JK0S030 One Side Sealed Taper Roller Bearing JKOS030 30x55x19mm

1. Product Overview

JK0S030 belongs to metric JK0S series integral single row tapered roller bearing, built-in single lip rubber contact seal on outer ring one side, self-retaining integrated assembly, unified core mounting dimension inner bore d=30mm, outer diameter D=55mm, inner ring width B=19mm, outer ring width C=18.5mm, ultra-compact diameter 0 miniature heavy-load design.

One-side integrated sealing structure can effectively isolate fine dust, metal abrasive debris and splashed lubricant, reduce internal grease volatilization and loss, suitable for semi-open light dust working environments without extra housing sealing gaskets. Adopts separable cone & cup self-retaining structure: inner ring + tapered rollers + fiberglass reinforced plastic cage assembly can be completely detached from outer cup, convenient paired O-type installation, automatic clearance matching without manual preload adjustment, greatly simplifying assembly and maintenance of miniature gearboxes, light machinery and compact axle 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, high surface hardness, excellent wear resistance, anti-fatigue and impact resistance, stable low-vibration rotation under alternating radial & axial combined shock load. Widely matched for miniature industrial gear reducers, light agricultural machinery axles, small conveyor idlers, textile auxiliary transmission equipment and miniature lifting pulley assemblies.

2. Technical Specifications

3. Key Advantages

• Ultra-compact JK0S miniature outline layout, stable radial-axial combined heavy load capacity under limited tiny installation space, perfect matching for mini gearboxes and compact light transmission equipment
• Built-in single lip integrated dust-proof seal, self-contained sealing structure saves cost of auxiliary sealing parts for small housing, extend internal grease service cycle and reduce frequent refueling maintenance frequency
• Self-retaining separable cone & cup split structure, paired O-type installation automatically obtains standard internal clearance without manual preload calibration, lower assembly technical threshold and shorter production cycle
• Precision mirror superfinished cone raceway + logarithmic optimized roller contact curve, low friction torque, low running noise and small temperature rise during long-time continuous forward-reverse alternating impact operation
• Dual cage configuration options: lightweight reinforced plastic cage cost-effective for general intermittent light-heavy load scenarios; solid brass cage anti-deformation for 24h uninterrupted high-temperature harsh production lines
• 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
• 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 20% compared with open unsealed miniature tapered roller bearings

4. Applications

JK0S030 single sealed integral tapered roller bearing is core wear spare part for miniature heavy industrial rotary equipment:

• Mini horizontal/vertical small industrial gear reducers, light conveyor belt idler support bearing units
• Light mini agricultural machinery, small garden machinery drive axle positioning bearing assemblies
• Textile spinning auxiliary transmission shafts, miniature lifting pulley and cable roller rotary components
• Small packaging equipment, printing machinery compact drive system wearing parts
• Aftermarket interchangeable 30mm bore JK0S series single lip sealed integral tapered roller bearing
• Cost-effective dust-proof compact heavy-load bearing solution for mini gearbox OEM, light machinery repair factory and small agricultural equipment bulk matching.

5. Why Choose GQZ Bearing

• 25 years professional manufacturing experience for JK0S series sealed integral miniature tapered roller bearings including JK0S030
• JK0S030 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 miniature shaft and housing tolerance matching installation technical guidance within 24 hours
• Stable mass production lines with favorable bulk wholesale price for long-term mini gearbox manufacturers, light agricultural machinery and small conveying equipment suppliers
• We focus on self-contained sealed dust-proof compact integral design, balanced radial-axial combined load capacity, separable easy-maintenance structure and long-term win-win cooperation with global miniature 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 long-term dust-proof performance
• Classified targeted performance testing: JK0S030 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 JK0S030 bearings passes full sampling heavy-load reciprocating rotation fatigue test to guarantee stable long-term operation inside miniature industrial reduction transmission equipment.

7. Get a Quote Now

If you need dust-proof single sealed JK0S030 integral tapered roller bearings for mini gearbox, light agricultural and conveying 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 large spare parts bulk orders
• Send your required purchase quantity and equipment continuous speed, heavy-load & light-dust working environment to obtain detailed formal quotation.

8. FAQ

1. Q1: What structural feature does JK0S030 bearing have?

   A1: It is JK0S series compact integral tapered roller bearing with single lip rubber contact seal on outer ring one side, self-retaining separable cone and cup assembly, built-in lightweight reinforced plastic cage, good dust-proof performance for semi-open light dust miniature equipment.

2. Q2: What loads can JK0S030 bear?

   A2: It can bear combined radial load plus unidirectional axial thrust load; bidirectional axial positioning requires two bearings installed back-to-back/O-type with reasonable preload.

3. Q3: What is the advantage of JK0S integral bearing over ordinary open tapered roller bearings?

   A3: JK0S series comes with integrated single-side seal, self-retaining roller-cage assembly, paired installation automatically matches clearance without manual adjustment, fewer assembly accessories, lower overall equipment manufacturing cost.