HM212049/HM212011 Inch Tapered Roller Bearing 66.675x122.238x38.1mm Truck Axle Bearing

1. Product Overview

HM212049/HM212011 is single row inch tapered roller bearing set, separable cone HM212049 and cup HM212011, dimension 66.675×122.238×38.1mm.

Code Definition

• HM212049: Cone assembly with crowned tapered rollers and stamped steel cage
• HM212011: Single flange outer cup, fully separable for easy maintenance

Tapered roller design bears combined heavy radial and one-way axial thrust load. Crowned rollers eliminate edge stress, superfinished raceways reduce friction heat. Widely used in heavy truck wheel hubs, semi-trailer axles, agricultural tractors and construction equipment.

2. Technical Specifications

Model: HM212049/HM212011
d:66.675mm, D:122.238mm, T:38.1mm
Cone width B:38.354mm, Cup width C:29.718mm
Min fillet r:3.5mm
Dynamic load Cr:206kN, Static load C0r:279kN
Grease limiting speed:3000r/min
Net weight:1.84kg
Structure: Single row separable cone & cup open type
Cage: Stamped steel cage
Material: GCr15 bearing steel, HRC60-65
Clearance: Standard CN, C3 customizable
Precision: P0 standard, P6/P5 optional
Temp range: -40℃~120℃
Drawings and durability test reports available on request.

3. Core Advantages

1. Separable cone and cup, install or replace parts without full shaft disassembly
2. Logarithmic crowned rollers, uniform stress distribution and longer fatigue life
3. Large composite load capacity for wheel hub and heavy transmission positions
4. Tough stamped steel cage stable under continuous vibration and impact
5. Ultra-smooth contact surfaces lower running temperature and prevent bearing burnout
6. Standard inch size, fully interchangeable with mainstream international brands
7. Custom clearance, high-temperature grease and exclusive laser marking available

4. Application Scenarios

• Heavy commercial vehicles: Truck hubs, semi-trailer axles
• Agricultural machinery: Large tractor and harvester transmission shafts
• Construction equipment: Loader wheel hubs, small excavator drive parts
• Mining transport: Ore carrier vehicle wheel assemblies

Fit OEM assembly and aftermarket replacement of mobile heavy machinery with composite radial and axial loads.

5. Why Choose GQZ Bearing

25 years production experience of inch tapered roller bearings. Vacuum smelting GCr15 steel with complete quenching and tempering heat treatment for stable hardness. Full OEM & ODM customization for clearance, lubricant and surface marking. Strict full-process inspection covers raw material test, raceway superfinishing, roller sorting and vibration aging test. 24-hour technical support for load matching, shaft tolerance selection and regular relubrication plans. Factory direct bulk price, stable stock for global vehicle and construction machinery buyers.

6. Quality Control

1. Raw material chemical composition and hardness inspection
2. Integral quenching and stress relief tempering
3. CNC turning and ultra-precision raceway grinding
4. Precise stamped steel cage forming
5. Dust-free assembly with quantitative grease filling
6. High-speed aging and radial-axial composite load fatigue testing
7. Final full dimension inspection, anti-rust coating, neutral export carton packaging

Each batch passes vibration and noise test to guarantee stable operation in dusty and bumpy harsh environments.

7. Get A Quote

Send inquiries for HM212049/HM212011 bearings used on heavy truck axles, tractors and construction loaders.
Services after inquiry:

1. Standard quotation document delivered within 24 working hours
2. Technical guidance for paired bearing installation, tolerance matching and maintenance lubrication
3. Upgrade options: P5 high precision grade, C3 enlarged clearance, high-temperature synthetic grease
4. Competitive factory bulk price for large quantity orders

Please state order quantity, load, speed and working environment for complete formal quotation.

Q1: Do you supply separable inch tapered roller bearing set HM212049/HM212011?

A1: Yes. We produce full series inch tapered roller bearings interchangeable with international standard specifications, accept flexible OEM & ODM customized orders.

Q2: Key structural features and parameters of HM212049/HM212011?

A2: Inch dimension 66.675×122.238×38.1mm, separable HM212049 cone and HM212011 cup, crowned tapered rollers and stamped steel cage. Dynamic load 206kN, static load 279kN, limiting speed 3000r/min, designed for heavy vehicle axles bearing composite radial and unidirectional axial loads.

Q3: What equipment uses HM212049/HM212011 bearings?

A3: Heavy truck wheel hubs, semi-trailer axles, agricultural tractors and construction loaders. Separable cone-cup design simplifies maintenance; crowned rollers resist heavy impact loads; steel cage maintains stable performance under long-term bumpy operation.

Q4: Can you provide batch inspection and performance test certificates?

A4: Yes. All tapered roller bearings are manufactured under ISO 9001 quality management system. Every batch passes raw material hardness test, full dimensional measurement and vibration fatigue durability test. Complete inspection documents are available upon formal request.

Q5: Delivery time and logistics for HM212049/HM212011?

A5: Stocked bearings can be shipped within 7–15 working days. Sea freight, air freight and door-to-door express are optional. Neutral anti-rust moisture-proof packaging and full customs clearance documents are provided for all bulk orders.