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What is a commutator stone made of?
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What is a commutator stone made of?
Once back up and running, the collector rings and commutator do not need to be shiny. Choose from our selection of commutator cleaners, including commutator cleaning stones, handle-mount commutator resurfacers, and more Commutator Cleaning Stone. For elements and of a group G, the commutator of and is [,] =. (Well, whether or not it can be derived depends on what you choose the starting postulates to be. The dust of the pumice stone which results reaches the brushes and grinds them in. Jan 14, 2024 · A commutator is a split rotary ring, often made of copper, with one segment attached to each end of the armature coil. Universal "Comm Stick" Carbon Brush Seater and Commutator Cleaner (130mm x 10mm x 5mm, Pack of 1) Quick Buy Code: PLD1458. It's relatively easy to judge DC motor performance by looking at the commutator. It works great as an accent wall on the front. To make the countertops, roughly 90 percent ground quartz is blended with about 10 percent resins, pigments and various compounds to form quartz slabs. Its primary function is to ensure continuous rotation in motors and convert AC to DC in generators. A commutator is a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. A commutator is a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. A commutator is a split rotary ring, usually made of copper, with one segment attached to each end of the armature coil. Commutator stones (or collector grindstones) are used in electric motor construction. Home (current) Thought; Notes. A device that flows in the direction of flow of current through a circuit is called a commutator. The adhesive is most commonly polymer resin, with some newer versions using cement mix. And when it comes to stone products, Eldo. Cleaning Commutator: With the machine running, hold stone lightly against the commutator moving the stone slowly back and forth across the commutator face until any excess film has been removed. $\begingroup$ @NizarHalloun: Terminology issue: A "commutator" is an element of a group. The second way is to look at the commutator subgroup as a measure of how noncommutative a group is. The materials used in the commutator, from the copper segments to. They rest on commutator segments and slide on the segments when the commutator rotates keeping the physical contact to collect or supply the. As the armature rotates within the magnetic field, the commutator. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. Ideally you'd do this on a lathe or in a drill chuck to keep the material removal fairly even. Pull up on the brush and allow to gently return to contact with the commutator or ring to ensure there. Perfect; thanks a lot. According to Mayo Clinic, kidne. For slip rings, select a stone that is about 1/2" wider than the ring. The exact amount of minerals is what creates the different colors and patterns in the beautiful slabs of granite you see. A kidney stone may be treated with shockwave lithotripsy, uteroscopy, percutaneous nephrolithomy or nephrolithotripsy. 1,000+ Results for Commutator Maintenance Products. The cement adds strength and stability, while the aggregates lighten the material making it easy to handle and install. This SUV is perfect for your everyday commute, offering a variety of features that make it an i. Be aw are that if the flexible abrasive stone is used, you will end up removing film from the commutator. A commutator consists of a set of copper segments which are insulated from each other. It removes the carbon build-up from the commutator or slip ring of a motor or alternator. SmartAsset found the American cities where commuting is taking a greater toll. For instance, let and be square matrices, and let and be paths in the Lie group of. The ends of the armature coils are connected to each segment of the commutator. A∗ji =A∗ij A j i ∗ = A i j ∗ Aji =Aij A j i = A i j. Formally, it is an electric transmission device that allows energy flow between two electrical rotating parts, such as in a motor. Around the armature's shaft, the segments come together to form a ring. There are two definitions of "the subgroup of group G generated by subset X of G". This item: Brush Seater & Commutator Cleaning Stone + + Total price: Add all 3 to Cart. Brushes are usually made of rectangular carbon blocks housed in brush holders. This is because the nested commutators are trivial for me to calculate in my case. To ensure effective brush contact, the commutator's surface. Lubrication: Use mineral oil on commutators. Engineered stone countertops, also referred to as human-made stone countertops, are produced in a factory by holding crushed stone together with a resin binder. Sometimes the strips get raised up and make the clicking noise as they tear up the brushes. If the armature includes more than one coil, the commutator will have more than one segment—one for each coil’s end. Commutator and Brushes The commutator of a DC motor is a cylindrical structure that is made of copper segments stacked together but insulated from each other using mica. Profax SKU: PFX-DD-11456. As the armature rotates within the magnetic field, the commutator. Faux stone panels 4×8 are a great way to get the look of natural stone without the cost. The figure that depicts the cross-sectional view is shown below. These are made of hard copper so as to withstand the brush forces which are placed upon the. Terrastone is a stone filler made of purely natural materials of different grain gradation and density. They have both cleaning and dressing stones. Commutation is the process of switching the field in the armature windings to produce constant torque in one direction, and the commutator is a device connected to the armature, which enables this switching of current. Whether they’re set in jewelry or loose and unset, precious gemstones can be valuable if you sell them correctly. In AC motors, slip rings are employed to enable a continuous power transfer, but in DC motors, commutators are used to. What sets each segment apart is the mica insulation nestled between. Perfect; thanks a lot. It can be round in shape or use shaped blocks called Belgian blocks. The commutator is made from two round pieces of copper, one on each side of the spindle carbon ( graphite) is lightly pushed against the copper. The first stone veneer, initially manufactured in the late 19th century, was made of natural stone. They may be flat, for working flat edges, or shaped for more complex edges, such as those associated with some wood carving or woodturning tools. The voltage generated in the armature winding of a DC generator is alternating because it is placed in a rotating magnetic field. Commstones, sorted by Material Grade, custom A commutator is built with a set of contact bars and is set into the revolving shaft of a DC machine allied to the armature winding. A switch is a simple device that interrupts or diverts the flow of electricity within a circuit, allowing users to control power to a device. Are you tired of the same old mundane commute every day? Do you wish there was a way to make your journey more enjoyable and productive? Look no further than podcasts In today’s fast-paced world, finding the best route for your daily commute is essential. The stone is 5/8" x 1-1/8" x 4-3/4". These characteristics give it an antique-like appearance. 19 products. Burnt-out armature: It may be the result of several issues like poor airflow, overloading, stalling, earthing. Any member of the Titanic Historical Society knows that "The Titanic Commutator," the official quarterly magazine of the THS is named after a shipboard device that measures a ship's list Then a chance use of the word in David G. The process of commutation involves switching the field in the armature windings to generate consistent torque in one direction. Vacuumed, cleaned, and raked the grooves clean. Insert the commutator stone into the brushes place inside the motor or alternator. Key points about its working include: Commutator segments and armature coils must have the same number. Decorative stone is a versatile and stylish addition to any landscaping or interior design project. The performance of the split ring commutator itself is largely dependent on two facets: material selection and construction quality. The molds are sometimes made by casting natural stones in order to mimic their look and texture more. 3d heintai Lift brushes from the brush holders and by means of blowing air, clean the area where carbon brushes made contact with the commutator or slip ring to ensure that no grinding dust is set between the segments of the commutator or in the surface of slip ring. To ensure effective brush contact, the commutator's surface. The proper tool is a commutator stone. The commutator is a crucial component in electric motors, generators, and dynamometers. So, even though goldstone isn't really a stone, or made of gold, it is a beautiful product with a colorful and rich history behind it - thanks to the Miotti family, and. This reversal is necessary because the magnetic field generated by the stator's electromagnets changes in polarity as the rotor spins. Jun 24, 2024 · Coil Span Definition: Coil span, or coil pitch, is the distance between the two sides of a coil in a DC machine, measured by the number of armature slots between them. Item: Rubrite Cleaning Stone Type: Rectangle Function: Removes Surface Imperfections From Any Metal original price: $55. A kidney stone may be treated with shockwave lithotripsy, uteroscopy, percutaneous nephrolithomy or nephrolithotripsy. This mica insulation is normally 'undercut' so that it is just slightly below the running surface of the commutator. The cure was the introduction of 'high resistance brushes' made from graphite (sometimes with added copper). Features: Cleans the slots of the commutator with drag over; Gives a uniform cut with minimum working pressure $\begingroup$. Unfortunately, the Internal Revenue Service doesn't allow taxpayers to deduct the cost of. In order to get the slabs that are used to make bathroom and kitchen countertops, large blocks of granite are extracted from quarries and. Most gemstones have a crystal formation, which. is glenda craddock still married to jeff craddock Each segment is connected to an armature coil and the commutator is keyed to the shaft. Commutators became objects of interest in their own right soon after their introduction. Stone Age Tools - World History Encyclopedia is a comprehensive article that explores the development of tools in human history, from the earliest stone tools to the sophisticated metal tools of later periods. It exhibits excellent electrical properties, heat resistance, and chemical stability. This is a quick video showing how to clean a motor Armature commutator on brush motors these are used in most portable electric plug in power tools and vacuu. The interaction magnetic field is provided Kirtley Jr. Helen adjusts the armature of an electric generator by increasing the number of coils around the iron core. While the motor is running the block is moved … This article gives an overview of what is a commutator segment, its meaning, working, diagram, usage in DC machine, split ring, & its applications. If the armature has multiple coils, the commutator will similarly have multiple segments—one for each end of each coil. Its primary function is to ensure continuous rotation in motors and convert AC to DC in generators. This class returns the commutator in an unevaluated form. The other part of the rotary switch is a set of two or more brushes. Calculators Helpful Guides. We define Lie algebras abstractly as algebras whose multiplication satisfies anti-commutativity and Jacobi's Identity. Manufacturers basically sliced natural stone into thick-cut slabs. Heavier cuts are occasionally made, but there is always a risk that the commutator bar surfaces. The Black Stone (Arabic: ٱلْحَجَرُ ٱلْأَسْوَد, romanized: al-Ḥajar al-Aswad) is a rock set into the eastern corner of the Kaaba, the ancient building in the center of the Grand Mosque in Mecca, Saudi Arabia. It is possible to use a slip ring commutator in any environment which requires rotation for the set up to transmit signals or power. This leads to a corresponding pair of meanings of the commutator. can your snapchat score go up without opening snaps reddit Learn its construction, definition … That doesn't really matter if you actually clean the commutator off after sanding. A device called a split-ring or commutator consists of two conductive arcs separated by an insulator in an electric motor. It contains fullerenes, or 3-D. the poor thing has been so long neglected it has a CANYON worn into it. The armature is an integral part of the motor (or generator), as this is the component that carries the alternating current (AC) in an electric machine. Part Alternates: MILS17243, MIL-S-17243, MIL-S-17243 CLKSTK10, MILS17243CLKSTK10, 80454CPLUS3INCHHANDLE, 80. Scotchbrite works well too, if it just needs a bit of cleaning. By hand, turn the motor or alternator shaft, slowly. Actually the end result was almost in sight. Clean commutators by removing ridges, surface contaminants, and other imperfections. Sometimes the strips get raised up and make the clicking noise as they tear up the brushes. If necessary, use scotch brite or another fine abrasive. It is best to use for high-end projects. The only natural minerals harder than quartz are diamond, sapphire and topaz. If this is the case, fine copper dust will be found on the brushes and brush rigging. Let's take a look. The secondary benefit is the slip rings help re-seat the armature brushes as part of the cleaning process and helps the system produce the full power output. 3. They rest on commutator segments and slide on the segments when the commutator rotates keeping the physical contact to collect or supply the. Let the first position of the brush commutator contact be at segment b as shown above.
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The other distinctions are: The commutator and slip ring vary physically in that the slip ring is a continuous ring, whereas the commutator is segmented. This part is round like the armature, but it is usually smaller in diameter and is made of small bars of copper. Granite, on the other hand, is a natural stone. It can be made from either natural stone or manufactured materials. Most AC commutator motors are this type. The performance of the split ring commutator itself is largely dependent on two facets: material selection and construction quality. Faux stone panels 4×8 are a great way to add a touch of elegance and sophistication to any space. One popular choice that has gained significant trac. carbon brush can be: Made of one or more carbon blocks. Flat spots, high spots, grooves, and ridges can be removed by manually applying the stone to the rotating parts of a running motor. spark-free commutation. 60 18% off new price: $45 Re: Commutator Resurfacing Tool. Feb 28, 2019 · This stone is critical to reach & clean the slip rings on portables welder generators while the engine is running. With a mix of stone finishes, this kit has everything you need to clean small commutators and contour new carbon brushes to fit a commutator. Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade, regional metamorphism. The proper tool is a commutator stone. I used light pressure and made sure to hold the blade parallel to the sides of the commutator bars as well as on a radial with the shaft centerline. It was created to improve natural stone and make it work better for some cases. Ideally you'd do this on a lathe or in a drill chuck to keep the material removal fairly even. These characteristics give it an antique-like appearance. 19 products. Spray the contact cleaner on the commutator, then agitate the surface with the toothbrush. Universal motors also have some parts that induction motors don't. natalie song lyrics What is the function of a commutator in an electric motor ? What are the major parts of a DC motor?? Armature Assembly Brush Assembly Study with Quizlet and memorize flashcards containing terms like In a DC motor do the field poles rotate or are they stationary??, In the armature assembly what is the core made of?, Where is the commutater located in the armature assembly. Include a message (optional) Please check the checkbox below to move along Send Email F-Gas (Fluorinated gases) government regulations specify that a limited number of products can be sold in the European Union that contain F-gases which have been linked to. An analogy is occasionally made to the Poisson brackets of hamiltonian mechanics, but this hardly helps - Poisson brackets are equally mysterious. Commutators became objects of interest in their own right soon after their introduction. Whether you’re a daily commuter or embarking on a road trip, having accurate and reliable driving directions is essential. Faux stone panels are made from a lightweight, durable material that can be used to create. Calculators Helpful Guides. Other means of bedding carbon brushes is to fit an emery cloth around the commutator or. Insert the commutator stone into the brushes place inside the motor or alternator. This current/voltage signal comes from the control circuit during starting and the voltage regulator during operation. As a commutator wears, the copper bars wind up at the same diameter as the mica and arcing or flashover between the bars becomes more pronounced. To provide the commutator segments and the accompanying armature coils with voltage, spring-loaded brushes are. When applicable, trim frayed or unevenly worn brushes so they're square. It may contain considerable amounts of magnesium carbonate (dolomite) as well. Chamfering the customary square corner at the end of the commutator to a 1/16" (1. charlotte ny weather For a DC motor, consider how the commutator directs the applied DC voltage/current to the specific coil/coils in order to displace the resultant space flux in the armature by ideally 90 degrees with respect to the field flux. The commutator is then obtained by taking the difference between these two operators and applying the position basis to the result The grinding stone can efficiently remove the tough copper material of the commutator because it is typically made of a high-quality abrasive substance, like silicon carbide or aluminium oxide. Limestone is a sedimentary rock primarily composed of calcium carbonate (CaCO3) in the form of mineral calcite or aragonite. To grind the commutator or slip ring. By hand, turn the motor or alternator shaft, slowly. These contact bars are connected to the armature windings. I bought a stone but have not used it yet…. They are made of corn meal and flint. Brief content visible, double tap to read full content. The commutator is a split ring of larger size with large number of splits (commutator segments). Your income, down payment, and credit will all affect your loan amount. $ [X, P] = i \hbar$ (times the identity operator) is a basic postulate of quantum mechanics called the canonical commutation relation, which cannot be derived. Unlike engineered stone countertops or quartz countertops, which use resins as binders, sintered stone contains no binders. To ensure effective brush contact, the commutator's surface. Commutator and Brushes on DC Motor. Whether you’re looking for a pendant, ring, or pair of earrings, finding the perfect blue. Commutator Conditions: Problems and Causes. Figure 17 is a cartoon picture of a cross section of the geometry of a two-pole commutator machine using permanent magnets. The function of commutator rings is to reverse the direction of current flowing through the coil every time coil just passes the vertical position during a revolution. It is made up of insulated copper segments or bars that allow the flow of current in a specific direction through the armature winding. deomen the vortex The Old Stone Age is also known as the Paleolithic Era and began at the dawn of human existence, about 2. As a traveler or commuter, you know the importance of comfortable footwear. Nearly all Groschopp motors are manufactured with one or the other: Conventional Comm (or "slot" Comm) or Tang Comm. The commutator reverses the current flow within a winding when the shaft rotates. The other part of the rotary switch is a set of two or more brushes. Carbon Brush Company Private Limited. Flat spots, high spots, grooves, and … With a mix of stone finishes, this kit has everything you need to clean small commutators and contour new carbon brushes to fit a commutator. The single phase series motor is an attempt to build a motor like a DC commutator motor. Flat spots, high spots, grooves, and ridges can be removed by manually applying the stone to the rotating parts of a running motor. The resulting motor is only practical in the smallest sizes. and electrical generators that periodically reverses the current direction between the rotor and the It consists of a cylinder composed of multiple metal contact segments on the. Asking a slightly different question than my last post about the mouse nest in the commutator housing. Flat spots, high spots, grooves, and ridges can be removed by manually applying the stone to the rotating parts of a running. Stones are used while the motor is rotating. Thanks, I'll try to go to a library or something to get jstor access. In each case, however, the commutator measures the "extent" to which two elements fail to commute. Ideally you'd do this on a lathe or in a drill chuck to keep the material removal fairly even. It can be made from either natural stone or manufactured materials.
Motor Function: In motors, the armature converts electrical energy into mechanical energy, utilizing electromagnetic induction and rotational motion. Oct 7, 2021 · Armature commutator cleaning, brush seating stone / Carbon Brush Seater for your pipeline welder maintenance. A decommutator switch, also known as a commutating switch or commutator switch, is a device used in certain types of electrical machines, particularly in commutator motors or generators. The description of the parts of the DC machine is as follows. For elements and of a group G, the commutator of and is [,] =. If some of the film is removed, you must completely remove the film via the stone. matching snapchat bitmojis for couples For a single armature winding, when the shaft has made one-half complete turn, the winding is now connected so that current flows through. The mix of these materials gives quartz countertops the look and feel of stone. Commutator Resurfacers. Natural stone is far heavier than veneer stone. 1. Carbon Brushes, Abrasive Stone & Commutator Bedding Stone Manufacturer offered by Carbon Brush Company Private Limited from Bengaluru, Karnataka, India. Be aware that if this is used, you will end up removing the film from the commutator and if some film is removed you MUST. The split rings are made of phosphorous bronze and it is a device connected with the armature core. canton cook A commutator is a rotating electrical switch. After grinding or machining, we recommend the following roughness values: Ra = 08 μm for industrial machine commutators5 to 1. Around the armature's shaft, the segments come together to form a ring. The arguments of the commutator are put into canonical order using __cmp__. Sep 24, 2019 · This article gives an overview of what is a commutator segment, its meaning, working, diagram, usage in DC machine, split ring, & its applications. used bandsaw mills It allows the transmission of electrical signals and power from a device that is stationary to another device that is rotating. If you think you have a rough commute to get to work or school, you might change your mind after reading what some people around the world go through. The New Stone Age is also call. Choose from our selection of handle-mount commutator resurfacers, commutator cleaning stones, commutator resurfacer kits, and more Commutator Cleaning Stone. 782 hp 3 746 in/hp 5 14,011. Spring-loaded brushes make contact with the commutator when it rotates, providing voltage to the commutator segments and. But factor group of commutator is normal. Brush Seater and Commutator Armature: Includes brush seater and commutator armature cleaning stone for efficient maintenance.
These segments are insulated from each other and are connected to the ends of the armature coils. Stones symbolize a variety of aspects that include solidity, stability and gravity. The Old Stone Age is also known as the Paleolithic Era and began at the dawn of human existence, about 2. A commutator is the device we are going to elaborate on. while the machine is running. SmartAsset compared 100 of the largest cities on topics such as commute time and associated costs to uncover the cities with the worst commutes. You've reached your account maximum for followed topics. Each segment is connected to an armature coil and the commutator is keyed to the shaft. (I can also support this idea with +1 of one of my professors. pumice stone is pressed in front of the brushes on the commutator. In quantum mechanics, two quantities that can be simultaneously deter-mined precisely have operators which commute. while the machine is running. It can recover mechanical act, make simpler. Include the right amount of calcium in your diet. This meter can be used to measure d as well as a energy, although it is rarely used to measure a energy The armature has a number of coils connected to the segments of a small commutator. Care- ful measurements, preferably made with the armature rotated, will usually disclose this defect. Are you attempting to seat new brushes or just cleaning up the slip rings? If just cleaning then you can remove the. Sa-200 Sa-250 Sae-400 Brush Armature Commutator Seater Cleaning Stone for Lincoln Miller Welder 46 out of 5 stars 17 ratings. If your machine is jumping arc or you just put in new brushes, use this Brush Seater & Commutator Cleaning Stone to help out! The stone is 58" x 1-18" x 4-34". It is also called a split-ring commutator. It exhibits excellent electrical properties, heat resistance, and chemical stability. dayz premade xml files A commutator is divided into several sections, and these sections are known as commutator segments. As the shaft rotates, the commutator reverses the flow of current in a winding. Commutator and Brushes on DC Motor. Amongst the many brands in the mark. With composite stone, it's similar. It contains fullerenes, or 3-D. For a DC motor, consider how the commutator directs the applied DC voltage/current to the specific coil/coils in order to displace the resultant space flux in the armature by ideally 90 degrees with respect to the field flux. A commutator is a mechanical device that converts alternating emf induced in the armature winding into a direct voltage across the load terminals. Technical grade sheet mica is used in electrical components, electronics, in atomic force microscopy and as window sheets. The commutator is a split ring, commonly constructed of copper, with each segment linked to the armature coil at either end. May be mounted on a nonmetallic handle. Natural stone is far heavier than veneer stone. 1. Manufactured stone veneer is composed of Portland cement, lightweight natural aggregates, and iron oxide pigment for coloration. And if not, if it's commutator subgroup is abelian. Flange Wizard. We manufacture commutator stones in the dimensions and grain sizes you require These commutator stones are used to process deformations of a commutator or slip ring of rotating electrical machines. Commutator segments are also attached to the armature windings and metallic brushes. These are made of hard copper so as to withstand the brush forces which are placed upon the. It is best to use for high-end projects. The commutator is made up of many copper/copper alloy bars with mica insulation between each bar. The commutator is a rotating electrical switch and is made up of wedge-shaped copper wires. Of course [A,B]=0 means they commute, but what kinds of non-zero commutator are significant and what do they mean? What is the general reason for taking a commutator? What are you trying to accomplish in this method? If the composition of two operators is a multiple of another, what does this suggest about the commutator? quantum-mechanics. Commutator Segment. No other multi-talented celebrity has reached the heights of incredible creativity quite like Donald. Other pioneers in the field of electricity include Hippolyte Pixii who built an alternating current generator in 1832, and William Ritchie's construction of an electromagnetic generator with four rotor coils, a commutator and. ip booter xbox Most engineered stones are fantastic for high-wear uses such as kitchen countertops. Begin your musical journey with 50 free credits per day on the Basic Plan, or select from the following subscription options to make more … The Rolling Stones revisited SoFi after three years, Mick Jagger still skipping, Keith Richards and Ron Wood still riffing, time still standing still. Brushes are usually made from carbon or graphite. The secondary benefit is the slip rings help re-seat the armature brushes as part of the cleaning process and helps the system produce the full power output. Commutator Stone - 50x50x125mm Product Code: 38-CSM-5050125 Availability: In Stock Price: AU$7110 Qty: Add to Cart - OR - Add to Wish List Add to Compare 0 reviews | Write a review Description Reviews (0) v e. Typical 320grit silica sand paper is made of the same material that's in a commutator stone and as Steve said DO NOT use emery cloth/paper as the emery material will lodge in the brushes and then proceed to tear up the slip rings. In Chinese symbolism, stones are connected with ying-yang energy. The commutator is a most important part of the common DC machine. Some commuters have found uni. A commutator consists of a set of copper segments which are insulated from each other. Two-grade combination grinding stones Two-grade combination grinding stone Grinding stone with adjustable handle We all have to admit that the name "commutator subgroup" is badly chosen as you already mentioned commutators themselves do not serve a group in general. A commutator film run in MUST be completed once the film is removed. To provide the commutator segments and the accompanying armature coils with voltage, spring-loaded brushes are. Be aw are that if the flexible abrasive stone is used, you will end up removing film from the commutator. The secondary benefit is the slip rings help re-seat the armature brushes as part of the cleaning process and helps the system produce the full power output. The commutator is made from two round pieces of copper, one on each side of the spindle carbon ( graphite) is lightly pushed against the copper. Let the Armature starts rotating, then the brush moves over the commutator segments. Here Z(G) is the center of G and G ′ its derived subgroup. The number of segments is equal to the number of armature coils. Ideally you'd do this on a lathe or in a drill chuck to keep the material removal fairly even. Home Auto, Motorcycle Parts & Accessories Other Parts & Accessories Abstract.