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What is Blackening? Is it a Chemiacl Treatment? If so could you please provide me the details such as the chemical to use, base materials that can be blackened, microns of depth possible to imbibe the blackening, possibility of other colourings, etc Ramu

What is Blackening? Is it a chemical treatment? If so what is the chemical to use and to what microns of depth the blackening can be done to the base material. What are the base materials can be blackened? What are the preparatory operations to do before the chemical treatment? Any other...

What is the chemical composition of EN 24 and in which standard it comes under? Is it a prehardened material or we have to harden it after preliminary machining if required?

What is meant by prehardened material, and what is the range of prehardness HRC?. How is the machinability of prehardened material?

Could anyone please recommands a good book on Upsetting, a type of cold forging. I live in Bangalore India.

What is the most suitable material other than cast iron, for manufacturing Cams for motion control in autolathes? Can we use OHNS or EN24 for the same?. If it is so, which is the better material and why?

what is the difference between pure brass and 70/30 brass

what is the general thread rolling die making material? for stainless steel screw is there any special material is required for manufacturing rolling die. if so what is it?

what is the general wire diameter tolerance for making screws? how to calculate the blank length for screws?

how to thread roll with indentation of some length, at the middle portion of a screw

how to make half thread screws for those threading begin at a predetermined distance from the bottom of the screw head?

how to select the steel grade for screws making? how these steels are classified as grades 1,2,3,4,1A,2A,3A? what is the use specific use of these grades?

is it possible to make different lengths of wood screws using the same thread rolling die?

screw making wire diameter how to select

plastic use screws: types,uses &making methods. please explain

wood screws of different lengths from a single 2blow die. is it possible to make.

taptite screws: types,uses and making methods. kindly explain.

We are looking for Screw heading die and Thread rolling die manufacturers in India, so that we can order those dies to make different types of screws here in indonesia. Since we are basically Indians,we prefer the locality of Indian origin companies for quick and easy business contacts.