Machnery ,CNC.CAD .CAM, CNC Programing, CNC Tools , เครื่องมือ , เครื่องจักร อุตสาหกรรมExcavator, Skid Steer, Forklift, Caterpillar,

KMI Pulp Machines

KMI Pulp Machines

ArcelorMittal doubles production cuts

The biggest steel maker in the world, ArcelorMittal has decided to reduce production of steel following slow demand due to global economic crisis. Its margin has been impacted due to slow demand by reality and automobile sector. Analysts of Citigroup Inc., Johan Rode and Peter Marcus has forecasted the decline in demand in the coming year. Many Russian, South Korean and Japanese steel giants have already decided to reduce production after noting decline in demand.

The chairman and CEO of ArcelorMittal, LN Mittal on Wednesday said that the company is planning to reduce production by 30 per cent besides scraping its growth plans temporarily due to the ongoing financial crisis. He ruled out any retrenchment drive by the company but hinted at rationalization of the work force in case slowdown continues.

ArcelorMittal had earlier decided to invest $50 billion to increase its steel capacity to 130 mt from 110 mt by 2012. Its net may drop about 48 per cent to $2.5 billion in the fourth quarter. However, Chief Financial Officer, Aditya Mittal hoped that normalcy would come at the beginning of New Year.

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Morse taper shank

Posted in power tools

The morse taper twist drill bits pictured right are used in metalworking. The full range of tapers is from 0 to 7.

The morse taper allows the bit to be mounted directly into the spindle of a drill, lathe tailstock or (with the use of adapters) into the spindle of milling machines. It is a self locking (or self holding) taper of approximately 5/8" per foot [1] that allows the torque to be transferred to the drill bit by the friction between the taper shank and the socket. The tang at the end of the taper is only for ejecting the drill bit from the spindle, with the aid of a drift.

The arbor of a drill chuck is often a morse taper and this allows the chuck assembly to be removed and directly replaced with the shank of a morse taper drill bit. A range of sleeves may be used to bring the size of the smaller morse tapers up to the size of the drive spindle's larger taper. Sockets are also available to extend the effective length of the drill as well as offering a variety of taper combinations.

The detail image shows a morse taper shank on a 16 mm diameter drill bit.

* Simple to manufacture on a lathe
* Cannot be held in a chuck or collet
* High torque transmission provided the bit is driven hard into the workpiece
* Very accurate centring

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List of power tools

Posted in power tools

Power tools include:

Air compressor
Band saw
Belt sander
Biscuit joiner
Ceramic tile cutter tile saw
Chainsaw
Circular saw
Concrete saw
Cold Metal Cutting Saw
Crusher
Diamond blade
Diamond tools
Disc sander
Drill
FLIM
Heat gun
Impact Gun
Impact wrench
Jointer
Jigsaw
Lathe
Nail gun (Electric and Battery as well as Powder Actuated)
Needle Scaler
Powder-actuated tools
Radial arm saw
Random orbital sander
Reciprocating Saw
Rotary Reciprocating saw
Rotary tool (such as Dremel)
Side Grinder
Sabre Saw
Sander
Scrollsaw
Steel cut off saw
Table saw
Thickness planer
Wood router
grinder
Trimmer

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Cordwood Saws

Posted in power tools

Cordwood saws, also called buzz saws in some locales, use blade of a similar size to sawmills. Where a sawmill rips (cuts with the grain) a cordwood saw crosscuts (cuts across the grain). Cordwood saws can have a blade from 20 to more than 36 inches diameter depending on the power source and intended purpose. Buzz saws are used to cut long logs (cordwood) and slabs (sawmill waste) into pieces suitable for home heating (firewood).

Most cordwood saws consist of a frame, blade, mandrel, cradle, and power source. The cradle is a tilting or sliding guide that holds logs during the cutting process. Some cordwood saws are run from a belt from a farm tractor power takeoff pulley. Others are equipped with small gasoline engines or even large electric motors as power sources. The mandrel is a shaft and set of bearings that support and transfer power to the blade. The frame is a structure that supports the cradle and blade at a convenient working height.

Cordwood saws were once very popular in rural America. They were used to cut smaller wood into firewood in an era when hand powered saws were the only other option. Logs too large for a cordwood saw were still cut by hand. Chainsaws have largely replaced cordwood saws for firewood preparation today. Still, some commercial firewood processors and others use cordwood saws to save wear and tear on their chainsaws. Most people consider cordwood saws unsafe and outdated technology.

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Best Circular Saw

Posted in power tools

A woodworker may choose to employ a circular saw for the same reasons that carpenters and building contractors have used them for years: they are powerful, portable, able to be set up to rip, crosscut and cut many non-wood materials. Here, we'll discuss the features you should look for when choosing a circular saw.

Bigger is Usually Better: Circular saws come in a few different sizes (based on the diameter of the saw blade), from 4" up to the most common size, 7-1/4". They also are typically rated by horsepower and/or RPMs of the saw blade.

When choosing a circular saw, a good rule of thumb is to buy one that has higher horsepower than other models of the same size. While a 1-HP 7-1/4" circular saw would probably be adequate, I like models that are at least two horsepower, as they are less likely to bind when under a load.

Saw Adjustments: Circular Saws have controls for adjusting the depth of the cut (from zero to about 2-3/8" on a typical 7-1/4" model) and the bevel of the cut (the saw blade can be beveled from zero to 45-degrees). Check to see that these controls are easy to adjust and can be firmly tightened to hold the depth or angle. Some models use relatively large, lever-type controls where others employ little more than a wing nut.

Safety Features: Circular Saws all have some basic safety features. Check to see that the saw you're considering has a safety switch, which must be held before the trigger can be depressed. There should also be a blade guard that moves easily when pushing the saw through wood, but springs back into place when the saw is away from the stock.

As with all tools, circular saws can be very dangerous if not used properly. Always read, understand and follow the safety instructions that come with the saw.

Additional Features: Better quality saws employ additional features such as an anti-locking clutch, which are flanges on either side of the blade that will allow the blade to slip if the blade binds on the stock, to protect the motor and drive mechanism. Another useful feature is a blade lock, which locks the drive spindle in place, making it easier to change the saw blade.

A.C. Power vs. Battery-Powered Saws: A recent advancement in circular saws is battery operated, 4-inch blade models. These are wonderful for small cutting operations, such as paneling or 1/4-inch plywood. They're lightweight and perfect when you need to reach high to make a cut. However, they're lacking in horsepower, and aren't much use for cutting more than a just a few 2x4s. I would definitely recommend having one of these battery-operated units on hand, but not until you have a number of other tools in your arsenal.

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