HK3520 INA

Needle Roller and Cage Assembly HK3520 INA

The INA HK3520 is a high-precision, open-type drawn cup needle roller bearing engineered for compact radial load support in limited installation spaces. Renowned for its thin-wall structure, high load capacity, and reliable performance, this bearing is a top choice for automotive, industrial machinery, and power transmission applications.

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The INA HK3520 is a high-precision, open-type drawn cup needle roller bearing engineered for compact radial load support in limited installation spaces. Renowned for its thin-wall structure, high load capacity, and reliable performance, this bearing is a top choice for automotive, industrial machinery, and power transmission applications.
1. Dimensional Parameters (ISO Standard)
- Bore Diameter (Fw): 35 mm (tolerance: 0 / -0.025 mm)
- Outer Diameter (D): 42 mm (tolerance: 0 / -0.030 mm)
- Width (C): 20 mm (tolerance: 0 / -0.30 mm)
- Chamfer (r min): 1 mm
- Tolerance Grade: ISO Normal (PN)
- Weight: 0.044 kg
- Dynamic Radial Load Capacity (C): 23.8 kN
- Static Radial Load Capacity (C0): 46 kN
- Max Speed (Grease): 4,500 RPM; (Oil): 7,500 RPM
2. Material Composition & Performance
- Outer Ring: 100Cr6 alloy steel (HRC 60–64) – high hardness, wear resistance, and dimensional stability.
- Needle Rollers: 100Cr7 alloy steel (HRC 61–65) – superior contact fatigue strength and impact resistance.
- Cage: Sheet steel – lightweight, high rigidity, and precise roller guidance.
- Temperature Range: -30°C to +140°C.
3. Core Manufacturing Process
1. Forging & Blanking: Precision blanking for thin-wall outer cups; closed-die forging for roller blanks to ensure structural uniformity.
2. Turning & Heat Treatment: CNC turning for dimensional accuracy; vacuum quenching + tempering for consistent hardness and residual stress reduction.
3. Grinding & Superfinishing: ID/OD grinding (Ra ≤ 0.4 μm); roller superfinishing (Ra ≤ 0.1 μm) for low friction and quiet operation.
4. Assembly & Inspection: Clean-room assembly; 100% dimensional and load testing to meet INA’s quality standards.
4. Service Life & Influencing Factors
- L10 Rating Life: Calculated per ISO 281: L10h = (C/P)^3 × 16,667/n hours. Under standard conditions (P ≤ 0.5C, 3,000 RPM, grease lubrication), L10 life reaches 20,000+ hours.
- Key Factors: Load magnitude, speed, lubrication quality, contamination, and installation alignment.
5. Application Scenarios & Industries
The INA HK3520 excels in space-constrained, high-radial-load applications:
- Automotive: Transmissions, differential gears, clutch assemblies.
- Industrial Machinery: Pumps, compressors, conveyor systems.
- Power Tools: Electric motors, drills, angle grinders.
- Agricultural & Construction Equipment: Gearboxes, hydraulic components.
- Why It Fits: Compact cross-section (7 mm wall thickness), high load-to-size ratio, and reliable performance in harsh environments.
6. Maintenance Requirements
- Lubrication: Use NLGI 2 lithium grease (e.g., INA Grease L271). Fill 30–40% of cavity volume; re-grease every 500 hours (normal duty). For oil lubrication, use ISO VG 32–68 oil.
- Cleanliness: Keep housing/shaft surfaces free of debris; avoid contamination during assembly.
- Inspection: Check for noise, vibration, or temperature rise (>70°C) periodically. Replace if wear or damage is detected.
7. Installation Guidelines
- Pre-Installation: Verify shaft/housing tolerances (shaft: h6, housing: H7). Clean and deburr mounting surfaces; use ISO 8.8-grade fasteners.
- Installation: Press-fit with a sleeve tool (avoid hammering); heat outer ring to 80–100°C for interference fits. Ensure coaxiality ≤ 0.05 mm.
- Torque & Testing: Tighten fasteners to 15–20 Nm. Run a 30-minute test; monitor temperature (<70°C) and vibration (<2.8 mm/s).
- Safety: Wear gloves; use clean tools; avoid direct impact on the cage or rollers.
8. SEO-Optimized Description (Unique & Keyword-Rich)

BRAND	FONKIN/SKF/FAG/INA/NSK/NTN/TIMKEN/SNR/IKO/KOYO/ASAHI/FYH/THK/HIWIN/PMI/TORRNGTON
BEARINGS NO.	HK3520 INA
TYPE	Needle Roller and Cage Assembly
Inner(d)mm	35
Outer(D)mm	42
Width(B)mm	20
WEIGHT/KG	0.044
EAN CODE	4012802 414547

Tel

+86-510-6831-3099

E-mail

fonkin-industries@188.com

Address

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

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