Mechanical Engineering

A plumbing supply that sells XHCI uncoated or NHCI

Dandong Foundry in China could supply various cast iron castings and products. Many of their castings are exported to USA, Germany, Italy, Japan and other countries.

There are great engineers in many countries throughout the world.

Tac welding is not a specific material. Tac welding is a form of welding, that welder's use in order to hold two pieces' of metal together to get a proper fit. The tac weld can be easily broken if the two pieces' of metal aren't in the right place. So if you tac weld anything, the filler is going to be whatever material you are welding.

There are two main controlling factors in this process

When an investment casting sets it generally shrinks upto a few millimetres from its cast size. Depending on the complexity of the component being made more advanced machinery or more skilled die makers may be required to produce the required shape. In a premium casting upto 1/8 of a millimetre is attainable- to achieve this however there will high set up costs due to the following items. When designing the die to accomodate for post-cast shrinkage the number and complexity of calculations and simulations will be large. The cost and machining time for the die cutting, and the cost of the materials involved will be much higher. The die will require a long post-process, both before production commences and between batches to maintain die consistency and quality. For a commercial standard casting this tolerance will be around +/- 0.5mm depending on the complexity of shape. On the lowest budget this can grow to as high as +/- 2mm. All the above applies for castings <0.5kg.

A turbine pump is nothing but a centrifugal pump. It is used for pumping water from deep water bodies to water distribution systems.

Please see related link for detailed description and its operation.

A rolling offset is generally an offset requiring a change in 2 directions. Eg. A horizontal offset and a vertical change in elevation. There is additional information required to answer the question. What is the angle of the fittings being used for offset? 15 deg. 30. 45? What is the change in elevation?

If this is a flat (no change in elevation offset) using 45 deg., the offset dimension (7') is multiplied by 1.4142 which is the secant and cosecant of 45 deg.

The result 7 ' x 1.4142 = 9'-10 13/16"

Again, this result is for a flat run of pipe. If we have a rolling offset with a change in elevation of say 1'. We can use the Pythagorean theorem (A2 +B2 = C2)

The result would be (1')2 + (9'-10 13/16")2 = 98.99812 sq. ft.

The square root of 98.99812 is 9'-11 3/8"

dentist drills, dump trucks, other construction vehicles

They are eliptical in shape with the leading edge having an airfoil shape, meaning curved across the top to create lift. The rear side of the blade is longer and narrower allowing the air to pass over it easier. It looks like a cross section of a airplane's wing for the full length of the blade.

.1406 inches or 3.57 mm thick. (USG)

Stainless Steal!

Most pipes are made by taking a strip of metal, rolling it up and then fusing the seam together. They're almost always weaker along the seam than anywhere else. There are ways of making pipes where the wall is a single piece that hasn't been welded shut. They're stronger , more expensive and they're called seamless.

a engine runs a machine

Data bus - transfers data round system

address bus - CPU provides the addresses to where the data must be fetched, through this bus

control bus - timing and signals which control data flow in the system.

Kettering Inventions * Electric cash register * Electric auto ignition and self-starter for automobiles first appeared on the 1912 Cadillac. Within a few years, Delco produced a complete starting, ignition and lighting system that is credited with the phenomenal rise of the automobile industry. * Spark plug * Freon for refrigerators and air conditioners. Ridgeleigh Terrace, Kettering's residence in Dayton, was the first air conditioned home in America. * Leaded gasoline * Quick drying paint for automobiles * Safety glass * Portable electric generator * Four-wheel brakes * Automatic transmission * Electric railway gate * First synthetic aviation fuel

motor works on the principle of mutual induction.

force/area = stress (it's the same as pressure)

It is recommended to not exceed 15 degrees.

Hydraulics is the use of liquids to transmit power. Pneumatics is the use of gases (usually air) to transmit power.

2 years

gearshift, brake pedal, and steering wheel.

i think the only difference is hole dia of injectors. which also results into difference in operating pressure and through flow.Further combustion process varies accordingly.

They are of similar design, but a fluid coupling simply transmits torque (with some frictional loss), while a torque converter amplifies torque, similar to a reduction gear.

UTS of 304L Stainless Steel is 586MPa UTS of 304 Stainless Steel is 621MPa

Why not?

AC motors are usually run at constant and DC motors at veriable speeds.

Simply ac or dc motor type should not have any effect on bearings & grease.

Bearing type, operating temperatures, speed, load, duty etc. determine the suitable type of grease and regreasing intervals.

Most of the times motor manufacturers give the info on motor name plate if the motor bearings require regreasing. It is adviseable to always refer to motor or bearing manufacturer recommendations.

Shell Alvania RL3 is suitable for medium size motors (with ball bearings) running at 40C ambient temperatures.

Cheers,

Syed