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Machinery and Tools
The Machinery and Tools category covers questions regarding hand tools, power tools, workshop machinery (such as lathes, milling machines, etc), welding and cutting tools and equipment, measuring instruments, earth-moving machinery, furnaces, factory and industrial machinery.
1,597 Questions
What year was jump rope invented?
The history of jump rope starts off with the Ancient Romans. During the time when they had prisoners and slaves they would make them either fight in the Colosseum against Gladiators or lions. Many who fought were mostly men. They fought for their lives and sometimes but very rarely freedom. Having been forced to fight they had no other choice. Jump rope was one of the things that occurred from a battle in the Colosseum. A man well actually slave whose name was Andraous Liabath was fighting a lion. And this lion and just been brought from another country but as the Romans would call it, savage land. Andraous was fighting the lion, however the lion being not properly tamed or fed was on a chain for the safety of the audience. Andraous to escape the lion or confuse it was jumping back and forth over the chain. Soon the lion became annoyed and lashed out lifting the chain above Andraous. When the chain landed on the ground Andraous then jumped over it again. From then roman children had used chains or ropes to jump up and down over the rope as Andraous had done. So that was the way jump rope occurred from.
What role did machines play in the Industrial Revolution?
It provide the energy required for locomotion like the trains.
The health and safety requirements and safe working practices and procedures requiered for the hand fitting activited undertaken are; you must ensure you wear the correct PPE such as correctly fitting overalls and safety boots and if using any machinery you should always wer saftey goggles, you must also make sure you mount, atatch and use all tools correctly and you need to check they are not damaged or faulty if they are faulty you must reprt it to an instructor and you need to keep your work area clean and tidy at all times retaining tools and equipment back to the correct location.
Does rope have a long o sound?
Yes. The silent E gives the O an "oh" sound. It rhymes with hope and pope.
What is the function of universal dividing head in a milling machine?
The function of the dividing or indexing head is to equally space the required amount of grooves to be cut into a component. An example would be a gear or a shaft with a spline at the end. It can also be used for high precision drilling of holes. cutting hexagons or other shapes, etc. With the right attachments a dividing head can be connected to a universal milling machine's table screw, enabling it to rotate as the table moves along its sideways axis. This is useful for helical grooving of which a drill bit or helical gear are examples.
An almost similar device to a dividing head is a rotary table.
What are the advantages and limitations of a CNC machine?
Benefits. . High production piece. Accuracy. Production speed.
Constraints .. Long-term planning. Expensive CNC machine
How do you know how much torque your electric impact wrench is putting out?
You can never get exact torque, but with a little practice you can come close.
first, set your gun on it's min setting and you compressor on max rated for that gun. tighten a bolt,removing the gun the moment it starts to slip. Use a torque wrench to verify the torque on the bolt.
second, do this for the next two setting on your gun. and mark down all values.
Third, reduce the air pressure on your compressor by 10psi and repeat the steps above, always writing down the values.
four, reduce your air pressure by another 10 psi and repeat.
Eventually you will have a chart of approximate torque delivery.
Five, repeat all steps above to verify consistency.
The key is two fold,
always remove the gun at the same time for all settings.
always make sure you gun is getting the same air pressure for each stage selected
How does the milling machine work?
CNC's are programmed by a cnc programmer, who uses a machining print to determine X,Y, and Z, coordinates for each cutting tool inside the CNC to move to. This causes, the part that is load to be cut, drilled, tapped, bored, counter bored, chamfered, etc.
How are cnc machines programmed?
How do you reduce cycle time of cnc machine?
The best ways to decrease the cycle times of a CNC machine is to
- Review the program and find where bigger depth of cuts are possible.
- Slightly faster feeds can be made if possible.
- Safely indexing to a new tool closer to the workpiece.
- Another thing would be to drastically increase the feed (but not rapid movement) from where the tool stops when it approaches the workpiece to right before it starts cutting.
Why is clearance provided in a reciprocating compressor?
To prevent the piston from slamming into the heads, a space must be provided to cushion the piston and bring it to a stop before the return stroke.
What welding parameters to consider to produce quality weld?
There are 4 basics to producing a good weld bead.
Correct
#1 Amperage #2 Electrode Angle #3 Arc Length #4 Travel Speed
Factor in electrode manipulation in some cases.
How many watts in 500 amperes welding machine?
A welding machine rated at 500 amperes uses around 120000 watts of power. This is used in very heavy industrial applications due to its large power draw.
== == Carbide generally describes a group of materials characterized by high hardness and metallic properties. Carbide cutting tool can cut a material which is having 60 HRC steel. Find the below link to know more about carbide cutting tools. www.ceratizit.com Rasheed.
How does a servo motor function?
Control of the active power supplied
by the generator to an interconnected
network
• Control of network frequency on an
isolated electrical network
• Protection of the unit against over speed
in case of load rejection
Advantage and disadvantage of repulsion type moving iron instrument?
- The instruments are suitable for use in AC and DC circuits.
- The instruments are robust, owing to the simple construction of the moving parts.
- The stationary parts of the instruments are also simple.
- Instrument is low cost compared to moving coil instrument.
- Torque/weight ratio is high, thus less frictional error.
- Error due to variation in temperature.
- Error due to friction is quite small as torque-weight ratio is high in moving coil instruments.
- Stray fields cause relatively low values of magnetizing force produced by the coil. Efficient magnetic screening is essential to reduce this effect.
- Error due to variation of frequency causes change of reactance of the coil and also changes the eddy currents induced in neighbouring metal.
- Deflecting torque is not exactly proportional to the square of the current due to non-linear characteristics of iron material.
Can a 3 phase 440v welding machine be changed to 220v residential power input?
Some 3-phase machinery can be adapted for use in a 2-phase system using a phase-shifting capacitor (See the related link for a (German) Wikipedia article about the Steinmetz circuit for details).
However, a welding transformer is likely to draw too much power and thus be unsuitable for this trick. It will probably be cheaper to install a 3-phase connector in the residential home (many houses have 3 phases installed at the meter board), or to load a welding transformer for use with a single-phase residential system (if this is for a single occasion).
Fretting corrosion is a complex process which involve chemical corrosion and friction (by asperities, surface irregularities) between components in motion, fluids moving in tubes, etc.
What are the disadvantages of water wheels?
The biggest disadvantage of a horizontal waterwheel is that the weight of the turning wheel works the most against the current in this situation. In vertical waterwheels, the momentum of the descending parts isÊadded to by its own weight.
A 'pillar drill' or vertical drill press is a large drilling machine that stands on a very heavy steel base. A 3" or 4" steel column extends up either about 6 feet for a floor model or 3 for a bench model. At the top of this column is an elongated box with the motor at the back, driving a shaft with a 4 tier pulley above it. The front of the box contains a hollow shaft with a spindle inside it. The spindle also has a 4 tier pulley on top. The hollow shaft can be wound up and down by the side control lever, l
owering or raising the drill shaft and chuck, A belt between the 2 pulleys in the box drives the spindle and the chuck connected to it's lower end. In the middle of the column, a table, usually about 15 " square can move up and down the column to adjust work height
