Logan Clutch


Logan Clutch Corporation designs and manufacturers multiple disc fluid and air-actuated clutches for machine tool, industrial, marine, oil field, rail, and off-highway applications. In addition, we manufacture microprocessor controls and real time data collection software for machine tools.

Logan Hi-Capacity Air Threading Clutches

Logan Hi-Capacity Air Threading Clutches

Increase Productivity, Thread Quality, and Tap Life

Hi-Capacity Air Threading
on a 1-1/4 RA-6 Acme-Gridley shown aboveLogan Hi-Capacity Air Threading Clutches are simple to install and available for almost every Acme ever manufactured. Make the switch from mechanical to Logan!

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.

Increase Productivity And Quality

  • Self-Adjusting Disc Pack – No Slippage.
  • Extremely Accurate – Uniform Thread Depth Over Millions of Parts.
  • Large Cylinder – Piston Area For Maximum Torque.
  • Up To 200% More Torque Than Mechanical Clutches.

Simple to Install

  • Most Logan Air Threading Clutches utilize existing clutch drive cups, (clutch gears), spacers and shafts.


Logan Hi-Capacity Air Threading Clutches

Logan Clutches: How They Work

Pressurizing the cylinder forces the piston to clamp and lock the friction and steel separator discs. When pressure is removed, release springs separate the friction and separator discs and maintain a running clearance between separator and friction discs. The amount of pressure controls the amount of torque.

Speed Changes

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. Lube Ports are standard on majority of Threading Clutches to provide direct lubrication to clutch bearings.

Logan Clutch and Brake Discs

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.

Replacement Friction and Steel Clutch Discs for :

  • Twin Disc
  • Dana / Formsprag / T.B. Woods
  • Rockford
  • Carlyle Johnson and more
Applications Include:
  • Mechanical Threading Clutches
  • Spindle Stopping Clutches
  • Mechanical High Speed and Feed Clutches

Logan Hi-Lo Retrokits

Logan Hi-Lo Retrokits for your early and late-model Acme-Gridleys increase your machines daily and weekly output from 10-20% – leaving you room for additional capacity, productivity and profitability. Positive, fast-acting Logan Clutch engagement enables your Acme to change speeds much faster, and provides a more consistent and accurate cycle time than conventional mechanical clutches.

  • Simplifies Machine Set-up
  • Set-up personnel can position tools closer to the work piece, and reduce dwell time due to repeatable high and low-speed clutch engagement.
  • Guaranteed Cycle
  • Time Repeatability

We replace your 1940s vintage mechanically actuated high-speed and feed clutches, roll clutch, band brake, linkages, pins and lever arms with air-actuated, self-adjusting Logan clutches. By making the switch from mechanical to Logan, you’ll increase your machines, daily and weekly output significantly, through consistent and accurate speed changes and decreased maintenance.

Even better – Our quick-stop power-applied brake prevents coasting and provides accurate braking for bar loader positioning during feed-out.

Hi-Lo Retrokit Features:
  • Reduces idle time between speed changes.
  • Replaces mechanical clutches, roll clutch, band brake and linkages with fast-acting air-actuated Logan Clutches.
  • Positive, crisp Logan Clutch engagement guarantees cycle time repeatability.
  • Simplifies clutch maintenance -No disc pack adjustment or slippage.
  • Quick-stop, power-applied brake -Prevents machine coasting.
  • Low-speed clutch design reduces idle time. The machine operates more consistently.



Hi-Lo Retrokits
Air Threading Clutches
Spindle Carrier Indexing Kits
Spindle Stopping Clutches
Brown and Sharpe Spindle Drive Clutches
Pick-Off Drives
Air Pick-Off Attachments
CS 2001 XT Microprocessor Controls
LoganNet Software


Please see www.loganclutch.com for more info on Logan Clutch Corporation

Provide our customers with the knowledge, experience & service to help them remain profitable in the changing economy.
30419 Beck Road
Wixom, Michigan 48393
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tel (248) 624-4545
toll free (800) 727-2763
Fax (248) 624-8722
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