GQZ 4T-LM503349/LM503310 Inch Tapered Roller Bearing 45.987×74.976×18mm Case Hardened Steel Separable Cone & Cup
4T-LM503349/LM503310 follows NTN standard designation:
- 4T: NTN 4-Top series, case hardened steel (surface hardened, tough core, superior impact resistance)
- LM503349 = inner cone assembly
- LM503310 = outer cup, fully separable structure
Single row imperial tapered roller bearing, capable of carrying combined heavy radial load and unidirectional axial thrust. Normally installed in opposed paired arrangement to withstand bidirectional axial forces. Open design enables convenient disassembly, inspection and periodic re-lubriion. Widely fitted on vehicle wheel hubs, agricultural tractors, harvesting machinery, light construction equipment and medium-load reduction gear assemblies.
Formal quotation will be sent within 24 hours upon your inquiry.
- Model
- 4T-LM503349/LM503310
- Dimensions
- d45.987 mm, D74.976 mm, T18 mm
- Inner ring width B
- 18 mm
- Outer ring width C
- 14 mm
- Net weight
- approx 0.41 kg
- Structure
- Single row tapered roller bearing
- Material
- Case hardened bearing steel, pressed steel cage
- Cross reference
- Interchangeable with Timken LM503349/LM503310
Complete dimension drawings and load data available on request.
- 4T 渗碳表面硬化钢材:表层高硬度耐磨,芯部韧性强,抗冲击,抗过载能力优于全淬透轴承
- 可分离内锥外圈结构,拆装维护便捷,允许单独更换损坏组件
- 同时承受较大径向载荷与单向轴向载荷,适配交变冲击工况
- 标准英制尺寸,可直接对标 Timken 同型号实现全球设备互换
- 优化滚子轮廓,降低边缘应力,控制温升,延长持续运行寿命
- Customizable: OEM laser marking, heavy-duty EP grease, P6 precision grade
- Light & medium commercial vehicle wheel hub assemblies
- Agricultural tractor axles, harvester transmission units
- Light construction machinery and conveyor drive positions
- Industrial medium-duty gear reducers and pump supporting shafts
- Rotary equipment subjected to vibration and alternating impact loads
- 25 years professional bearing manufacturer, products exported globally.
- Strict raw material hardness & carburizing layer inspection for 4T specifiion.
- 24-hour technical support for inch series cross-reference confirmation.
- Ample stock for machinery distributors.
- Precise dimensions and stable service performance.
- Carburizing heat treatment depth & hardness inspection
- Precision superfinishing for raceways and tapered rollers
- Contact angle and dimensional tolerance testing
- Rotational smoothness and noise inspection
If you need 4T-LM503349/LM503310 tapered roller bearings:
- Quick quotation within 24 hours
- Interchange model technical suggestion
- Competitive factory direct price
Contact our sales team for full datasheets and formal offer.
- Q1: Suffix & prefix explanation
- 4T = NTN 渗碳表面硬化钢系列；LM503349 = inner cone；LM503310 = outer cup.
- Q2: Main dimensions of 4T-LM503349/LM503310?
- 45.987×74.976×18 mm single row inch tapered roller bearing.
- Q3: 4T material advantage
- Surface hardening: wear-resistant surface + tough core, better shock resistance for vehicle & farm machinery.
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.