USA Sealing BULK-PS-ACB-1049 Black Acetal Plastic Bar, 1/2″ Height, 1/2″ Width, 12″ Length

Description

Product Overview

The USA Sealing Acetal Bar (model BULK-PS-ACB-1049) is engineered for demanding industrial environments where dimensional stability and mechanical strength are paramount. Crafted from a standard‑grade acetal copolymer, this black opaque bar delivers a consistent appearance and reliable performance across a wide range of applications, from rapid prototyping to precision tooling. Its composition provides a balance of rigidity and machinability, allowing manufacturers to achieve tight tolerances without sacrificing ease of processing.

Acetal, also known as polyoxymethylene (POM), is celebrated for its low moisture absorption, high tensile strength, and excellent wear resistance. The material’s coefficient of friction of 0.35 contributes to a slippery surface that reduces friction in moving assemblies, while the Rockwell M90 hardness ensures the bar resists surface deformation under load. These intrinsic properties make the bar suitable for components that experience repetitive motion or require smooth sliding interfaces.

The bar’s dimensions are precisely controlled: a height of 1/2 inch, width of 1/2 inch, and length of 12 inches, with tolerances of -0.028″ to +0.012″ for thickness, -0.05″ to +0.05″ for width, and -1″ to +1″ for length. This level of dimensional accuracy supports CNC machining, extrusion, and custom fabrication processes, enabling engineers to integrate the bar directly into assemblies without extensive post‑processing.

Mechanical performance is highlighted by a tensile strength of 9,100 psi, which classifies the bar as having good tensile strength for its class. Impact strength is measured at 1.1 ft‑lb/in, a rating considered poor for high‑impact scenarios but acceptable for static or low‑impact applications. The bar’s low water absorption of 0.0022 % ensures that dimensional changes due to humidity are minimal, preserving tight tolerances even in variable environmental conditions.

Temperature resilience spans from –50°F to 180°F, allowing the bar to function reliably in both cold storage environments and heated processing zones. This broad operating range, combined with UL 94 HB flame‑retardant certification, provides confidence for use in safety‑critical applications where fire resistance and thermal stability are required.

Typical applications include gear housings, bearing sleeves, valve components, and custom fixtures where a combination of strength, low friction, and dimensional stability is essential. The bar’s opaque black coloration also offers aesthetic benefits for visible components, reducing glare and providing a professional appearance in finished products.

USA Sealing Inc. adheres to rigorous quality control protocols throughout the manufacturing process. Each batch undergoes statistical process control, dimensional verification, and material property testing to ensure compliance with the specified tolerances and performance criteria. This commitment to consistency reduces the risk of variability that can affect downstream manufacturing steps.

The product meets UL 94 HB standards for flame resistance, confirming its suitability for applications where fire safety is a concern. Additionally, the bar complies with industry‑wide specifications for acetal plastics, offering compatibility with existing design libraries and engineering standards.

Environmental considerations are addressed through the material’s recyclability and low VOC emissions during machining. The acetal copolymer can be reprocessed into new components, supporting sustainable manufacturing practices and reducing waste in high‑volume production settings.

In practical usage, the bar excels in CNC milling, turning, and drilling operations. Its low chip formation and smooth surface finish minimize tool wear, extending the life of cutting tools and reducing operational costs. Engineers often select this bar for prototype builds where rapid iteration and reliable material performance are critical.

Target audiences include mechanical engineers, product designers, and procurement specialists in sectors such as automotive, aerospace, medical device manufacturing, and general industrial equipment. The bar’s combination of strength, stability, and ease of machining makes it a versatile choice for both custom part development and standardized component production.

USA Sealing provides comprehensive after‑sales support, including technical assistance for machining parameters, material compatibility inquiries, and guidance on regulatory compliance. Customers benefit from a responsive service team that can address questions promptly, ensuring seamless integration of the bar into existing production workflows.

Usage

The bar is ideally suited for environments where precision and durability are required, such as in the fabrication of gear housings, bearing sleeves, and valve components. Its low friction surface reduces wear in moving assemblies, making it a preferred material for sliding mechanisms and low‑speed drive systems.

In automotive and aerospace applications, the bar’s temperature tolerance allows it to withstand the thermal cycles encountered during engine testing, cabin heating, and exterior exposure. Engineers can rely on its dimensional stability to maintain tight clearances in critical safety components.

For medical device manufacturers, the material’s biocompatibility and low water absorption support the creation of sterile, non‑porous components that meet stringent hygiene standards. The bar can be machined into surgical instrument handles, housings for diagnostic equipment, and other precision parts where cleanliness and reliability are paramount.

Why Choose Us

USA Sealing’s reputation for delivering high‑quality raw materials is reinforced by this acetal bar’s consistent performance across all tested batches. The company’s investment in state‑of‑the‑art extrusion and cutting equipment ensures that each bar meets the exacting dimensional tolerances required by modern manufacturing processes.

Our commitment to compliance means the bar adheres to UL 94 HB flame‑retardant standards and industry‑accepted specifications for acetal plastics. This reduces the burden on customers to verify third‑party certifications, streamlining the procurement and validation phases of product development.

By offering a product that balances mechanical strength, low friction, and temperature resilience, USA Sealing enables engineers to design lighter, more efficient components without compromising on durability. The bar’s recyclable nature also aligns with corporate sustainability goals, providing an environmentally responsible material choice.

Key Features

• Precise 1/2″ x 1/2″ x 12″ dimensions with tight tolerances for reliable CNC machining
• High tensile strength of 9,100 psi ensures robust load‑bearing capability
• Low water absorption (0.0022 %) maintains dimensional stability in humid environments
• Wide operating temperature range from –50°F to 180°F for versatile application use
• Responsive technical support and material expertise for seamless integration

FAQ

What machining parameters are recommended for this acetal bar?

We recommend using carbide tools with moderate cutting speeds (150–250 SFM) and a low feed rate to achieve a smooth surface finish while minimizing tool wear. Coolant can be used, but is not required for most operations.

Is the material suitable for food‑contact applications?

The bar meets basic food‑grade requirements due to its low moisture absorption and inert nature, but we advise confirming compliance with specific regulatory standards such as FDA 21 CFR Part 177 for your intended use.

Can the bar be recycled after use?

Yes, the acetal copolymer is recyclable. It can be re‑processed into new plastic components, supporting sustainable manufacturing practices and reducing waste.

Does the product comply with any fire safety standards?

The bar is certified to UL 94 HB flame‑retardant standards, making it suitable for applications where basic fire resistance is required.

What is the lead time for ordering this product?

Standard inventory is typically shipped within 3–5 business days. For larger quantities or custom packaging, lead times may vary and can be discussed with our sales team.