THRUST BALL BEARING SS51209/P5HWS1 FONKIN

Model SS51209/P5HWS1 single direction thrust ball bearing: Bore d=45 mm, Outer diameter D=73 mm, Overall width T=20 mm, Fillet radius r=1.0 mm. Tolerance grade P5 (ISO 281), bore tolerance: 0/-0.012 mm, OD tolerance: 0/-0.015 mm, axial width tolerance ±0.02 mm. Ball pitch circle diameter Dpw=59 mm, steel ball diameter Dw=7.144 mm, 12 rolling balls configured for uniform axial load distribution.

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Technical Datasheet: SS51209/P5HWS1 FONKIN Thrust Ball Bearing

1. Dimensional Specifications (ISO 104 Standard)
Model SS51209/P5HWS1 single direction thrust ball bearing: Bore d=45 mm, Outer diameter D=73 mm, Overall width T=20 mm, Fillet radius r=1.0 mm. Tolerance grade P5 (ISO 281), bore tolerance: 0/-0.012 mm, OD tolerance: 0/-0.015 mm, axial width tolerance ±0.02 mm. Ball pitch circle diameter Dpw=59 mm, steel ball diameter Dw=7.144 mm, 12 rolling balls configured for uniform axial load distribution.
2. Material Composition & Mechanical Performance
Inner/outer rings: SUS440C martensitic stainless steel, HRC 58–62 hardness, superior anti-rust property, excellent wear resistance and dimensional stability under humid corrosive environment. Rolling elements: SUS440C stainless steel balls with mirror polishing. Retainer: cold stamped SUS304 stainless steel cage, low friction, acid & alkali resistance, no galvanic corrosion contact with raceways. SUS440C delivers 3x higher corrosion resistance than standard GCr15 bearing steel for marine, chemical and wet workshop operations.
3. Core Manufacturing Processes
1. Forging: Closed-die hot forging to eliminate internal metal porosity, optimize grain flow.
2. Turning: CNC precision hard turning for near-net shape blank forming.
3. Heat treatment: Vacuum quenching + low-temperature tempering, minimal deformation, consistent hardness.
4. Precision grinding: Double-sided raceway grinding, surface roughness Ra ≤0.02 μm.
5. Superfinishing: Oscillating superfinishing process to remove grinding texture, reduce friction coefficient and noise level. All processes comply with ISO 3290 bearing manufacturing standards.
4. Service Life Performance
Basic dynamic axial load rating Ca=48.2 kN, static load rating C0a=112 kN, calculated per ISO 281:2019 standard. Under standard working conditions (axial load ≤0.3Ca, operating temperature -20~120℃, proper lubrication), nominal rated life L10 ≥ 28,000 working hours. Key life-limiting factors: overload shock load, insufficient lubrication, particle contamination, misalignment and corrosive media erosion.
5. Industrial Application Fields
FONKIN SS51209/P5HWS1 precision thrust bearing mainly bears unidirectional axial loads, ideal for vertical spindle machine tools, food processing machinery, marine auxiliary equipment, medical automation devices, hydraulic valve components and light-duty new energy wind auxiliary assemblies. P5 high precision tolerance ensures stable axial positioning; full stainless steel structure adapts to high humidity, water splash and weak corrosive working environments unavailable for carbon steel bearings.
6. Routine Maintenance Standards
Lubrication cycle: Grease lubrication every 200 operating hours; oil bath lubrication every 800 hours. Recommended media: stainless steel bearing food-grade lithium grease / anti-corrosion ISO VG68 hydraulic oil, filling volume accounts for 30%–40% of bearing internal cavity. Monthly disassembly cleaning with alcohol-based rust remover, inspect raceway pitting, ball surface scratch and cage deformation. Abnormal noise, temperature rise over 35℃ above ambient or axial play jump requires immediate bearing replacement.
7. Installation Guidelines
Pre-installation: Clean shaft and housing seat, remove burrs, measure matching dimensional clearance. Installation: Cold press fit via inner ring only, avoid direct impact on outer ring. Strict axial coaxiality tolerance ≤0.01 mm, mounting nut tightening torque: 32–36 N·m. Post-installation inspection: Rotate shaft manually to check smooth rotation without jamming, monitor initial running temperature for 30 mins. Wear anti-slip gloves during assembly to prevent fingerprint rust on stainless steel components.
BRAND FONKIN/SKF/FAG/INA/NSK/NTN/TIMKEN/SNR/IKO/KOYO/ASAHI/FYH/THK/HIWIN/PMI
BEARINGS NO. SS51209/P5HWS1 FONKIN
TYPE Thrust Roller Bearings
Inner(d)mm 45
Outer(D)mm 73
Width(B)mm 20
WEIGHT/KG 0.32
EAN CODE
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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BRAND	FONKIN/SKF/FAG/INA/NSK/NTN/TIMKEN/SNR/IKO/KOYO/ASAHI/FYH/THK/HIWIN/PMI
BEARINGS NO.	SS51209/P5HWS1 FONKIN
TYPE	Thrust Roller Bearings
Inner(d)mm	45
Outer(D)mm	73
Width(B)mm	20
WEIGHT/KG	0.32
EAN CODE

THRUST BALL BEARING SS51209/P5HWS1 FONKIN

Technical Datasheet: SS51209/P5HWS1 FONKIN Thrust Ball Bearing

1. Dimensional Specifications (ISO 104 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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