- Case Studies
Year after year, lost production hours are attributed to mechanical threading clutches that are over or under adjusted on your Acme-Gridley screw machine - forcing you to compromise on part quality and tap life.
Now, you can achieve state-of-the-art tapping repeatability, reliability and quality with Logan Hi-Capacity Air Threading™ Clutches. Engagement and disengagement are so smooth and positive - Tap depth remains consistent over millions of parts.
Also, the load on your tap is uniform, prolonging the life of the tap. Fewer tool changes are necessary, shaving valuable hours from a big job. Logan also provides up to 200% more torque for heavy-duty pipe thread tapping.
Logan Hi-Capacity Air Threading™ Clutches are simple to install and available for almost every Acme ever manufactured.
Most Logan Air Threading™ Clutches utilize existing clutch drive cups, (clutch gears), spacers and shafts.
Cut-away view of a Logan Hi-Capacity Air Threading™ Clutch for a1-1/4 RA-6 Acme-Gridley. Utilizes existing drive cups, (clutch gears) and shaft. Fits within existing old-style mechanical clutch envelope and transmits 85% more torque.
Pressurizing the cylinder forces the piston to clamp and lock the friction and steel separator discs. When pressure is removed, release springs separate the separator discs and maintain a running clearance between separator and friction discs. The amount of pressure controls the amount of torque.
Change of speed in threading applications is accomplished through a limit switch and a solenoid-activated, directional control valve. At the prescribed depth, the limit switch is tripped by the threading slide shaft, signaling the threading clutch to change speeds. Low speed for tapping - Fast speed to back the tap out. (Left-hand threading applications require the inverse sequence).
Since Logan Clutches operate at relatively high speeds, a steady metered flow of lubrication is required over the bearing and disc pack surfaces.
Each Logan electrical pneumatic start-up kit is designed to save you time and money during Installation. Kits are furnished with detailed schematics to simplify Installation.
In addition to our line of air/fluid actuated Clutches and Brakes, Logan manufactures and stocks a wide variety of friction-faced and high-carbon steel clutch discs for use in a variety of applications. Call our factory for details.
Available as original equipment on these and other popular screw machines.
1" BRA - 6
1-5/8" BRB - 8