The answer varies and you will need a long table to get all the information needed. Now here, the spanner size would be (3*1.5) +1=5.5mm. Chart for imperial measurements. a 1/2" W spanner fits a Whitworth bolt with a shank/thread diameter of 1/2"). I need to know which cone hub spanner size i need for theses 3 hubs : Giant Sport Tracker Disc, 32h Formula DC 22 rear disc, QR Formula DC 51 alloy disc w/15 mm Are the sizing specific to a specific hub or it apply to the whole brand ? Hex Key Size 3/16 1/4 5/16 3/8 3/8 7/16 Diameter M16 MIO M12 M14 M16 M18 M20 M22 M24 M30 Wrench Size 7 mm 8mm 10mm 13mm 17mm 19mm 22mm 24mm 27mm 30mm 32mm 36mm 46mm Hex Key Size 3 mm 4mm 5mm 6mm 8mm 10mm 12mm 14mm 14mm 17mm 17mm 19mm 22mm 1 1 1/2 5/8 3/4 3/4 7/8 7/8 1/4 1/2 1 2 2 2 7/8 /16 1/4 5/8 . 1.5d+ 1 or 2, where d is the bolt size. Related Topics . Below is that bolt chart with wrench size. Wrench Sizes Or Spanner. Hello! The Y axis is measurement in millimeters. The table below shows common sizes of thread and their equivalent wrench or spanner size. For bolt size up to M14 bolt spanner size is dia*1.5+1=SPANNER size. For this reason, BSF spanners are one size larger than the equivalent BSW, despite the fact that the bolt head is exactly the same size. Suppose a bolt size is more than M14, then you need to apply this formula: (bolt size*1.5) Example: bolt size is M20, then the spanner size will be (20*1.5) =30mm. example M12 bolt 12*1.5+1= 19 spanner. Miscellaneous - Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more; Fasteners - Bolts, nuts and threaded rods - torque, tension and loads; Related Documents . Above from M16 bolt spanner size is dia*1.5= SPANNER size ... 1 decade ago. For metric there is some kinda formula: spanner size is the Square root x bolt size, then rounded off. The X axis is the gauge size. Bolt Chart With Wrench Size. So, a 14 spanner would be a metric size 14 box-end wrench. What is the spanner size and bolt size relationship? MikeMilburn (Mechanical) 12 Jan 02 07:46 A very rough rule of thumb is the wrench size is 1 1/2 times the bolt size, ie, a 1/2" bolt-3/4" wrench, 1" bolt- 1 1/2" wrench. We will explain and define all the values such as diameter of a bolt, head and wrench size. This leads to instances where for example, a spanner marked 7 ⁄ 16 BSF is the same size as one marked 3 ⁄ 8 W. In both cases the spanner jaw width of 0.710 in, the width across the hexagon flat, is the same. Which wrench you do need for a specific bolt? ASME/ANSI B16.5 - Flanges and Bolt Dimensions Class 150 to 2500 - Diameters and bolt circles for standard ASME B16.5 flanges - 1/4 to 24 inches - Class 150 to 2500 The size of the bolt head also increases proportionally. RE: Spanner size - Bolt Size. Let’s understand this with another example. Confusion can arise because each Whitworth hexagon was originally one size larger than that of the corresponding BSF fastener. The 'sizes' of Whitworth spanners refers to the diameter of the threaded stud, and not the bolt head itself: it is not an AF system. For the 'British' sizes, the nut/bolt size corresponds to the spanner marking (i.e.
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