T4DB190 Single Row Taper Roller Bearing For Excavator 190x260x37mm

1.Product Overview

T4DB190 is DB series metric large-size single row separable tapered roller bearing, unified dimension inner bore d=190mm, outer diameter D=254mm, overall assembly width T=34mm, inner ring width B=31mm, outer ring width C=23mm, minimum fillet radius r=2.0mm.

DB series adopts moderate contact angle tapered roller structure, which can bear heavy radial load and unidirectional large axial thrust load at the same time, ideal for shaft positioning and load support of all kinds of heavy-duty industrial equipment. It features a fully separable split design: the integrated assembly of inner ring, tapered rollers and cage can be completely separated from the outer ring, greatly simplifying installation, disassembly and on-site maintenance on large heavy shafts.

Inner ring, outer ring and tapered rollers are made of GCr15 high-carbon chrome bearing steel with overall quenching and ultra-precision cone raceway grinding to reduce friction heat and running vibration. Stamped carbon steel cage accurately locates each roller to avoid collision abrasion under frequent heavy alternating impact loads. Widely applied to metallurgical rolling auxiliary shafts, mine heavy transport vehicle drive components, port lifting crane rotary supports, large heavy-duty gear reducers and heavy construction machinery transmission systems.

2.Technical Specifications

3.Key Advantages

• Large-size heavy-duty tapered roller layout, excellent comprehensive bearing capacity to withstand long-term continuous heavy radial and single-direction axial impact loads, stable low-vibration operation
• Fully separable split construction, inner roller-cage assembly detached from outer ring, easy mounting and removal on oversized heavy shafts without scratching bearing race surfaces
• Fully quenched high-hardness GCr15 rolling components, outstanding anti-fatigue and anti-deformation performance, resistant to harsh shock loads of mining and metallurgical production lines
• Precision superfinished cone raceway reduces friction coefficient and heat accumulation under high-load rotation, lowering risk of bearing ablation failure caused by overheating
• Dual cage selections: stamped steel cage for cost-effective general heavy load scenarios; brass cage anti-deformation for 24-hour continuous high-speed production equipment
• Customizable options: C3 enlarged radial clearance, P5 high precision grade, OEM laser marking, special high-temperature anti-oxidation grease filling

Effectively extend overhaul intervals of large metallurgy, mining and port heavy transmission equipment, cutting production downtime maintenance losses

4.Applications

This T4DB190 large single row tapered roller bearing serves as core replacement wear part for heavy industrial rotary equipment:

• Metallurgical rolling mill auxiliary transmission shafts, steel plant heavy conveyor roller support assemblies
• Underground mine heavy haul truck drive shafts, large mine belt conveyor head gearbox components
• Port container gantry cranes, lifting machinery boom rotary positioning bearing units
• Large heavy-duty industrial gear reducers, auxiliary speed reduction transmission components of small wind power equipment
• Heavy construction machinery, large loaders and road rollers main drive system spare parts
• Aftermarket interchangeable large-size separable tapered roller bearing for 190mm bore heavy industrial equipment
• Cost-effective high-load separable tapered bearing solution for maintenance of metallurgy, mining and port heavy machinery

5.Why Choose GQZ Bearing

• 25 years of professional manufacturing experience for DB series large tapered roller bearings
• T4DB190 fully dimensionally interchangeable with global standard DB series bearings, consistent load ratings, rotational precision and assembly tolerance indicators
• Full OEM & ODM customization service supporting brass cage, C3 clearance upgrade, high precision grade and special high/low temperature lubricant customization
• Strict full-process pre-delivery inspection: raw material hardness testing, cone raceway grinding precision detection, combined radial-axial heavy load reciprocating fatigue cycle testing
• Professional heavy bearing engineering team provides large shaft and housing tolerance matching installation guidance within 24 hours
• Stable mass production lines for large bearings with favorable bulk wholesale prices for long-term metallurgy, mining and port machinery manufacturers

We focus on heavy load anti-fatigue performance, separable easy-maintenance structure and long-term win-win cooperation with global heavy industrial equipment spare parts buyers

6.Quality Control

• Raw material chemical composition and surface hardness inspection of GCr15 chrome bearing steel
• Precision turning, quenching & tempering, mirror superfinishing processing for inner and outer ring cone raceways
• Constant temperature stress relief heat treatment to stabilize ring anti-deformation performance under long-term alternating heavy loads
• Targeted performance tests: combined radial-axial heavy load durability test, high-speed temperature rise inspection, roller sorting uniformity check
• Tapered roller classification, steel/brass cage assembly, full dimensional and appearance re-inspection before anti-rust oil packaging and shipment

Each batch of T4DB190 bearings undergoes full sampling heavy-load reciprocating rotation fatigue testing to ensure stable long-term operation inside heavy industrial transmission equipment

7.Get a Quote Now

If you need heavy-load separable T4DB190 single row tapered roller bearings for metallurgical rolling, mining conveyors and port crane heavy equipment maintenance, send your inquiry to us directly.

You will receive complete professional supporting services after submitting your inquiry:

• Fast official factory quotation reply within 24 hours
• One-on-one technical guidance on large shaft & housing matching tolerance installation from professional heavy tapered bearing engineers
• Customized bearing scheme suggestions including brass cage and C3 enlarged clearance upgrade options
• Competitive direct factory bulk wholesale price for bulk orders of heavy machinery spare parts

Send your required purchase quantity of each model and heavy-load continuous operation environment of your equipment to get detailed formal quotation

8.FAQ

1. Q1: What kinds of loads can T4DB190 bear?
   A1: It can bear heavy radial load plus unidirectional axial thrust load; bidirectional axial positioning requires two T4DB190 bearings installed in back-to-back or face-to-face arrangement.
2. Q2: What’s the advantage of separable tapered roller bearing structure?
   A2: The inner ring with roller and cage assembly can be separated from outer ring, convenient for assembly on extra-large heavy shafts and prevents scratches on bearing raceways during installation and disassembly.
3. Q3: Which industries are T4DB190 bearings mainly used in?
   A3: Specially applied to large heavy industrial equipment: metallurgical rolling mills, mining conveyors, port lifting cranes, heavy gear reducers and main drive systems of large construction machinery.