Material to select for manufacturing blades of areca nut cutting machine

A

abhishek.sopariwala

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Nov 1, 2014
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Hello everybody,

My name is Abhishek Sopariwala and I am from India (Mumbai). I am self employed and I design special purpose machines for my clients. I am currently designing areca nut cutting machine and I would like to please get some view or suggestions of what materials can be used to design the blades.

My constraint is that I need to use only steels that have high wear strength and hold the edge for good amount of time (at least for 3 months before client brings it for resharpening). The final output of the machines would be 50kgs/hr, and working for 8hrs a day. Some of the materials are not available in India as far as my knowledge goes, but please do correct me if I am wrong.

I am mentioning the material options below, please suggest me or correct me on the materials that I have selected

(1)EN42 (2)EN45A (3)EN47 (4)CS80

I am more interested in using either (1)S35VN or (2)CPMM4, but I doubt if these metals are available in India.

Please put some suggestions in. Hope you will do the needful. Thanking you.

Regards,
Abhishek Sopariwala.
 
Well, I expect you will see very few replies . I just don't believe there are many if any makers here that have made blades to cut those aerca nuts. You may have to just use your previous experience to help you decide . Frank
 
CPM M4 would be promising, but it may not be available in your location.

M2, which is commonly used for drill bits and endmills and saw teeth, might be a good substitute.

I've used D2 in long wear industrial cutting applications with users getting 250,000 cuts.

Whatever material you choose, the heat treat is at least as important as the material. And geometry is also critical.
 
PT Doc said:
m2 and D2?
Click to expand...

Oh yeah man, D2 is very frequently the ticket for longevity cutting applications.

My shop makes tons of non-knife related stuff. Much of it is for the fiber optics industry. When it comes to the materials I use for that industry, cost is no object, I spare no expense. I've used a ton of CPM M4... for high volume fiber optics ferrule crimp dies. But when I want to cut stuff I come back to D2. I could use anything, but I use D2. When properly heat treated it has out performed every material I have personally tested in most soft production cutting applications. I could use absolutely any material available in the world and I keep coming back to D2. The application I mentioned above with 250,000 cuts was in Kevlar. Ever cut a lot of Kevlar? The system I was replacing used tungsten carbide and didn't achieve 25,000 cuts. D2 outperformed carbide by more than an order of magnitude. It's an ideal material for a lot of industrial cutting applications. Being nearly stainless it would also be a good choice in an NSF51 kind of "food" application where cutting tools get washed but not oiled.
 
Thank you guys for your views and suggestions. Will keep in view your answers and whatever material I choose to make the blade, will let you know the result of it.

Thanks once again. I appreciate you people's help a lot.

Regards,
Abhishek Sopariwala.
 
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