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The jig saw concept first came about when an engineer attached a saw blade to his wife's sewing machine. Jig saws are used to cut out intricate patterns in the material you are shaping. If you need a curved edge or a circular cut out in the center of your material, a jig saw is the tool to do it. A jig saw blade moves in a rapid up and down motion to cut the material you are working with. The important thing to remember is that your body is softer than the material you are cutting and the blade will cut through you faster than the material. Be observant of where the blade is at all times and avoid cutting yourself. Bosch power tools were the first toolmakers to offer a jig saw to consumers. Bosch power tools are designed to aid in the workplace by being built to withstand the punishment professionals give their tools in the rush to finish work on time. Most are built to withstand a drop of ten feet and still work reliably afterwards. After vibration was noticed as detrimental to the physical health of workers, Bosch power tools set out to reduce vibration from their equipment. Bosch power tools has reduced the vibration by 60% over the years. Along with the low vibration, Bosch power tools are designed for low sound emissions as well. The fan motors are pitched to be less irritating and pointed away from the user as well so little noise directly impacts the worker. Handles and weight distribution are designed to make the tools comfortable to grip and use. Buttons and switches are conveniently placed to make the operation of Bosch power tools easier to do one handed. Bosch power tools even have left handed equipment available. Bosch power tools are ergonomically friendly, tough enough to withstand abusive treatment and quick to make adjustments to while working. This allows more production to be accomplished in a professional setting. This also makes them some of the most expensive available. There is an old saying that you get what you pay for. With Bosch power tools, this is definitely true. Alexander is the owner of patents for Mobile Railway Wheels Turning Device and Universal Heating System. For more info visit website at http://www.railwaywheelsrepair.com 1001 The mobile device is designed for rail transport, for wheels of locomotives, motor and freight wagons, in particular, it can be used for elimination of some wheel defects, which appear while in service. A device is known, which, for elimination of rolling stock wheel defects during depot maintenance requires rolling out wheelset from under the wagon with the help of wheel-lifting devices. In this case each wheel is turned separately on a stationary machine. The offered device for elimination of wheel defects appearing while in operation, does not require rolling out wheelsets from under the rolling stock, the wheelset is turned simultaneously. This device can be used everywhere, where an asphalt or concrete lot is available at the level of railhead, and for turning of locomotive wheels an additional pit track is required. The assignment of the device applied for is to extend wheel service time, reducing rolling stock maintenance time. Technical result of the assignment is - elimination of wheel defects (sharp flange, reduced flange in case of wear and resurfacing). For this end for turning wheels of a locomotive with power traction motor, a support is set under the wheel being turned. The wheelset preliminary should be lifted and leveled against the railhead by 15-25 mm with help of hydraulic jacks of 30t lifting capacity. One of the jacks is placed on the support body and serves for its fixation against the wheel turned. 60 V DC from a power supply is applied to the terminals of the traction motor of the wheelset turned. After energizing the wheelset starts to rotate at the rate 200-240 r/min. The holder of the turning tool is moving to the wheel surface to be turned and the turning process starts. The surface processed is checked by a locomotive profile gauge. Locomotive battery can be used as the power supply source. 40V voltage is tapped off the battery by a portable copper cable of 40 mm???2 and applied to rheostat terminals. During a wagon wheel turning the wheelset preliminary should be lifted by 30 t lifting capacity hydraulic jack and leveled against railhead by 15-25 mm. Support is placed under the wheel being turned. An actuator is placed under the opposite wheel of the wheelset. One jack is placed on the surface of the support body, another - at the level of the surface of the actuator body. The jacks are the basic fixing link between the support and actuator roller against the wheelset turned. The device is connected to 220 V AC, 40 V and 100 A power supply. With the aid of the rheostat the actuator roller rotation rate is set to minimal - 100 r/min. According to the principle of friction gear the actuator roller is brought to contact with the wheel tread, the rheostat increases the actuator roller rotation rate and the rotation rate of the wheel turned is brought up to 200-240 r/min. The cutter holder with the cup-tip tool is moving to the surface turned and the turning process starts. The processed surface is checked by the wagon profile gauge. The further turning process is identical to the previous one. Video and photos of Mobile Railway Wheels Turning Device you can see at http://www.railwaywheelsrepair.com About the AuthorAlexander is the owner of patents for Mobile Railway Wheels Turning Device and Universal Heating System. http://www.aaarticles.com/article.php?id=21273 | ||||||||||||||||||||
