Multiple Disc Clutches, Brakes and Clutch Brakes
Hydraulic / Pneumatic Actuated
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Logan Multiple Disc Clutches and BrakesSimple, Compact, High Torque DesignLogan Fluid or Air actuated clutches, brakes, and clutch-brake combinations are used ina wide variety of Machine Tool, Industrial, Marine, Municipal, Mining and Off-Highway applications. Our attention to quality and service, along with the ability to modify stan-dard units to meet specific customer needs, has lead to the success and growth of Logan Clutch Corporation. The Standard Logan product line is described in this catalog. It consists of three series of clutches and brakes with design features that are beneficial to their installation, operation and maintenance. Each series has model sizes with friction discs ranging in diameter from 2.5 inches (64 mm) to 8 inches (203 mm). All models can be furnished with standard lug or gear toothed friction discs. Clutch ApplicationsWhen used as a clutch, the hub is keyed to the drive shaft. The drive cup is attached to a bearing mounted gear, sprocket or sheave, which can freewheel about the same shaft. The hub or the drive cup can be the driving or driven member. The above arrangement is used to transmit torque between two parallel shafts. When torque must be transmitted between in-line shafts, one half of a flexible coupling is used to connect the bearing mounted drive cup to the other shaft. Brake ApplicationsWhen S and P units are used as a brake, their hub is keyed to the shaft to be stopped. The drive cup is held stationary by the drives supporting frame. The R series allows either its hub or drive cup to be the stationary member. An external cylinder port is provided when the hub is held stationary. OperationPressurizing the cylinder with fluid or air forces the piston to clamp and lock the frictionand separator discs. Torque is transmitted through the interfaces between hub and separator disc splines, separator and friction discs, and friction disc tangs and drive cup slots. When pressure is removed, the release springs separate the separator discs and maintain a running clearance between separator and friction discs. LubricationR and S Series:Logan R and S Series Clutches and brakes are designed primarily for R and S Series: wet operation within gear boxes and transmissions. They can be partially submerged in an oil sump or an oil splash or spray can be directed on the outside diameter of the discpack. This wet operation aids in dissipating the thermal energy generated at the disc friction interfaces. S series units require lubrication of the cylinder and thrust bearings. Usually, the oil splash or spray directed at the disc pack provides sufficient lubrication. Lube ports are available for specific applications. P Series:P series clutch bearings are greased and sealed and do not require external lubrication. Torque ratings are based on dry operating conditions. Convenient to MaintainLogan Clutches and brakes do not require linkages, levers, or adjusting collars. At drivesystem service time, in-stock disc pack kits, seal kits, and bearing repair kits, along with factory installation data sheets make maintenance quick and easy. Factory reconditioning is also available. |
Standard Features Modified Standards for Specific Design Requirements Increased Torque and RPM Capability Geared Friction Disc and Drive Cup Interface Custom Drive Cups Forced Cooling and Thrust Bearing Lubrication Mounted for Use as a Power-Applied Brake
Logan Clutch Components
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Stationary Cylinder for Precise AlignmentThe actuating cylinder and piston in the S series design do not rotate. They are bearing supported on the mounting hub and are held stationary by the external connection to the inlet port. This bearing allows the separator discs and hub, and the shaft on which it mounts, to rotate about the cylinder and piston. A thrust bearing permits relative motion between the stationary piston and rotating separator discs. Because both bearings require lubrication, it is important to utilize lube ports provided and/or direct an oil spray or splash at bearing surfaces.
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Sealed Ball Bearings for Positive LubricationThe P series design is similar to the S series, which is designed for wet operation. The difference between the two models occurs in the bearings. P Series bearings are pre- lubricated and sealed and do not require external lubrication. Torque ratings are based on the P Series disc pack operating in dry conditions -thus requiring lower actuation pressure to achieve relatively high rates of torque.
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High Torque / Small EnvelopeThe R series design provides maximum torque within a small envelope. In the R Series design, the piston and actuating cylinder, which is integral with the mounting hub, rotate. Bearings are not required. The shaft on which the hub mounts is rifled and cross drilled to provide passage for the actuating media. A press fit or cap seals are necessary to prevent media pressure loss due to seepage past the hub and shaft interface. Although the R series design can withstand high rotational speeds, consideration must be given to disengaging and freewheeling speeds when the units are hydraulically actuated. Review the maximum disengaging speed for each standard model (see page 6).
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Logan Drive Cups are manufactured to perform in harsh conditions. Contact surfaces are heat treated to ensure long life. Standard cups are furnished with 1inch and 2 inch diameter pilot bores. All models can be furnished with standard lug or gear toothed configurations.
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Logan also manufactures and stocks a wide variety of both friction faced and high carbon-steel discs for wet or dry clutch and brake applications. Logan incorporates the latest technology in friction facing material.
Consider Logan when designing or improving upon your single or multiple disc clutch or brake applications. |
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Logan PTO Series Clutches are designed to mount between the power take-off of an engine, multi-station pump drive, hydraulic motor or pump. OEM and Aftermarket designers can take advantage of energy savings and component longevity by utilizing Logan PTOs to drive Auxiliary attachments only when required.
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Self-adjusting Disc Pack - Minimize Slippage Eliminates Mechanical Linkages, Hand Levers, Yokes Air or Fluid Actuated - (air is ideal for cold start applications) Fast Engagement - Quick Release Remote Actuation Modified Standards Available |