New arrival 5 sets bicycle chainwheel 7075 aluminum alloy blots bike Crankset Screws cycling nuts | Спорт и развлечения

New arrival 5 sets bicycle chainwheel 7075 aluminum alloy blots bike Crankset Screws cycling nuts | Спорт и

Caution: The  hardness of 7075 aluminum is better than ordinary aluminum.  However it is weaker than steel screws. So please do not wring the 7075 aluminum bolts like the steel bolts. Be tender. I promise we have tested them.   I think you could know a little knowledge about the 7075 aluminum before placing the order.

If you do mind it, please do not place the order. Thanks.

What is 7075 aluminum alloy?

Aluminium alloy 7075 is an aluminium alloy, with zinc as the primary alloying element. It is strong, with a strength comparable to many steels, and has good fatigue strength and average machinability, but has less resistance to corrosion than many other Al alloys. Its relatively high cost limits its use to applications where cheaper alloys are not suitable.

7075 aluminum alloy's composition roughly includes 5.6–6.1% zinc, 2.1–2.5% magnesium, 1.2–1.6% copper, and less than half a percent of silicon, iron, manganese, titanium, chromium, and other metals. It is produced in many tempers, some of which are 7075-0, 7075-T6, 7075-T651.

    USES

  7000 series alloys such as 7075 are often used in transport applications, including marine, automotive and aviation, due to their high strength-to-density ratio.^[2][9] Their strength and light weight is also desirable in other fields. Rock climbing equipment, bicycle components, inlineskating-frames and hang glider airframes are commonly made from 7075 aluminium alloy. Hobby grade RC models commonly use 7075 and 6061 for chassis plates. One interesting use for 7075 is in the manufacture ofM16 rifles for the American military. In particular high quality M16 rifle lower and upper receivers as well as extension tubes are typically made from 7075-T6 alloy. Desert Tactical Arms and French armament company PGM use it for their precision rifles. It is also commonly used in shafts for lacrosse sticks, such as the STX sabre, and camping knife and fork sets.

Due to its high strength, low density, thermal properties and its ability to be highly polished, 7075 is widely used in mold tool manufacture. This alloy has been further refined into other 7000 series alloys for this application, namely 7050 and 7020.

This is the detailed size of the bolts

 These are the close-up features for the bolts and mounted on the crankset.

These are the some little items or accessories for the cable and frame. If you are interest in it, please   'click'   the picture. You will know the detailed information about the item. Thanks.

if you are interest in the other little items for the bicycles, please link this. 

http:/store/group/bicycle-accessories/233959_257264225.html

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The price will be lower, if the quantity you order is high. I am the manufacturer of  bicycle, motorcycle, E-bike, car, truck disc brake pads. Regarding to the Express(DHL,UPS, FEDEX, EMS, TNT), we could choose one as you like.

  Regarding to the safty and swift transportation, i sincerely suggest choosing delivery of DHL