Description
Product Overview
The USA Sealing Acetal Ball is a 1/4 inch (0.25″) white plastic sphere made from standard grade acetal copolymer. With a Rockwell M90 hardness and a tensile strength of 9,100 psi, it delivers reliable load‑bearing capability while maintaining a low coefficient of friction (0.35). Its density of 0.051 lbs/cu in and minimal water absorption (0.0022) make it lightweight yet stable in moist conditions. The ball operates comfortably from -50°F to 180°F, covering most industrial temperature ranges.
![[Product front view showing all components]](https://www.ilvora.store/wp-content/uploads/2026/06/48472fab5091464b93a09e3d6fa73681.jpg)
Usage
Designed for industrial and scientific settings, this acetal ball is perfect for bearing assemblies, guide mechanisms, and low‑friction rollers. Its opaque white color aids visual inspection in assembly lines, and the material’s good water resistance suits applications in humid or wet environments. Engineers, machinists, and maintenance teams will find it valuable for prototypes, equipment repairs, and custom tooling.
Why Choose Us
USA Sealing is known for consistent quality control and precise molding processes. Each ball meets strict dimensional tolerances (6 × 4 × 0.3 in package) and undergoes rigorous testing for impact strength and friction performance. Our commitment to reliable supply ensures you receive the exact model (BULK-PB-AC-7) when you need it, backed by responsive customer support.
Key Features
- Low friction surface reduces wear in moving assemblies
- High tensile strength supports load‑bearing applications
- Excellent water resistance prevents swelling in humid conditions
- Wide temperature range (-50°F to 180°F) for versatile use
- Responsive after‑sales service and easy replacement parts
FAQ
What is the material of the ball?
The ball is made from standard grade acetal copolymer, offering a balance of strength and low friction.
Can the ball be used in wet environments?
Yes, its water absorption rating is good (0.0022), making it suitable for humid or occasional wet conditions.
What is the impact strength?
The impact strength is rated at 1.1 ft‑lb/in, which is considered poor for high‑impact applications but sufficient for typical low‑impact uses.
Is the ball compatible with standard bearing housings?
Its 1/4 inch diameter conforms to common bearing specifications, allowing easy integration.
How do I contact support for replacement parts?
Reach out to USA Sealing customer service via email or phone; we provide fast assistance and part numbers for quick ordering.








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