| 规格及主要技术参数 main specifications | 项目 | item | ma1420a | ma1420a/750 | | 磨削直径范围 | grinding diameters | 8～200 mm | 8～200 mm | | 磨削孔径范围 | gringing bores | 13～80 mm | 13～80 mm | | 最大磨削长度 | max grinding length | 500 mm | 750 mm | | 最大磨削深度 | max grinding depth | 125 mm | 125 mm | | 工作台最大移动量 | max travel of table | 600 mm | 800 mm | | 液压移动速度 | hydraulic traverse speeds | 0.1～4 m/min | 0.1～4 m/min | | 工作台转动范围 | swivel range of the table | -5°～+9° | -3°～+9° | | 砂轮最大线速度 | max peripheral speed of grinding wheel | 35 m/s | 35 m/s | | 最大砂轮直径 | max grinding wheel diameter | 300 mm | 300 mm | | 头架主轴转速 | speeds of headstock spindle | 60,85,230 rpm | 120,170,460 rpm | | 电机总容量 | coolant pump drive motor | 4.24 kw | 4.24 kw | | 机床外形尺寸（长x宽x高） | overall dimensions (lxwxh) | 20001420x1600 mm | 27001420x1600 mm | | 机床重量 | weight of machine | 2100 kg | 2600 kg | 工作精度 working accuracy | 项目 | item | ma1420a | ma1420a/750 | | 外圆圆度 | ex ternal | 0.003 mm | 0.003 mm | | 内孔圆度 | in ternal | 0.005 mm | 0.005 mm | | 纵截面直径 | cylindricity | 0.005 mm | 0.005 mm | | 外圆粗糙度 | ex surface | ra≤0.32μm | ra≤0.32μm | | 内孔粗糙度 | in surface | ra≤0.63μm | ra≤0.63μm | main accessories主要附件 | 1 | 冷却液箱coolant tank | 1 set | | 2 | 开式中心架open center rest | 1 set | | 3 | 砂轮修整器grinding wheel dresser | 1 set | | 4 | 砂轮夹板grinding wheel clamp | 2 sets | | 5 | 砂轮平衡器grinding wheel balancer | 1 pc | | 6 | 合金carbide-tipped center | 2 pcs | | 7 | 半缺half center | 2 pcs | | 8 | 桥板bridge plate | 1 pc | | 9 | 夹头chuck | 1 set | | 10 | 双头扳手double end werch | 6 pcs | | 11 | 内六角扳手socket head screw wrench | 5 pcs | | 12 | 六角套筒扳手hexagon socket wrench | 1 pc | | 13 | 三角胶带vblet | 2 pcs | | 14 | 支点底座support iron | 3 pcs | | 15 | 松卸螺帽dismountingnut | 1 pc | | 16 | 三爪卡盘three jaw chuck | 1 set | | 17 | 闭式中心架closed center rest | 1 set | | 18 | 内磨接长轴grinding wheel arbors for internal grinding | 4 sets | | 19 | 多楔带v-ribbed belt | 2 pcs | | 20 | 平皮带flat belts | 2 pcs | | 21 | 内磨遮板splash guard for internal grinding | 1 set | | 22 | 其他附件other accessories | | |
