半分度头是简易的分度中心，可直接、简接分度，完成面、槽、齿加工，不需配件。但整体结构与分度头相同，快速分度的24孔直接进行2,3,4,6,8,12,24等分分度，随机附3个分度板间接分度等分数2-50,51-380.
SEMI-UNIVERSAL INDEX CENTERB&S TYPE NO.0 , (HEAD-STOCK)
Unit: mm/in
| Model | A | B | H | h | a | b | g | Taper of center | Diameter of spindle hole | N.W(KG) | | BS-0 | 193 | 140 | 173 | 100 | 166 | 90 | 16 | MT2 | 18 | 23.8 | | 7.59 | 5.51 | 6.81 | 3.93 | 6.53 | 3.54 | 0.63 | B&S NO.7 | | BS-1 | 242 | 168 | 220 | 128 | 206 | 113 | 16 | Mt3 | 20 | 35.8 | | 9.52 | 6.61 | 8.66 | 5.04 | 8.11 | 4.45 | 0.63 | B&S NO.9 | SEMI-UNIVERSAL INDEX CENTER B&S TYPE NO.0,(TAIL-STOCK) Unit: mm/in |
| Model | A1 | B1 | H1 | h | a1 | b1 | g1 | Mueasurement m³ |
| BS-0 | 175 | 87 | 107 | 100 | 130 | 92 | 16 | Packed with the Dividing head |
| 6.89 | 3.42 | 4.21 | 3.93 | 5.12 | 3.62 | 0.63 |
| BS-1 | 183 | 87 | 137 | 128 | 158 | 110 | 16 | Packed with the Dividing head |
| 7.20 | 3.42 | 5.39 | 5.04 | 6.22 | 4.33 | 0.63 |
STAND ARD ACCESSORIES
Dividing plate A,B,C
Numbers of holes of dividing plate (worm gear reduction ratio 1:40
Unit: mm/in
| Numbers of hole | Plate A | 15 | 16 | 17 | 18 | 19 | 20 |
| Plate B | 21 | 23 | 27 | 29 | 31 | 33 |
| Plate C | 37 | 39 | 41 | 43 | 47 | 49 |
