Full Compliment Ball Roller Bearing E5008X NNTS1 With Snap Rings 40x68x38mm

1. Product Overview

E5008X NNTS1 is double row sealed sheave cylindrical roller bearing specially designed for crane pulleys, lifting hoists and heavy conveying sheaves, belonging to E5000 series heavy-duty pulley bearings. Model suffix NNTS1 stands for double row roller structure, double side rubber contact seal and outer ring snap ring groove for installation positioning.
Standard metric boundary dimensions: inner bore d=40mm, outer diameter D=68mm, overall width B=38mm. Adopts double row cylindrical roller line contact structure to bear ultra-large radial static load; built-in double lip contact seals block dust, mud, water splash and metal debris in outdoor harsh lifting environment. Integral outer ring with precision snap ring groove, matched circlip limits axial displacement during pulley operation, simplify pulley assembly positioning. All rings and cylindrical rollers adopt fully quenched GCr15 bearing steel with ultra-precision mirror grinding raceway, uniform roller stress distribution, strong resistance to impact load and long-term static heavy load fatigue failure. Widely applied to construction crane pulley blocks, warehouse lifting hoists, port heavy conveyors and mining lifting equipment pulley rotating parts.

2. Technical Specifications

Model: E5008X NNTS1
Boundary dimensions(mm): d=40, D=68, B=38, mounting C=37, groove depth c=1.5, min fillet r=0.6
Structure: Double row cylindrical roller bearing, double side contact rubber seal, outer ring snap ring groove
Raw material: GCr15 high carbon chromium bearing steel for all rolling components
Basic dynamic radial load Cr:79kN
Basic static radial load C0r:125kN
Limiting rotating speed (oil lubrication):2500 r/min
Single bearing net weight:0.55kg
Operating temperature range:-20℃ ~ 120℃
Adapted working condition: Outdoor dust, splash water, intermittent heavy impact lifting load
Complete pulley installation drawings, snap ring matching dimension table and long-cycle static heavy load durability test reports can be provided upon customer request.

3. Core Advantages

• Dedicated sheave pulley optimized double row roller layout, ultra-high static load capacity, perfectly match long-time suspended heavy load working condition of lifting pulley.
• Double lip rubber contact double-sided sealing system, effectively isolate outdoor dust, rainwater, mud and mine debris, reduce internal grease loss and roller corrosion.
• Precision outer ring snap ring integrated groove design, supporting standard circlip axial limit, no extra positioning sleeve needed during pulley assembly, shorten installation process.
• Double row cylindrical roller line contact bearing structure, evenly disperse radial impact load generated by hoist start-stop lifting, avoid local raceway peeling damage.
• Full integral quenching heat treatment, surface hardness HRC60-65, excellent anti-fatigue and wear resistance, extend overhaul cycle of lifting pulley block.
• Pre-filled high-viscosity anti-wear lithium grease before delivery, suitable for intermittent low-speed operation of lifting equipment, extend refueling maintenance interval.
• Unified universal pulley installation dimension, fully interchangeable with original E5000 series sheave bearings, no pulley modification required during maintenance replacement.
• Comprehensive customized service: phosphate anti-rust surface treatment, OEM laser marking on outer ring, neutral export carton anti-rust packaging, high temperature resistant special grease filling.

4. Application Scenarios

E5008X NNTS1 double row sealed sheave roller bearing is core heavy static load rotating spare part for lifting and conveying machinery:

• Construction tower crane, mobile truck crane main pulley block rotating bearing assemblies
• Warehouse electric hoist, overhead crane heavy load pulley matching units
• Port cargo heavy conveyor roller, ship small lifting pulley support positions
• Mining underground light lifting equipment, material handling machinery sheave transmission components
• Aftermarket interchangeable E5000 series sealed pulley heavy-duty roller bearing
• Cost-effective anti-dust ultra-high static load sheave bearing solution for crane maintenance factories, lifting equipment OEM manufacturers bulk procurement.

5. Why Choose GQZ Bearing

• 25 years professional manufacturing experience of E5000 series sealed sheave double row roller bearings including E5008X NNTS1
• E5008X NNTS1 fully dimensionally interchangeable with global standard pulley bearings, consistent static load rating, double seal dustproof performance and snap ring groove assembly tolerance standards.
• Complete OEM & ODM customization service supporting phosphate anti-corrosion coating, special high temperature grease filling and custom surface laser marking.
• Strict full pre-delivery inspection flow: GCr15 raw material hardness test, roller dimensional sorting screening, long-cycle static heavy load aging test, alternating lifting impact fatigue wear test.
• Professional lifting machinery pulley bearing engineering team provides one-on-one crane pulley model matching, grease grade selection and snap ring assembly installation technical guidance within 24 working hours.
• Stable mass production workshop with competitive direct factory bulk wholesale price for long-term crane spare parts suppliers, lifting hoist manufacturing factories and port conveying equipment dealers.
• We specialize in double row heavy static load pulley bearing structure, double lip all-weather sealing design, snap ring integrated positioning outer ring layout and long-term win-win cooperation with global lifting and conveying 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 raceway grinding processing for bearing inner and outer rings
• Cylindrical roller high-temperature quenching, superfinishing and automatic dimensional sorting production line
• Double lip seal pressing and snap ring groove precision turning process, strictly control sealing interference and circlip matching clearance
• Classified targeted performance testing: E5008X NNTS1 long-cycle static heavy load aging test, repeated hoist lifting impact fatigue test, dust & water splash sealing durability detection
• Full dimensional tolerance and surface defect recheck before anti-rust oil coating and export carton packaging shipment
• Every production batch of E5008X NNTS1 bearings undergoes full sampling pulley simulation static load rotation test to guarantee stable long-term heavy load anti-dust support performance in crane and lifting hoist pulley equipment.

7. Get A Quote Now

If you need E5008X NNTS1 double row sealed sheave cylindrical roller bearings for tower crane pulley maintenance and lifting hoist 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 crane pulley model matching, grease grade selection and snap ring installation technical guidance from professional lifting machinery bearing engineers
Customized bearing performance solutions including 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 equipment model and outdoor dust/water splash working environment to obtain detailed sealed formal quotation document.

8. FAQ

1. Q1: What does NNTS1 suffix of E5008X NNTS1 mean?
   A1: NN = double row cylindrical roller structure; T = outer ring snap ring groove; S1 = double side contact rubber sealing design, all-weather dust and water splash resistance.
2. Q2: What is the core advantage compared with single row pulley bearings?
   A2: Double row roller line contact structure greatly improves static load capacity, can bear long-time suspended heavy load of lifting pulley, stronger anti-impact performance during hoist start and stop.
3. Q3: Can E5008X NNTS1 directly replace original crane pulley bearing?
   A3: Yes, boundary dimensions, load parameters and snap ring positioning groove size are completely consistent with standard E5000 series pulley bearings, no pulley seat modification needed during replacement.