1, rated capacity 15KVA; 2. The maximum clamping force is 50T when the air pressure is 7.2KG/CM; 3. The maximum upsetting force is 16T when the air pressure is 7.2KG/CM; 4, the diameter of the upsetting steel bar: ∅ 7.1 mm, & empty; 9.0 mm, & empty; 10.7 mm, & empty; 12.6mm; 5, the same specification classification: divided into left hand and right hand operation two; 6, the strength loss of the heading steel bar < Five percent.