Shimano Freehub Body

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Shimano Freehub Body

Once the clutch was a mechanism that was screwed to the threads of the hub and covered the rear gear and pedaling lmeccanismo that allows free movement of the wheel of the bike (and, in fact, can stop pedaling without locking the drive wheel) . Today, the freewheel become an integral part of the hub so that the mechanism of rotation. The sprockets are installed on there, one by one or in groups of two or three depending on the model. The concept of free-wheeling was a very important development for the modern bicycle because it has allowed the use of the gearbox and the change in the relationship without getting off the bike because the mechanism of transmission can be stopped while the bicycle in motion . the freewheel consists of a bodice onto which the wheels of different sizes. The freehub body is grafted onto the hub through a system of ratchets allow him to turn in one direction. In this way, guaranteed to drive when you push on the pedals but the cranks are free to stop moving while the bicycle moves forward. Many manufacturers of hubs have a lot easier removing the freewheel. In this way you can quickly assemble a version for Campagnolo or shimano freehub body for that which are the two systems of reference between the road bikes. In these three images here as it is removed from the bodice of the freewheel hub. In the picture below are the most obvious ratchets that allow the operation of the freewheel in one direction. . .
Today, no new material to thousands of dollars but rather a small "tutorial" for dismantling the hubs shimano freehub body 7700 series, 6500, 5500. The hub is an example taken Ultegra 6500 that has a bunch of miles under his belt since the wheel to three and a half years, however this method is also valid for the dura-ace hubs and 105, may also be Tiagra and Sora but I am not. Notice the rust on the shimano freehub body that has been changed yet again. Rust is caused by water seeping between the gears of the cassette shimano freehub body and outings in the rain. This water is often a long time there and eventually corrode the body. Ideally, remove the tape to wipe the body after release. Put the two keys to cones on both sides of the hub on the outside and unscrew the nuts while identifying the order nut / washer / nut cons. Normally, the drive side nut is unscrewed and the freewheel side remains in place but the reverse could occur, it does not matter, it does not change anything except removing the need s' hold the nut drive side when I mention the nut on the drive side for example. Turn the wheel on the ground horizontally, and place a screwdriver into the hole provided for passing the axis of a skewer. This screwdriver is used to prevent balls from falling because the axis is not yet in place and helps them position themselves in their homes. Gently remove the screwdriver because the balls run off easily and place the axis (and the nut / nut cons who has not removed), afterwards put the nine balls remaining on the other side;. either you put thick grease for the winter, you "stuff" the fat beads on the opposite side (the ball stick and then do save more), turn the wheel and pull the pin to put grease on the ball freewheel side, replace the shaft, tighten the nut on the opposite side, place the washer and tighten the nut cons. Remains the setting, see step 7. or you want a ball that spins like a needle, thread the nut on the opposite side but not fully, the ideal is to leave a day or two centimeters between the nut and the hub body. Spray oil bearing (teflon if possible) on the ball and raceway on both sides. Tighten the nut to make it against the balls, put the washer and tighten the nut and cons we go for the setting!. The setting of the game is simple: if you tighten the nut too much against the balls, it does not rotate or it goes wrong, if you do not tighten enough, there the game must therefore find a compromise and then tighten the cons nut on the nut. I advise you to adjust the bearing tight (small notches when you turn the ball by hand) because when tightening the nut against the nut, the ball tends to loosen. This tutorial is of course also valid for the front wheel, the only difference is that there is no freewheel. You can use these HTML tags and attributes:. . .
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