Stop fighting machining marks and ear-piercing squeals. The AMMCO 6920 Ventilated Rotor Silencer Band is engineered for professional automotive technicians who need a flawless, mirror-smooth finish every time they turn a vented brake rotor.

Featuring a heavy-duty natural rubber construction and strategically placed integrated weights, this silencer band doesn't just wrap around the rotor—it actively absorbs the high-frequency vibrations that cause chatter and poor surface finishes. Whether you are running a classic Ammco 4000 or a modern heavy-duty machine, this is the essential shop consumable to keep your brake lathe producing pristine work. Length: Approx. 31" – 32". Diameter (Looped) 9".

Key Features & Benefits

Advanced Vibration Dampening:
- Chatter Elimination: Instantly neutralizes harmonic vibrations during the machining process, eliminating tool chatter and surface irregularities for a perfect cut.
- Noise Reduction: Drastically reduces the high-pitched squealing commonly associated with turning vented rotors, saving your hearing in a busy shop.

Heavy-Duty Construction: Made from premium, oil-resistant natural rubber with a textured material finish that maintains elasticity and gripping power even in demanding, high-heat shop environments.

Integrated Weight System: Built-in external weights provide balanced, uniform tension across the rotor's cooling fins to maximize vibration absorption.

Tool-Free Installation: Wraps securely around the outside of the rotor in seconds with a simple, secure clip-closure—no specialized tools required.

Compatibility (The "Fits" List)

Designed as an OEM-style replacement, the 6920 is a universal shop standard compatible with a massive range of brake lathes:

Ammco: 3000, 3800, 3850, 4000, 4100, 6000, and 7000 series.

Hunter: BL20, BL21, BL23, BL30, BL31, BL33.

FMC / John Bean: 601, 701, 702, 7600, 7700 (Directly replaces part # 90984, 920022).

Universal Applications: Fits Accuturn, Atlas, Kwikway (108-1062-00), Ranger, RELS (11488), and Van Norman (111485).