German Renold coupling Renold model Renold price

Renold 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, and the tooth surfaces of the internal and external gears periodically slide axially relative to each other, inevitably forming tooth surface wear and power loss. Therefore, gear couplings must operate under good lubrication and sealing conditions.

Renold coupling features and applications

1) Cross universal couplings enable continuous constant-velocity rotation of two shafts that are not on the same axis, have large axis break angles, and significant axial movement. 2) Cross universal couplings reliably transmit torque and motion. Their most notable feature is substantial angular compensation capability. 3) Cross universal couplings adopt an integrated yoke head, enhancing operational reliability. 4) Cross universal couplings feature a compact structure, high transmission efficiency, low noise, long service life, and convenient maintenance. Cross universal couplings are suitable for transmitting torque in the mechanical shaft systems of metallurgical machinery, heavy machinery, petroleum machinery, engineering machinery, lifting and transport machinery, locomotives and rolling stock, light industry machinery, precision machinery, control machinery, and other heavy machinery industries.

Renold coupling installation

Assembly technology for cross universal couplings: During assembly, remove burrs and clean all parts. During assembly, ensure that the centerlines of the bearing holes of the two intermediate welded yokes are in the same plane; the permissible deviation must not exceed 1°. The spline section should slide freely, and the joints should rotate flexibly. Clean the surfaces. Except for the flange end faces and end face keys, which should be coated with anti-rust grease, apply one coat of anti-rust primer to the remaining surfaces, then paint (do not brush paint).

Renold coupling structure and maintenance

Cross universal couplings are available in various structural types. The most notable feature of cross universal couplings is their substantial angular compensation capability, compact structure, and high transmission efficiency. In practical applications, they are classified into heavy-duty, medium-duty, light-duty, and small-sized types based on the torque transmitted by the universal shaft. Types include cross-axis cross universal couplings, ball cage cross universal couplings, ball fork cross universal couplings, block-type cross universal couplings, ball pin cross universal couplings, ball joint cross universal couplings, ball joint plunger cross universal couplings, three-pin cross universal couplings, triple-yoke cross universal couplings, triple-ball-pin cross universal couplings, and hinge-rod cross universal couplings. The most commonly used type is the cross-axis cross universal coupling, followed by the ball cage cross universal coupling. Maintenance method for cross universal couplings: Regular lubrication is recommended, with oiling once a week, or daily under high-temperature conditions. To increase the service life of the universal coupling, adjust the cross shaft by 180 degrees during each disassembly to alternate the use of the cross shaft journals.

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