Fwiw: the Simmons V4s are easy to split from their hoops without splitting the halves apart.
if you put a socket extension with the socket on the end over the nut, then just give the extension a good crack, they come straight off, also if you hold it with anti clockwise force on the extension while you hit it, you can do the rest with your fingers after one crack with the hammer, get a good rhythm going you can have the wheel tripped in 2 mins.
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Fwiw: the Simmons V4s are easy to split from their hoops without splitting the halves apart.
All steels work harden to a point. Thats why you should torque the bolts accordingly. I think you mean 12.9 (not 12.2) other grades range from 4.6, 6.6, 8.8, 10.9, 12.9. The first number represents the ultimate tensile strength of the bolt, 400 Mpa, 800 Mpa or 1200 Mpa respectively. The second number represents the point at which the bolt will permanently stretch. (Officially, the 0.2% proof load stress). A 4.6 bolt permanently stretches at 60% of its ultimate, an 8.8 at 80% and a 12.9 at 90%. (Mpa=N/mm2)
The properties are actually quite similar in the High Tensile 8.8 and Stainless Steel A4-80 (grade marked on bolt head).
8.8 Grade High Tensile Steel has Tensile Strength 800N/mm2 and Yield Strength 640N/mm2
A4-80 Grade 316 Stainless also has Tensile Strength 800N/mm2 and Yield Strength 600N/mm2
(A2-70 Grade 302 Stainless has slightly lower Tensile Strength 700N/mm2 and Yield Stength 450N/mm2 is more like a 6.6 grade bolt due to it's lower Yield)
Last edited by Kid Karola; 13th October 2009 at 10:41 PM.
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