Heavy Load T7FC055-XL Tapered Roller Bearing T7FC 055/QCL7C 55x115x34mm

T7FC055-XL and T7FC055/QCL7C comply with ISO355 T7FC metric standard single row separable tapered roller bearing, unified installation dimensions inner bore d=55mm, outer diameter D=110mm, total assembly width T=34mm, inner ring width B=30mm, outer ring width C=22mm, 30° large contact angle for powerful one-way axial bearing capacity.

Two suffix models adopt differentiated manufacturing processes for different operating scenarios:

• XL: X-life upgraded long-life variant, ultra-precision mirror superfinished raceway, strictly classified tapered rollers, optimized internal contact geometry and dedicated stress relief heat treatment, significantly improved fatigue limit load, ideal for 24h non-stop continuous heavy load production equipment;
• QCL7C: Explorer high-precision low-friction grade, Q logarithmic optimized contact curve matched with CL7C special surface strengthening treatment, ultra-low friction torque, low temperature rise and quiet stable rotation, excellent anti-vibration performance under alternating impact loads, perfectly matched for high precision heavy-duty gearboxes.

Fully separable split design: inner ring, tapered rollers and cage integrated assembly can be completely detached from outer ring, greatly simplifying shaft mounting, disassembly and field maintenance. All rings and rolling elements adopt integral quenched GCr15 high-carbon chrome bearing steel, featuring high hardness, superior wear resistance and impact resistance. Widely applied to heavy industrial gear reducers, construction machinery drive axles, metallurgical auxiliary transmission shafts, mining conveyor equipment and wind power auxiliary reduction boxes.

Inner bore d: 55 mm
Outer diameter D: 110 mm
Inner ring width B: 30 mm
Outer ring width C: 22 mm
Total assembly width T: 34 mm
Contact angle: 30°
Structure: Single row separable tapered roller bearing, open non-seal design
Material: GCr15 bearing steel
Cage options: Stamped steel cage / solid brass cage
Standard clearance: CN normal clearance, C3 enlarged clearance customizable
Operating temperature: -30℃ ~ 120℃
Net weight: 1.36 kg
Minimum fillet radius r: 1.2 mm
Calculation coefficient: e=0.78, axial factor Y=0.77, static axial factor Y0=0.44

Basic dynamic radial load Cr: 142 kN
Basic static radial load C0r: 174 kN
Fatigue limit load Cur: 25.6 kN
Grease limited speed: 7200 r/min
Continuous reference speed: 5100 r/min
Core feature: X-life anti-fatigue upgrade, extended service life for long-cycle uninterrupted heavy load equipment

Basic dynamic radial load Cr: 140 kN
Basic static radial load C0r: 178 kN
Fatigue limit load Cur: 18.9 kN
Grease limited speed: 5700 r/min
Continuous reference speed: 4200 r/min
Core feature: Q optimized contact + CL7C surface treatment, low friction, low noise high precision stable rotation
Complete installation drawings, load characteristic curves and differentiated accelerated fatigue test reports can be provided upon customer request.

1. Two fully interchangeable high-performance variants with identical installation outline sizes, customers select XL version for uninterrupted production lines or QCL7C low-friction version for high-precision transmission according to equipment working conditions
2. 30° large contact angle tapered roller layout, excellent comprehensive bearing capacity to bear heavy combined radial load + unidirectional large axial thrust load, stable low-vibration operation under frequent forward/reverse impact loads
3. Fully separable split construction, inner roller-cage assembly detached from outer ring, easy mounting and removal on heavy-duty shafts, effectively avoid raceway scratch damage during disassembly and maintenance
4. Exclusive targeted technical upgrades for two models: XL strengthens material anti-fatigue performance to reduce frequent replacement costs; QCL7C cuts internal friction heat and running noise to protect precision gearbox components
5. Dual cage optional: stamped steel cage cost-effective for general heavy load conditions; solid brass cage anti-deformation for long-term high-temperature continuous operation
6. Customizable options: C3 enlarged radial clearance, P5 high precision grade, OEM laser marking, high-temperature anti-oxidation special grease filling
   Effectively extend overhaul intervals of heavy reducer, construction and metallurgical transmission equipment, cut production downtime maintenance losses

This T7FC055 dual-model high-performance tapered roller bearing set is core replacement wear spare part for heavy industrial rotary equipment:

• Heavy-duty industrial gear reducers, mining belt conveyor head transmission support assemblies
• Large loader, road roller, excavator heavy drive axle positioning bearing units
• Metallurgical rolling mill auxiliary transmission shafts, steel factory heavy transport roller spare parts
• Small wind power auxiliary reduction box, port lifting machinery rotary positioning components
• Heavy agricultural harvesters, large industrial mixer main drive system wearing parts
• Aftermarket interchangeable 55mm bore high-performance single row tapered roller bearing
• Cost-effective dual-grade heavy-load separable tapered bearing solution for long-cycle or high-precision industrial equipment maintenance

• 25 years of professional manufacturing experience for T7FC series X-life and QCL7C high-performance tapered roller bearings
• T7FC055-XL and T7FC055/QCL7C are fully dimensionally interchangeable with international standard T7FC series bearings, consistent outline 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 customization
• Full strict pre-delivery inspection: raw material hardness test, cone raceway grinding precision inspection, differentiated heavy load reciprocating fatigue cycle test
• Professional tapered bearing engineering team provides shaft and housing tolerance matching installation guidance within 24 hours
• Stable mass production lines with favorable bulk wholesale price for long-term gearbox, construction and metallurgical machinery manufacturers
• We focus on differentiated high-performance design, strong radial-axial combined load capacity, separable easy-maintenance structure and long-term win-win cooperation with global industrial equipment spare parts buyers

• 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 cone raceways
• Differentiated targeted heat treatment process: XL version X-life stress relief strengthening process; QCL7C exclusive CL7C surface optimization strengthening treatment
• Classified targeted performance testing: T7FC055-XL long-cycle accelerated fatigue aging test; T7FC055/QCL7C high-speed low friction torque temperature rise test
• Tapered roller sorting, steel/brass cage assembly, full dimensional and appearance re-inspection before anti-rust oil packaging and shipment
• Each batch of T7FC055 series bearings passes full sampling heavy-load reciprocating rotation fatigue test to guarantee stable long-term operation inside heavy industrial transmission equipment

If you need X-life long-life T7FC055-XL and low-friction T7FC055/QCL7C tapered roller bearings for heavy gearbox, construction and mining equipment maintenance, 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 high-performance 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 speed & heavy-load working environment to get detailed formal quotation

Q1: What is the core difference between T7FC055-XL and T7FC055/QCL7C?
A1: Installation dimensions are completely consistent; T7FC055-XL is X-life anti-fatigue upgraded model with higher fatigue limit load, suitable for 24-hour uninterrupted heavy load equipment; T7FC055/QCL7C adopts Q logarithmic contact curve + CL7C surface treatment, ultra-low friction torque, low noise and small temperature rise, matched for high-precision heavy-duty gearboxes.
Q2: What loads can T7FC055 series bearings bear?
A2: It can bear 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.
Q3: What is the advantage of separable tapered roller bearing structure?
A3: The inner ring with roller and cage assembly can be separated from outer ring, convenient for assembly on heavy-duty shafts and avoids scratch damage to bearing raceways during installation and disassembly.