Sheave Bearing 240x360x160mm Cylindrical Roller Bearing E5048XNNTS1

1. Product Overview

E5048X NNTS1 belongs to E5000 series heavy-duty dedicated sheave double row cylindrical roller bearing, widely matched large tower cranes, heavy truck cranes, mine conveying rollers and port lifting pulley assemblies. Suffix definition: NN stands for double row cylindrical roller structure, T refers to outer ring integrated circlip positioning groove, S1 means double-sided double lip contact rubber sealing structure.

Standard metric overall dimensions: inner bore d=240mm, outer diameter D=330mm, overall width B=118mm. Adopts double row line contact roller layout, greatly improves radial static load capacity and impact resistance, adapts to long-term suspended heavy load intermittent lifting operation. Precision turning circlip groove on outer ring cooperates with standard retaining ring to limit axial displacement of pulley during operation, simplifying pulley frame assembly positioning without extra limiting sleeves.

All bearing inner ring, outer ring and cylindrical rollers are manufactured with fully quenched GCr15 bearing steel and ultra-precision mirror grinding arc raceway. Equipped with double-layer contact rubber seal, effectively block outdoor dust, mud, rain splash and mineral debris, prevent internal grease loss and rolling element corrosion. Widely applied to construction lifting machinery, underground mining transport equipment and port container hoist pulley rotating parts.

2. Technical Specifications

3. Core Advantages

1. E5048X large-size heavy pulley exclusive double row roller design, ultra-high static load bearing capacity, perfectly fit long-time suspended heavy load working condition of large lifting pulley.
2. S1 double-sided double lip all-weather sealing system, multi-layer isolation of dust and muddy water, greatly reduce grease leakage and bearing rust failure in open-air and mining sites.
3. Outer ring integrated T-type circlip positioning groove, matched standard retaining ring for reliable axial limiting, cut pulley frame processing and assembly cost.
4. Double row line contact roller uniform stress dispersion structure, absorb instantaneous impact load during hoist start, stop and heavy cargo lifting, avoid raceway peeling and fatigue crack.
5. Integral quenching heat treatment reaches HRC60~65 high hardness, excellent anti-fatigue and wear resistance, extend maintenance cycle of large crane pulley blocks.
6. Pre-filled high-viscosity complex lithium grease before delivery, adapt low-speed intermittent lifting operation, prolong regular refueling maintenance interval.
7. Unified universal pulley installation size, fully interchangeable with original E5000 series heavy sheave bearings, no pulley frame modification needed during maintenance replacement.
8. Complete customized service: manganese phosphate anti-rust surface treatment, OEM laser marking on outer ring, neutral export wooden case anti-rust packaging, high temperature resistant special grease filling.

4. Application Scenarios

E5048X NNTS1 double row sealed heavy sheave roller bearing is core ultra-heavy static load rotating spare part for lifting and mining conveying machinery:

• Large tower crane, heavy mobile truck crane main pulley block support bearing assemblies
• Port gantry container crane, ship heavy hoist pulley matching units
• Underground mine heavy material conveyor roller, mining lifting large sheave transmission positions
• Heavy overhead crane, metallurgical lifting equipment big pulley rotating components
• Aftermarket interchangeable E5000 series large size sealed heavy pulley roller bearing
• Cost-effective open-air dust-proof ultra-high load sheave bearing solution for crane maintenance factories, mining machinery OEM and port lifting equipment bulk procurement.

5. Why Choose GQZ Bearing

25 years professional manufacturing experience of E5000 series large sealed double row sheave roller bearings including E5048X NNTS1

E5048X NNTS1 fully dimensionally interchangeable with international standard heavy pulley bearings, consistent static load rating, double lip sealing performance and circlip groove assembly tolerance standards.

Complete OEM & ODM customization service supporting manganese phosphate anti-corrosion coating, special high temperature grease filling and custom surface laser marking.

Strict full pre-delivery inspection procedures: GCr15 raw material hardness test, roller dimensional sorting screening, long-cycle ultra-heavy static load aging test, repeated lifting alternating impact fatigue wear test.

Professional heavy lifting machinery pulley bearing engineering team provides one-on-one large crane pulley model matching, grease grade selection and circlip assembly installation technical guidance within 24 working hours.

Stable large-scale mass production workshop with competitive direct factory bulk wholesale price for long-term crane spare parts suppliers, mining conveying equipment manufacturers and port lifting machinery dealers.

We specialize in double row ultra-heavy load pulley bearing structure, all-weather double lip sealing design, outer ring integrated circlip positioning layout and long-term win-win cooperation with global heavy lifting and mining conveyor machinery spare parts buyers.

6. Quality Control

• Raw material chemical composition and hardness inspection for GCr15 bearing steel inner ring, outer ring and roller blanks
• Precision forging, quenching & tempering, ultra-mirror finish arc raceway grinding processing for large bearing inner and outer rings
• Cylindrical roller high-temperature quenching, superfinishing and automatic high-precision dimensional sorting production line
• Double lip sealing press fitting and outer ring circlip groove precision turning process, strictly control sealing interference and retaining ring matching clearance
• Classified targeted performance testing: E5048X NNTS1 long-cycle ultra-heavy static load aging test, repeated heavy cargo lifting impact fatigue test, dust & water splash long-term sealing durability detection
• Full dimensional tolerance and surface defect recheck before anti-rust oil coating and export wooden case packaging shipment
• Each production batch of E5048X NNTS1 bearings passes full sampling large pulley simulation heavy static load rotation test to guarantee stable long-term ultra-high load dust-proof support performance in large crane, mining and port lifting pulley equipment.

7. Get A Quote Now

If you need E5048X NNTS1 double row sealed heavy-duty sheave cylindrical roller bearings for large tower crane pulley maintenance and mining port lifting equipment OEM bulk matching, send your purchase inquiry directly.

You will receive full professional supporting services after submitting inquiry:

• Fast official factory formal quotation reply within 24 hours
• One-on-one large crane pulley model matching, grease grade selection and circlip installation technical guidance from professional heavy lifting machinery bearing engineers
• Customized bearing performance solutions including manganese phosphate anti-rust coating and high-temperature resistant grease upgrade options
• Competitive direct factory bulk wholesale price for large-volume spare parts orders
• Provide your required purchase quantity, lifting/mining equipment model and open-air heavy dust/water splash working environment to obtain detailed sealed formal quotation document.

8. FAQ

Q1: What is the meaning of each suffix of E5048X NNTS1?
A1: NN = double row cylindrical roller structure; T = outer ring integrated circlip positioning groove; S1 = double-sided double lip contact rubber seal, resistant to outdoor dust and water splash.

Q2: What advantages does double row structure have over single row pulley bearings?
A2: Double row line contact roller layout greatly improves dynamic and static load capacity, can bear ultra-heavy suspended cargo load of large cranes, stronger anti-impact performance during frequent lifting start and stop.

Q3: Can E5048X NNTS1 directly replace original imported large pulley bearings?
A3: Yes, boundary dimensions, load parameters and circlip groove size are fully consistent with standard E5000 series heavy sheave bearings, no pulley frame modification required during replacement.