DC3809A-INA

Clutch Bearing DC3809A-INA

DC3809A INA integrated sprag one-way needle bearing: Inner bore d=38 mm, outer diameter D=48 mm, overall width C=22 mm, fillet radius r=0.5 mm. Precision tolerance grade P0 for automotive transmission matching; bore tolerance 0/-0.009 mm, outer ring tolerance 0/-0.011 mm. Built-in high-strength sprag locking elements plus 18 needle rollers with 2.5 mm diameter, unidirectional torque transmission and radial load support integrated into one compact unit.

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Technical Datasheet: DC3809A INA One-Way Clutch Needle Bearing

1. Dimensional Specifications (ISO 3061 & INA OEM Standard)
DC3809A INA integrated sprag one-way needle bearing: Inner bore d=38 mm, outer diameter D=48 mm, overall width C=22 mm, fillet radius r=0.5 mm. Precision tolerance grade P0 for automotive transmission matching; bore tolerance 0/-0.009 mm, outer ring tolerance 0/-0.011 mm. Built-in high-strength sprag locking elements plus 18 needle rollers with 2.5 mm diameter, unidirectional torque transmission and radial load support integrated into one compact unit.
2. Material Composition & Mechanical Performance
Outer drawn cup: DC05 deep-drawing carbon steel, high ductility and uniform wall thickness. Needle rollers & sprags: GCr15 high-carbon chromium bearing steel, HRC 61–65, superior contact fatigue resistance and wear resistance under frequent locking impact loads. Retainer: Phosphated low-carbon steel cage, stable component separation and anti-rust property. GCr15 sprags deliver reliable instant locking without slip under dynamic torque, outperforming ordinary steel clutches in cyclic start-stop conditions.
3. Core Manufacturing Processes
1. Deep drawing stamping: Thin-wall outer cup forming with consistent roundness control.
2. Precision CNC turning for mating surfaces to narrow dimensional deviations.
3. Vacuum quenching + low-temperature tempering: Uniform hardness, minimal thermal deformation for sprag locking surfaces.
4. Raceway fine grinding, surface roughness Ra ≤0.02 μm to reduce friction during overrunning.
5. Roller & sprag superfinishing eliminates micro burrs, lowering wear during frequent engagement. All procedures follow INA original factory technical standards and ISO 3290.
4. Service Life Performance
Dynamic radial load rating Cr=29.4 kN, static torque rating T=185 N·m, calculated per ISO 281:2019. Under standard working conditions: radial load ≤0.3Cr, operating temperature -30℃~125℃, continuous proper lubrication; nominal L10 service life ≥29,500 working hours. Primary life-limiting factors: excessive shock torque, lubricant degradation, particle contamination and coaxial offset.
5. Industrial Application Fields
INA DC3809A one-way clutch needle bearing integrates overrunning, indexing and radial bearing functions, mainly applied to automotive starter assemblies, small CVT auxiliary gearboxes, textile weaving machinery, packaging conveyor overrunning mechanisms, miniature construction hydraulic motors and agricultural machinery transmission modules. Its all-in-one compact structure saves assembly space and simplifies unidirectional rotation control design.
6. Routine Maintenance Standards
Lubrication cycle: Every 120 working hours for high-frequency start-stop scenarios; 320 hours for steady low-speed operation. Recommended lubricant: EP3 anti-impact automotive lithium grease, filling 25%–35% of internal cavity. Monthly air blowing cleaning to remove metal abrasives; inspect sprag surface abrasion, roller peeling and grease aging. Persistent abnormal noise or slipping during locking requires immediate bearing replacement.
7. Installation Guidelines
Pre-installation: Thoroughly clean shaft and housing bore, remove burrs and residual metal chips. Installation: Uniform press fit on outer cup, avoid direct impact on sprag and needle components. Coaxiality deviation controlled below 0.015 mm; auxiliary lock nut tightening torque 16–20 N·m. Post-installation test: Manually rotate to verify smooth overrunning and firm unidirectional locking. Wear oil-resistant gloves during assembly to prevent grease pollution and surface scratches.
BRAND INA/FONKIN/SKF/FAG/NSK/NTN/TIMKEN/ZKL/PEP/KOYO/TSUBAKI
BEARINGS NO. DC3809A-INA
TYPE Cylindrical Roller Bearing Single Row
Inner(d)mm 25
Outer(D)mm 71
Width(B)mm 16
WEIGHT/KG 0.085
EAN CODE 4012802 240801
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+86-510-6831-3099

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fonkin-industries@188.com

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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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Next Cylindrical Roller Bearing F-554185.01 INA

BRAND	INA/FONKIN/SKF/FAG/NSK/NTN/TIMKEN/ZKL/PEP/KOYO/TSUBAKI
BEARINGS NO.	DC3809A-INA
TYPE	Cylindrical Roller Bearing Single Row
Inner(d)mm	25
Outer(D)mm	71
Width(B)mm	16
WEIGHT/KG	0.085
EAN CODE	4012802 240801

Clutch Bearing DC3809A-INA

Technical Datasheet: DC3809A INA One-Way Clutch Needle Bearing

1. Dimensional Specifications (ISO 3061 & INA OEM Standard)

2. Material Composition & Mechanical Performance

3. Core Manufacturing Processes

4. Service Life Performance

5. Industrial Application Fields

6. Routine Maintenance Standards

7. Installation Guidelines

Tel

E-mail

Address

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