Shafts lenght vs diameter 8mm x 500mm ? November 01, 2019 05:23AM |
Registered: 6 years ago Posts: 145 |
Re: Shafts lenght vs diameter 8mm x 500mm ? November 02, 2019 07:29PM |
Registered: 10 years ago Posts: 239 |
Re: Shafts lenght vs diameter 8mm x 500mm ? November 03, 2019 04:06AM |
Admin Registered: 11 years ago Posts: 3,096 |
Re: Shafts lenght vs diameter 8mm x 500mm ? November 03, 2019 06:29AM |
Registered: 7 years ago Posts: 1,007 |
Quote
Ohmarinus
Not all shafts are the same. I have Chinesium 8mm rods that are chrome-hardened and they bend slightly under stress. At the other end I have the same type of rod that was manufactured in the Netherlands and these are way harder to cut and bend way less. So there are many factors at play here, such as the thickness/deepness of the hardened layer.
Re: Shafts lenght vs diameter 8mm x 500mm ? November 03, 2019 09:03AM |
Admin Registered: 11 years ago Posts: 3,096 |
Quote
MKSA
Quote
Ohmarinus
Not all shafts are the same. I have Chinesium 8mm rods that are chrome-hardened and they bend slightly under stress. At the other end I have the same type of rod that was manufactured in the Netherlands and these are way harder to cut and bend way less. So there are many factors at play here, such as the thickness/deepness of the hardened layer.
In fact not much less, the modulus of elasticity of low carbon is only a few % less than hardened steel. A common mistake.
If deflection calculations don't mean much to aamcle , he can simply measure it with weight close to what he plans to use as moving part.
But a 8mm X 500m is likely to bend just by glancing down at it
Re: Shafts lenght vs diameter 8mm x 500mm ? November 03, 2019 12:07PM |
Registered: 7 years ago Posts: 1,007 |
Quote
Ohmarinus
Quote
MKSA
Quote
Ohmarinus
Not all shafts are the same. I have Chinesium 8mm rods that are chrome-hardened and they bend slightly under stress. At the other end I have the same type of rod that was manufactured in the Netherlands and these are way harder to cut and bend way less. So there are many factors at play here, such as the thickness/deepness of the hardened layer.
In fact not much less, the modulus of elasticity of low carbon is only a few % less than hardened steel. A common mistake.
If deflection calculations don't mean much to aamcle , he can simply measure it with weight close to what he plans to use as moving part.
But a 8mm X 500m is likely to bend just by glancing down at it
Why is it a mistake if I have held a real world example in my hands? I think you should take into account the hardchromed part as well.