German IEM coupling IEM model IEM price

IEM couplings are mechanical components used to connect two shafts (driving shaft and driven shaft) in different mechanisms, enabling them to rotate together to transmit torque. In high-speed, heavy-load power transmission systems, some couplings also provide buffering, vibration damping, and improved dynamic performance of the shaft system. A coupling consists of two halves, each connected to the driving shaft and the driven shaft respectively. Generally, prime movers are connected to working machines via couplings.

IEM coupling manufacturing process

Jaw couplings are machined using methods such as turning, milling, and broaching, followed by overall heat treatment to ensure sufficient mechanical strength. There is another type of jaw hub on the market that is cast, allowing for mass production and eliminating machining losses. Therefore, the price is much lower than that of machined parts. However, the performance of castings is not very good. It is best not to use them in important applications. Furthermore, the jaws of cast hubs are prone to tooth breakage (jaw teeth falling off) under high speed or high load conditions. 1) Compact, backlash-free, offers three different hardness elastomers; 2) Can absorb vibrations, compensate for radial and angular misalignments; 3) Simple structure, easy maintenance, convenient inspection; 4) Maintenance-free, oil-resistant and electrically insulating, operating temperature 20℃-60℃; 5) Jaw elastomers come in four-lobe, six-lobe, eight-lobe, and ten-lobe configurations; 6) Fixing methods include set screw, clamping, and keyway fixation.

IEM coupling features

Elastomers are generally composed of engineering plastics or rubber. The service life of a coupling is essentially the service life of the elastomer. Since elastomers are subjected to compression rather than tension, their typical service life is 10 years. Due to the buffering and vibration-damping effects of elastomers, they are widely used in applications with strong vibrations. The performance limit temperature of the elastomer determines the operating temperature of the coupling, generally ranging from -35 to +80 degrees. Jaw couplings feature a simple structure, require no lubrication, are easy to maintain and inspect, are maintenance-free, and can operate continuously for long periods. High-strength polyurethane elastic elements are wear-resistant and oil-resistant, offering high load capacity, long service life, and safe, reliable operation. They provide stable and reliable performance with good vibration damping, buffering, and electrical insulation properties. They have significant axial, radial, and angular compensation capabilities. The simple structure results in small radial dimensions, light weight, and low moment of inertia, making them suitable for medium to high-speed applications. Structural features: 1) Central elastomer connection. 2) Absorbs vibrations and compensates for radial, angular, and axial misalignments. 3) Oil-resistant and electrically insulating. 4) Identical rotational characteristics in both clockwise and counter-clockwise directions. 5) Set screw fixation.

IEM coupling installation method

1) Before installation, first check whether the shafts of the prime mover and the working machine are concentric, and whether there is any packaging paper or damage on the shaft surfaces. Check if there are any foreign objects in the bores of the two half-couplings of the jaw coupling, and whether the edges of the bores are damaged. If so, clean the shafts and half-couplings thoroughly, and file away any damage with a fine file. Then check whether the inner diameter and length of the bores of the two half-couplings match the diameter and shaft extension length of the prime mover and working machine. Generally, when selecting models, it is advisable to make the length of the half-couplings at the prime mover and working machine ends 10— 30mm shorter than their respective shaft extension lengths. 2) To facilitate installation, it is best to preheat the two half-couplings in an oven or oil bath at 120--150, causing the bore size to expand for easier mounting. After installation, ensure that the shaft end does not protrude beyond the face of the half-coupling; flush alignment is preferred. Check the distance between the two half-couplings: measure readings at 3--4 points along the inner sides of the flanges of the half-couplings, take the average, and compare it with the sum of the actual measured dimensions of the spacer and the two disc packs. The error between the two should be controlled within the range of 0—0.4mm. 3) Alignment: Use a dial indicator to check the face runout and outer diameter runout of the flanges of the two half-couplings. When the outer diameter of the flange is less than 250mm, the runout value should not exceed 0.05mm; when the outer diameter of the flange is greater than 250mm, the runout value should not exceed 0.08. 4) Install bolts: Insert the bolts from the outside of the small holes in one flange, pass them through the outside of the large holes in the other flange, fit the buffer sleeves and spring washers, and tighten the nuts with a wrench. If installation is improper or removal/replacement is needed, ensure that the shafts and half-couplings are not damaged. After installation, rotation should be free without binding. 5) Operator notes: Before starting the equipment, check whether the nuts of the jaw coupling are loose or missing. If so, tighten the nuts promptly with a wrench.

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