Solid 304 Stainless Steel Ball Bearings 20 25 30 35 40 45 50.8 75 76.2 85mm
Solid 304 Stainless Steel Ball Bearings 20 25 30 35 40 45 50.8 75 76.2 85mm
Solid 304 Stainless Steel Ball Bearings 20 25 30 35 40 45 50.8 75 76.2 85mm
Solid 304 Stainless Steel Ball Bearings 20 25 30 35 40 45 50.8 75 76.2 85mm
Solid 304 Stainless Steel Ball Bearings 20 25 30 35 40 45 50.8 75 76.2 85mm
Solid 304 Stainless Steel Ball Bearings 20 25 30 35 40 45 50.8 75 76.2 85mm
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Solid 304 Stainless Steel Ball Bearings 20 25 30 35 40 45 50.8 75 76.2 85mmSolid 304 Stainless Steel Ball Bearings 20 25 30 35 40 45 50.8 75 76.2 85mmSolid 304 Stainless Steel Ball Bearings 20 25 30 35 40 45 50.8 75 76.2 85mmSolid 304 Stainless Steel Ball Bearings 20 25 30 35 40 45 50.8 75 76.2 85mmSolid 304 Stainless Steel Ball Bearings 20 25 30 35 40 45 50.8 75 76.2 85mmSolid 304 Stainless Steel Ball Bearings 20 25 30 35 40 45 50.8 75 76.2 85mm

Solid 304 Stainless Steel Ball Bearings 20 25 30 35 40 45 50.8 75 76.2 85mm

HomeDIYer
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By HomeDIYer®

Price:
$17.54 USD
Stock:
In stock (500 units), ready to be shipped

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Description

304 Stainless Steel Ball Bearings — Precision-Ground Solid Balls for DIY & Industrial Use

When a loose, pitted, or undersized ball causes a bearing assembly to fail mid-project, the cost is more than just the part — it's downtime, rework, and frustration. DIYers, machinists, and maintenance professionals who need a reliable replacement or a precision component for a custom build require balls that hold tight tolerances and resist corrosion without constant upkeep.

These solid 304 stainless steel ball bearings are precision-ground from grade 304 austenitic stainless steel, offering a smooth, consistent surface finish suited to both static and dynamic load applications. Available in diameters ranging from 20 mm (approx. 0.79 in) to 100 mm (approx. 3.94 in), each ball is sold in packs of 1, 2, or 5 pieces depending on the selected size.

Typical use cases include replacement balls in pillow block and flanged bearing housings, valve seats in fluid control systems, and load-distributing elements in custom jigs, fixtures, and transfer tables. The 304 alloy's resistance to oxidation also makes these balls well-suited for damp workshop environments and light washdown applications where carbon steel would corrode.

⚙️ Compatibility: Suitable for standard bearing housings, valve assemblies, and custom mechanical fixtures accepting solid balls from 20 mm to 100 mm diameter. Verify bore diameter and tolerance class before ordering.

✅ Key Features of These 304 Stainless Steel Ball Bearings

  • 🔩Grade 304 Stainless Steel Construction — Austenitic 304 alloy provides solid corrosion resistance against moisture, mild acids, and oxidizing environments, extending service life compared to standard carbon steel balls.
  • 📏Wide Diameter Range: 20 mm – 100 mm — 24 size options from 20 mm (0.79 in) to 100 mm (3.94 in) cover the majority of standard bearing and valve seat applications without custom sourcing.
  • 🎯Precision-Ground Surface Finish — Smooth, consistent spherical surface reduces friction and wear in rotating or sliding contact applications, maintaining dimensional accuracy over repeated use cycles.
  • 📦Flexible Pack Quantities — Available in 1, 2, or 5-piece packs so you can order exactly what the job requires — no overstocking, no hunting for singles.
  • 💧Suitable for Damp & Washdown Environments — The 304 alloy's passive oxide layer resists surface rust in humid workshops, light outdoor enclosures, and low-concentration chemical exposure.
  • 🔄Versatile Application Fit — Used as replacement bearing elements, valve balls, transfer table rollers, and load-distribution components in jigs, fixtures, and custom mechanical assemblies.

📐 Technical Specifications — Stainless Steel Ball Bearings

Material 304 Austenitic Stainless Steel
Form Solid sphere (no hollow core)
Diameter Range 20 mm – 100 mm (0.79 in – 3.94 in)
Available Diameters 20, 25, 28, 30, 32, 35, 38.1, 40, 42, 45, 48, 50, 50.8, 55, 60, 63.5, 65, 70, 75, 76.2, 80, 85, 90, 100 mm
Surface Finish Precision-ground, smooth spherical
Packing Quantity See variant options (1 pc / 2 pcs / 5 pcs)
Weight per Ball See variant options
Tolerance Class See variant options
Applicable Standards Contact us to confirm

❓ Frequently Asked Questions

How do I choose the right diameter for my bearing housing?

Measure the bore diameter of your bearing housing or valve seat with a caliper. The ball diameter should match the bore specification exactly — even a 0.1 mm mismatch can cause excessive play or binding. Cross-reference your housing's datasheet or OEM part number to confirm the required ball size before ordering.

Are these balls solid or hollow?

These are fully solid 304 stainless steel balls with no hollow core. Solid construction provides uniform load distribution and prevents deformation under compressive loads, making them suitable for both static load-bearing and dynamic rolling applications.

Will 304 stainless steel rust or corrode?

Grade 304 stainless steel forms a passive chromium oxide layer that resists rust in most workshop and light industrial environments, including exposure to moisture, humidity, and mild cleaning agents. It is not fully immune to corrosion in high-chloride environments (such as saltwater immersion) or strong acids — for those conditions, 316 stainless steel is typically recommended.

Can these balls be used in food-grade or sanitary applications?

304 stainless steel is widely used in food processing equipment and meets general food-contact material standards in many jurisdictions. However, suitability for a specific regulated application depends on local compliance requirements. Contact us to confirm if you need documentation for a regulated food or pharmaceutical environment.

Are these compatible with standard pillow block or flanged bearing housings?

These solid balls are designed as replacement or custom-build components for bearing assemblies, valve seats, and similar housings that accept a solid ball element. Verify the required ball diameter and surface finish grade against your housing specification. They are not pre-assembled bearing units with inner/outer races.

Why does the pack quantity vary by diameter?

Larger diameter balls are significantly heavier and more material-intensive, so smaller pack quantities are offered at larger sizes to keep per-order weight and cost practical. Smaller diameters (20–25 mm) are available in 5-piece packs, mid-range sizes (28–40 mm) in 2-piece packs, and larger sizes (42 mm and above) in single-piece packs. Select the diameter and quantity combination that matches your project needs.

How should I store these balls to prevent surface damage?

Store in a dry location away from direct contact with carbon steel tools or surfaces that could cause galvanic corrosion or surface scratching. Keeping balls in their original packaging or a clean, dry container prevents surface contamination that could affect performance in precision applications.

🛒 Select your Diameter and Packing Qty above, then add to cart.

 

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