Needle Roller and Cage Assembly NK30X42X20MM FONKIN

FONKIN NK30X42X20 is a precision machined‑ring needle roller bearing engineered for high radial load capacity, compact installation, and stable operation in confined spaces. Compliant with ISO 1206 and GB/T 309, this bearing delivers consistent performance for industrial machinery, automation, and powertrain systems, optimized for space‑constrained high‑load mechanical assemblies.

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FONKIN NK30X42X20 is a precision machined‑ring needle roller bearing engineered for high radial load capacity, compact installation, and stable operation in confined spaces. Compliant with ISO 1206 and GB/T 309, this bearing delivers consistent performance for industrial machinery, automation, and powertrain systems, optimized for space‑constrained high‑load mechanical assemblies.
Key Dimensions (ISO Standard)
Bore (d): 30 mm; Outer Diameter (D): 42 mm; Width (C): 20 mm; Chamfer (r min): 1 mm; Tolerance Class: P0 (ABEC 1); Dynamic radial load (Cr): 28.5 kN; Static radial load (Cor): 57.2 kN; Limiting speed (grease): 6,000 rpm; Weight: 0.16 kg.
Material Specifications
Outer ring and needle rollers: GCr15 (100Cr6/AISI 52100) bearing steel, hardness 60–64 HRC, high wear resistance and rolling fatigue strength. Cage: low‑carbon steel stamping, precision guidance, low friction, stable running. All components feature oxide anti‑corrosion finish for enhanced durability.
Core Manufacturing Process
Precision forging refines grain structure for mechanical integrity. CNC turning ensures dimensional consistency. Hardening and tempering achieve target hardness and toughness. Profile grinding and superfinishing produce raceway roughness Ra ≤ 0.2 μm to reduce friction and extend life. Automated assembly and 100% dimensional and clearance inspection guarantee compliance.
Service Life
Under ISO 281 standard conditions (40% load, 3,000 rpm, proper lubrication), rated life ≥ 7,000 hours. Key factors: lubricant cleanliness, alignment, contamination control, operating temperature, and load stability.
Applications & Industries
Suitable for gearboxes, pumps, compressors, automation lines, machine tools, and automotive transmissions. Ideal for machine tool, automotive, automation, textile, and packaging machinery due to high load density, small radial envelope, and reliable anti‑misalignment performance.
Maintenance
Lubrication: NLGI 2 lithium‑complex grease, fill 30–40% of free volume; relubricate every 500–700 hours. Keep surfaces clean and sealed. Inspect vibration, temperature, and noise monthly; replace upon overheating, abnormal sound, or excessive clearance.
Installation
Clean shaft and housing; check dimensions and hardness. Press outer ring evenly with a hydraulic tool; avoid impact. Shaft hardness ≥ 58 HRC, roughness Ra ≤ 0.8 μm. Alignment TIR ≤ 0.02 mm. After installation, rotate manually to confirm smooth running; test run for 1 hour and monitor temperature.FONKIN NK30X42X20 stands as a reliable needle roller bearing for compact high‑load machinery, balancing precision, durability, and cost efficiency for demanding industrial environments.

BRAND	FONKIN/SKF/FAG/INA/NSK/NTN/TIMKEN/SNR/IKO/KOYO/ASAHI/FYH/THK/HIWIN/PMI/TORRNGTON
BEARINGS NO.	NK30X42X20MM FONKIN
TYPE	Needle Roller and Cage Assembly
Inner(d)mm	30
Outer(D)mm	42
Width(B)mm	20
WEIGHT/KG	0.07
EAN CODE

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No.105, Huixin Road,Yuqi Industrial Park, Huishan District, hunqi Road, Yuqi Town, Wuxi, Jiangsu Province, P.R.CHINA

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