![]() Is Makita finally bring anti-kickback safety mechanisms to the 18V LXT line? No, it seems they’re still keeping that feature exclusive to the premium XGT model drill. Even if there was a change, safety guidelines are usually expanded over time, and not relaxed. Its handle grip does not look to be noticeably longer – it looks like a typical Makita cordless drill.ĭid UL change their safety guidelines? I could not find any evidence of this. Here is the new XPH16 hammer drill, which is advertised as delivering 970 in-lbs max torque. Most of Makita’s 18V and 18V-form factor XGT cordless drills and hammer drills have similar handle grip proportions. This is the Makita XGT compact cordless drill, with a 585 in-lb max torque rating. How can this new Makita drill deliver close to 1000 in-lbs of max torque and not ship with a side handle? Possible Explanationsĭoes it have an extended-length handle such that a longer side handle isn’t needed? If that 18V drill, with its 750 in-lbs max torque claims, shipped with a side handle, why doesn’t this new Makita drill come with one? NOTE: If tapping idfficult to machine materials or using small taps, use a lower thread percentage such as 60% to 70%.I reviewed a Ridgid 18V cordless drill (model R86116) a few years ago, and it was advertised as delivering 750 in-lbs of max torque. The UN specification specifies that the common height of a thread should be 5/8 th of this maximum height.ħ5% to 80% thread roughly equals 5/8 th of this maximum height. Thread percentage: (77% thread is what you want to use) A 100% thread is 3/4 qtr, or (6/8 th), of the full 60° triangle which is the maximum allowed height of a full thread, the "V" shape, including flats. NOTE: The tap drill size of a hole that will be cold form tapped is usually bigger than it cutting tap counterpart. ![]() ![]() These taps have no "flutes" and are usually oval shaped or not quite round. Form tap: (Cold forming tap) A tool that makes the helical portion of a threaded hole by forming, or deforming, the material as it moves along a predrilled hole. They should be used in that order when tapping holes that do not break through. Cutting taps usually have sharp "flutes", somewhat like the spirals of a drill, where the chips can accumulate and be ejected out of the hole NOTE: Cutting taps come in sets of 3 A starter tap, a midway tap, and the bottoming tap. Cutting Tap: A tool that makes the helical portion of a threaded hole by cutting material as it moves along a predrilled hole. NOTE: Most basic sizes have a coarse and a fine series of thread. Pitch: (Distance between each thread, or "V"s.) The distance the a screw or nut will advance every 360° turn. NOTE: If the length of the threaded portion of a screw or threaded hole is shorter or longer than one inch, the size of the "V" shape is still defined by the number of thread that would fit along a one inch length. TPI: (Threads per inch) The number of thread, or "V"s along a one inch length which in turns, defines the size of the "V" shape of the helical portion of a thread. NOTE: The size of the hexagon of a bolt or nut has no relevance when defining a thread size. The biggest external diameter of a Screw or the biggest internal diameter of a threaded hole. Outside diameter: This is the biggest diameter of the helical portion of a thread. NOTE: The American Metric UN thread standard is compatible with the international ISO Making a thread that follow these specifications will ensure that it will work with threaded holes or shafts made by other manufacturers that follow theseĬommon specs. Metric UN: (American Metric Unified National thread form) A standard that describes the shape of an internal or external thread using Imperial UN: (Imperial Unified National thread form) A standard that describes the shape of an internal or external thread using imperial inch dimensions. ![]() Glossary TDS: (Tap drill size) The size of the hole that must be drilled before a tapping operation.
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