Kardankablar

Kardankablar is the Turkish term for Cardan shafts, a type of drive shaft that transmits torque between shafts that are not in a straight line. They commonly employ Cardan joints, also known as universal joints, which consist of two yokes connected by a cross-shaped element (the spider). The assembly can be housed in a tubular shaft and sealed to retain lubrication.

A single Cardan joint allows angular misalignment but causes non-constant velocity, as the output speed varies with the input angle. This velocity fluctuation can produce vibration and wear at certain operating speeds. To achieve a more uniform output, designs often use a double Cardan arrangement (two joints with a short intermediate shaft) or replace the Cardan joint with a constant-velocity joint in many modern automotive applications.

Typical kardankablar components include the input and output yokes, the cross (spider), bearings, seals, and lubrication passages. Materials are usually high-strength steel alloys, with lighter variants in aluminum for weight savings. Maintenance emphasizes periodic inspection of play, lubrication, and seal condition; excessive play, vibration, oil leakage, or worn bearings indicate the need for servicing or replacement.

Applications of kardankablar span automotive drivetrains, industrial machinery, marine propulsion, and robotics, where flexible alignment is required and rigid shafts are impractical. While modern passenger cars increasingly rely on constant-velocity joints, Cardan shafts remain common in certain trucks, off-road vehicles, and specialized equipment due to their simple design, robustness, and cost-effectiveness. The term and concepts are widely described in Turkish engineering literature as the translation and implementation of Cardan shaft technology.