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304 Stainless Steel Deep Groove Ball Bearing - 39x39x21mm

Expert Overview

Engineered for precision and durability, this 304 stainless steel deep groove ball bearing offers exceptional performance in corrosive environments. Its robust construction ensures reliable power transmission under demanding conditions.

StandardDIN 933
Material304 Stainless Steel
FinishBlack Oxide
GradeN/A
Inside Diameter39mm
Outside Diameter39mm
Width21mm

Detailed Engineering Specifications

Trusted by engineers across multiple sectors, this deep groove ball bearing boasts an inside diameter of 39mm, an outside diameter of 39mm, and a width of 21mm. Constructed from premium 304 stainless steel, it provides superior corrosion resistance, making it ideal for applications exposed to moisture, chemicals, or saltwater. This material also offers excellent mechanical strength and durability, ensuring extended service life and consistent performance in high-load and moderate-speed power transmission systems. Its design minimizes friction and heat generation, contributing to overall system efficiency and reliability.

🧊 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. Ensure the bearing bore and shaft are clean and free from debris. 2. Gently press the bearing onto the shaft, ensuring it is seated squarely. 3. Secure the bearing in its housing, using appropriate retaining rings or press fits as per design specifications.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardDIN 933

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 the bearing onto the shaft with excessive force.Utilize a bearing press or a properly sized sleeve and hammer for controlled, even pressure to avoid damage to the bearing races or balls.
Improper lubrication or using the wrong type of lubricant.Consult the bearing manufacturer's recommendations for the appropriate lubricant type and quantity for the specific operating conditions.

Common Applications

  • Marine equipment and offshore machinery
  • Food processing and pharmaceutical machinery
  • Chemical processing equipment

⚠️ Engineering Warnings

  • Do not expose to extreme temperatures beyond the material's specified operating range.
  • Ensure proper sealing to prevent contamination from external elements, especially in harsh environments.

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 and offshore machinery, Food processing and pharmaceutical machinery, Chemical processing equipment.

Technical Schematic

BALL BEARING CROSS-SECTIONISO 15 — Deep Groove Ball BearingBOREOD = 52mmd = 25mmWidth: 21mmDynamic 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.