一般是螺栓的直徑乘以1.5倍就是呆口、梅花的尺寸。內(nèi)六角扳手一般是螺栓的直徑減去2。所有的扳手，包括開口扳手、內(nèi)六角扳手、梅花扳手、套筒扳手等，其尺寸都是指螺栓頭部對邊的寬度尺寸，而螺栓的規(guī)格是指螺紋的公稱直徑。例如，M10的外六角螺栓，其對邊寬度為16mm（參見國標GB/5780-86，設(shè)計手冊上都有），就選用16的開口扳手或梅花扳手。又如GB/70－85內(nèi)六角螺栓，M10的內(nèi)六角螺栓的對邊尺寸為8mm，則選用8mm的內(nèi)六角扳手。
Generally, the diameter of the bolt multiplied by 1.5 times is the size of the socket and plum blossom. Allen wrench is generally the diameter of the bolt minus 2. All wrenches, including open-ended wrench, Allen wrench, box wrench, socket wrench, etc., refer to the width of the opposite side of the bolt head, and the specification of the bolt refers to the nominal diameter of the thread. For example, if the width of opposite side of M10 outer hexagon bolt is 16mm (see GB / 5780-86, which is available in the design manual), 16 open-ended wrench or ring wrench shall be selected. Another example is GB / 70-85 hexagon socket bolt. If the opposite side size of M10 hexagon socket bolt is 8mm, 8mm hexagon socket wrench shall be selected.
隨著經(jīng)濟的發(fā)展，我國很多企業(yè)進口了大量的通用機械（如：水泵、閥門等）和設(shè)備，而這些設(shè)備的制造多采用英制標準，給企業(yè)日常維護時工器具的配備和選用帶來了一定的麻煩，尤其是螺栓所對應(yīng)的扳手。在此，筆者整理提供了一份扳手計算的資料供大家參考。
With the development of economy, many Chinese enterprises have imported a large number of general machinery (such as water pumps, valves, etc.) and equipment, and the manufacturing of these equipment mostly adopts British standards, which brings some trouble to the allocation and selection of tools and instruments during daily maintenance, especially the wrench corresponding to the bolt. Here, the author arranges and provides a wrench calculation data for your reference.
1、計算標準螺栓螺母尺寸（扳手尺寸）的經(jīng)驗公式（采用分數(shù)形式）：
1. Empirical formula for calculating standard bolt and nut size (wrench size) (in fractional form):
標準螺栓螺母尺寸（扳手尺寸）=（螺栓螺紋尺寸分子×3）÷（螺栓螺紋尺寸分子×2）
Standard bolt and nut size (wrench size) = (bolt thread size) × 3) ÷ (numerator of bolt thread size) × 2）
例如：1/2英寸螺紋的標準螺栓對應(yīng)的扳手尺寸=（1×3）÷（2×2）英寸=3/4英寸
For example: wrench size corresponding to standard bolt with 1 / 2 inch thread = (1) × 3）÷（2 × 2) Inch = 3 / 4 inch
2、計算加重螺栓螺母尺寸（扳手尺寸）的經(jīng)驗公式（采用分數(shù)形式）：
2. Empirical formula for calculating the size of weighted bolt and nut (wrench size) (in fractional form):
加重螺栓螺母尺寸（扳手尺寸）=標準螺栓螺母尺寸1/8
Weighted bolt and nut size (wrench size) = standard bolt and nut size 1 / 8
例如：1/2英寸螺紋的加重螺栓對應(yīng)的扳手尺寸=（1×3）÷（2×2）英寸1/8=7/8英寸
For example: wrench size corresponding to weighting bolt with 1 / 2 inch thread = (1) × 3）÷（2 × 2) Inch 1 / 8 = 7 / 8 inch
以下給出了少部分螺栓對應(yīng)扳手的列表，敬請使用。螺栓螺紋
The list of wrenches corresponding to a few bolts is given below. Please use it. Bolt thread
尺寸標準螺栓螺母尺寸（扳手尺寸）加重螺栓螺母尺寸（扳手尺寸）內(nèi)六角螺栓螺紋
Size standard bolt nut size (wrench size) weighted bolt nut size (wrench size) hexagon socket bolt thread
