The Wichita Air-Tube Disc Brakes combines all the best features of the disc type clutch with all the advantages of direct air engagement. The simplest and most trouble-free method of applying air pressure is through direct axial pressure application by compressed air in a special composition full-circle tube.
        
                    Unit of Measure
                    
               
        
            Specifications
                                                                                Assembly Number | 
                                                                        N/A 7-021-300-100-0 | 
                                                                                Dynamic Torque Rating (80 psi/5.5 bar) | 
                                                                        N/A 209662 lb·in23265 Nm | 
                                                                                Dynamic Torque Rating (100 psi/7 bar) | 
                                                                        N/A 262078 lb·in29610 Nm | 
                                                                                Maximum Bore Size | 
                                                                        N/A 6.00 in152 mm | 
                                                                                Maximum Air Pressure | 
                                                                        N/A 130 psi9 bar | 
                                                                                Maximum RPM (Standard Airtube) | 
                                                                        N/A 1090 rpm | 
                                                                                Maximum RPM (High Speed Airtube) | 
                                                                        N/A 1650 rpm | 
                                                                                Total Brake (Weight) | 
                                                                        N/A 723 lb328 kg | 
                                                                                Weight (Hub & Center Plate) | 
                                                                        N/A 312 lb141.5 kg | 
                                                                                WR2/J=mr2 (Hub & Center Plate) | 
                                                                        N/A 122 lb·ft²5.14 kg·m² | 
                                                                                Dimension A | 
                                                                        N/A 27.00 in685.8 mm | 
                                                                                Bolt Hole Diameter B | 
                                                                        N/A 25.500 in647.70 mm | 
                                                                                Dimension C | 
                                                                        N/A 21.378/21.375 in543.00/542.93 mm | 
                                                                                Dimension D | 
                                                                        N/A 24.88 in632 mm | 
                                                                                Dimension F | 
                                                                        N/A 7.13 in181.1 mm | 
                                                                                Dimension G | 
                                                                        N/A 0.75 in19.1 mm | 
                                                                                Dimension H | 
                                                                        N/A 11.75 in298.5 mm | 
                                                                                Dimension J | 
                                                                        N/A 0.31 in7.9 mm | 
                                                                                Number of Mounting Holes (L) | 
                                                                        N/A 12 | 
                                                                                Dimension L | 
                                                                        N/A 21/32 in16.7 mm | 
                                                                                Dimension M | 
                                                                        N/A 14.50 in368.3 mm | 
                                                                                Dimension N | 
                                                                        N/A 9.00 in228.6 mm | 
                                                                                Dimension Q | 
                                                                        N/A 0.75 in19.1 mm | 
                                                                                Dimension R (Number - Size) | 
                                                                        N/A 3 - 1/2 NPT | 
                                                                                Dimension T | 
                                                                        N/A 9.25 in | 
                                                                                Minimum U | 
                                                                        N/A 2.00 in50.8 mm | 
                                                                                Maximum U | 
                                                                        N/A 6.00 in152.4 mm | 
                                                                                Manufacturer | 
                                                                        N/A Wichita Clutch | 
                                                                                Actuation | 
                                                                        N/A Air Applied | 
