Thinking on a Jumpmaster 2

[PM2Josh]

So tell me about the Jumpmaster 2. Has the reason for H2 superior edge retention been figured out in serrated form?
I am getting read to buy a Jumpmaster 2.
Mainly for corrosion resistance. Just trying to understand how a soft steel in serrated form can outperform all other steels in serrated form.
Is there any logical reason why I should possibly look into a fixed blade serrated vg10? Or different steel?

[sal]

Hi PM2Josh,

Welcome to our forum.

sal

[PM2Josh]

(Edited due to error)
Thank you Sal. I just bought a Military 2 in SPY27CPM steel for my birthday. And it has become my favorite folder. I went ahead and ordered the jump master from knife center. To try out.
As I want something maintenance free when I trim branches, strapping material, and go fishing by the ocean.
I am extremely impressed with the PM2 and SPY27CPM steel.
Honored that you welcomed me to the forum.
I currently own 5 Spyderco knives.

1.Endura 4 PE. ((My first Spyderco)
2. Byrd Hawkbill SE
3. PM2 (SPY27CPM)
4. Bow River (Superb quality for the budget price)
5. Jumpmaster (Arriving Tuesday)

[Red Leader]

PM2Josh,

Welcome aboard!

If you search in the forum history, you'll find that there are quite a few spirited conversations around the H1/H2 serrated edge retention topic. Some attribute it to work hardening from the grinding, some are skeptical of of the whole thing, and many of us aren't sure where to begin.

In a previous thread I had started, Sal had an enlightening comment when he said that from their testing, what they found was that serrations doubled cutting ability/retention of their plain-edged counterparts for most steels, whereas H1/H2's edge retention was 4x the amount in the serrated format, from its plain edged variant. So, in a sense, the serrations on H1/H2 are something special in that they drastically up the performance of that steel.

However (and this is where some of the lively discussion may keep going), I'd be curious to see what a serrated Rex-121 could do in direct head-to-head comparison to serrated H1/H2. I know that Rex-121 in a SE may be improbable due to brittleness or other factors (maybe too tough to grind?) but in theory, even though H1/H2 could see a massive jump in edge retention going from plain edge to serrated edge, since Rex-121's edge holding prowess is already so high, imagine that...doubled, and you'd probably still come out way ahead of anything that H1/H2 serrated steel can do, even with it's 4x performance.

This is all for fun, btw. I don't know of a SE Rex-121 (though Spyderco may have one in deep in their underground lab) and the Jumpmaster 2 in H2 in a SE is a very high performance knife. My son would really like one!

[PM2Josh]

PM2Josh,

Welcome aboard!

If you search in the forum history, you'll find that there are quite a few spirited conversations around the H1/H2 serrated edge retention topic. Some attribute it to work hardening from the grinding, some are skeptical of of the whole thing, and many of us aren't sure where to begin.

In a previous thread I had started, Sal had an enlightening comment when he said that from their testing, what they found was that serrations doubled cutting ability/retention of their plain-edged counterparts for most steels, whereas H1/H2's edge retention was 4x the amount in the serrated format, from its plain edged variant. So, in a sense, the serrations on H1/H2 are something special in that they drastically up the performance of that steel.

However (and this is where some of the lively discussion may keep going), I'd be curious to see what a serrated Rex-121 could do in direct head-to-head comparison to serrated H1/H2. I know that Rex-121 in a SE may be improbable due to brittleness or other factors (maybe too tough to grind?) but in theory, even though H1/H2 could see a massive jump in edge retention going from plain edge to serrated edge, since Rex-121's edge holding prowess is already so high, imagine that...doubled, and you'd probably still come out way ahead of anything that H1/H2 serrated steel can do, even with it's 4x performance.

This is all for fun, btw. I don't know of a SE Rex-121 (though Spyderco may have one in deep in their underground lab) and the Jumpmaster 2 in H2 in a SE is a very high performance knife. My son would really like one!

I went to reply and accidentally sent you a pm instead. Getting used to the formatting on this site on an Amazon fire max tablet.

[PM2Josh]

PM2Josh,

Welcome aboard!

If you search in the forum history, you'll find that there are quite a few spirited conversations around the H1/H2 serrated edge retention topic. Some attribute it to work hardening from the grinding, some are skeptical of of the whole thing, and many of us aren't sure where to begin.

In a previous thread I had started, Sal had an enlightening comment when he said that from their testing, what they found was that serrations doubled cutting ability/retention of their plain-edged counterparts for most steels, whereas H1/H2's edge retention was 4x the amount in the serrated format, from its plain edged variant. So, in a sense, the serrations on H1/H2 are something special in that they drastically up the performance of that steel.

However (and this is where some of the lively discussion may keep going), I'd be curious to see what a serrated Rex-121 could do in direct head-to-head comparison to serrated H1/H2. I know that Rex-121 in a SE may be improbable due to brittleness or other factors (maybe too tough to grind?) but in theory, even though H1/H2 could see a massive jump in edge retention going from plain edge to serrated edge, since Rex-121's edge holding prowess is already so high, imagine that...doubled, and you'd probably still come out way ahead of anything that H1/H2 serrated steel can do, even with it's 4x performance.

This is all for fun, btw. I don't know of a SE Rex-121 (though Spyderco may have one in deep in their underground lab) and the Jumpmaster 2 in H2 in a SE is a very high performance knife. My son would really like one!

The H1/H2 steel's exceptional edge retention against Spyderco's benchmarks truly caught my attention. REX-121 intrigues me, and I'm fascinated by the H1/H2's resilient blade that can bend and return to its original shape without fracturing.
Seems to be an extremely tough steel.

My recent purchase of the Jumpmaster 2 seems ideal for versatile outdoor and professional applications, with the added benefit of rust resistance.
While I appreciate carbon steel, I prefer it for larger tools like machetes, axes, and Very large fixed blades due to their more affordable pricing.
Compared to a stainless equivalent that can match the impact resistance of Carbon Steel.
Since acquiring the PM 2 in SPY27 CPM for my 52nd birthday, I've been expanding my Spyderco collection.
Their edge geometry and handle ergonomics is particularly impressive to me.
I was a bit skeptical about H2 steel. But figured what the heck. Try it out.

[Red Leader]

PM2Josh,

Welcome aboard!

If you search in the forum history, you'll find that there are quite a few spirited conversations around the H1/H2 serrated edge retention topic. Some attribute it to work hardening from the grinding, some are skeptical of of the whole thing, and many of us aren't sure where to begin.

In a previous thread I had started, Sal had an enlightening comment when he said that from their testing, what they found was that serrations doubled cutting ability/retention of their plain-edged counterparts for most steels, whereas H1/H2's edge retention was 4x the amount in the serrated format, from its plain edged variant. So, in a sense, the serrations on H1/H2 are something special in that they drastically up the performance of that steel.

However (and this is where some of the lively discussion may keep going), I'd be curious to see what a serrated Rex-121 could do in direct head-to-head comparison to serrated H1/H2. I know that Rex-121 in a SE may be improbable due to brittleness or other factors (maybe too tough to grind?) but in theory, even though H1/H2 could see a massive jump in edge retention going from plain edge to serrated edge, since Rex-121's edge holding prowess is already so high, imagine that...doubled, and you'd probably still come out way ahead of anything that H1/H2 serrated steel can do, even with it's 4x performance.

This is all for fun, btw. I don't know of a SE Rex-121 (though Spyderco may have one in deep in their underground lab) and the Jumpmaster 2 in H2 in a SE is a very high performance knife. My son would really like one!

The H1/H2 steel's exceptional edge retention against Spyderco's benchmarks truly caught my attention. REX-121 intrigues me, and I'm fascinated by the H1/H2's resilient blade that can bend and return to its original shape without fracturing.
Seems to be an extremely tough steel.

My recent purchase of the Jumpmaster 2 seems ideal for versatile outdoor and professional applications, with the added benefit of rust resistance.
While I appreciate carbon steel, I prefer it for larger tools like machetes, axes, and Very large fixed blades due to their more affordable pricing.
Compared to a stainless equivalent that can match the impact resistance of Carbon Steel.
Since acquiring the PM 2 in SPY27 CPM for my 52nd birthday, I've been expanding my Spyderco collection.
Their edge geometry and handle ergonomics is particularly impressive to me.
I was a bit skeptical about H2 steel. But figured what the heck. Try it out.

The JM2 is a classic - you did well in picking it up! So many great options, and if you hang around here long enough, you'll be introduced to many more and be adding some other fine gems to your collection.

[zhyla]

Has the reason for H2 superior edge retention been figured out in serrated form?

You should go read thru some of those threads. There's a lot of discussion but you know what there's none of? Comparison of edge wear under a microscope between H1/H2 serrations and anything else.

I absolutely would not buy a serrated H1 or H2 knife with the assumption that it will have industry leading edge retention. But it will be rust proof and hold a usable edge.

Just trying to understand how a soft steel in serrated form can outperform all other steels in serrated form.

I know what Eric said in that one video. I don't think anyone, including Spyderco, is currently making a claim that H1/H2 outperforms higher end steels, or really any other steels, in serrated form. I'm not aware of any public data that would support that. If you read the Knife Steel Nerds article on H1 I think you'll see Larrin is equally confused as most of us by the edge retention statements that have been made.

Someone was begging for SE CATRA data. I think this is one area where everyone wants to see the data. Until then... I would take the various statements about H1 SE from the Glessers as them being excited about an awesome product rather than a performance claim.

[vivi]

I think I'm going to ask santa for one of these this year.

[PM2Josh]

Has the reason for H2 superior edge retention been figured out in serrated form?

You should go read thru some of those threads. There's a lot of discussion but you know what there's none of? Comparison of edge wear under a microscope between H1/H2 serrations and anything else.

I absolutely would not buy a serrated H1 or H2 knife with the assumption that it will have industry leading edge retention. But it will be rust proof and hold a usable edge.

Just trying to understand how a soft steel in serrated form can outperform all other steels in serrated form.

I know what Eric said in that one video. I don't think anyone, including Spyderco, is currently making a claim that H1/H2 outperforms higher end steels, or really any other steels, in serrated form. I'm not aware of any public data that would support that. If you read the Knife Steel Nerds article on H1 I think you'll see Larrin is equally confused as most of us by the edge retention statements that have been made.

Someone was begging for SE CATRA data. I think this is one area where everyone wants to see the data. Until then... I would take the various statements about H1 SE from the Glessers as them being excited about an awesome product rather than a performance claim.

After careful consideration of the Glessers' insights, I'm intrigued by the H1/H2 steel's performance characteristics. The serrated version seems promising, with potential advantages beyond mere composition—including factors like grind geometry and work hardening.

My decision to acquire a Jumpmaster in this steel stems from its exceptional toughness and corrosion resistance. The steel's ability to withstand extreme deformation without fracturing is particularly compelling. In my specific environment, durability and resistance to elemental damage take precedence over edge retention.

This steel appears to fill a long-standing equipment gap for me. Its reputed ease of maintenance, particularly with a Spyderco Lansky sharpener, adds to its appeal.

The endorsement from experienced professionals like Eric and Sal, who have access to any knife and steel they desire, provides additional confidence. Their selection of this steel for critical equipment like a bug-out bag speaks volumes about its reliability and performance.

I think I will really enjoy the Jumpmaster when it arrives this week.

[PM2Josh]

I think I'm going to ask santa for one of these this year.

My dumb in debt *** asked Affirm buy now pay later.
Since Santa don't like me very well.
What the heck! Only live once is how I see it.

[blueblur]

The JM2 is a great blade. There isn’t anything else out there quite like it.

[zhyla]

I'm intrigued by the H1/H2 steel's ... work hardening.

My decision to acquire a Jumpmaster in this steel stems from its exceptional toughness and corrosion resistance.

Just wanted to point out that hardness and toughness are at odds with each other. But you'll get that toughness because it's a fairly soft steel and that work hardening bit doesn't mean it gets harder as you cut stuff. Work hardening is a metallurgic term.

[PM2Josh]

I'm intrigued by the H1/H2 steel's ... work hardening.

My decision to acquire a Jumpmaster in this steel stems from its exceptional toughness and corrosion resistance.

Just wanted to point out that hardness and toughness are at odds with each other. But you'll get that toughness because it's a fairly soft steel and that work hardening bit doesn't mean it gets harder as you cut stuff. Work hardening is a metallurgic term.

I will be satisfied. Appreciate the clarification. I just got my Jumpmaster 2 hours ago. Gonna be my Bug Out Bag knife and camping blade.
I really like how the serrations look on mine. Almost see my reflection.
The handle is good for up to 3xxl hands and very comfortable.
And I like the Boltaron sheath.
This is very well made and worth the $210 I paid for it through Affirm.
I am a verry happy 52 year old man haha

[shunsui]

This thread needs more pictures

[PM2Josh]

This thread needs more pictures

Agreed. Some reason the site says my photos are too large. I will post a few later today and try my phone out in place if my tablet.

[PM2Josh]

Finding photos on this format to be annoying. Let's hope this came out right.

[vivi]

you need to use an image compressor typically to host the photos on the forum itself.

[PM2Josh]

Some spydies.

[PM2Josh]

you need to use an image compressor typically to host the photos on the forum itself.

Starting to figure it out.