German STRACK coupling STRACK model STRACK price

STRACK couplings are divided into two main categories: convex and concave. The convex type is further divided into three types: integral with skeleton, integral without skeleton, and radial slit. The inner side of the tire ring is bonded to the steel skeleton by vulcanization, and nuts are welded at the bolt holes on the skeleton. During assembly, bolts are used to connect the flanges of the two halves of the coupling. Torque is transmitted by the friction generated between the tire and the flange end faces when the bolts are tightened. The tire ring undergoes torsional shear deformation during operation, so tire couplings have high elasticity, a large ability to compensate for relative displacement of the two shafts, and good damping. Moreover, the structure is simple, requires no lubrication, and is relatively convenient to assemble, disassemble, and maintain. Its disadvantages are low load capacity and large overall dimensions. As the relative torsion angle between the two shafts increases, the tire shape becomes twisted, and the axial dimension slightly decreases, generating significant additional axial forces on the two shafts, which increases the bearing load and reduces service life. When the tire coupling operates at high speed, the outer edge of the tire expands outward due to centrifugal force, further increasing the additional axial force. Therefore, measures should be taken during coupling installation to make the stress direction in the tire opposite to the stress direction generated during operation, thereby offsetting part of the additional axial force and improving the working conditions of the coupling and the two bearings.

STRACK coupling features

1) One-piece metal elastic element; 2) Zero backlash, synchronous operation; 3) Elastic action compensates for radial, angular, and axial deviations; 4) High torque rigidity and excellent sensitivity; 5) Clockwise and counterclockwise rotation characteristics are identical; 6) Maintenance-free, oil-resistant, and corrosion-resistant; 7) Available in aluminum alloy and stainless steel materials; 8) Fixing methods mainly include set screw and clamping.

STRACK coupling application range

Elastic couplings are made of aluminum alloy. Some manufacturers also offer elastic couplings made of stainless steel. In addition to corrosion resistance, stainless steel elastic couplings also increase torque capacity and rigidity, even reaching twice that of similar aluminum alloy products. However, this increase in torque and rigidity is offset to some extent by the increased mass and inertia. Sometimes the negative effects outweigh the advantages, forcing users to seek other types of couplings.

STRACK coupling installation and fixing

1) Elastic coupling set screw fixing: Two set screws with a gap of 90º lock onto the fixed shaft. This is a traditional fixing method. Since the front end of the screw contacts the shaft center, it may cause damage to the shaft center or make disassembly difficult. 2) Lingshi elastic coupling clamping screw fixing: Uses the tightening force of hexagon socket head cap screws to contract the slit, tightly holding the shaft center. This method is convenient for fixing and disassembly, does not damage the shaft center, and is a very common fixing method. 3) Elastic coupling keyway fixing: Suitable for high-torque transmission. To prevent axial slippage, it is usually used in combination with set screw fixing and clamping screw fixing. 4) Elastic coupling D-hole fixing: Typically, if the motor shaft is D-shaped, and set screws cannot secure it, the coupling hole can be machined into a D-shaped hole corresponding to the motor shaft size. Combined with set screw fixing, this prevents slippage. 5) Clamping hub fixing: Tightens the four set screws on the end face of the Lingshi coupling to compress the clamping hub for secure fixing. Suitable for connecting and fixing high-torque stepper motors and servo motors, such as clamping hub diaphragm couplings, clamping hub jaw couplings, clamping hub bellows couplings, and clamping hub elastic couplings.

Weidou Intelligent Technology specializes in selling German STRACK rigid couplings, STRACK flexible couplings, STRACK safety couplings, STRACK universal joints, STRACK diaphragm couplings, STRACK jaw couplings, STRACK flange couplings, STRACK cross slide couplings, STRACK slider couplings, STRACK gear couplings, STRACK tire couplings, STRACK elastic couplings, STRACK bellows couplings, STRACK roller chain couplings, STRACK spring couplings, STRACK original imports from Germany. Welcome inquiries and orders from customers.