T7FC075-XL Metric Size Tapered Wheel Bearings T7FC 075/QCL7C 75x150x42mm

1. Product Overview

T7FC075-XL and T7FC075/QCL7C belong to ISO355 standard T7FC metric single row separable tapered roller bearing, unified overall installation dimension inner bore d=75mm, outer diameter D=150mm, total assembly width T=42mm, inner ring width B=38mm, outer ring width C=29mm, equipped with 30° large contact angle for powerful one-way axial load capacity.

Two suffix versions adopt differentiated core manufacturing processes for different working conditions:

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

Adopts fully separable split structure, the inner ring, tapered rollers and cage integrated assembly can be completely separated from outer ring, greatly simplifying shaft assembly, disassembly and on-site maintenance. All rings and rolling elements are made of GCr15 high-carbon chrome bearing steel with integral quenching, featuring high hardness, outstanding wear resistance and impact resistance. Widely used in heavy industrial gear reducers, construction machinery drive axles, metallurgical auxiliary transmission shafts, mining conveyor equipment and wind power auxiliary reduction boxes.

2. Technical Specifications

Unified General Parameters

T7FC075-XL

T7FC075/QCL7C

Complete installation drawings, load curve data and differentiated accelerated fatigue test reports can be provided upon request.

3. Key Advantages

1. Two fully interchangeable high-performance variants with identical installation dimensions, customers can match XL long-life version for uninterrupted production lines or QCL7C low-friction version for high-precision transmission according to equipment operating conditions
2. 30° large contact angle tapered roller layout, superb comprehensive bearing capacity to bear heavy combined radial load and unidirectional large axial thrust load, stable low-vibration operation under frequent forward and reverse impact
3. Fully separable split design, inner roller-cage assembly detached from outer ring, easy mounting and disassembly on heavy shafts, effectively avoid raceway scratch damage during maintenance
4. Targeted exclusive technical upgrades for two models: XL strengthens material fatigue resistance to reduce frequent replacement cost; QCL7C reduces internal friction heat and running noise to protect high-precision gearbox components
5. Double cage optional: stamped steel cage for cost-effective general heavy load use; solid brass cage anti-deformation for long-term high-temperature continuous operation
6. Customizable service: C3 enlarged clearance, P5 high precision grade, OEM laser marking, high-temperature anti-oxidation special grease filling

Effectively extend overhaul cycle of heavy reducer, construction and metallurgical transmission equipment, cut production downtime maintenance loss

4. Applications

This T7FC075 dual-model high-performance tapered roller bearing set is core replacement 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 75mm 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

5. Why Choose GQZ Bearing

• 25 years of professional production experience for T7FC series X-life and QCL7C high-performance tapered roller bearings
• T7FC075-XL and T7FC075/QCL7C are fully dimensionally interchangeable with international standard T7FC series bearings, consistent outline size, load rating and assembly tolerance
• 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 technical 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 load capacity, separable easy-maintenance structure and long-term win-win cooperation with global 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 and mirror superfinishing processing for inner and outer ring cone raceways
• Differentiated targeted heat treatment process: XL version X-life stress relief strengthening; QCL7C exclusive CL7C surface optimization treatment
• Classified performance testing: T7FC075-XL long-cycle accelerated fatigue aging test; T7FC075/QCL7C high-speed low friction torque temperature rise test
• Tapered roller sorting, steel/brass cage assembly, full dimension and appearance recheck before anti-rust oil packaging and shipment
• Each batch of T7FC075 series bearings passes full sampling heavy-load reciprocating rotation fatigue test to ensure stable long-term operation in heavy industrial transmission equipment

7. Get a Quote Now

If you need X-life long-life T7FC075-XL and low-friction T7FC075/QCL7C tapered roller bearings for heavy gearbox, construction and mining equipment maintenance, send your inquiry directly.

You will receive full professional supporting services after inquiry submission:

• Fast official factory quotation reply within 24 hours
• One-on-one shaft & housing matching tolerance installation technical guidance by professional high-performance tapered bearing engineers
• Customized bearing scheme including brass cage and C3 enlarged clearance upgrade options
• Competitive direct factory bulk price for mixed two-model large spare parts orders
• Send your purchase quantity of each model and equipment continuous speed & heavy load working environment to obtain detailed formal quotation

8. FAQ

• Q1: What is the core difference between T7FC075-XL and T7FC075/QCL7C?
  A1: The installation sizes are completely consistent; T7FC075-XL is X-life anti-fatigue upgraded model with higher fatigue limit load, suitable for 24-hour uninterrupted heavy load equipment; T7FC075/QCL7C adopts Q logarithmic contact curve and CL7C surface treatment, ultra-low friction torque, low noise and small temperature rise, matched for high-precision heavy-duty gearboxes.
• Q2: What loads can T7FC075 series bearings withstand?
  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.