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Alloy Axle Nuts
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Taps and dies are tools used for cutting threads while usually sold in sets they are in fact individual tools. A tap is which looks like a bolt if used for making the female thread (nut) and the die which resembles a nut is used to make the male thread (bolt).
Usually made from HSS (high speed steel) alloy steel and are extremely robust and have very hard cutting edges. This is needed as both the tap and dies have threads like those on nuts and bolts that are used to bore threads in smooth metal. A tap screws into a hole and makes it in to a threaded hole and a die puts a thread in to smooth shafts.
These tools are most commonly used to repair threads that have been striped or crossed.
Using a Tap
When using a tap care must be taken not to break the tap off mid repair. Due to the type of steel and heat treatment used to get the hard cutting edge taps can be quite brittle. If a piece of the tap id broken off in a hole it can be extremely hard to remove it and as the tap will probably harder that the average drill bit even drilling it out is not always an option.
However if used properly you shouldn't have any problems. Usually they get broken by bending not twisting and in most sets a "T" handle will be supplied allowing you to easily turn the tap without bending it. Generally most problems are caused by trying to turn a tap with an inappropriate tool like mole pliers.
When preparing to you a tap to create a thread its essential that you drill the correct size hole for the tap that you are using to small and will be very hard to cut the thread and you will likely break the tap and too large and the thread will not be cut deep enough and easily striped.
Tap Drill Chart
Tap Size mm | Drill Size mm
2.3 1.9
2.6 2.1
3.0 2.5
3.5 2.9
4.0 3.3
4.5 3.8
5.0 4.2
6.0 5.0
7.0 6.0
8.0 6.8
9.0 7.9
10.0 8.5
11.0 9.5
12.0 10.2
Once you have the correct size hole using the "T" handles turn the tap in to the hole. As the tap cuts strips of metal will be pushed out of the flutes (grooves). To prevent the flutes becoming clogged up, this is done by turning the tap backwards and braking the metal strips up. Ideally you should turn the tap one half turn or until you feel increased resistance then turn back a quarter turn. On very deep holes it would be advisable to completely withdraw the tap from time to time.
It is also advisable to use some king of cutting fluid you can buy special cutting fluid but if you are using the tap but hand any general oil will do the job.
Using a Die
To repair a crossed threads on a bolt simply select the die from your set that is an exact fit for the bolt. It's advisable to apply a drop of oil to the bolt and run the die down the bolt. If the die gets tight and you feel high resistance just run the die back up the bolt and start again.
To create threads on a smooth shaft select a die that just smaller than the size of the shaft and a couple of drops of oil on the die blades and work the die down the shaft. As with the tap a half turn should be followed by a quarter turn back to prevent the die from becoming clogged.
For a comprehensive range of tap and die sets see Tap and Die sets.
Screws, Bolts And Nuts Hold Industries Together!
Bolts, nuts and screws are basic hardware items used in every industry in need of fasteners. From furniture crafting and manufacturing to construction and building, every industrial application needs to use these important tools just to hold everything in place.
Screws, nuts and bolts are fasteners used to mechanically connect things together. A fastener may be defined as a mechanical device that holds two or more components in position. Ever since seeing the result of fastening the axle to the wheel, humans have been using fasteners to make lives easier. Most fasteners have threads as part of their design as can be seen in screws, nuts and bolts. Fasteners are produced primarily from ferrous metals such as alloy steels and carbon; they are available in brass, stainless steel, and copper. The process of making them involves rods, bars or wires which are cut to length and threaded.
Today we have reached a stage where a nut from one company and a bolt from another can fit perfectly together. They come in standard and Metric sizes for specific applications to fulfill wide variety of industry needs. Stronger, lighter and easy-to-use are some of the obstacles the fastener industry is facing and successfully managing. Laptop computers use these screws, nuts and bolts. Self-locking and self-sealing screws, nuts, bolts and threaded inserts have also become common. The latest challenge that we face in this day and age is of course, to produce environment friendly fasteners which do not use carcinogenic plating such as cadmium.
Custom fasteners are also used in holding all types of building materials together. A good fastener must be sturdy and durable, the right grade, so that they can take the stress it is made for. Titanium is custom made for the airplane industry because it is strong and lightweight. The military also uses customized fasteners and is specified by the government specifications and guidelines for the application.
About the Author
This article was written by GatewayFasteners.com an online leader for Nuts and Bolts sales.
Torque setting for rear wheel nut on a 2008 Aprilia RSVR please !!?
I need to adjust my chain, thus need the torque setting for the rear wheel nut / axle spindle. Its a 2008 Aprilia RSV ( NOT the Factory model ie has cast alloy wheels not forged ). Many thanks, safe riding peeps.
http://www.apriliaforum.com/techtips/1000/torquespec.htm
120Nm
Good luck and ride safe.
Loose Tires Are Very Dangerous
Here at the Injuryboard , members have written about the need to check the lug nuts on your wheels after you buy tires. It's been pointed out : If you get new tires , you should within a few days return to the garage to have the lug nuts re-tightened. That’s especially true if you have alloy or aluminum wheels. Under-tightening, working loose, failing to replace or over-tightening are all ...
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