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| Customization: | Available |
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| Contact Angle: | 15° |
| Aligning: | Aligning Bearing |
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| Deep groove ball bearings | Crossed Roller Bearings | Rod end |
| Double row deep groove ball bearing | Needle roller bearings | Radial spherical plain bearings |
| Self-aligning ball bearing | Tapered roller bearings | Stainless Steel Bearings |
| Angular contact ball bearings | Spherical roller bearings | Insulating bearing |
| Thrust ball bearings | Cylindrical roller bearing | Ceramic bearing |
| Pillow Block Bearing | Cylindrical roller thrust bearings | High-temperature bearings |
Double-row steel balls: Two rows of balls arranged symmetrically at contact angles (typically 15°-40°).
Inner & outer rings: Angular contact raceways optimized for load distribution.
Integrated cage: Made of nylon or brass to synchronize double-row ball movement.
Bidirectional axial load capacity: Handles axial loads in both directions alongside radial loads.
High rigidity: Symmetric layout minimizes deformation, ideal for precision positioning.
Compact design: Dual-row integration saves installation space.
Superior load capacity:
Axial load: 50%-80% higher than single-row bearings.
Combined loads: Simultaneously handles radial and axial loads (e.g., gearboxes, spindles).
High precision & rigidity:
Reduces vibration and misalignment in precision equipment (e.g., CNC spindles, robotic joints).
Simplified installation:
Single-unit design eliminates pairing requirements (unlike single-row angular contact bearings).
Extended service life:
Optimized stress distribution minimizes localized wear.
Contact angle:
15°: Prioritizes high speed, low axial loads (e.g., small motors).
25°-40°: Prioritizes heavy axial loads (e.g., industrial machinery).
Dynamic/static load ratings:
Calculate based on operational conditions (refer to ISO 281 standards).
Speed limits:
Slightly lower than single-row bearings (20%-30% reduction due to friction).
Materials:
Chrome steel (GCr15): General-purpose for standard industrial environments.
Stainless steel (440C/316L): Corrosion-resistant for food/chemical industries.
Ceramic hybrid: High-speed, anti-electrolysis (e.g., semiconductor equipment).
Sealing types:
Contact seals (2RS): Dust/waterproof, slightly reduces speed capability.
Non-contact seals (ZZ): Low friction, ideal for high-speed applications.
Installation:
Use thermal or hydraulic tools to avoid deformation.
Ensure proper shaft/housing tolerances (recommended H7/k6 fit).
Preload adjustment:
Eliminate clearance via shims or threaded preload (follow manufacturer guidelines).
Lubrication:
High-speed: Synthetic oils (e.g., PAO).
High-temperature/heavy loads: High-temperature grease (NLGI Grade 2).
| Designation | Principal dimensions | Basic load ratings | Speed ratings | ||||
| dynamic | static | Reference speed | Limiting speed | ||||
| d[mm] | D[mm] | B[mm] | C[kN] | C0[kN] | [r/min] | [r/min] | |
| 3307 A-2ZTN9/MT33 | 35 | 80 | 34.9 | 54 | 38 | 8 500 | 8 500 |
| 3307 ATN9 | 35 | 80 | 34.9 | 54 | 38 | 8 500 | 8 500 |
| 3307 DJ1 | 35 | 80 | 34.9 | 52.7 | 41.5 | 9 000 | 8 000 |
| 3208 A | 40 | 80 | 30.2 | 48 | 36.5 | 9 000 | 8 000 |
| 3208 A-2RS1 | 40 | 80 | 30.2 | 48 | 36.5 | 5 600 | |
| 3208 A-2RS1/C3 | 40 | 80 | 30.2 | 48 | 36.5 | 5 600 | |
| 3208 A-2RS1/C3LVT114F7 | 40 | 80 | 30.2 | 48 | 36.5 | 5 600 | |
| 3208 A-2RS1TN9/MT33 | 40 | 80 | 30.2 | 48 | 36.5 | 5 600 | |
| 3208 A-2Z | 40 | 80 | 30.2 | 48 | 36.5 | 9 000 | 8 000 |
| 3208 A-2Z/C3 | 40 | 80 | 30.2 | 48 | 36.5 | 9 000 | 8 000 |
| 3208 A-2ZTN9/MT33 | 40 | 80 | 30.2 | 48 | 36.5 | 9 000 | 8 000 |
| 3208 ATN9 | 40 | 80 | 30.2 | 48 | 36.5 | 9 000 | 8 000 |
| 3308 A | 40 | 90 | 36.5 | 65.5 | 48 | 7 500 | 7 500 |
| 3308 A-2RS1 | 40 | 90 | 36.5 | 65.5 | 48 | 5 000 | |
| 3308 A-2RS1TN9/MT33 | 40 | 90 | 36.5 | 65.5 | 48 | 5 000 | |
| 3308 A-2Z | 40 | 90 | 36.5 | 65.5 | 48 | 7 500 | 7 500 |
| 3308 A-2ZTN9/MT33 | 40 | 90 | 36.5 | 65.5 | 48 | 7 500 | 7 500 |
| 3308 ATN9 | 40 | 90 | 36.5 | 65.5 | 48 | 7 500 | 7 500 |
| 3308 DMA | 40 | 90 | 36.5 | 68.9 | 57 | 8 000 | 7 000 |
| 3308 DNRCBM | 40 | 90 | 36.5 | 49.4 | 41.5 | 8 000 | 7 000 |
| 3308 DTN9 | 40 | 90 | 36.5 | 68.9 | 57 | 8 000 | 7 000 |
| 3209 A | 45 | 85 | 30.2 | 52 | 41.5 | 7 500 | 7 500 |
| 3209 A-2RS1 | 45 | 85 | 30.2 | 52 | 41.5 | 5 300 | |
| 3209 A-2RS1/C3 | 45 | 85 | 30.2 | 52 | 41.5 | 5 300 | |
| 3209 A-2RS1TN9/MT33 | 45 | 85 | 30.2 | 52 | 41.5 | 5 300 | |
| 3209 A-2Z | 45 | 85 | 30.2 | 52 | 41.5 | 7 500 | 7 500 |
| 3209 A-2ZTN9/MT33 | 45 | 85 | 30.2 | 52 | 41.5 | 7 500 | 7 500 |
| 3209 ATN9 | 45 | 85 | 30.2 | 52 | 41.5 | 7 500 | 7 500 |
| 3309 A | 45 | 100 | 39.7 | 75 | 53 | 7 500 | 6 700 |
| 3309 A-2RS1 | 45 | 100 | 39.7 | 75 | 53 | 4 800 | |
Q1: What about the MOQ? Can you accept a sample order?
A: Our company MOQ is 1pc, and we can accept sample orders.
Q2: Can you accept OEM/ODM?
A: Yes, we can.Customizing according to your requirements or drawing.
Q3: Do you supply door-to-door service?
A: By air or express(DHL, FEDEX, EMS, etc.)
Q4: Could you tell me the materials of your bearings?
A: Chrome steel, carbon steel, stainless steel, ceramic, and plastic material.
Q5: Are you a factory or trading company?
A: We have our factory, JUDONG Bearing is specializes in manufacturing and exporting bearings.
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