Description
The Model LKT clutch or brake contains identical features to the Model LK units with the exception being the cylinder piston arrangement. Whereas the Model LK unit has a full cylinder covering its entire outboard end, the Model LKT has a doughnut type cylinder which allows it to be mounted in a through-shaft arrangement as an air set brake. The design incorporates an extremely low driven inertia and the quickest response with minimal air consumption of any clutch or brake available. It is particularly suited to those applications requiring frequent cycling and long life such as is found in metal forming or indexing applications.
The components are arranged simply and efficiently LKT Clutch
- Drive ring with integral drive studs.
- Lined friction discs with internal drive splines.
- Driving center plate with integral separating springs.
- Driving pressure plate with integral separating springs.
- Actuating piston and seals.
- Actuating cylinder with integral air inlet spider.
- Externally splined inner hub (not shown).
Whether the application is in metal forming, oilfield machinery, cranes, shovels, paper machinery or marine equipment, the LKT low inertia design is an ideal choice for through shaft mounting arrangements as an air set brake or end of shaft mounting as a clutch.
The Model LKT clutch or brake contains identical features to the Model LK units with the exception being the cylinder-piston arrangement. Whereas the Model LK unit has a full cylinder covering its entire outboard end, the Model LKT has a doughnut type cylinder which allows it to be mounted in a through-shaft arrangement as an air set brake.
The design incorporates extremely low driven inertia and the quickest response with minimal air consumption of any clutch or brake available. It is particularly suited to those applications requiring frequent cycling and long life such as is found in metal forming or indexing applications.
LKM AIR SET MARINE CLUTCH DEVELOPMENT HISTORY
The Model LKM marine clutch incorporates many of the features found in our Model LK clutch series with some notable exceptions. Cyclic applications, where the LK style finds its most frequent use, contain duty cycles which bear little resemblance to marine main propulsion service. Marine clutches are required to make infrequent, yet in some instances, severe engagements from a heat standpoint. The clutches are also called upon to run for extended periods in the engaged position (ahead clutches) and for extended
periods in the disengaged position (reverse clutches).
The Model LK clutches were rugged enough to handle the load duty cycle from a torque and heat standpoint but required modification to their separation systems in order to be suitable for marine service. Industrial Clutch Products was the first to recognize the importance of positive plate separation for marine service and all clutches installed in marine service contained this feature. Disc clutches for marine service without positive plate separation have experienced a sad approval rating from users.
This is particularly true in forward/reverse service where, strangely enough, the unloaded reverse clutch gives the greatest degree of trouble. Because of the gearing arrangement, the outer members of this clutch rotate in one direction while the inner member rotates in the other.
This gives rise to the term “twice relative rotation.” The cant of the gear to which these clutches are mounted in order to align with the propeller shaft as well as vessel motion due to wave action causes the clutch plates, if not positively separated, to kiss and wear or burn-out. Exactly the same result would occur if one were going down the road in an automobile at a high rate of speed with the brake pedal lightly depressed.
To eliminate this, Industrial Clutch Products designed and patented positive plate separation which has accrued over 30 years of field experience in marine main propulsion service. The separating system is self-adjusting for wear and no adjustments are ever required by the user during regular use or during routine maintenance. No plate contact can occur with this unique positive plate separation system and the many advantages of the disc clutch can be fully realized for marine service.
The incorporation of positive plate separation, a bearing cavity for the outboard quill bearing, and modifications made to increase the load carrying capacity on a continual basis changed the time-proven LK design into the Model LKM marine clutch.
LKM Marine Clutch Application Information
The selection chart on the previous page is suitable for forward/reverse main propulsion service at 125 PSI actuation. For controllable pitch propellers, dredge pumps, winches, and fire pumps use the following service factors
Product Features
- Full cylinder covering its entire outboard end
- Doughnut type cylinder which allows it to be mounted in a through-shaft arrangement as an air set brake
- Mounted end-shaft as a clutch
Hydraulic Clutches and Brakes
- Long component life, low driven inertia, faster response speed
- Model CBA Clutch Brake, Model CBH Clutch Brake, Model HBA/HBS Brake, Model HC Clutch
Air Clutch
- Smooth start-up, variety of high cycle, high speed, low inertia designs available
- Combination Clutch/Brake, Model LK Clutch, Model LKM Clutch, Model LKT Clutch
Air Brake
- Air cooled for light duty, fan cooled for medium duty, torque transmitted is proportional to air pressure and unaffected by centrifugal force
- Combination Clutch/Brake Unit, Model LK Brake, Model LKB Brake, Model LKT Clutch or Brake
Water Cooled Brakes
- Kopper Kool Spring Set Brake or Clutch, AquaMakks Water Cooled Clutches and Brakes, wcbAM Water Cooled Brakes
- Available as KK/SS (spring-applied/air released “passive brake” for emergency engagement OR KK/SS/Dual Acting- air applied active control plus spring applied passive holding/stopping).
- Water Cooled brake with cooling water contained within water jackets
- Copper plates used to dissipate heat and give longer control/life.
- Dry running friction surfaces
Fluid Couplings
- High temperature Viton oil seals, welded construction to eliminate leaks on size 7.0, 9.4, and 12.4
- Available for electric motors from 1/2 HP to 2500 HP that operate at speeds as low as 500 RPM and as high as 3600 RPM. During start-up the fluid coupling will reduce the current draw on your electric motor by 33%
Wichita Clutch Literature
Literature
https://www.indclutch.com/-/media/Files/Literature/line-cards/p-1723-7.ashx
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