Bogie K2 is fitted with a variable friction damping mechanism and features a cast steel triple bogie. The bolsters and side frames are constructed from B-grade steel. Its central suspension system incorporates a two-stage stiffness spring, with the damping spring surpassing the pillow spring in stiffness. An elastic cross-support device is installed between the frame's two sides. Additionally, it features double-acting elastic side bearings, speed-boosting double-row tapered roller bearings, and speed-boosting wheels. The wheel tread shape utilizes LM wear tread, complemented by oil-containing nylon heart plate wear plates. For the basic braking mechanism, a combined brake beam and forged pull rod are employed.