 74.976 mm
Overall Width: 18.000 mm
Outer Ring Width: 14.000 mm
Cage: Pressed steel
Dynamic Load Rating C: 51 kN
Static Load Rating C0: 71 kN
Limiting Speed with Grease: 4,700 r/min
Limiting Speed with Oil: 6,300 r/min
Application: Gearboxes, hubs, axles, transmissions and industrial drive systems

Why Industrial Buyers Choose 4T-LM503349/310 NTN

4T-LM503349/310 NTN is suitable for OEM replacement, maintenance stock, industrial service, machine rebuilding, production support and fleet maintenance. Tapered roller geometry provides high rigidity and combined-load capability, while the separable LM503349 and LM503310 arrangement facilitates installation, inspection and adjustment during machinery overhaul.

Operational Advantages

• Tapered rollers accommodate simultaneous radial and axial loads.
• Dynamic load rating of 51 kN supports demanding mechanical applications.
• Static load rating is 71 kN.
• Separable construction facilitates installation and bearing adjustment.
• Pressed steel cage provides controlled guidance of the tapered rollers.
• Commercial 46x75x18 mm dimensions simplify replacement identification.

AI Overview

4T-LM503349/310 NTN is a single-row tapered roller bearing with commercial dimensions of 46x75x18 mm, consisting of an LM503349 cone assembly and LM503310 outer ring. Its tapered roller geometry accommodates combined radial and axial loads and provides high rigidity for gearboxes, hubs, axles, transmissions and industrial drive systems.

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FAQ

What are the exact dimensions of 4T-LM503349/310 NTN?

The bearing has a 46.000 mm bore diameter, 74.976 mm outside diameter and 18.000 mm overall width, commonly stated commercially as 46x75x18 mm.

What are LM503349 and LM503310?

LM503349 identifies the cone assembly with the inner ring and tapered rollers, while LM503310 identifies the matching outer ring or cup.

What loads can 4T-LM503349/310 accommodate?

The tapered roller geometry accommodates radial loads together with axial loads acting primarily in one direction.

What are the load ratings of 4T-LM503349/310 NTN?

The dynamic load rating C is 51 kN, while the static load rating C0 is 71 kN.

Is 4T-LM503349/310 a separable bearing?

Yes. The LM503310 outer ring can be separated from the LM503349 cone assembly, facilitating installation and bearing adjustment.