GQZ 31318J2/DF Face‑To‑Face DF Matched Tapered Roller Bearing 90×190×93mm Pre‑Set Duplex Bearing Set
The 31318J2/DF duplex tapered roller bearing is factory pre‑ground and face‑to‑face (DF) matched set with J2 optimized roller profile. DF face‑to‑face arrangement delivers good angular misalignment tolerance and bears combined radial and bidirectional axial loads simultaneously. Pre‑matched assembly eliminates manual pairing error for heavy‑duty rotary shafts requiring preload setting.
It is widely used for heavy gearboxes, mining reducers and engineering machinery main shaft assemblies.
???? Get a quote within 24 hours for your project
- Model
- 31318J2/DF
- Inner Diameter (ID)
- 90 mm
- Outer Diameter (OD)
- 190 mm
- Total Set Width T
- 93 mm
- Single bearing width
- 46.5 mm
- Structure
- Two single 31318J2 bearings, DF face‑to‑face duplex matched set
- Material
- GCr15 chrome bearing steel
- Cage
- Stamped high‑strength steel cage
- Precision Grade
- P0
- Approx Net Weight(set)
- 11.5 kg
- Dynamic Load Cr
- 457000 N
- Static Load C0r
- 630000 N
- Reference Speed(Grease)
- 1900 rpm
- Limiting Speed(Grease)
- 3400 rpm
???? Full technical data and drawings available upon request
- DF face‑to‑face matched structure allows moderate angular misalignment compensation
- J2 optimized roller geometry improves stress distribution for higher shock‑load resistance
- Factory pre‑ground matched set ensures consistent preload, saves on‑site pairing work
- Combined capacity for heavy radial load plus bidirectional axial thrust load
- Separable cone‑cup design enables convenient disassembly and inspection
- Custom design available (P6/P5 precision grade, special anti‑rust treatment, OEM laser marking)
???? Helps reduce maintenance cost and improve machine performance
This bearing is widely used in:
- Heavy‑duty industrial gear reducers and mining transmission main shafts
- Construction machinery, large hoist equipment and metallurgical rotary machinery
- Cement plant rotary equipment and bulk‑material handling drive assemblies
- General heavy machinery spindles requiring bidirectional axial positioning
???? Ideal for customers looking for reliable and long‑life bearing solutions
- 25+ years experience in industrial bearing manufacturing
- Exported to 50+ countries worldwide
- Rich experience in OEM DF duplex matched tapered roller bearing custom projects
- Strict duplex‑matching tolerance, contact angle and rotation performance inspection before shipment
- Fast response within 24 hours
- Stable supply for long‑term cooperation
???? We focus on quality, reliability, and long‑term partnership
- Raw material hardness inspection
- Precision grinding & superfinishing raceway machining
- Heat treatment metallurgy control
- Duplex matching tolerance, contact angle and rotation smoothness testing
- Final dimensional & appearance inspection before delivery
???? Ensuring consistent performance for every bearing set
Looking for a reliable bearing supplier?
???? Send your inquiry to get:
- Fast quotation within 24 hours
- Technical support from engineers
- Custom duplex‑matched tapered bearing matching solution suggestions
- Competitive factory price
???? Click “Send Inquiry” or contact us now
Q1: Can you supply single loose 31318J2 without DF pairing?
Yes, single open bearing and DB back‑to‑back matched sets are available.
Q2: What is your delivery time?
Standard duplex matched tapered bearings: 10‑18 days
Custom high‑precision specifiion products: depending on specifiions
Q3: Do you support bulk orders?
Yes, we provide stable supply for long‑term cooperation.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.