Key components include: drive rod, connecting pin, presser foot drive gear, sliding block, set screw, connecting block, needle bar slide block, needle bar drive frame, looper motor mount, gear clamping ring, and miniature linear rolling bearing;
Also included are various parts such as the slider, thread take-up drive mechanism, washer-pin assembly, thread take-up drive rod, L-arm, sleeve, aluminum connecting rod, thread take-up lever support pin, sleeve central shaft retaining ring, needle bar drive hook, thread take-up lever shaft, presser foot drive slider, No. 3 pin, and needle clamp.