Sealed Roller Bearings Cylindrical Roller Bearing SL045020-PP-2NR 100x150x67mm

1. Product Overview

SL04 5020-PP-2NR is double row full complement cylindrical roller locating bearing, standard dimension d100×D150×B67mm, equivalent model NNF5020ADA-2LS.
Model suffix explanation: PP stands for double lip rubber seals on both sides for dust, mud and grease isolation; 2NR means two independent snap rings matched for outer ring groove axial positioning.
This bearing adopts cage-free full roller layout, filled with maximum quantity of cylindrical rollers to achieve ultra-high radial load capacity. Outer ring integrated central rib, inner ring with three guiding ribs, can bear slight bidirectional axial force while supporting huge radial load. Split inner ring structure brings easy assembly and disassembly; double side PP seals lock internal long-life lubricating grease, adapt outdoor dusty heavy-duty working conditions. Matched two snap rings limit axial displacement in housing bore, widely used for crane rope sheave, mining conveyor roller, heavy lifting machinery, metallurgical roller support and low-speed heavy-duty reducer shafts.
All inner ring, outer ring and rollers adopt fully quenched GCr15 bearing steel, superfinished raceway surface for uniform stress distribution, outstanding resistance to heavy static load and impact load.

2. Technical Specifications

3. Core Advantages

1. Full complement roller design without cage, maximum roller filling quantity, radial load capacity far exceeds caged double row roller bearings of same size, suitable for low-speed ultra-heavy load working conditions.
2. PP double lip sealing structure on both sides, effectively block dust, mud, iron powder and water splash, prevent grease leakage and foreign matter intrusion, extend service life for open-air lifting and mining equipment.
3. Outer ring with double annular grooves + matched 2NR two snap rings, realize reliable axial positioning inside housing, housing width can be smaller than bearing width to save installation space.
4. Split inner ring with three guiding ribs, rollers stably guided, avoid roller skew under heavy alternating impact load; separable inner ring and outer ring, convenient field disassembly and maintenance.
5. Integrated central rib outer ring, can bear moderate bidirectional axial thrust, satisfy combined radial and slight axial load of rope sheave and heavy conveyor rollers.
6. Full integral quenching heat treatment reaches HRC60–65 high hardness, superior anti-fatigue, anti-indentation and wear resistance, reduce frequent spare parts replacement of heavy machinery.
7. Standard universal metric installation dimension, fully interchangeable with global SL0450 series full roller bearings, no modification to existing shaft and housing during aftermarket replacement.
8. Comprehensive customized service: P4/P5 high precision upgrade, C3 enlarged internal clearance, OEM laser marking on outer ring surface, neutral export wooden case anti-rust packaging, high temperature heavy-duty lithium grease pre-filling.

4. Application Scenarios

SL04 5020-PP-2NR sealed full complement cylindrical roller bearing is core ultra-heavy radial load rotating spare part for lifting, mining and metallurgical equipment:

• Tower crane, gantry crane, marine winch steel wire rope sheave support bearing assemblies
• Mining belt heavy-duty conveyor roller, underground transport equipment heavy load matching units
• Metallurgical auxiliary conveying roller, steel plant low-speed heavy load rotating support positions
• Large construction machinery lifting arm pulley, heavy-duty planetary reducer low-speed output shaft components
• Port lifting machinery, logistics heavy roller frame, large industrial low-speed centrifugal equipment rotor bearings

Aftermarket interchangeable SL0450 series double row full roller sealed locating bearing
Cost-effective dust-proof ultra-heavy load bearing solution for crane manufacturers, mining metallurgy equipment OEM and heavy machinery maintenance factories bulk procurement.

5. Why Choose GQZ Bearing

• 25 years professional manufacturing experience of SL0450 series double row full complement cylindrical roller bearings including SL04 5020-PP-2NR
• SL04 5020-PP-2NR fully dimensionally interchangeable with international standard full roller locating bearings, consistent heavy load rating, sealing performance and snap ring matching tolerance standards.
• Complete OEM & ODM customization service supporting P4 super precision grade, C3 clearance adjustment and high temperature heavy-duty grease filling.
• Strict full pre-delivery inspection flow: GCr15 raw material metallographic & hardness test, cylindrical roller dimensional sorting screening, long-cycle heavy radial alternating impact aging test, continuous dust-proof sealing fatigue wear simulation test.
• Professional full roller bearing engineering team provides one-on-one heavy radial load calculation, rope sheave assembly layout and shaft housing installation technical guidance within 24 working hours.
• Stable large-scale mass production workshop with competitive factory direct bulk wholesale price for large batch single model orders, long-term stable supply for global lifting, mining and metallurgical heavy machinery spare parts buyers.
• We specialize in cage-free full roller heavy load structure, double lip PP dust-proof sealing + double snap ring positioning design, universal metric interchangeable mounting dimension standard and long-term win-win cooperation with heavy lifting industrial equipment suppliers.

6. Quality Control

• Raw material chemical composition, internal flaw and hardness inspection for GCr15 bearing steel split inner ring, outer ring and cylindrical roller blanks
• Precision forging, multiple tempering stress relief, multi-step ultra-precision raceway grinding process for inner and outer rings
• Cylindrical roller high-temperature quenching, superfinishing and high-precision automatic dimensional sorting production line
• Double lip PP seal press fitting, outer ring groove precision machining and two NR snap ring matching assembly process, strictly control sealing tightness and snap ring axial limiting clearance
• Targeted classified performance testing: SL04 5020-PP-2NR long-cycle ultra-heavy radial load aging test, repeated mud-dust splash sealing durability test, low-speed continuous heavy load wear detection
• Full dimensional tolerance, surface crack and raceway roughness recheck before anti-rust oil coating and export wooden case moisture-proof packaging shipment
• Every production batch of SL04 5020-PP-2NR bearings undergoes full sampling crane rope sheave heavy load simulation rotation test to guarantee stable long-term ultra-heavy radial load dust-proof support performance in lifting and mining heavy machinery equipment.

7. Get A Quote Now

If you need SL04 5020-PP-2NR double side sealed full complement cylindrical roller bearings with two snap rings for crane sheave manufacturing, mining conveyor equipment assembly and heavy lifting machinery maintenance bulk matching, send your purchase inquiry directly.
You will receive full professional supporting services after submitting inquiry:

• Fast official factory sealed formal quotation reply within 24 working hours
• One-on-one ultra-heavy radial load calculation, rope sheave housing positioning layout and heavy shaft installation technical guidance from professional full roller bearing engineers
• Customized bearing performance solutions including P4 high precision upgrade and C3 enlarged clearance options
• Competitive direct factory bulk wholesale price for large-volume SL04 5020-PP-2NR single model orders
• Provide your required purchase quantity, equipment working condition (outdoor dusty low-speed heavy load) and continuous operating temperature environment to obtain detailed formal quotation document.

8. FAQ

Q1: What does PP and 2NR stand for in model SL04 5020-PP-2NR?

A1: PP means double lip rubber seals on both sides for dust and grease sealing; 2NR refers to two complete snap rings matched for outer ring double grooves to realize axial positioning inside bearing housing.

Q2: What is the advantage of full complement roller structure?

A2: No retainer, fill maximum number of cylindrical rollers, radial bearing capacity is greatly improved, especially suitable for low-speed, static heavy load and frequent impact working conditions such as crane pulleys.

Q3: Can this bearing bear axial force?

A3: It is locating bearing with outer ring central rib, can bear small bidirectional axial thrust, mainly used to bear huge radial load.