Member postings for Chris TickTock

Thanks Guys the consensus is ArcEurotrade or Tracy Tools...thanks again.

Chris

OK Guys basic help needed and want to get it right. So I wish to face off the end of this hex bar. My inclination is to turn the cutter a few degrees and take fine cuts. If I am right how many degrees is usual.I am using a cutter which my book states can be used to face as well.

regards

Chris

Hi, Any one recommend a good supplier in terms of price and quality of HSS 1/4 inch blanks for lgrinding into.athe cutters?

Regards

Chris

Hi Guys thanks for all the replies. My thoughts are ; I have only come across references to the Rockwell scale in terms of how hard it may be to machine or how hard it may become after heat treatment. Therefore it can be used as an indicator of hardness which does not mean in many cases the best suited material.

Regards

Chris

The question I would like answering is exactly what is the use for me as a home machinist in a hardness scale (lets assume we are referring to the Rockwell Scale). For example if a metal can be heat treated to a higher HRC is this of value in relation to another metal yielding less. At first this question seems simplistic but many factors could arise so its a question I would be interested in anyone answering as there's always something you don't know.

Regards

Chris

Hi, what would be very useful is for me to be pointed in the direction of a table showing the potential hardness that can be achieved with the various metals we would commonly use in home machining. I believe this is called the Rockwell index but stand to be corrected.

Regards

Chris

Thanks guys and sorry about my still somewhat confusion as to Uk and American jargon but Jason is right I have I read amongst other things American books so some loss in translation at this stage inevitable. moving on to metals on EBAY I note hex bar is available as free cutting steel now I have looked up this and it means what it says but would I need to know what grade of free cutting it is and also if it is possible to harden such.

While I am highlighting my deficiencies also in the I use American book is a project requiring '5/16 - 24 x 0.75 long hex end bolt. Would i be right this is 5/16 thread but what does the 24 mean?

Regards

Chris

Hi Jason, I already changed my mind from using mild steel. Now going the 6mm silver steel route for entire thing. Like your idea. But questions in relation to your method.

1. Why use silver steel for end piece would o1 be as hard when hardened? Can't see reason for silver steel other than needs to fit exactly into drilled hole.

2. Would loctite hold as it will be subjected to shock? Any recommendation as to which loctite??

Just got new (used for £15) book Table Top Machining by Joe Martin at face value really good.

Regards

Chris

Hi Guys well unless I've missed something high carbon hex steel is not easy to source in Uk especially in small quantities. So my options are;

1.Just use round in stead of hex.

2.Do it in mild steel just for the exercise

3. Find another project

4. Use an old suitable hex alum key after annealing

I am tempted to do it in mild steel as it is the practice that is paramount and therefore no real waste.

Regards

Chris

Will investigate...thanks Jim.

Great reply Dave

Chris

Thanks Andrew the metal required is for a learning project (to make a centre punch) nothing to do with clocks at this point. You are absolutely right on EN19 being an alloy steel. I have posted in reply to a very old post asking for a supplier of 1/4 inch hex carbon steel for this project that I suspect the original poster was in possession of. The project listed 4130 as the required metal or any other high carbon metal, hence my classification error now noted, none. Regardless of all can't find suitable metal.

Regards

Chris

Well funny enough I too want just over 6 inches of high carbon steel in 1/4 inch hex format to make a centre punch. Recommended metal is 4130 which is approx EN19 anyone suggest a supplier or anyone got anything surplus to requirements?

(We are following a project in a book in case you are curious.)

Regards

Chris

Yes and there on your link the equivalent standard was readily found Mark:

Thanks mark just discovered looking under wrong standard o2 comes under sae/aisa and not British on the table I was looking at. But surely there is a BS standard equivalent. will look at your site ..cheers.

Chris

Hi, I am currently lining up a few projects for my Sherline lathe simply to learn basic skills. One project requires aisa 4130 steel which is I think is equivalent but not exactly to EN19. Any high carbon steel will do but my question is when I look up an international equivalent steel table for engineering steels I see nothing about 01 tool steel almost certainly as I don't know what i am looking for. Does 01 steel come under engineering steel and what code does it go under in the UK?Does silver steel have a unique code distinct from tool steel?

regards

Chris

Thanks guys you have given me enough to work on.

Regards

Chris