Excavator Tapered Roller Bearing R196Z -4 R196Z -4SA 196.85x241.3x23.812mm

1. Product Overview

1.Product Overview
R196Z-4 and R196Z-4SA are inch standard single row separable tapered roller bearings, widely matched for excavator final drive travel mechanisms, construction machinery differential and heavy agricultural equipment. Unified core mounting dimension: bore d=196.85mm, outer diameter D=241.3mm, overall assembly width T=23.812mm, interchangeable installation space for both versions.

Suffix technical difference explanation:

• R196Z-4: Standard base model, open type steel stamping cage, conventional raceway heat treatment, cost-effective for general heavy-load normal temperature working conditions;
• R196Z-4SA: Upgraded reinforced SA grade variant, optimized logarithmic roller contact curve, strengthened inner/outer ring surface quenching treatment, improved wear resistance, anti-vibration and high-temperature tolerance, lower running noise, longer service life under continuous heavy impact load.

Fully separable split structure: cone assembly (inner ring + tapered rollers + cage) and outer cup can be disassembled separately, greatly simplifying on-site installation, disassembly and maintenance of excavator travel reduction boxes. All rings and rolling elements adopt integral quenched GCr15 high-carbon chrome bearing steel, high hardness, strong impact resistance and wear resistance, stable bearing performance under alternating radial and axial combined load.

2. Technical Specifications

Unified Universal Base Parameters

Inner bore d: 196.85 mm
Outer diameter D: 241.3 mm
Total assembly width T: 23.812 mm
Inner ring width B: 23.017 mm
Outer ring width C: 17.462 mm
Fillet radius r: 2.1 mm
Structure: Single row separable tapered roller bearing, open without seal
Raw material: GCr15 bearing steel
Standard clearance: C0 normal clearance, C3 enlarged clearance customizable
Precision grade optional: P0 / P6 / P5
Working temperature range: -30℃ ~ 110℃ (R196Z-4SA up to 130℃)
Net weight: 2.107 kg

R196Z-4 Standard Version

Basic dynamic load rating Cr: 312 kN
Basic static load rating C0r: 408 kN
Grease limited rotating speed: 2850 r/min
Core feature: Standard heat treatment, cost control, suitable for intermittent heavy load construction equipment

R196Z-4SA SA Upgraded Version

Basic dynamic load rating Cr: 336 kN
Basic static load rating C0r: 435 kN
Grease limited rotating speed: 3100 r/min
Core feature: SA reinforced surface treatment, optimized roller contact, anti-wear, high temperature resistant, low noise, for 24h continuous heavy impact excavator final drive
Complete installation drawings, load characteristic curves and accelerated wear fatigue test reports can be provided upon customer request.

3. Key Advantages

1. Two fully interchangeable inch tapered roller bearings with identical overall installation dimensions, customers select standard R196Z-4 for cost-sensitive intermittent working conditions or upgraded R196Z-4SA for continuous heavy impact, high-temperature excavator travel assemblies.
2. Tapered roller large contact angle design, strong bearing capacity to bear heavy combined radial load + one-way axial thrust load, stable low-vibration operation under frequent forward/reverse impact of construction machinery.
3. Separable cone & cup split structure, convenient independent assembly and replacement, effectively reducing disassembly difficulty of excavator final drive and maintenance downtime loss.
4. Differentiated process configuration: R196Z-4 meets conventional heavy load demand with stable cost; R196Z-4SA adds exclusive surface strengthening heat treatment, reduces raceway peeling and roller abrasion failure rate, extends overhaul cycle by over 30%.
5. Multiple cage optional: standard stamping steel cage for mass cost reduction; solid brass cage for high-temperature long-time continuous heavy load harsh working conditions.
6. Customizable service support: C3 enlarged clearance, P5 high precision grade, OEM laser marking, special high-temperature anti-oxidation grease filling, brand neutral packaging.
   Effectively reduce excavator travel bearing replacement frequency and construction equipment shutdown maintenance loss.

4. Applications

This dual-model inch tapered roller bearing set is core wearing spare part for heavy construction & agricultural machinery:

• Excavator final drive travel reduction box main support bearing units, mini & medium excavator walking gearbox core bearings
• Heavy loader, road roller, bulldozer differential and axle positioning bearing assemblies
• Large agricultural harvester, tractor heavy-duty drive axle transmission bearings
• Mining underground transport vehicle wheel hub and reducer support bearings
• Aftermarket interchangeable inch standard heavy-duty single row tapered roller bearing
• Cost-effective two-grade interchangeable bearing solution for construction machinery repair plant and equipment OEM matching.

5. Why Choose GQZ Bearing

• 20 years professional manufacturing experience for inch heavy-duty tapered roller bearings including R196Z-4 & R196Z-4SA excavator travel series
• R196Z-4 and R196Z-4SA fully dimensionally interchangeable with international inch standard bearing dimensions, consistent mounting size and assembly tolerance.
• Complete OEM & ODM customization service supporting brass cage, C3 clearance upgrade, high precision grade and special high/low temperature lubricant filling.
• Full strict pre-delivery inspection: raw material hardness test, cone raceway grinding precision inspection, R196Z-4SA surface strengthening layer thickness detection, heavy load reciprocating impact fatigue cycle test.
• Professional tapered bearing engineering team provides excavator shaft and housing tolerance matching installation technical guidance within 24 hours.
• Stable mass production line with favorable bulk wholesale price for long-term construction machinery repair factories, excavator OEM and mining equipment manufacturers.
• We focus on differentiated standard & upgraded grade design, strong radial-axial combined load capacity, separable easy-maintenance structure and long-term win-win cooperation with global heavy machinery spare parts buyers.

6. Quality Control

• Raw material chemical composition and surface hardness inspection of GCr15 chrome bearing steel
• Precision turning, quenching tempering and superfinishing processing for inner and outer ring tapered raceways
• Differentiated targeted heat treatment process: R196Z-4 conventional integral quenching process; R196Z-4SA exclusive SA surface strengthening quenching + logarithmic roller contact curve grinding treatment.
• Classified targeted performance testing: R196Z-4 standard cycle load aging test; R196Z-4SA high-speed temperature rise, continuous heavy impact accelerated wear test.
• Tapered roller sorting, steel/brass cage assembly, full dimensional and appearance re-inspection before anti-rust oil packaging and shipment.
• Each batch of R196Z series bearings passes full sampling heavy-load reciprocating rotation fatigue test to guarantee stable long-term operation inside excavator final drive and heavy construction machinery reducers.

7. Get a Quote Now

If you need standard R196Z-4 cost-effective tapered roller bearings and upgraded anti-wear R196Z-4SA excavator travel bearings for construction machinery repair and OEM matching, send your inquiry directly.
You will receive complete professional supporting services after inquiry submission:

• Fast official factory quotation reply within 24 hours
• One-on-one shaft & housing matching tolerance installation technical guidance from professional inch heavy-duty tapered bearing engineers
• Customized bearing scheme suggestions including brass cage and C3 enlarged clearance upgrade options
• Competitive direct factory bulk wholesale price for mixed two-model large spare parts bulk orders
• Send your required purchase quantity of each model and equipment continuous heavy load & temperature working environment to obtain detailed formal quotation.

8. FAQ

Q1: What is the core difference between R196Z-4 and R196Z-4SA?
A1: Installation overall dimensions are completely consistent; R196Z-4 is standard base model with conventional heat treatment, low cost for intermittent heavy load equipment; R196Z-4SA is SA upgraded reinforced version with special surface strengthening treatment, better wear resistance, high temperature resistance and low noise performance, specially designed for 24h uninterrupted heavy impact excavator final drive.
Q2: What loads can R196Z series bearings bear?
A2: It can bear heavy combined radial load plus unidirectional large axial thrust load; bidirectional axial positioning requires two bearings installed back-to-back or face-to-face with reasonable preload.
Q3: What is the advantage of separable tapered roller bearing structure?
A3: The inner ring roller cage assembly and outer cup can be separated completely, convenient independent installation and replacement during excavator gearbox maintenance, avoiding overall disassembly of large transmission components.