German GGB coupling GGB model GGB price

GGB couplings contain an elastic compound with pre-compressed rubber, providing additional strength and extending service life. This coupling accommodates all types of misalignment. The hub material is high-strength aluminum alloy, which is lightweight and corrosion-resistant. The rubber component is primarily used for vibration damping, ensuring smooth and quiet power transmission, thereby protecting the drive source and driven machinery. Installation is simple; since the rubber part is a split insert, it can be installed by insertion after shaft alignment. Elastic couplings use parallel or spiral slot systems to accommodate various misalignments and transmit torque precisely. Elastic couplings typically offer good performance and price advantages, making them the preferred choice in many practical applications of stepper and servo systems. The one-piece design enables elastic couplings to transmit torque with zero backlash and offers maintenance-free operation. Elastic couplings mainly consist of two basic series: spiral slot type and parallel slot type.

GGB Coupling Introduction

Gear couplings have a small radial size and high load-carrying capacity. They are commonly used for shaft transmission under low-speed and heavy-load conditions, such as in the metallurgy, mining, and hoisting and transportation industries, and are also suitable for the petroleum, chemical, and general machinery industries. High-precision gear couplings that have undergone dynamic balancing can be used for high-speed transmission, such as shaft transmission in gas turbines. Since the angular compensation of drum-tooth gear couplings is greater than that of straight-tooth gear couplings, drum-tooth gear couplings are widely adopted both domestically and internationally, while straight-tooth gear couplings should be avoided whenever possible. Gear couplings are a type of movable rigid coupling. They transmit torque and rotational motion between the two halves of the coupling through the meshing of internal and external teeth, making them suitable for connecting transmission shaft systems with two concentric axes and providing a certain degree of compensation for relative displacement between the two axes. Its structure is shown in Figure one; it mainly consists of an internal gear ring, a gear sleeve, and end covers. For smaller-sized gear couplings, the end cover and internal gear ring can form an integrated unit. Due to their compact structure, high load-carrying capacity, wide operating speed range, and reliable operation, gear couplings are widely used in various machinery industries, including metallurgy, mining, hoisting and transportation, petroleum, and shipbuilding.

GGB Coupling Features

Gear couplings have small radial dimensions and high load-carrying capacity, and are often used for shaft transmissions under low-speed and heavy-load conditions. High-precision gear couplings that have undergone dynamic balancing can be used for high-speed transmissions, such as gas turbine shaft drives. Since crowned gear couplings offer greater angular compensation than straight-tooth gear couplings, crowned gear couplings are widely adopted both domestically and internationally. Straight-tooth gear couplings are considered obsolete products and should be avoided whenever possible. Commonly available gear couplings on the market include standard structural gear couplings, crowned gear couplings, and nylon gear couplings. Among these, crowned gear couplings come in many models and are widely applied.

GGB Coupling Maintenance

There are hundreds of varieties of gear couplings, but there are basically two forms: 1) Internal and external tooth engagement type; 2) Face tooth engagement type. Other forms are variations based on these two. The internal and external tooth engagement type of gear coupling transmits relatively large torque. During design, considering the different needs of users, the lengths of the shaft ends on both sides of the teeth are intentionally made inconsistent so that users can choose the installation direction as needed. Therefore, there is no stipulation on which end faces which direction. During installation, if replacing on existing equipment, generally the direction should be consistent with the original. If designing and manufacturing new equipment, install according to the principle that more engagement surface between internal and external teeth provides greater reliability, provided there is no interference with surrounding parts. Maintenance of gear couplings is generally carried out as follows: 1) Check the meshing condition of the coupling teeth. The contact area shall be not less than 50% along the tooth height and not less than 70% along the tooth width. The tooth surface must not have severe pitting, wear, or cracks. 2) The total radial runout of the coupling's external gear ring shall not exceed 0.03mm, and the face runout shall not exceed 0.02mm. 3) If the gear ring needs to be removed, special tools must be used; do not strike it to avoid bending or damaging the shaft. When reinstalling, heat the gear ring to approximately 200°C before mounting it onto the shaft. The interference fit between the external gear ring and the shaft is generally 0.01~0.03mm. 4) When reinstalling the intermediate sleeve or other components, assemble according to the original marks and data. 5) Tighten the bolts evenly using a torque wrench.

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