220x290x37mm Excavator Bearing T4DB220 Heavy Load Taper Roller Bearing

1. Product Overview

T4DB220 is DB series metric large-size single row separable tapered roller bearing, unified core dimension inner bore d=220mm, outer diameter D=290mm, overall assembly width T=38mm, inner ring width B=35mm, outer ring width C=27mm, minimum fillet radius r=2.5mm.

DB series tapered roller design adopts moderate contact angle, capable of bearing heavy radial load together with one-way large axial thrust load, ideal for heavy equipment transmission shaft positioning and load support. Complete split separable structure: the integrated assembly of inner ring, tapered rollers and cage can be fully separated from outer ring, greatly simplifying installation, disassembly and field maintenance on large heavy-duty shafts.

Inner/outer rings and tapered rollers are manufactured from integral quenched GCr15 high-carbon chrome bearing steel with ultra-precision ground cone raceways to cut friction heat and running vibration. Stamped carbon steel cage accurately positions each roller to avoid collision wear under frequent heavy alternating impact loads. Widely applied to metallurgical rolling auxiliary shafts, mine heavy transport vehicle drive parts, port lifting crane rotary supports, large industrial heavy-duty reducers and heavy construction machinery transmission systems.

2. Technical Specifications

3. Key Advantages

1. 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
2. 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
3. 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
4. Precision superfinished cone raceway reduces friction coefficient and heat accumulation under high-load rotation, lowering risk of bearing ablation failure caused by overheating
5. 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
6. Customizable options: C3 enlarged radial clearance, P5 high precision grade, OEM laser marking, special high-temperature anti-oxidation grease filling
7. Effectively extend overhaul intervals of large metallurgy, mining and port heavy transmission equipment, cutting production downtime maintenance losses

4. Applications

This T4DB220 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 220mm 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
• T4DB220 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 T4DB220 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 T4DB220 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