4800RPM T7FC070-XL X-Life Tapered Roller Bearing T7FC 070/QCL7C 70x140x39mm

1.Product Overview
T7FC070-XL and T7FC070/QCL7C share unified metric dimension d70×D140×T39mm, belonging to T7FC ISO355 single row separable tapered roller bearing series, two optimized high-performance versions for different working conditions.
T7FC070-XL adopts X-life optimized design, upgraded internal geometry, surface finish and heat treatment process, dynamic load capacity increased by 20% and service life extended about 70% compared with standard type, low heat generation and stable high-speed operation.
T7FC070/QCL7C equips Q optimized contact surface plus CL7C high-strength structure, larger contact angle up to 30°, outstanding anti-impact and heavy load resistance, specially developed for heavy differential, mining reducer and construction machinery transmission shafts.
Both models are split separable cone & cup assembly, inner cone with rollers and cage can be separated from outer cup, convenient separate installation of shaft and housing. All core parts adopt fully quenched GCr15 bearing steel, ultra-precision inclined raceway grinding, uniform line contact stress distribution, reliably bear combined radial load and one-way axial thrust. Widely matched automotive differential, heavy industrial gearbox, mining crusher transmission, large construction machinery walking drive and hydraulic pump support assemblies.

2. Technical Specifications

Model Range: T7FC070-XL, T7FC070/QCL7C
Unified boundary dimensions(mm): Bore d=70, OD D=140, Total width T=39, Cone width B=35.5, Cup width C=27
Min fillet radius r=3mm, r1=3mm
Contact angle: 30°
Structure: Single row tapered roller bearing, separable cone & cup, stamped steel cage, open design
Raw material: GCr15 high carbon chromium bearing steel for cone, cup and tapered rollers
Performance parameter differentiation

1. T7FC070-XL
• Basic dynamic radial load Cr: 219kN
• Basic static radial load C0r: 237kN
• Fatigue load limit Pu: 38kN
• Limiting speed: Grease 5800r/min, Oil 7200r/min
• Net weight: 2.59kg
• Feature: X-life long-life optimized, low friction, high speed adaptability
2. T7FC070/QCL7C
• Basic dynamic radial load Cr: 177kN
• Basic static radial load C0r: 242kN
• Limiting speed: Grease 2400r/min, Oil 3400r/min
• Net weight: 2.65kg
• Feature: QCL7C heavy-duty reinforcement, strong impact resistance, ultra-high static load capacity

General operating temperature range: -40℃ ~ 120℃
Mounting shoulder reference: da max=82mm, Da min=106mm, Da max=126mm
Complete differential/reducer installation drawings, load matching guide and long-cycle alternating impact durability test reports can be provided upon customer request.

3. Core Advantages

1. Two high-performance versions for targeted selection: XL version for medium-high speed continuous operation; QCL7C version for low-speed heavy impact, one model size covers multiple heavy transmission working conditions.
2. Large 30° contact angle tapered roller layout, excellent composite radial-axial load bearing capacity, stable operation under frequent shifting impact of automobile differential and mining equipment.
3. Separable cone and cup split structure, inner cone pre-installed on shaft, outer cup pressed into housing separately, easy disassembly without damaging shaft journal during equipment overhaul.
4. X-life optimized T7FC070-XL: upgraded raceway surface and internal geometry, effectively reduce lubricant loss and heat accumulation, extend maintenance interval and service life greatly.
5. QCL7C reinforced T7FC070/QCL7C: optimized roller contact stress distribution, strong resistance to overload shock load, suitable for heavy-load start-stop working conditions of construction and mining machinery.
6. Precision stamped steel cage evenly limits tapered rollers, effectively avoid roller skew, deviation and shedding under variable heavy long-time continuous rotation.
7. Full integral quenching heat treatment reaches HRC60–65 high hardness, outstanding anti-fatigue, anti-peeling and wear resistance, reduce equipment spare parts replacement frequency.
8. Standard unified metric installation dimension, fully interchangeable with global T7FC070 series tapered roller bearings, no modification to existing shaft and housing during replacement; comprehensive customized service: P4/P5 high precision upgrade, C3 enlarged clearance, OEM laser marking, neutral export carton anti-rust packaging, high-temperature extreme pressure grease pre-filling.

4. Application Scenarios

T7FC070-XL / T7FC070/QCL7C high-performance single row tapered roller bearings are core composite load rotating spare parts for automotive, mining and heavy industrial transmission equipment:

• T7FC070-XL Matching Equipment: Medium heavy automobile transmission differential, medium-size industrial gear reducer, hydraulic pump high-speed support shaft, medium-sized blower rotor assembly
• T7FC070/QCL7C Matching Equipment: Heavy mining crusher drive gearbox, large excavator walking reducer, metallurgical auxiliary heavy transmission shaft, heavy truck differential bearing positions
• General Application Fields: Heavy conveyor drive assembly, agricultural large harvester transmission, marine light-duty reduction box, heavy-duty centrifugal pump rotating support components

Aftermarket interchangeable T7FC070 series high-performance tapered roller bearing set
Cost-effective long-life anti-impact heavy load bearing solution for auto differential manufacturers, mining metallurgical equipment OEM and heavy machinery maintenance factories bulk procurement.

5. Why Choose GQZ Bearing

1. 25 years professional manufacturing experience of T7FC metric series high-performance tapered roller bearings including T7FC070-XL and T7FC070/QCL7C
2. Two versions fully dimensionally interchangeable with international standard T7FC070 bearings, consistent load rating, speed tolerance and assembly matching standards.
3. Complete OEM & ODM customization service supporting P4 super precision grade, C3 clearance adjustment and high-temperature extreme pressure grease filling.
4. Strict full pre-delivery inspection flow: GCr15 raw material metallographic & hardness test, tapered roller dimensional sorting screening, long-cycle radial-axial alternating heavy impact aging test, continuous heavy load fatigue wear simulation test.
5. Professional tapered roller bearing engineering team provides one-on-one composite load calculation, double bearing back-to-back preload pairing scheme and differential/reducer shaft installation technical guidance within 24 working hours.
6. Stable large-scale mass production workshop with competitive factory direct bulk wholesale price for mixed batch orders of XL and QCL7C two versions, long-term stable supply for global auto parts, mining and heavy machinery spare parts buyers.

We specialize in separable cone-cup tapered roller structure, X-life long-life & QCL7C heavy-duty dual optimized design, universal metric interchangeable mounting dimension standard and long-term win-win cooperation with heavy industrial transmission equipment suppliers.

6. Quality Control

1. Raw material chemical composition, internal flaw and hardness inspection for GCr15 bearing steel cone, cup and tapered roller blanks
2. Precision forging, multiple tempering stress relief, ultra-precision inclined raceway multi-step grinding process for cone and cup
3. Tapered roller high-temperature quenching, superfinishing and high-precision automatic dimensional sorting production line
4. Stamped steel cage stamping forming and automatic roller assembly process, strictly control roller assembly clearance and circumferential uniform distribution
5. Targeted classified performance testing: Separate aging test for T7FC070-XL high-speed long-cycle operation and T7FC070/QCL7C heavy impact overload fatigue test, high-temperature grease long-cycle durability detection
6. Full dimensional tolerance, surface crack and raceway roughness recheck before anti-rust oil coating and export carton moisture-proof packaging shipment

Every production batch of two-version bearings undergoes full sampling differential and heavy reducer simulation rotation test to guarantee stable long-term composite radial-axial load support performance in automotive, mining and construction machinery equipment.

7. Get A Quote Now

If you need T7FC070-XL X-life long-life and T7FC070/QCL7C heavy-duty reinforced tapered roller bearings for automobile differential manufacturing, mining heavy reducer assembly and heavy machinery maintenance bulk matching, send your purchase inquiry directly.
You will receive full professional supporting services after submitting inquiry:

• Fast official factory sealed formal quotation reply within 24 working hours
• One-on-one composite radial-axial load calculation, two-version model selection guidance and double bearing back-to-back preload pairing technical guidance from professional tapered roller bearing engineers
• Customized bearing performance solutions including P4 high precision upgrade and C3 enlarged clearance options
• Competitive direct factory bulk wholesale price for mixed batch delivery of T7FC070-XL and T7FC070/QCL7C

Provide your required purchase quantity, equipment working condition (high-speed continuous / heavy impact overload) and operating temperature environment to obtain detailed formal quotation document.

8. FAQ

1. Q1: What is the difference between T7FC070-XL and T7FC070/QCL7C?
   A1: Same installation size, different performance orientation. T7FC070-XL is X-life optimized long-life version, high limiting speed, low friction, fit medium-high speed continuous operation; T7FC070/QCL7C is QCL7C heavy-duty reinforced type, higher static load capacity, strong anti-overload impact performance, suitable for low-speed heavy impact mining and construction machinery.
2. Q2: What load can T7FC070 series tapered roller bearings bear?
   A2: It bears large radial load plus unidirectional axial thrust simultaneously; install two bearings back-to-back to realize bidirectional axial load bearing for automobile differential and vertical heavy spindle.
3. Q3: What is the advantage of separable cone-cup structure for differential assembly?
   A3: Inner cone with rollers can be pre-installed on drive shaft, outer cup pressed into differential housing separately, convenient assembly and disassembly during overhaul, no damage to shaft journal and housing bore.