Q:I'm going to drill 10.5 of the thread. How many holes do I have to drill before tapping? How big is the tap?

Drill 10.5 (should be M12) of the screw holes to drill 10.25mm hole and tapping, tapping with M12 tap.

Q:Electric hammer drill killed what should take down

Electric hammer drill, is the "two function drill" and "hammer" handheld electric tool, "rotary cutting drill", with the impact of the impact mechanism of driving impact drill bit, drill driven in rotation at the same time, there is a direction perpendicular to the rotation of the rotary drill reciprocating hammer exercise. For concrete, brick, tile, marble and other materials drilling. "Hammer" to drive the impact force of drill rod, used for concrete, bricks and other materials on the slotting, holes or broken concrete etc..

Q:The threaded hole M5 general drill big bottom

M5 is an ordinary coarse thread, with a pitch of 0.8mm and a nominal diameter of 5mm. General coarse thread without marked pitch.

Q:I want to be in the stainless steel frame and fixed drill a few screws, with what bit and screw

It is the best to drill stainless steel with carbide drills, and if you do not have a carbide drill, you can drill with an ordinary bit;

Q:What drill is drilled after quenching?

Quenching: a heat treatment process for quenching of metals and glass. Steel the steel quenching is heated to the critical temperature Ac3 (hyposteel) or Ac1 (hypereutectoid steel) above the temperature, holding time, so that all or part of 1 Austenitic, then the cooling rate is greater than the critical cooling rate of fast cooling to below Ms (or near Ms ISOTHERMAL MARTENSITE () or bainite) heat treatment process transformation. Aluminum alloys, copper alloys, titanium alloys, tempered glass and other materials are usually treated by solid solution or heat treatment with rapid cooling process.

Q:What are the brands of homemade twist drills?

Twist drills are made of many different materials, and different materials have different hardness. The angle or just ordinary relatively low hardness, so in theory, as long as the geometric angle of precise angle quasi good drill, only poor material life is low. Because of this, so many people like fraudulent use of materials, or connecting the handle with other materials, the head good. But now there is a process called roast yellow, this process after the connection part of the defect, a look at it.

Q:How big expansion screw does the 6mm bit have?

6mm drills are generally equipped with 5mm expansion screws (the smallest specification).The relationship between the drill bit and the expansion screw is the drill diameter = the expansion screw diameter +2mm. For example, the expansion screw of 6mm shall be opened with 8mm drill bit.

Q:What size drills and taps are required for drilling M10's internal threads?

Internal thread drill M10 should choose the drill and tap should take into account the thread pitch. If you are a standard thread M10*1.5, thread holes should be used with 8.5 bit;

Q:How long the hand-held electric hammer drill

Matched with various electric machine, concrete, brick and other building materials for hard drilling. The utility model is a drilling tool with wide use and high efficiency in the construction and installation industry.

Q:What is countersunk drill, flat head drill?

Countersunk drill: it is a well formed drill bit that is basically used for machining countersunk headsA drill bit used to hide six square screws