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The world's largest disc brakes

For a complete list of Seal Kits (for everything we make), click here. The list is sorted by model number of the products. "Fluid Applied" means that air or specific hydraulic fluid can be used to make the brake clamp onto the disc. We have a wall-mountable version for many of our disc brakes. Call us if you want something you don't see here. We have the world's largest disc brakes, and are a common supplier for many industries.

  • The Disc Brake brochure(pdf)

  • Oil Rig brochure(pdf)
  • 3/4" x 2" Series Heavy Duty Brake Disc

    These discs are designed to fit out 5019 brake calipers, (fluid or spring applied). They are manufactured in ductile iron. These discs are designed for medium duty applications, because of their internal ventilated design.

    11/4" x 21/2" Series Heavy Duty Brake Disc

    This disc series was especially designed to go with our model 5020 brake calipers, again to fit both spring and fluid applied versions. Because of the cooling fin design of these discs they can be placed into a heavy-duty energy category. The versatility of these discs is almost unlimited. These discs are usually cast in ductile iron and are also available in various other materials to suit customer specifications.

    2" x 4" Series Heavy Duty Disc

    These discs were designed to fit our calipers 5021 through 5024 and also model 5027. This disc series is of the ventilated type, and can be classified because of their fin design as a heavy duty disc series.

    The table on reverse will indicate basic application characteristics for these discs. It is, however, recommended to contact Kobelt for severe applications to ensure that the proper disc caliper combination is selected.

    4" Series Discs

    for medium to high energy input. The patented fin design offers the ultimate in heat transfer and air flow. This disc will accomplish tasks not possible with ordinary ventilated discs.

    These discs are 4" thick, and are available in two different rubbing face widths. The rubbing face gives you more contact area with the brake shoe. Which, in turn, gives greater braking power.

    Disc diameters range between 30" and up, depending on the rubbing face widths. The specifications page will show the respective disc diameters.

    5019-A Fluid Applied Brake Caliper

    This caliper was especially designed for medium and light duty applications, and is used in almost every industry. Because of its compact and rugged design, it can be fitted into very small spaces, and will do a superb job for years.

    The usual Kobelt high quality engineering is all incorporated in this small brake. The caliper is equipped with balancing links to ensure even lining wear. Construction is all die-cast bronze and stainless steel. The 5019 is available in both foot mount and side mount configurations. When ordering, please specify your requirements.

    Important: Use only hydraulic fluid or air to apply this brake. Standard seals are NOT compatible with brake fluid.

     

    5019-S Spring Applied Brake Caliper

    This spring applied brake caliper is basically the same as the air applied configuration, but uses a different actuator, which requires fluid pressure to release the brake. The fluid pressure is absolutely proportional to the brake force. Increasing the pressure will decrease the brake torque, and decreasing the pressure will increase the brake torque.

    All 5019 brake caliper models can be used in either hydraulic or pneumatic applications, since its "O" ring and piston construction will not be damaged by hydraulic fluid. The spring applied actuator is available with many spring combinations, including adjustable springs, for various brake torques.

    The standard brake lining supplied by Kobelt is asbestos free, and was engineered to provide a coefficient of friction of approximately 0.45 to 0.55. The lining remains fairly stable up to 7500°F (400°C).

    The brake shoe bearings are detachable from the) brake shoe itself. This design allows for the installation of shims between the bearing and the brake shoes. Installing shims between these two items will reduce the clearance between the brake shoes. The brake caliper for this reason can be adapted to various sizes of thickness. Maximum disc thickness however, is 3/4". The 5019 is available foot mount or side mount.

    Important: Use only hydraulic fluid or air to apply this brake. Standard seals are NOT compatible with brake fluid.

     

    5020-A Fluid Applied Brake Caliper

    The 5020 is a scaled-up brake caliper from the model 5019. However, it has a much higher clamping force, and therefore fits into the medium to heavy-duty application range. The shoes are detachable from the shoe bearings, and shims can be installed between the brake shoe and bearing to adapt to various disc thicknesses. The fluid applied actuator is of the diaphragm type. A maximum pressure of 100 psi (6.9 bar)

    can be applied to this actuator assembly. The brake force is directly proportional to the fluid pressure in the actuator. Two pipe connections are provided on the actuator. These pipe ports are common internally, and therefore in most cases only one input connection is sufficient for the normal application. Because of its all bronze and stainless steel construction, you can expect many years of trouble-free srvice from this unit.

    Kobelt has developed a whole new series of brake discs to go with this caliper because of its high popularity. The discs start out at 12 inches in diameter, and are available in 3 inch increments up to 30 inches. These discs are all ventilated, and serve all segments of industry.

    Important: Use only hydraulic fluid or air to apply this brake. Standard seals are NOT compatible with brake fluid.
    Not sure if it will fit? Get the 3D Drawing!

    To use these 3D drawings you must have Austodesk® Inventor™ or equivalent installed.

    Please note that Inventor™, Inventor™ View, DWF™ Viewer and AutoDesk® are the registered property of Autodesk Inc.® Please read their terms of service carefully as we take no responsibility and accept no liability for their software or other products.

    5020-S Spring Applied Brake Caliper

    The model 5020-S brake caliper is the same basic design as model 5019, but is a much more powerful unit with a larger shoe area. These calipers are designed for stopping and energy absorbing applications.

    A special brake disc series (12-30 inches diameter), with superb ventilation and energy capabilities was designed to go with the 5020 brake caliper, providing virtually unlimited applications in all industries for stopping and braking. The application force is absolutely proportional to the actuator force. Consequently varying the control pressure at the actuator will allow smooth and positive response.

    All Kobelt brakes are equipped with patented balancing links which provide equal brake lining wear on both shoes and also accross the shoes itself.

    5021-A Fluid Applied Brake Caliper

    The model 5021 brake caliper is very versatile because of its large shoe area and considerable clamping force. It is the main reason that it is used in virtually all industries where continuous breaking and stopping is required.

    The patented balancing links ensure equal brake lining wear for both shoes and across the shoe itself.

    Shims can be installed between the brake shoe and bearing to reduce the clearance between the brake lining. This permits the caliper to be used with various disc thicknesses.

    The maximum disc thickness is two inches.

    The actuator is equipped with two fluid supply ports. These ports are connected internally and in most cases, only one port will be connected to the pressure source. Varying the application pressure to the actuator causes an absolutely proportional change in the brake torque. It is for this reason that very sensitive braking control can be obtained. Maximum fluid supply is 100 PSI (6.9 bar )

    Standard brake discs are available from 18 inches in diameter up to 50 inches in diameter.

    5021-S Spring Applied Brake Caliper

    The purpose of a spring applied caliper is to provide a braking device that will apply upon failure of fluid pressure. When the fluid pressure is removed from the spring applied actuator the springs will apply the brake. An option with a manual release screw is available for releasing the break in the absence of fluid pressure. To achieve various clamping forces, several different springs are available.

    The actuators are all made of bronze and stainless steel hardware, together with carbon steel springs. Upon special request, stainless steel springs are available.

    The fluid pressure in the actuator should not exceed 250 PSI.

    5022-A Fluid Applied Brake Caliper

    This caliper is derived from our model 5021, where in fact two brakes are combined into one. This, of course, doubles the clamping force over the model 5021, and also increases the shoe area.

    The stacking of basically two 5021 calipers makes the 5022 a very compact caliper, and lends itself ideally to installations in limited spaces. Most parts for the 5022 are directly interchangeable with our model 5021.

    The actuators are equipped with two ports each. However, being common internally, only one port is needed for connection to the source of control in most applications. The maximum supply pressure to the brake caliper is 100 psi (6.9 bar). The shoe bearings are detachable from the brake shoe, and shims can be installed between these two items to reduce the clearance between the brake linings. The push rod clevises on the air actuator also have an adjustment which can be used to compensate for brake lining wear. This will also avoid excessive use of compressed air during brake application.

    Kobelt has developed a whole series of brake discs to fit our calipers. This disc series offers heavy duty options and lends itself extremely well to continuous energy input, as well as severe stopping applications.

    5022-S Spring Applied Brake Caliper

    Spring applied calipers are used in applications where the spring keeps the brake applied and fluid pressure releases the brake. These brakes lend themselves extremely well for long term parking brakes. It is not possible to store fluid pressure for a long period. However, spring tension can be maintained almost indefinitely.

    The actuators are very responsive to control pressure, and the brakes can be infinitely controlled. The slightest change in fluid pressure will cause a proportional change in brake force.

    The balancing links provided on all Kobelt brake calipers keep the spring applied actuators in the mid position and ensure equal brake lining wear on both shoes. If the balancing links are removed it will allow the brake actuator to float and compensate for a disc which is attached to a rotating element that is also floating.

    5023-A Fluid Applied Brake Caliper

    This brake caliper was designed especially for high torque stopping applications. It is ideally suited for emergency stops and propeller shaft installations. It will take our standard 2'' x 4'' disc series. This brake caliper is available in both air and spring applied versions.

    The actuators are equipped with two fluid supply ports. These ports are common internally, and in most cases only one port is needed for connection to the source of control. Varying the control pressure to the actuator causes an absolutely proportional change in the brake torque. It is for this reason that very sensitive braking control can be obtained. Maximum fluid supply is 100 PSI (6.9 bar).

    Kobelt has developed a whole series of brake discs to fit our calipers. These are available from 18 inches up to 50 inches in diameter

    5024-A Fluid Applied Brake Caliper

    The model 5024 is a very compact and high torque brake caliper. All the components on this caliper are shared with the Model 5027 except for the lever and shoe arrangement.

    This caliper lends itself ideally to many industrial and marine applications. Kobelt's latest design and manufacturing innovations are incorporated in this caliper, thus years of trouble free service can be expected.

    The diaphragm actuator is extremely responsive to varying fluid pressure and precise control can be exercised over the braking application. Maximum supply pressure to the actuator should not exceed 100 psi (6.9 bar).

    The actuator clevises can be adjusted to compensate for lining wear. The clearance between disc and brake shoe can therefore be maintained at at the optimum. In cycling applications, a tremendous amount of compressed air can be saved by the shorter stroke of the actuator piston.

    5024-S Spring Applied Brake Caliper

    The model 5024 brake caliper is a very compact and high torque brake caliper. It is basically the same design as Model 5027 but only employs one actuator. All parts are interchangeable with Model 5027 except for the lever and brake shoe.

    The spring applied actuator provides very accurate control over the brake torque. The more pressure is accumulated in the actuator, the lower the torque. At zero pressure, maximum torque is obtained.

    It is important to keep the clearance between the disc and brake shoes at an absolute minimum in order to maintain maximum torque. Minimum clearance also means fast response. The actuator clevises can be adjusted to compensate for lining wear. In cycling applications a tremendous amount of compressed air can be saved by a shorter stroke of the actuator piston.

    Our standard 2 x 4 disc series can be used with this caliper for optimum energy absorption.

    5025-A Fluid Applied Brake Caliper

    The 5025 Brake Caliper is designed for high energy input applications with medium torque requirements. It is designed to fit the 4 x 7 disc series which is 4” thick and has a 7” wide rubbing face.
    This disc offers excellent thermal capabilities and is ideally suited for marine and industrial applications that require high energy input for extended periods such as tensioning brakes for winches, small draw works, anchor handling equipment, etc. Because of its large brake lining area, the caliper offers many hours of operation before lining replacement is needed.

    The diaphragm actuator is extremely responsive to varying fluid pressure and precise control can be exercised over the braking application. Maximum supply pressure to the actuator should not exceed 100 psi (6.9 bar).

    The actuator clevises can be adjusted to compensate for lining wear. The clearance between disc and brake shoe can therefore be maintained at an absolute minimum. In cycling applications the shorter stroke of the actuator can vastly increase compressed air efficiency.

    Model 5026-A Fluid Applied Brake Caliper

    The 5026 Brake Caliper is designed for high energy input applications with medium torque requirements.

    It is designed to fit the
    4 X 7 disc series which is 4" thick and has a 7" wide rubbing face. This disc offers excellent thermo capabilities and is ideally suited for marine and industrial applications requiring high energy input at extended periods such as tensioning brakes for winches, small drawworks, anchor handling equipment, etc. Because of its large brake lining area, the caliper offers many hours of operation before lining replacement is required.

    The diaphragm actuator is extremely responsive to varying fluid pressure and precise control can be exercised over the braking application. Maximum supply pressure to the actuator should not exceed 100 psi (6.9 bar).

    The actuator clevises can be adjusted to compensate for lining wear. The clearance between disc and brake shoe can therefore be maintained at an absolute minimum. In cycling applications, tremendous amount of compressed air can be saved by a shorter stroke of the actuator piston.

    Model 5026-CM (Air/spring applied Brake)

    This caliper is operated by an automotive brake actuator. The brake actuator, which is used on medium and heavy duty trucks, has two functions. The upper housing has a spring which is forcing the actuator rod downward, pushing the wedge against the rollers and applying the brake. Air pressure is required to overcome the spring to put the brake into a released position. If there is no air pressure going to the actuator, the upper brake portion applies the brake providing emergency braking.

    The lower portion of the actuator is a diaphragm that also pushes the rod downward and applies the brake proportionately. A very light return spring pushes the wedge upward to release the brake. This allows for the brake to be used in two different versions. The upper spring can only provide up to 60% of brake force. In order to modulate the brake, the air pressure can be varied in the diaphragm portion. Since there is no piston in this actuator assembly, there is practically no hysteresis, as far as the actuator is concerned. This makes it extremely sensitive to varying air pressures.

    The wedge mechanism consists of a wedge and rollers that force the levers apart to apply pressure to the brake disc and give a very accurate control over the brake torque.

    Accessories Available:

    Standard Shim Kit
    5026-3500 Shim Kit
    5026-3000 Shim Kit
    5026-2500 Shim Kit
    5026-3000/2500 Shim Kit
    * Quantity May Vary
    ** Refer to Product Sheet

     

    5027-A Fluid Applied Brake Caliper

    The 5027 Brake Caliper is the flag ship of the Kobelt die - cast brake caliper series. It combines all the latest technology in design and manufacture. Like all the foregoing calipers, it has patented features such as balancing links, adjustment shims to fit between the shoe and the shoe bearing and patented actuators. Again, its compact design makes it a very powerful brake caliper for its size. This brake caliper shares all its components parts, except for shoe and lever, with our Model 5024. As before, the air applied actuators have two supply ports per actuator. In most cases only one of these ports is needed to be connected to the control line

    The diaphragm actuator is virtually friction free and is therefore extremely quick in response. In fact, even a 1/10 psi change in air pressure will make a noticeable difference to the braking torque. The maximum supply pressure to the caliper should not exceed 100 psi (6.9 bar). Our standard 2 x 4 series brake disc from 30 to 50 inches range can be used with this caliper..

    5027-S Spring Applied Brake Caliper

    The spring applied Model 5027 brake caliper is equipped with an actuator requiring fluid pressure to release and internal springs to apply the brake. The more pressure that is accumulated in the actuator, the lower the torque; and the less pressure, the higher the torque.

    The actuator itself is extremely responsive and will give infinite control over brake torque. Adjustments are provided at the actuator to compensate for lining wear. The smaller the clearance between the brake shoe and disc, the higher the maximum torque. In applications where constant drag is required, the large shoe area will eliminate frequent lining replacement.

    Again, all castings are made from silicon die-cast bronze and all hardware such as pins and bolts, are made from stainless steel. Even in the most harsh environment this caliper will give years of trouble free service because of its fine engineering and selection of material.

    This caliper is also available in a side mount version (see separate product sheet.

    Model 5028-CM (Air/spring applied Brake)

    The 5028-CM brake caliper is operated by a heavy duty industrial type dual-function brake actuator which can provide reliability and precision in any braking operation.

    In the upper chamber of the actuator pot, air pressure is required to overcome the spring pressure to put the brake into a released position. In the absence of air pressure, the spring will provide the necessary force for emergency braking. The upper spring can only provide slightly more than half of the brake force.

    In the lower portion, modulated air pressure is applied to the diaphragm against a light spring for the normal braking action. The combination of these actions results in a sensitive and precise braking operation on varying control air pressures. The wedge mechanism consists of a wedge and rollers that force the levers apart thus applying pressure to the brake disc and give a very accurate control over the brake torque.

    AIR APPLIED DISC BRAKES CALIPER No. 5040-A INDUSTRIAL BRAKE

    The air applied model 5040-A is a pneumatically operated caliper requiring only an air supply and a pressure regulator. The pressure regulator can be adjusted to provide the customer with the desired torque or stopping characteristics. Two air-on actuators consisting of a double diaphragm system provide an equal force to each brake shoe when an air pressure is applied. The action of compression springs return the caliper to the 'brake-off' position when the air pressure is shut off.

    Caliper 5040-A is also avaliable in a mechanically applied model. A 5400 lb. pulling force is required to drive a wedge between the two brake arm levers thereby applying the brake.

    Both types employ the balancing link which ensures equal wear on both linings.

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