High RC 3V Chopper

bluntcut

High RC 3V Chopper
June 02, 2016 09:37AM

Registered: 4 years ago
Posts: 173

Is it feasible to make a working 3V chopper specs below?

3/16" or 7/32" thick x 2" wide, 10.5" blade (16" OAL), 0.020"BET, 17dps, 64-65RC

5K sharpened edge that capable of withstand hard/all-my-strength chopping: seasoned [pin-knotted pine; oak; olive; ebony] - w/o visible damage.

I am looking for your thoughts on feasibility of success or wise words range from waste$ to futile to stup*d cool smiley

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Mark a

Re: High RC 3V Chopper
June 02, 2016 11:32AM

Registered: 6 years ago
Posts: 3,259

If you were only chopping clear pine then I would have no doubts it would be fine.
The only way to know really is to try and I say go for it.

www.theflatearthsociety.org

BIGFOOT FINDS YOU, YOU DON'T FIND BIGFOOT!

IT IS THE E-NEP THROWING BROTHERHOOD

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bluntcut

Re: High RC 3V Chopper
June 02, 2016 02:55PM

Registered: 4 years ago
Posts: 173

I will make a 6.75" x 2" W x 0.156" thick 3V wood cleaver. 65rc is the target testing hardness. Chopping green pine with plenty of pin knots would be one of most challenging chop tests. If succeeded, then will make a chopper or 2.

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bluntcut

Re: High RC 3V Chopper
June 03, 2016 06:36PM

Registered: 4 years ago
Posts: 173

While a 15 minutes video is uploading at molasses speed.

BluntCut MetalWorks 20160603
CPM 3V, 65RC, 0.156" thick x 1.9" wide, 7.5" blade, 12.5" OAL
Edge thickness range: 0.014" to 0.025" (tested area ~0.02" thick)

Well, it would be entertaining to hear your bet/speculation/laugh about the outcome

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bluntcut

Re: High RC 3V Chopper
June 03, 2016 09:50PM

Registered: 4 years ago
Posts: 173

Alright then - here is the video [youtu.be]

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C Amber

Re: High RC 3V Chopper
June 04, 2016 04:07AM

Registered: 6 years ago
Posts: 3,117

I haven't watched video yet, but my guess is not good. I'm hoping I'm wrong though.

_______________________________________________________________________________________________

Always in search of a good choppa'

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C Amber

Re: High RC 3V Chopper
June 04, 2016 04:24AM

Registered: 6 years ago
Posts: 3,117

It did a lot better than I thought! Nice work.

_______________________________________________________________________________________________

Always in search of a good choppa'

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Luisknivacc

Re: High RC 3V Chopper
June 04, 2016 08:33AM

Registered: 5 years ago
Posts: 568

I'm constantly impressed by how your higher RC chooppers deform instead of breaking, good job.

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bluntcut

Re: High RC 3V Chopper
June 04, 2016 09:55AM

Registered: 4 years ago
Posts: 173

Thanks.

Quote
Luisknivacc
I'm constantly impressed by how your higher RC chooppers deform instead of breaking, good job.

My yt comment/reply

Instead of guessing - I went outside and:
Made 10 shattered chops through frozen beef rib bone. Straight down /perpendicular chops resulted in no or micro ripple. Repeat on same edge area with rippled = micro chips, since the bend has exceeded plastic zone. 20-30 degrees off 90* chops = big ripples and 1 chip to 0.008-0.01" cross section thick. From sound of some lateral chops, for sure I though/expect a large chip past edge shoulder - I am surprise at outcome.
I did tempered this blade down from 66+rc as-quenched. 3V 67rc is a highest AQ hrc I ever done. I plan to make a few small 3V knives with 66+rc. Certain will test 1 or 2 untempered 3V blades.

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me2

Re: High RC 3V Chopper
June 05, 2016 03:59AM

Registered: 7 years ago
Posts: 2,265

How are you determining hardness for the test blades?

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bluntcut

Re: High RC 3V Chopper
June 05, 2016 07:02AM

Registered: 4 years ago
Posts: 173

Each test blade has no less than 3 rockwell hardness indentor marks.

I did this video because someone on BF suggested

[youtu.be]

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bluntcut

Re: High RC 3V Chopper
June 05, 2016 08:36AM

Registered: 4 years ago
Posts: 173

Done yesterday

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