What are the famous machine tool factories at home and abroad?

It depends on what model and purpose you buy. Each model is the product of planned economy and fixed-point production produced by various manufacturers.

Lathe: Shenyang No.1 Machine Tool Plant CA6 140, Nanjing No.2 Machine Tool Plant C6 136, Guangzhou Machine Tool Plant C6 132, Jinan No.1 Machine Tool Plant C6 16.

Cylindrical grinder: Shanghai Machine Tool Plant M 1432B, Shaanxi Machine Tool Plant M 1332, Shanghai No.3 Machine Tool Plant M 1420A, Beijing No.2 Machine Tool Plant M 1420E and Jinan No.4 Machine Tool Plant M14/KLOC.

Milling machines: Beijing No.1 Machine Tool Plant X6 132, Qiqihar No.2 Machine Tool Plant X6 132, Qinghai No.1 Machine Tool Plant X6 1W, Shanghai No.7 Machine Tool Plant X57-3.

Gear processing equipment: gear hobbing machine in Chongqing Machine Tool Plant, gear shaving machine in Nanjing No.2 Machine Tool Plant, gear shaper in Tianjin No.1 Machine Tool Plant, gear planer in Nanjing Machine Tool Plant, gear grinding machine in Qinchuan Machine Tool Plant and gear grinding machine in Shanghai Machine Tool Plant.

Thread machine tool processing equipment: thread milling machine of Hanjiang Machine Tool Plant, thread milling machine of Shanghai Machine Tool Plant, thread milling machine of Qinghai Second Machine Tool Plant and thread lathe.

Planer: Jinan No.2 Machine Tool Factory Planer, Taiyuan Machine Tool Factory Planer, Changsha Machine Tool Factory Shaper, Qingdao Shengjian Machine Tool Factory Shaper, Shanghai Hudong Machine Tool Factory Shaper.

Drilling machine: Dahe Machine Tool Plant and Changzhou Machine Tool Plant.

I won't list them one by one. Every field has its own famous brand manufacturers. The quality of machine tools produced by well-known domestic brand manufacturers in the 1980s and 1990s is the best. Now these old state-owned enterprises have already been restructured, vicious competition is fierce and the quality is getting worse and worse.