Description
Product Overview
These 2-pack replacement carbon brushes are specifically designed for Ametek Lamb Motors used in Metro Air Force AF3, B3, and MB3 models. With a precise 3/8″ width and durable carbon construction, they ensure optimal motor performance and longevity. Compatible with part numbers 3339211 and 33392-11, they are ideal for vacuum and dust collector applications where consistent motor function is critical. Manufactured by LEFITPA, these brushes are built to meet industry standards for reliability and fit.
Usage
These carbon brushes are used in commercial and residential vacuum and dust collector systems powered by Ametek Lamb Motors. They are commonly installed in Metro Air Force AF3, B3, and MB3 models to maintain smooth motor operation and prevent overheating or electrical failure. Ideal for technicians, DIYers, and facility managers who require reliable, easy-to-install replacement parts. They are also suitable for repair shops and maintenance teams needing consistent, high-quality components.

Why Choose Us
LEFITPA offers premium-quality carbon brushes with a 18-month warranty and 30-day money-back guarantee, ensuring customer satisfaction. Each brush is precision-engineered for a perfect fit, reducing the risk of motor damage or performance issues. Our products are designed for durability and long-term use, minimizing the need for frequent replacements. We prioritize customer support, offering prompt assistance for any questions or concerns. Our manufacturing process ensures consistent quality and reliability, making us a trusted choice for professionals and homeowners alike.
Key Features
- High-quality carbon material ensures smooth motor operation and long-lasting performance.
- Exact 3/8″ width and precise fit for Ametek Lamb Motors in Metro AF3, B3, and MB3 models.
- Durable construction withstands daily use and high-temperature environments.
- 18-month warranty and 30-day money-back guarantee for added peace of mind.
- Customer support available for installation guidance or technical questions.
FAQ
Are these brushes compatible with Metro Air Force AF3, B3, and MB3 models?
Yes, these carbon brushes are specifically designed to fit Ametek Lamb Motors used in Metro Air Force AF3, B3, and MB3 models. They are compatible with part numbers 3339211 and 33392-11.
What is the width of these brushes?
The brushes have a precise 3/8″ width, ensuring a perfect fit for the motor’s brush holder.
Do they come with a warranty?
Yes, each product comes with an 18-month warranty and a 30-day money-back guarantee for customer satisfaction.
Can I use these brushes in other vacuum models?
These brushes are specifically designed for Ametek Lamb Motors in Metro AF3, B3, and MB3 models. For other models, please verify compatibility with the manufacturer’s specifications.
How do I install these brushes?
Installation is straightforward: remove the old brush, insert the new one into the brush holder, and ensure it is securely seated. For detailed instructions, refer to the motor’s manual or contact customer support.





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