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304 Stainless Steel Deep Groove Ball Bearing | 21x137x9mm

Expert Overview

Engineered for extreme operational demands, this 304 stainless steel deep groove ball bearing offers exceptional corrosion resistance and longevity, ensuring reliable performance in challenging industrial settings.

StandardASTM A106
Material304 Stainless Steel
FinishZinc Plated
GradeN/A
Inside Diameter21mm
Outside Diameter137mm
Width9mm

Detailed Engineering Specifications

Purpose-built for heavy-duty applications, this 304 stainless steel deep groove ball bearing features an internal diameter of 21mm, an external diameter of 137mm, and a width of 9mm. The inherent properties of 304 stainless steel provide superior resistance to rust, corrosion, and chemical attack, making it ideal for use in wet, humid, or chemically aggressive environments. Its robust construction and precise tolerances ensure smooth, low-friction operation under significant radial and axial loads, critical for applications in food processing, marine equipment, chemical pumps, and outdoor machinery.

🧊 Download 3D CAD Model (.STEP)

Verified Global OEM Partners

This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.

SKFEst. 1907
Sweden🇸🇪
"World leader in rolling bearings."
Market Rank
🏆 #1 Global Bearing Manufacturer
Industry Approvals
🚀 Formula 1 & Airbus Approved
Warranty & Support
🛡️ 24/7 Global Support
Green Manufacturing
🌱 Net Zero by 2030
Certified:ISO 14001, OHSAS 18001
TimkenEst. 1899
USA🇺🇸
"Engineered bearings and power transmission."
Market Rank
🏆 Premium Heavy Industry Leader
Industry Approvals
🚀 NASA & Military Approved
Warranty & Support
🛡️ Extended Wear Warranty
Green Manufacturing
🌱 Sustainable Steel
Certified:ISO 9001, AS9100
NSKEst. 1916
Japan🇯🇵
"Precision machinery and automotive parts."
Market Rank
🏆 Top 3 Global Bearings
Industry Approvals
🚀 Toyota & Honda OEM
Warranty & Support
🛡️ 10-Year Defect Free Guarantee
Green Manufacturing
🌱 100% Renewable Energy
Certified:ISO/TS 16949

Certifications & Compliance

RoHS Compliant:Yes
REACH Compliant:Yes
Material Traceability:Available on Request
DFARS Compliant:Yes

Installation Procedure

1. Clean bearing bore and shaft thoroughly. 2. Carefully press bearing onto shaft, ensuring alignment and avoiding excessive force. 3. Mount bearing assembly into housing, verifying proper seating and clearance.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardASTM A106

Mechanical Properties

Tensile Strength75,000 psi (515 MPa)
Yield Strength30,000 psi (205 MPa)
Elongation in 2 in.40% min
HardnessRockwell B95 max

Chemical Composition

Carbon (C)0.08% max
Chromium (Cr)18.0 - 20.0%
Nickel (Ni)8.0 - 10.5%
Manganese (Mn)2.00% max

Temperature & Environment Rating

Min Operating Temp
-320°F (-195°C)
Max Continuous Temp
1400°F (760°C)
Thermal Expansion
Typical for Material Class

Weight Reference Table

Size / TypeEst. Weight (lbs/100)Shipping Weight (kg)
StandardVaries by dimensionContact Sales

Corrosion Resistance Guide

EnvironmentRating
Indoor / DryExcellent
Outdoor / ExposedExcellent
Marine / SaltwaterGood
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Forcing bearing installation with improper tools.Utilize a bearing press or induction heater for controlled and even installation, preventing damage to raceways and seals.
Contamination during handling and installation.Maintain a clean environment and keep bearings in their original packaging until immediately before installation. Avoid exposure to dust, dirt, and moisture.

Common Applications

  • Marine Equipment
  • Food and Beverage Processing
  • Chemical Pumps and Mixers
  • Outdoor Industrial Machinery

⚠️ Engineering Warnings

  • Ensure proper lubrication is applied according to manufacturer specifications for optimal performance and lifespan.
  • Verify operating temperature limits for 304 stainless steel bearings to prevent premature failure.

Alternative Products to Consider

Premium Power Transmission equivalentHigher corrosion resistance (316 SS)
Economy Power Transmission optionLower cost for non-critical indoor applications

Frequently Asked Questions

Q: What is the Deep Groove Ball Bearing made from?

A: This Deep Groove Ball Bearing is manufactured from 304 Stainless Steel.

Q: What are the main applications?

A: Marine Equipment, Food and Beverage Processing, Chemical Pumps and Mixers, Outdoor Industrial Machinery.

Technical Schematic

BALL BEARING CROSS-SECTIONISO 15 — Deep Groove Ball BearingBOREOD = 52mmd = 25mmWidth: 9mmDynamic Load: 7,870 lbsInstall with press fit — never strike inner/outer race directly

Torque Specifications

⚡ UNIT CONVERTER

Conversion factor: 1 ft-lb ≈ 1.356 Nm

Verified Compatibility

StatusMating ComponentStandardTorque SpecEngineering Notes
No verified compatibility data found for this component.