Air Set Industrial Friction Brakes Operation Industrial friction brake engages with air pressure, release springs disengage friction brake when air is exhausted Torque is linear in response to air pressure applied Mounting Flange bolts to machine frame or other fixture, shaft inserts into bore and is fixed with set screws and customer supplied key Industrial friction brake can also be mounted mid-shaft Friction brakes are designed for horizontal mounting. If vertical mounting is required, consult engineering for options Applications Air set industrial friction brakes are suitable for Stopping, Holding and Cycling applications Maximum RPM varies by model. Please consult the detail sheets (below). Consult engineering if the intended application exceeds the listed maximum RPM. Design Features Air set friction brakes are bored to suit up to the maximum shown (US & Metric) for easy installation. Drilled & slotted flange to accommodate various installation arrangements Available with either high or low* coefficient friction linings for same price

Friction Brake Repair Kits & Parts Click here or view PDF detail sheets below for more information.

Product No. Friction Lining Coefficient Torque @ 80 PSI (Lb-In) Maximum Bore with Standard Keyway (Inches / Millimeters) Length (Inches) Outside Diameter (Inches) Mounting Bolt Circle (Inches) Detail Sheet Request 3D CAD Model B3F2R-STH High 267 1.000 / 24 2.60 4.25 3.875 B3F2R-STL Low* 178 1.000 / 24 2.60 4.25 3.875 B4F2R-STH High 760 1.250 / 31 3.13 5.38 4.938 B4F2R-STL Low* 507 1.250 / 31 3.13 5.38 4.938 B5F2R-STH High 1584 1.438 / 38 3.34 6.75 6.250 B5F2R-STL Low* 1056 1.438 / 38 3.34 6.75 6.250 B6F2G-STH High 3118 2.000 / 52 4.48 8.56 7.937 B6F2G-STL Low* 2079 2.000 / 52 4.48 8.56 7.937 B8F2K-STH High 4788 2.375 / 66 4.71 11.31 10.687 B8F2K-STL Low* 3192 2.375 / 66 4.71 11.31 10.687 BAF2K-STH High 9673 2.750 / 72 5.23 13.63 12.812 BAF2K-STL Low* 6449 2.750 / 72 5.23 13.63 12.812

*Low coefficient lining models are offered for applications where a small amount of slip is required or a narrower torque range is necessary. For continuous slip or tension control applications, a SensiFlex® brake should be used.

Mach III industrial friction brake models are solidly constructed and feature hang-up resistant drives to provide reliable braking and holding. Mach III air set industrial friction brakes can be adapted to accommodate customer needs. See our Custom Design Solutions page for more information. Mach III encourages contact with our engineering department before purchasing an industrial friction brake for use in a new or retrofit application.