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Mainly engaged in precision manufacturing and processing, vehicle oil inlet solenoid valve, oil outlet solenoid valve, common rail pump metering valve research and development, production and sales
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该补芯为石油钻井必备工具，与转盘方瓦相配，驱动方钻杆，该产品通过四个滚子转动减少与方钻杆的摩擦，延长其寿命。对于四方和六方不同规格的方钻杆，可以通过更换滚子与之配合，与各类转盘连接，有四方转动和销轴转动二种形式。按API Spec 7K《钻井设备规范》“设计、制造。
方钻杆滚子补芯技术规范
| 型号 | HDS | 27-HDP | 20-HDP | MDS | 20-MDP | 17-MDP | LDS | |
| 类型 | 重型 | 中型 | 轻型 | |||||
| 最大 扭矩 | N.m | 32365 | 22555 | 13729 | ||||
| ft.lbf | 23871 | 16636 | 10126 | |||||
| 驱动方式 | 四方 | 销轴 | 四方 | 销轴 | 四方 | |||
| 四方 钻杆 | mm | 76.2～152.4 | 63.5～133.35 | 63.5～133.35 | ||||
| in | 3～6 | 21/2～51/4 | 21/2～51/4 | |||||
| 六方 钻杆 | mm | 76.2～152.4 | 76.2～107.95 | 76.2～107.95 | ||||
| in | 3～6 | 3～41/4 | 3～41/4 | |||||
| 外形 尺寸 | mm | 630×630×740 | 630×630×780 | 493×493×696 | 510×510×720 | 458×458×700 | 508×508×700 | |
| in | 24.8×24.8×29.1 | 24.8×24.8×30.7 | 19.4×19.4×27.4 | 20×20×28.3 | 18×18×27.5 | 20×20×27.5 | ||
| 质量 | Kg | 700 | 730 | 670 | 420 | 460 | 340 | 400 |
| lb | 1540 | 1610 | 1470 | 924 | 1012 | 750 | 808 | |
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