The FONKIN 35220 is a high-performance double-row tapered roller bearing, specifically engineered to bear heavy combined radial and axial loads.
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The FONKIN 35220 is a high-performance double-row tapered roller bearing, specifically engineered to bear heavy combined radial and axial loads.
1. Detailed Dimensional Parameters: Conforming to international and national bearing standards, the bearing has an inner diameter (d) of 100mm, outer diameter (D) of 180mm, and width (T) of 107mm. The minimum chamfer size (rₘᵢₙ) is 2.5mm, single weight is 10.7kg. Its tolerance grade is P0 (ISO 492), with inner/outer diameter tolerance of IT6 and width tolerance of IT7. The basic dynamic load rating is 345kN, basic static load rating is 480kN, reference speed (grease lubrication) is 2200r/min, and limiting speed (oil lubrication) is 3000r/min, suitable for heavy-duty, medium-speed working scenarios.
2. Specific Material Description: Inner ring, outer ring and tapered rollers are made of high-carbon chromium bearing steel (AISI 52100/GCr15), refined by vacuum degassing technology to reduce non-metallic inclusions. After precision heat treatment, it reaches a hardness of 61-65 HRC, featuring excellent wear resistance, high fatigue strength and stable dimensional accuracy under long-term cyclic loading. The retainer is made of pressed steel (SPCC), with good impact resistance and wear resistance, ensuring stable roller guidance and reducing friction during high-load operation.
3. Core Processing Technology: Key manufacturing processes follow FONKIN’s stringent quality standards: closed-die forging (ensures dense internal structure and continuous metal fibers), CNC turning (achieves Ra ≤ 0.3μm surface roughness), controlled atmosphere heat treatment (nitrogen-hydrogen atmosphere to avoid oxidation and decarburization), precision grinding and superfinishing (reduces raceway roughness to Ra ≤ 0.04μm). The double-row tapered raceways are precision machined to ensure optimal contact between rollers and raceways, enhancing load-bearing efficiency and operational stability.
4. Service Life: Under standard working conditions (1800r/min, radial load 120kN, proper lubrication and clean environment), the L₁₀ basic rated life (90% reliability) is 24,000 operating hours, calculated in accordance with ISO 281:2007 standard. Key influencing factors include lubrication quality, contamination level, installation accuracy and load magnitude; insufficient lubrication or excessive wear can reduce service life by 30-45%.
5. Application Scenarios and Industries: Widely used in heavy industrial sectors, including engineering machinery, mining, metallurgy, rolling mills and railway equipment. Typical applications include heavy-duty gearboxes, rolling mill equipment, crushers, conveyor systems and railway vehicle axles. It is suitable for these scenarios due to its double-row structure (high load-bearing capacity), tapered design (adaptability to combined loads), and robust material, adapting to heavy-duty, high-impact and dusty working conditions.
6. Basic Maintenance Requirements: Maintenance cycle is 2000 operating hours. Lubrication: Use lithium-based grease (NLGI 2) or extreme pressure gear oil (ISO VG 68), filling amount 15-25% of bearing free space; re-lubricate every 1500-2000 hours. Cleaning: Clean with clean kerosene; avoid corrosive cleaners. Regular inspection: Check for abnormal noise, temperature rise and grease leakage; replace lubricant if deteriorated, and inspect for roller or raceway wear if vibration increases.
7. Installation Precautions: Pre-installation: Keep area clean, remove burrs from shaft/housing, check fitting surface roughness (Ra ≤ 0.8μm) and dimensional accuracy. Installation: Apply thin oil film, press evenly on inner ring (no tapping), ensure coaxiality tolerance ≤ 0.02mm and tilt angle ≤ 1.5' to avoid poor contact. Fastening torque: 140-170N·m for bearing seat bolts. Post-installation: Rotate manually to check jamming; temperature ≤ 72℃ after 30 minutes. Safety: Wear protective gloves/goggles, use specialized lifting tools.
| BRAND | FONKIN/SKF/FAG/INA/NSK/NTN/TIMKEN/SNR/IKO/KOYO/ASAHI/FYH/THK/HIWIN/PMI |
| BEARINGS NO. | 35220 FONKIN |
| TYPE | Tapered Roller Bearings |
| Inner(d)mm | 100 |
| Outer(D)mm | 180 |
| Width(B)mm | 107 |
| WEIGHT/KG | 10.7 |
| EAN CODE |
+86-510-6831-3099
No.105, Huixin Road,Yuqi Industrial Park, Huishan District, hunqi Road, Yuqi Town, Wuxi, Jiangsu Province, P.R.CHINA
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