Grease Lubriion JK0S070-A Tapered Roller Bearing with Seal JKOS070A 70x110x27mm

1.Product Overview

JK0S070-A and JK0SO70A are identical interchangeable part numbers; JK0SO70A is only a typographical variant of standard model JK0S070-A, belonging to JK0S metric integral single row tapered roller bearing series with single lip rubber contact seal on outer ring one side. Unified core mounting dimension: bore d=70mm, outer diameter D=110mm, inner ring width B=27mm, outer ring width C=26.5mm, compact diameter 0 heavy-load design.

Suffix A definition: single-side reinforced lip seal integrated structure, effectively isolate external dust, metal abrasive debris and splashed lubricating grease, reduce internal grease loss, eliminate extra housing sealing parts for semi-dust working conditions. Adopts separable cone & cup integral assembly: inner ring + tapered rollers + reinforced plastic cage can be fully detached from outer cup, convenient preload adjustment, independent component replacement and field maintenance of gearbox, vehicle axle and compact transmission assemblies.

All rings and rolling elements adopt integral quenched GCr15 high-carbon chrome bearing steel, precision logarithmic roller contact curve superfinishing and strict roller sorting, featuring high surface hardness, outstanding wear resistance, anti-fatigue and impact resistance, stable rotation under alternating radial & axial combined shock load. Widely matched for medium-small industrial gear reducers, light construction machinery drive axles, medium agricultural harvesters, mining conveying equipment and small wind power auxiliary reduction boxes.

2.Technical Specifications

Unified Universal Base Parameters (JK0S070-A = JK0SO70A fully interchangeable)

Inner bore d: 70 mm
Outer diameter D: 110 mm
Inner ring width B: 27 mm
Outer ring width C: 26.5 mm
Minimum fillet radius r1,r2: 1.5 mm
Calculation dimension a≈25mm, D1=104.8mm, d1=91.5mm
Mounting limit size: da max=78mm, db min=77mm, ra max=1.5mm
Structure: Integral single row tapered roller bearing, single lip rubber seal on outer ring, open inner side
Raw material: GCr15 bearing steel
Standard cage: Fiberglass reinforced high-strength plastic cage; solid brass cage optional for high-temperature working condition
Standard clearance: CN normal clearance, C3 enlarged clearance customizable
Operating temperature range: -30℃ ~ 110℃
Net weight: 0.93 kg
Matching snap ring: BR110
Calculation coefficient: e=0.43, axial factor Y=1.38, static axial factor Y0=0.76
Basic dynamic radial load Cr: 104 kN
Basic static radial load C0r: 159 kN
Fatigue limit load Cur: 20.1 kN
Grease limited rotating speed nG: 2900 r/min
Snap ring connection load capacity FBR: 49 kN
Max axial clamping force for paired installation: 20.8 kN
Complete installation drawings, load characteristic curves and dust resistance accelerated durability test reports can be provided upon customer request.

3.Key Advantages

1. JK0S070-A and JK0SO70A are 100% dimensionally interchangeable, only difference is writing format, no performance gap for installation and replacement
2. Exclusive single lip integrated sealing structure, self-contained dust-proof design, save cost of auxiliary sealing gaskets for gearbox housing, extend internal grease service cycle and reduce frequent refueling maintenance frequency
3. Compact JK0S series outline layout, high radial-axial combined load capacity under limited installation space, perfect matching for medium-small heavy-duty compact transmission assemblies
4. Separable cone & cup split structure, damaged inner or outer component can be replaced separately without full transmission disassembly, greatly cut equipment downtime and spare part procurement cost
5. Precision mirror superfinished cone raceway + logarithmic optimized roller contact curve, low friction torque, low running noise and small temperature rise under long-time continuous forward-reverse alternating impact load
6. Dual cage configuration options: lightweight plastic cage for cost control under general medium-heavy intermittent load; solid brass cage anti-deformation for 24h uninterrupted high-temperature harsh production lines
7. Full customizable service support: C3 enlarged radial clearance, P5 high precision grade, OEM laser marking, special high-temperature anti-oxidation grease filling, neutral export brand packaging
8. Standard integral stress relief quenching heat treatment, uniform internal material strength distribution, effectively delay raceway peeling and roller abrasion failure, extend equipment overhaul cycle over 25% compared with open unsealed tapered roller bearings

4.Applications

JK0S070-A / JK0SO70A single sealed integral tapered roller bearing is core wear spare part for medium-small heavy industrial rotary equipment:

• Medium-small horizontal/vertical industrial gear reducers, mining belt conveyor head transmission support bearing units
• Light loader, mini road roller, small excavator drive axle positioning bearing assemblies
• Medium heavy agricultural harvesters, medium tractor heavy-duty drive shaft transmission bearings
• Small wind power auxiliary reduction box, light port lifting machinery rotary positioning components
• Light metallurgical rolling mill auxiliary transmission shafts, medium industrial mixer main drive wearing parts
• Aftermarket interchangeable 70mm bore JK0S series single lip sealed integral tapered roller bearing
• Cost-effective dust-proof heavy-load bearing solution for gearbox OEM, construction machinery repair factory and agricultural equipment bulk matching.

5.Why Choose GQZ Bearing

• 25 years professional manufacturing experience for JK0S series sealed integral tapered roller bearings including JK0S070-A / JK0SO70A
• JK0S070-A and JK0SO70A fully dimensionally interchangeable with international standard JK0S series bearings, consistent mounting size, load rating and assembly tolerance indicators
• 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, sealing lip wear resistance tightness test, heavy load reciprocating impact fatigue cycle test
• Professional tapered bearing engineering team provides shaft and housing tolerance matching installation technical guidance within 24 hours
• Stable mass production lines with favorable bulk wholesale price for long-term medium-small gearbox manufacturers, light construction machinery and agricultural equipment suppliers
• We focus on self-contained sealed dust-proof integral design, strong radial-axial combined load capacity, separable easy-maintenance structure and long-term win-win cooperation with global compact transmission equipment spare parts buyers.

6.Quality Control

• Raw material chemical composition and surface hardness inspection of GCr15 chrome bearing steel
• Precision turning, quenching tempering and mirror superfinishing processing for inner and outer ring tapered raceways
• Exclusive single lip sealing groove precision turning process to guarantee tight contact between seal lip and inner ring surface, stable dust-proof performance
• Classified targeted performance testing: JK0S070-A long-cycle accelerated load aging test, semi-dust environment continuous operation wear resistance test, high-speed low friction torque temperature rise detection
• Tapered roller sorting, plastic/brass cage assembly, seal lip tightness inspection, full dimensional and appearance recheck before anti-rust oil packaging and shipment
• Each batch of JK0S070-A series bearings passes full sampling heavy-load reciprocating rotation fatigue test to guarantee stable long-term operation inside medium-small industrial reduction transmission equipment.

7.Get a Quote Now

If you need dust-proof single sealed JK0S070-A / JK0SO70A integral tapered roller bearings for medium-small gearbox, light construction and agricultural equipment maintenance and OEM matching, send your inquiry directly.
You will receive complete professional supporting services after submitting your inquiry:

• Fast official factory quotation reply within 24 hours
• One-on-one shaft & housing matching tolerance installation technical guidance from professional JK0S series tapered bearing engineers
• Customized bearing scheme suggestions including brass cage and C3 enlarged clearance upgrade options
• Competitive direct factory bulk wholesale price for mixed large spare parts bulk orders
• Send your required purchase quantity and equipment continuous speed, heavy-load & dust working environment to obtain detailed formal quotation.

8.FAQ

• Q1: What is the relation between JK0S070-A and JK0SO70A?
  A1: They are the same bearing with fully interchangeable dimensions and performance; JK0SO70A is only a writing typo variant of standard model JK0S070-A, no difference in installation, load and service life.
• Q2: What structural feature does JK0S070-A have?
  A2: It is JK0S series integral tapered roller bearing with single lip rubber contact seal on outer ring one side, separable cone and cup assembly, built-in lightweight plastic cage, good dust-proof performance for medium semi-open dust working conditions.
• Q3: What loads can JK0S070-A bear?
  A3: It can bear combined heavy radial load plus unidirectional axial thrust load; bidirectional axial positioning requires two bearings installed back-to-back or face-to-face with reasonable preload.