German RADEX coupling RADEX model RADEX price

RADEX couplings consist of components such as an internal gear ring with the same number of teeth and a flanged half-coupling with external teeth. External teeth are available in two tooth profiles: straight teeth and crowned teeth. Crowned teeth refer to external teeth machined into a spherical surface, with the center of the sphere on the gear axis. The backlash is larger than that of standard gears. Crowned tooth couplings allow greater angular misalignment (compared to straight-tooth couplings), improve tooth contact conditions, increase torque transmission capacity, and extend service life. During operation of gear couplings, relative displacement occurs between the two shafts, causing periodic axial relative sliding between the tooth surfaces of the internal and external gears, inevitably resulting in tooth surface wear and power loss. Therefore, gear couplings must operate under good lubrication and sealing conditions.

RADEX coupling introduction

They are divided into two main categories: convex and concave. Convex types are further divided into three types: integral with skeleton, integral without skeleton, and radial slit. Their common feature is that the tire ring is connected to the two half-couplings using bolts to achieve connection between the two shafts. The inner side of the tire ring is bonded to the steel skeleton using vulcanization, and nuts are welded at the bolt holes on the skeleton. During assembly, bolts are used to connect to the flanges of the two half-couplings, relying on the friction generated between the tire and the flange end faces by tightening the bolts to transmit torque. The tire ring undergoes torsional shear deformation during operation, so tire couplings have high elasticity, large capacity to compensate for relative shaft displacement, and good damping. They also have a simple structure, require no lubrication, and are convenient to assemble, disassemble, and maintain.

RADEX coupling imbalance phenomenon

Due to various reasons, the center of mass or principal axis of inertia of tire couplings does not coincide with their axis of rotation. During operation, this produces unbalanced centrifugal inertial forces, centrifugal inertial couples, and dynamic deflection (vibration mode), known as rotor imbalance. This imbalance inevitably causes vibration in the shaft system, affecting normal machine operation and service life, so it must be taken seriously. To correct or minimize the imbalance of tire couplings, an appropriate balance grade should be selected as needed. After product manufacturing and installation on the machine, balance is achieved on the specified balance (correction) plane of the coupling by adding or removing appropriate mass to meet the balance grade requirements. This process is called balance correction, or simply balancing. The degree of imbalance (imbalance amount U) is usually expressed by the product mr of the rotor mass m and the distance r from the center of mass to the rotor axis of rotation, known as the mass-radius product. It can also be expressed as the mass-radius product per unit mass, known as eccentricity e (not geometric eccentricity). The mass-radius product mr is a relative quantity related to rotor mass, while eccentricity e is an absolute quantity independent of rotor mass. The former is more intuitive and is commonly used for balancing operations on specific rotors, while the latter is used to evaluate the quality of rotor balance or detect balance precision. The balance grade standard for tire couplings is evaluated based on e.

RADEX coupling maintenance

1) For jaw couplings, listen for abnormal noises, or manually rotate the two half-couplings to check for excessive circumferential play. If present, the jaw rubber ring may be damaged; alternatively, check for looseness between the half-coupling and the shaft. 2) For flange couplings, if the connecting bolt holes or pin holes of the two half-couplings are severely worn, the usual method is to machine the holes and fit suitable bolts, or to fill the holes with electric welding and re-machine them. 3) For slider couplings, pay attention to lubrication conditions. 4) For gear couplings, inspect the tooth profile using calipers, span micrometers, or templates. If tooth thickness wear exceeds 5~30% of the original tooth thickness, replace the component; for running mechanism gear couplings, the limit is 20~30%. 5) Check that the sealing devices, retaining rings, expansion rings, springs, etc., of the gear coupling are not damaged or aged; otherwise, replace them promptly. 6) If the fit between the half-coupling or gear coupling bushing and the shaft does not meet drawing requirements, or if there are significant scratches on the shaft due to key loosening, perform timely repairs. Generally, only the coupling or bushing is repaired; shaft repair is not permitted to prevent shaft breakage accidents. 7) Lubricate couplings requiring lubrication regularly. Slider couplings, universal joints, chain couplings, etc., all require regular oil lubrication. Our company uses universal joints extensively, especially in the packaging workshop.

Weidou Intelligent Technology specializes in selling German RADEX rigid couplings, RADEX flexible couplings, RADEX safety couplings, RADEX universal couplings, RADEX disc couplings, RADEX spider couplings, RADEX flange couplings, RADEX cross couplings, RADEX slider couplings, RADEX gear couplings, RADEX tire couplings, RADEX elastic couplings, RADEX bellows couplings, RADEX roller chain couplings, RADEX spring couplings, RADEX original German imports. Welcome customers to inquire and order.