Very nice contrast in this image, I was always told for a B&W image you can't just have shades of grey, you have to have defined black and white in the finished result.
And you have done this well.
I think it works with the scene, strong subject with strong shade contrasts.
I have seen some good photo subjects that are well composed but then ruined by converting to B&W .....because the image ends up being an un-contrasted 50 shades of grey, which is completely in un-appealing to the eye!
I know in competition rules it says not to do and PP but I think if I was to do anything to this image it would be drop that large Rounded-A shaped bracket out of focus, as my eye is taken away from the sharp blades to look at that.
I would personally want to accentuate the sharpness of those blades which are the main focus area of the image.
Can I ask what the machine is? Is it some sort of grinder or printing machine?