What is some labor used in making bicycles?
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hard work\ndetermination\nand actually wanting to feel like you have accomplished something in your life no matter how small
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You start with a cast iron casting, a forged steel blank or a steel billet.\n\nThe casting or forged blank will be about the correct shape and will require some machining to form the bearing surfaces and the ends and remove "flash" material.\n\nA billet crank is entirely machined from a block of metal.  This is the most expensive and suitable only for top level racing.\n\nOil passages are drilled into the crank.\n\nThe crank is balanced by spinning the finished product.  Material is removed from the counterweight portion of the crank for balancing.
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Mechanical or material science engineering, depending on what aspect of it you want to work on.  Mechanical engineers work on the nozzles and alignment.  Material science engineers work on making the material better and cheaper.  At Washington State University a few years back, they had a team working on stereo lithography who found a way to add fibers, making the parts effectively useful as prototypes, even in assemblies under load.\n\nComputer science is probably another one since folks are always looking to improve the code and make it easier and cheaper to use.
222182
the frame is the heart of any bike, the fork attaches to it with a headset, the fork and frame together are called a frameset. the frame can be made of carbon, aluminum, titanium, or steel ( uslly a chromoly alloy ), from with it you attached the wheelset, the crankset, the stem, the handlebar, the seatpost, the seat, the rear cluster, the derailurs ( front and rear ), the pedals, the shifters, the brakeset.
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It's either cast (the steel is molten and poured into a mold, like a Bundt cake), or extruded.  All by machine.
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You can make any simple machine having fulcrum, load and effort or u can even make a pulley.(These r very cheap and easy to make)\n\nFor ur project on universe u can get information from any encyclopedia or search in net.
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Hand crafted will mean just that, the frame will have been assembled by hand by a craftsman.  This is the norm for higher quality framesets.  On the other hand, it might mean that it has just been assembled by hand, although as this applies to all bikes.......\n\nCustom build is something different.  A custom builder will make a bike specifically for you, having taken your measurements he will build the frame and assemble the bike to your requirements.\n\nMy "best" bike is handmade, not custom made.  The shop where I bought it ordered a "standard" frame of an appropriate size (with the maker's name on it) and then set up the bars, saddle etc to suit me.  \n\nHope this has helped you.
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A good site is Weight Weenies.  Shows the weight of many bicycle parts.
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What a piece of work, eh?\n\n2 small front wheels, 2 O-ring rear wheels that encircle the door entry.
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made on a machine, called a blow mold
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Extrusion.. There is a mold or tooling which the molten plastic is forced through to produce a continuous shape.. Extrusion is used to make Plastic window frames, plastic bags, guttering, plastic tubing etc.\nInjection.\nThere is a closed mold or tool which molten plastic is injected into, solidified and then removed.\nFor example the fittings that you use to fix your guttering to your roof, the dashboard of your car, , the soles of your shoes.. I.e. complex shapes that require dimensions in X, Y and Z axes whereas the Extruded only needs the X and Y axes.
484424
Hammer, Anvil, Stirrup.
642012
You are moving around a couple hundred pound machine, so you are using all kinds of muscle to move the bike from side to side, and pulling up on the front end, or pushing it down. You also use your stomach muscles to do all this, it's great exercise, and always gets your heart pumping.
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Bike parts are almost like any other consumer products. There are many requirements to consider, like strength, safety, performance, appearance, cost, etc.\n\nYou start with the raw materials. Metals are forged, cast, stamped or drawn into desired shapes. Carbon fibre structures are layered according to desired strength requirements. Plastic & rubber parts are made by injection moulding.\nSome metal parts are then hardened, either by heat treatment or by aging. Then they might have to be machined to get the final shape.\nParts also undergo surface treatment processes to make it look good. Some are painted, polished, anodized, blackened, electroplated, etc. Lastly you have printing processes - to put the logos and the designs on the parts. This is either by pad printing, silk screen or simply using stickers. A growing trend is using a laser to burn the designs onto the parts.\n\nThe processes the parts go through depend largely on the selling price of the product. More processes (two-tone colours, accurate machining, intricate decorative designs, etc.) results in higher cost, and therefore higher selling price. Of course, higher price generally means higher quality.
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Interbike would be the place to be if you want to talk to all the key players in the US bike industry - manufacturers, importers, the big brands, bike shop owners, magazine writers, enthusiasts.\n\nIt's in the early fall so you missed it this year but that gives you time to get on Amazon and look for books about making money from your inventions - there are lots of good titles that talk about how to protect your idea, approach and negotiate with manufacturers / partners etc.  I strongly suggest you do your research and plan carefully.\n\nAlso... understand who your target market is. Even though it looks like a cutting edge, high-tech market, most cyclists who spend $thousands on a bike are very sensitive to fashion and "what's cool".  This is the reason that many arguably superior designs - such as faired recumbents for example - are still only niche products.\n\nThere are a few trade organizations, but be sure to subscribe to "Bicycle Retailer and Industry News" aka "BRAIN" it's the main business journal for the US bike biz. \n\nGood luck,\nScott\n\np.s. you are familiar with your competition and what has come before, right?  50+mph bikes have been around for many years.
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GO TO WWW.GLOBALSOURCES.COM AND SEARCH UNDER BICYCLES.
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Those in the Millwright union work on heavy machinery, generally stationary. Like the kind of machinery you would find in power plants or manufacturing facilities. Huge motors or generators, shafts no human could lift, piping and valves.