1300 Series Self-Aligning Ball Bearings
BMT Bearings supplies 1300 Series Self-Aligning Ball Bearings designed for applications where shaft misalignment, installation deviation, or housing deflection cannot be fully eliminated. These bearings are widely used in electric motors, pumps, agricultural equipment, and light industrial machinery that require stable rotation and reduced maintenance frequency.
We support OEM customization, bulk industrial supply, and export packaging solutions for distributors and equipment manufacturers.
We support OEM customization, bulk industrial supply, and export packaging solutions for distributors and equipment manufacturers.
The 1300 Series Self-Aligning Ball Bearing features a spherical outer raceway and dual-row ball structure, allowing the inner ring to adjust angular misalignment during operation.
This design helps reduce edge loading and abnormal stress caused by installation errors or shaft deflection. In practical applications such as motor systems or pump assemblies, this helps maintain smoother rotation and more stable operating conditions.
Each bearing is manufactured using high-carbon chromium bearing steel (commonly GCr15 or equivalent materials depending on specification), and processed through heat treatment, precision grinding, and automatic assembly lines.
Technical Parameters
| Bearing Model | Dimensions (mm) | Basic Load Ratings (kN) | Limiting Speed (rpm) | Weight | ||||
| d | D | B | Cr | Cor | Grease | Oil | (kg) | |
| 1300 | 10 | 35 | 11 | 7.2 | 3.1 | 16, 000 | 22, 000 | 0.06 |
| 1301 | 12 | 37 | 12 | 8.1 | 3.6 | 15, 000 | 20, 000 | 0.07 |
| 1302 | 15 | 42 | 13 | 9.56 | 4.5 | 14, 000 | 19, 000 | 0.095 |
| 1303 | 17 | 47 | 14 | 11.2 | 5.8 | 13, 000 | 18, 000 | 0.125 |
| 1304 | 20 | 52 | 15 | 12.8 | 6.65 | 12, 000 | 16, 000 | 0.165 |
| 1305 | 25 | 62 | 17 | 17.5 | 9.8 | 10, 000 | 14, 000 | 0.26 |
| 1306 | 30 | 72 | 19 | 22 | 13.5 | 9, 000 | 12, 000 | 0.38 |
| 1307 | 35 | 80 | 21 | 26.5 | 17.5 | 8, 500 | 11, 000 | 0.52 |
| 1308 | 40 | 90 | 23 | 32 | 21.8 | 8, 000 | 10, 000 | 0.72 |
| 1309 | 45 | 100 | 25 | 38.5 | 27.5 | 7, 200 | 9, 500 | 0.95 |
| 1310 | 50 | 110 | 27 | 45 | 33.2 | 6, 700 | 9, 000 | 1.25 |
| 1311 | 55 | 120 | 29 | 52.5 | 40.5 | 6, 300 | 8, 500 | 1.6 |
| 1312 | 60 | 130 | 31 | 58 | 46.5 | 6, 000 | 8, 000 | 1.95 |
| 1313 | 65 | 140 | 33 | 65.5 | 54 | 5, 600 | 7, 500 | 2.35 |
| 1314 | 70 | 150 | 35 | 72 | 61 | 5, 300 | 7, 000 | 2.85 |
| 1315 | 75 | 160 | 37 | 80.5 | 70.5 | 5, 000 | 6, 700 | 3.4 |
| 1316 | 80 | 170 | 39 | 88 | 78 | 4, 800 | 6, 300 | 4 |
| 1317 | 85 | 180 | 41 | 96.5 | 88 | 4, 500 | 6, 000 | 4.65 |
| 1318 | 90 | 190 | 43 | 105 | 98.5 | 4, 200 | 5, 600 | 5.35 |
| 1319 | 95 | 200 | 45 | 115 | 110 | 4, 000 | 5, 300 | 6.15 |
| 1320 | 100 | 215 | 47 | 128 | 125 | 3, 800 | 5, 000 | 7.2 |
| 1321 | 105 | 225 | 49 | 138 | 138 | 3, 600 | 4, 800 | 8.3 |
| 1322 | 110 | 240 | 50 | 152 | 155 | 3, 400 | 4, 500 | 9.8 |
| 1324 | 120 | 260 | 55 | 175 | 185 | 3, 200 | 4, 200 | 12.5 |
| 1326 | 130 | 280 | 58 | 198 | 215 | 3, 000 | 4, 000 | 15.2 |
| 1328 | 140 | 300 | 62 | 225 | 250 | 2, 800 | 3, 600 | 18.5 |
| 1330 | 150 | 320 | 65 | 248 | 285 | 2, 600 | 3, 400 | 22 |
For specific application requirements or custom solutions, please contact our technical support team.
Engineering Features
1. Self-aligning structure for installation tolerance
The spherical raceway design allows limited angular adjustment between shaft and housing. This reduces the impact of alignment errors commonly found in field installations.
2. Stable running performance under vibration
The dual-row structure distributes load more evenly, improving stability in equipment exposed to vibration such as pumps, conveyors, and agricultural machines.
3. Low friction and controlled temperature rise
Precision-ground raceways and controlled internal clearance help reduce friction loss, supporting more stable temperature behavior during continuous operation.
4. Suitable for continuous-duty applications
The bearing design supports long-running conditions in motors and industrial drives where downtime is costly and maintenance intervals are extended.
5. Consistent manufacturing process control
Production follows ISO 9001 and IATF 16949 quality management systems, covering material inspection, dimensional control, and final assembly verification.
Technical Manufacturing Capability
BMT Bearings produces 1300 Series Self-Aligning Ball Bearings through a standardized process that includes:
- Raw material spectral testing before production
- Heat treatment with controlled hardness targets
- CNC grinding of inner and outer raceways
- Automatic assembly with controlled preload/clearance
- 100% inspection of key dimensions before packing
Inspection items typically include:
- Bore diameter and outer diameter tolerance checks
- Radial internal clearance measurement
- Noise and vibration screening (random batch testing or full inspection depending on order level)
- Surface finish and hardness verification
Typical Applications
The 1300 Series Self-Aligning Ball Bearings are commonly used in:
- Electric motors (industrial and household types)
- Water pumps and irrigation systems
- Agricultural machinery (e.g., harvesters, processing equipment)
- Ventilation and cooling systems
- Light conveyor and transmission equipment
- Automotive auxiliary mechanisms
These applications often involve misalignment or structural deflection during operation, making self-aligning capability essential for stable performance.
What Customers Typically Care About
Misalignment during installation
→ The spherical outer ring compensates angular deviation, reducing shaft stress.
Bearing noise in motor applications
→ Precision grinding and controlled clearance help reduce abnormal vibration sources.
Short service life under continuous load
→ Heat-treated steel and optimized internal geometry improve fatigue resistance.
Unstable quality between batches
→ Standardized production lines and inspection procedures ensure repeatable dimensional control.
Quality Control System
Each production batch is managed under a traceable quality system, including:
- Incoming material inspection records
- In-process dimensional monitoring
- Final inspection report before shipment
- Batch traceability labeling for export orders
This allows industrial customers to verify consistency across repeated orders.
Supply & Customization Options
We support:
- OEM branding and packaging
- Custom clearance (C2, C3, or customer-defined requirements)
- Material and hardness adjustment for specific environments
- Bulk export packaging for distributors
Why BMT Bearings
BMT Bearings focuses on long-term industrial supply rather than single-time sales. Our production system is designed for consistent dimensional control, stable delivery schedules, and repeatable manufacturing quality for OEM and distributor-level cooperation.
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No.183,Longfeng,West of Zhangting industrial Zone,Yuyao,Ningbo,China
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