Can anyone tell me what types of steel are in the stack to make damascus steel. Or what u like to use.Iv ben blacksmithing for 2 to 3 years now an would like to try this.thanks for any help.
im new to knife making.I have a question you may be able to answer. i made a knife from annealed D2 stock,used a waterjet for the rough design,and finished with a grinder. it is completed and sharpened. Do i need to heat treat it? if so...how?
@Conan568 you seem like you have alot of experience mabey you can help me. a few days ago i made my first block of damascus steel out of 3 peices of eaquil carbon content steel everyting went perfectly but after the block cooled it was too hard to even use a file on feels like it was tempered i annealed it no difference . my only guess is that it absorbed extra carbon but i dont know if how or why ps i used a coal forge.
Thank you for the video, great shop you have and I wish I had a hammer half that good. My Grandfather and his before him always hammered until they had a bar that was 3/4th's of an inch thick then twisted it then folded it again and hammered it all back in shape to give a water type pattern to the metal, do you do that as well or is it sufficient to just keep it flat? Reason I am asking is I am about to pick up this as a hobby now that I am old LOL I just loved watching my Grandfather work
is your forge hammer on a concrete floor becouse when you pour the coals to that thing it shakes tha camera that what 20ft away that little thing must got some juice to it
@Conan568 you sir are awesome, not only because of your insane blacksmithing skills but also for that epic comment about taking an arrow in the knee. I wish I can become as good blacksmith as you are in time.
Bad Ass Man....VERY Nice Job!!! It is good to see Craftsman such as your self out there doing it right. Dig it. What did that Bar become and how long did the actual process take to do?
I'm wondering if anyone can answer a quandary of mine. I suppose the context im thinking of katanas, but what i want to know is the purpose of folding the steel over and over? Naturally i imagine it's for strength but one video i've seen (amoung many i've been watching) indicates it's to get impurities out of the billet. That one video has had me thinking about this over and over so any imput would be much appreciated, providing you have practical knowlege and aren't relying on vids like me tyvm
@SynoDesign Ancient Europe disagrees. It was the first method of making really useful steel (That's why it was priced) - and disappeared in the 800s, when ore refining was improved and produced steel of higher carbon content.
8 folds should have yielded 128 layers...Unless your starting point was 7 layers (stacked/welded) and then folded 5 times...this would give you 112 layers
awesome video, just starting to get into this forging and knife making. your vid has definetly made me want to stop watching vids and get after it. any ideas on how a greenhorn can get into forging?
How do you obtain 112 layers? I can't figure it, since I assume you start with a single layer and you double the layers every time you fold the piece of steel. Then it can only be 1, 2, 4, 8, 16, 32, 64, 128 layers and so fort. Fold the piece 10 times and you have 1024 layers. If you start with 2 different kind of steel it would be the same (2, 4, 8 etc). Starting with 3 layers would give 3, 6, 12, 24, 48, 96, 192 layers....
@Conan568 how did you get 7? the best i know about this is that you are folding a chunk of steel, how do you get 7 layers from a single chunk of iron/steel. (i can think of a couple ways but would like to see your answer.
crap shouldn't seem like i'm calling out like that i'll tell, i think you lost a layer at the second fold, or you used a couple already layered chunks and welded em together (a 3 and a 4). but that's pretty much how anyway, i get it now, i think, you probably make allot of these, so you prepare steel for putting something that is ordered together, then once you know what it is, you know how much of your stock you need to produce the blade. anyway if that has anything to do with why 7 layers....
Conan how long have you been forging, is it a hobby or is this your main work, how long does it normally take most capable people to become competent, is that a gas furnace????, great stuff :)
Thank you for this! Not only for putting up the vid, but for taking the time to edit it well and keep it concise. We novice through intermediate blacksmiths need more of this. =)
Very impressed to see how you handle the hammer,do a bit of Damask myself,and normaly start with 7 layers then 14-28-56-112 and so on,my q is why dont you use Borax after those 7 layers??my experience tells me(after working as a educated blacksmith for nearly 16 years) that there still will be pieses of metal(running of)betwine the layers,wich ofcause will influenze on the welding..
Mind making a video showing us how you do the initial welding of the individual layers?
adeptustechnicanus 1 day ago
@adeptustechnicanus
These stacks started out at 7 layers.
Conan568 9 hours ago
@Conan568 I enjoyed watching. Damascus steel turns out so beautiful. The math is beyond me, though. I can't get from 7 to 112.
MdotWelblech 5 hours ago
This has been flagged as spam show
good vid i like the camera bounsing , do you make anthing with the bars afer
you have mad them, i was thinking of using a timing chain ,keep em coming ,
LOZBRY 4 days ago
Awesome! The camera hates it though!!
GitarStu 6 days ago
5:25 thumbs up if u said "Oh that hammer is from Dead Island!"
DMK3261 1 week ago
@DMK3261
They do get around.
Conan568 1 week ago
SO, if you don't have a trip hammer like that, should you just hit the steel to be welded really hard with a sledgehammer?
CubeSquid 1 week ago
@CubeSquid
You don't need to hit it hard to set the weld, it's after the weld is done that you hiter' hard.
Conan568 1 week ago
living my dream!
thanks
doonhamer252 1 week ago
@doonhamer252
Thanks for watching.
Conan568 1 week ago
cool. i like your forge. espessialy your hammer
666skelter 1 week ago
@666skelter
Soon I'll be firing it up.
Conan568 1 week ago
That was cool! Thanks for the video!
Roadkill07 1 week ago
@Roadkill07 I'm glad you liked it.
Conan568 1 week ago
Thank you! One last thing, would you possibly know the exact name of those steels you mentioned (like 1095, for example)?
CubeSquid 2 weeks ago
@CubeSquid
You nailed it, 1095 is the one to use.
Conan568 2 weeks ago
What steels do you use. I'm a novice blacksmith looking for the right steels to use in damascus steel billet.
CubeSquid 2 weeks ago
@CubeSquid
Use spring steel an a low carbon alloy.
And soak the stack well on the first weld to make sure the center is hot enough.
Conan568 2 weeks ago
how the steel looks like with 15 or more folds?
ilikemoney8 2 weeks ago
@ilikemoney8
It wouldn't look too good because the layers would be so thin it wouldn't produce a good pattern.
I used to take all of my bars to 448 layers, but found that too tight for smaller knives and now I stop at 336 layers.
Conan568 2 weeks ago
Why are you NOT my father?
mercsan117 2 weeks ago
@mercsan117
I didn't travel much back then, and never met your Mom.
Conan568 2 weeks ago 6
Comment removed
mercsan117 2 weeks ago
This has been flagged as spam show
Can anyone tell me what types of steel are in the stack to make damascus steel. Or what u like to use.Iv ben blacksmithing for 2 to 3 years now an would like to try this.thanks for any help.
TheJeepdriver209 2 weeks ago
Hey Conan do you ever make damascus steel in thick pieces? I would like some pieces 3/4 inch round and 5.5 inches long.
nsfr1206 3 weeks ago
@nsfr1206
I don't have any Damascus left, and have to make more before I do any knives.
Check ebay, but avoid the steel made in India.
Conan568 3 weeks ago
didn't your mom tell you not to play with fire??
123patriotsfan 3 weeks ago
@123patriotsfan
Yep.
Conan568 3 weeks ago
Conan I would like to talk to you about making a product.
nsfr1206 3 weeks ago in playlist Uploaded videos
@nsfr1206
Thank you for your interest, but I'm not accepting orders until I make more steel.
Contact me after I post my next Damascus video if you like.
Conan568 3 weeks ago
@Conan568 Do you have a website?
nsfr1206 3 weeks ago in playlist Uploaded videos
im new to knife making.I have a question you may be able to answer. i made a knife from annealed D2 stock,used a waterjet for the rough design,and finished with a grinder. it is completed and sharpened. Do i need to heat treat it? if so...how?
Endure2theEnnd 3 weeks ago
@Endure2theEnnd
You need to send that steel away to heat treat it properly.
Conan568 3 weeks ago
@Conan568 any suggestions on that?
Endure2theEnnd 3 weeks ago
does damascus define what type of steel it is or is it how its shaped into a weapon
dogbone222 3 weeks ago
@dogbone222
It's 2 types of steel, crucible or patterned welded Damascus.
Conan568 3 weeks ago
@Conan568 and was pattern welded what you did?
dogbone222 3 weeks ago
@dogbone222
That's right.
Conan568 3 weeks ago
@Conan568 rgr. heard damascus steel was the best. wanna make a napolionic type sabre and a katana
dogbone222 3 weeks ago
@dogbone222
Good luck.
Conan568 3 weeks ago
@Conan568 you seem like you have alot of experience mabey you can help me. a few days ago i made my first block of damascus steel out of 3 peices of eaquil carbon content steel everyting went perfectly but after the block cooled it was too hard to even use a file on feels like it was tempered i annealed it no difference . my only guess is that it absorbed extra carbon but i dont know if how or why ps i used a coal forge.
pyro0115 1 month ago
@pyro0115
It didn't anneal that's all.
Build a fire and let it slow cool overnight.
And mix low carbon steel into the billet.
Conan568 1 month ago
Isn't it dangerous leaving your arms exposed like that? I see sparks flying everywhere.
daleduru 1 month ago
@daleduru
It's not bad like a mild sun-burn.
Conan568 1 month ago
Thank you for the video, great shop you have and I wish I had a hammer half that good. My Grandfather and his before him always hammered until they had a bar that was 3/4th's of an inch thick then twisted it then folded it again and hammered it all back in shape to give a water type pattern to the metal, do you do that as well or is it sufficient to just keep it flat? Reason I am asking is I am about to pick up this as a hobby now that I am old LOL I just loved watching my Grandfather work
NiteStar131 1 month ago
Hand hammer all that, then ill be impressed.
mrmysery1984 1 month ago
@mrmysery1984
I think you have me confused with someone else.
I'm not out to impress anyone.
Conan568 1 month ago 21
@mrmysery1984 Nice video dude. I'd kill for that power hammer.
miteeoak 1 month ago
Is that borax your dipping the steel in there, in front of the hammer?
thedigitalsorcerer 1 month ago
@thedigitalsorcerer
Yes, but not the stuff you buy in a store, I use pure anhydrous borax.
Conan568 1 month ago
here's a idea if ya plan on talknig turn the hammer thing off so the pounding doesn't muffle out everything you say !?!!!
monrofay 1 month ago
@monrofay
I had it on for effect and to warm up the machine.
Conan568 1 month ago
is your forge hammer on a concrete floor becouse when you pour the coals to that thing it shakes tha camera that what 20ft away that little thing must got some juice to it
chris96xj 2 months ago
@chris96xj
The concrete under that hammer is about a foot thick with rebar, but it's not isolated so it does shake when I strike hard.
Conan568 2 months ago
Hey man, your videos are awesome, keep making them! :)
Kris0203 2 months ago
@Kris0203
Thanks, I'm just now building a professional size coal and coke forge.
I will be filming the forging of a large camp knife in it soon.
Conan568 2 months ago
!!DING!!
*Your blacksmith skill has reached 500000000*
MPSecare 2 months ago
@MPSecare
I used to make iron daggers.
Then I took an arrow to the knee and....
Conan568 2 months ago
@Conan568 you sir are awesome, not only because of your insane blacksmithing skills but also for that epic comment about taking an arrow in the knee. I wish I can become as good blacksmith as you are in time.
dakotherathunter 2 months ago
@dakotherathunter
Thanks.
There's a lot of people taking arrows to their knees lately it seems.
My side-kick Lydia, took one to the ass the other day.
I pulled the arrow out, gave her some poison potion and she'll be just fine.
If you have access to coal char-coal or even wood you can get into smithing yourself.
You can use a blow dryer as a blower for you forge, and any thick piece of iron can be used as an anvil.
Go for it.
Conan568 2 months ago
genius, that steel is worth its weight in gold with all the work you put into it
jezzafox 2 months ago
@jezzafox
Thanks.
I'm in the process of building a coal forge around a Vulcan fire-pot.
I'll be able to weld up huge stacks of steel with the fire it will make.
And it should make for some great videos.
Conan568 2 months ago
Bad Ass Man....VERY Nice Job!!! It is good to see Craftsman such as your self out there doing it right. Dig it. What did that Bar become and how long did the actual process take to do?
Thank You.
wolfbass46 2 months ago
@wolfbass46
Thank you.
I used the bar for fittings because it was a low layer bar.
It took about 3 hours to do this.
Conan568 2 months ago
@Conan568 Thank you, again, Excellent stuff, I look forward to viewing more of your Videos and creations.
wolfbass46 2 months ago
Are you a proffesional blacksmith?
Summonspaceqex200 2 months ago
@Summonspaceqex200
No I'm a Bladesmith, but I do know many of the Blacksmithing techniques..
I can forge a blade very fast and accurate but that is my specialty.
Conan568 2 months ago
@Conan568 never too late to learn.
looks like a living headache, do you not use ear protection?
starchild9000 2 months ago
to continue from my last post, i want to stress the katana context because i understand that in this technique it's to weld the layers together
TheSouthsidestrangle 2 months ago
@TheSouthsidestrangle
The folding was used to take the impurity's out of the billet and the patterns this produced was a by-product of the process.
Now we do it to get the pattern.
Conan568 2 months ago
@Conan568 righto, thank you very much
TheSouthsidestrangle 2 months ago
@TheSouthsidestrangle
You're welcome.
The Ancient's started pattern development soon after this process was discovered and the Viking's mastered the art of complex patterns and sword.
The Viking's could teach the Japanese a thing or two, and visa versa.
Conan568 2 months ago
@Conan568 i do have another question if you don't mind
TheSouthsidestrangle 2 months ago
I'm wondering if anyone can answer a quandary of mine. I suppose the context im thinking of katanas, but what i want to know is the purpose of folding the steel over and over? Naturally i imagine it's for strength but one video i've seen (amoung many i've been watching) indicates it's to get impurities out of the billet. That one video has had me thinking about this over and over so any imput would be much appreciated, providing you have practical knowlege and aren't relying on vids like me tyvm
TheSouthsidestrangle 2 months ago
Man you got a great setup of equipment. I almost can't believe your not wearing hearing protection.
Aqualiteking 2 months ago
@Aqualiteking
It's not too bad when you don't hit too hard with the flat side of the dies.
Conan568 2 months ago
i envy your equipment sir.
NatureManGuy 2 months ago
@NatureManGuy Thanks I got some great deals on it too.
Conan568 2 months ago
Bono is a smithy?
Marshallvs80 3 months ago
@Marshallvs80
I'd say Bono is more into Rock and not Metal.
Conan568 3 months ago
nice i love metal bar
kristian2858 3 months ago
ey can i make damascus with only one kind of steel like a file.
MIGUELch8 3 months ago
@MIGUELch8
You could fold it and weld it, but you'd end up with a file at the end.
You need two dissimilar alloys for a pattern to show after the acid bath.
Conan568 3 months ago
@Conan568 what do you mean by acid bath?
MIGUELch8 3 months ago
@MIGUELch8
You have to etch the steel in acid to get a pattern to show.
Conan568 3 months ago
@Conan568 thanks and one last question ,in your opinion are files good material for knife making?and check out my forge.
MIGUELch8 3 months ago
@MIGUELch8
Files are good for smaller knives but use leaf springs for big chopping blades.
Conan568 3 months ago
Thank you, Conan - a really well made video. (and great forging)
DerLaCroix1 3 months ago
@DerLaCroix1
Glad you liked it.
Conan568 3 months ago
@SynoDesign Ancient Europe disagrees. It was the first method of making really useful steel (That's why it was priced) - and disappeared in the 800s, when ore refining was improved and produced steel of higher carbon content.
DerLaCroix1 3 months ago
@ Raven You have to account for that the outer layer is welded onto itself, so it goes missing -> 4 -8(7)
IF you are a pedant, then it continues 7-14(13)-26(25)-50(49) - 98(97), etc. but I guess no one counts it that precisely.
DerLaCroix1 3 months ago
8 folds should have yielded 128 layers...Unless your starting point was 7 layers (stacked/welded) and then folded 5 times...this would give you 112 layers
Raven9619 3 months ago
@Raven9619
Yep, I started with 7 layers.
Conan568 3 months ago
Comment removed
Raven9619 3 months ago
what is that machine that you are using called?
MIGUELch8 3 months ago
@MIGUELch8
It's a Struker 88 lb ram forging hammer, but they're sold under another brand now.
Conan568 3 months ago
@Conan568 thanks
MIGUELch8 3 months ago
Nice work and good job on the video as well, thanks for popsting it! I'd love to have a hammer that size.
KragAxe 3 months ago
@KragAxe
Thanks, that hammer is perfect for me.
Conan568 3 months ago
look up Battle Angel Alita , Damascus blade and James Cameron get to work and stock up on that Damascus Steel cha-ching no joke
blackgriffinxx 3 months ago
@blackgriffinxx
I have 4 years to do it.
Conan568 3 months ago
I can only imagine home long that would take without that pneumatic hammer. No wonder damascus steel was so prized in ancient times.
SHTFSurvivalist 3 months ago
@SHTFSurvivalist
They had lots of big slaves back then to strike for the Smith's.
The Viking's even had big water powered hammers.
Conan568 3 months ago
@Conan568 Cool, I never knew that about the water powered hammers.
SHTFSurvivalist 3 months ago
@SHTFSurvivalist it wasnt around in ancient times
it first came about in the 1500-1600's japan and england
SynoDesign 3 months ago
Ok. You've made the bar, now produce an 8" chef knife and send it to me free of charge.
TCDF22 3 months ago
@TCDF22
If you can pull some strings and make my lotto ticket the winner, you're on.
Conan568 3 months ago 4
01:24 looks just like the engineer from tf2!
bajsmannensparty 4 months ago
Keep your eye open for the tools you need and give it a try.
Conan568 4 months ago
awesome video, just starting to get into this forging and knife making. your vid has definetly made me want to stop watching vids and get after it. any ideas on how a greenhorn can get into forging?
killerkane19k 4 months ago
The air hammer is shaking the camera! Must go right through you.
I've seen this done on a hydraulic press.Looked like a much more 'relaxing' method
express375 4 months ago
@express375
Yeah it can hit pretty hard alright.
Conan568 4 months ago
I remember as a kid the smitddy would sprinkle silica sand? on to the hot metal, when fire welding. is this the same thing?
doonhamer252 4 months ago
@doonhamer252
Almost.
The Japanese use clay and ash.
Conan568 4 months ago
So many sparks... Scar tissue .... Great equipment...
MrAvalanche2004 5 months ago
@MrAvalanche2004
It's all good, lol.
Conan568 5 months ago
You should teach a class! Make money while at the same time getting free labor!
mynameismatt2010 5 months ago
@mynameismatt2010
Sure.
Conan568 5 months ago
how many hours would something like that take without that automatic hammer thing?
ziltoidthegreat 5 months ago
@ziltoidthegreat
Maybe 8 hours.
Conan568 5 months ago
That's awesome :D i wish i could craft some blades =D
TioYoh 5 months ago
@TioYoh
Give it a try.
Conan568 5 months ago
you look like kim coates from sons of anarchy
88spd 5 months ago
We reached1,000,000 views today.
Thanks for watching .
Conan568 5 months ago
great to see a craftsman at work and hugs to rocky JRs ftw!
mrgreebly 6 months ago
Awesome.
IGotAPagina 6 months ago
@IGotAPagina
Thanks, it's quite a light show alright.
Conan568 6 months ago
you are tony stark
okwoode 6 months ago 11
@okwoode
Lol.
Conan568 6 months ago
Those first few strikes after a weld heat are incredible.
Braveskin 6 months ago
@Braveskin
Yeah the sparks DO fly, don't they.
Conan568 6 months ago
How do you obtain 112 layers? I can't figure it, since I assume you start with a single layer and you double the layers every time you fold the piece of steel. Then it can only be 1, 2, 4, 8, 16, 32, 64, 128 layers and so fort. Fold the piece 10 times and you have 1024 layers. If you start with 2 different kind of steel it would be the same (2, 4, 8 etc). Starting with 3 layers would give 3, 6, 12, 24, 48, 96, 192 layers....
Where do the 112 layers come from?
MasterCaesar 6 months ago
@MasterCaesar
I misspoke on this video, I should have said 7, 14, 28. 56, and finally 112 layers.
Conan568 6 months ago
@Conan568 how did you get 7? the best i know about this is that you are folding a chunk of steel, how do you get 7 layers from a single chunk of iron/steel. (i can think of a couple ways but would like to see your answer.
kght222 6 months ago
@kght222
I start out with 7 layers because to get a pattern you need to mix different steels together like high carbon and low carbon steel.
The more times you fold it, the finer the pattern.
Conan568 6 months ago
crap shouldn't seem like i'm calling out like that i'll tell, i think you lost a layer at the second fold, or you used a couple already layered chunks and welded em together (a 3 and a 4). but that's pretty much how anyway, i get it now, i think, you probably make allot of these, so you prepare steel for putting something that is ordered together, then once you know what it is, you know how much of your stock you need to produce the blade. anyway if that has anything to do with why 7 layers....
kght222 6 months ago
Conan how long have you been forging, is it a hobby or is this your main work, how long does it normally take most capable people to become competent, is that a gas furnace????, great stuff :)
jaseanddi 6 months ago
@jaseanddi
I've been doing this since the late 80s as a hobby, and it depends on the person how long it takes.
My forge runs on propane gas, and I have 2 X 100 lb tanks teed to supply the large amount of propane needed to forge weld.
Conan568 6 months ago
@Conan568 , thank you, any tips on getting started, books, dvds etc, cheers 4 replying, jason
jaseanddi 6 months ago
@jaseanddi
Google the book called "The Complete Bladesmith" and buy it if you want to make knives.
Conan568 6 months ago
excellent stuff, must be some moneys worth in that bad ass hammer, good for the hearing aswell :)
jaseanddi 6 months ago
@jaseanddi
I got that hammer for half price so it wasn't too bad.
Conan568 6 months ago
This is what you call a real man's work. None of your pen pushing mamby pambys.
bbcisrubbish 6 months ago
@bbcisrubbish
And it's almost time to do it again too.
Conan568 6 months ago
The camera shaking when your auto hammer strikes shows how much power these things can have, it makes for a good video effect too.
biometal28 6 months ago
@biometal28
It's difficult to isolate the camera from the hammer.
Conan568 6 months ago
Badass.
CaliforniaCarpenter7 6 months ago
@CaliforniaCarpenter7 Lol.
Conan568 6 months ago
Thank you for this! Not only for putting up the vid, but for taking the time to edit it well and keep it concise. We novice through intermediate blacksmiths need more of this. =)
IIDASHII 6 months ago
@IIDASHII
I'm glad it helps, my next video will show how I make my blade steel rather than just steel for fittings etc.
Conan568 6 months ago
what do u use when you fold it over? do u need flux or something?^^
13Jimbo37 6 months ago
just a question how long did this take you?
SuperSafiero 6 months ago
@SuperSafiero
It took a few hours.
Conan568 6 months ago
great SHTF knowledge to know. nice video sir
josephd27 6 months ago
@josephd27
Thanks.
Conan568 6 months ago
Beautiful welding, thanks for the video.
EltonJThe 6 months ago
@EltonJThe
Thanks for watching.
Conan568 6 months ago
I love your mancave!
MartinHuijzer 7 months ago
@MartinHuijzer
Thanks, it just needs better lighting.
Conan568 7 months ago
well I appologize sir did not see these videos very nice I give a thumbs up sir!
blacksmither537 7 months ago
@blacksmither537
Thanks, I'll be welding up some more Damascus soon if it cools down a bit.
I'll post that video as well.
Conan568 7 months ago
theres a noise ordinance where i live, so how loud is forging if i wanted to get into it?
lobsterg 7 months ago
@lobsterg
You'd probably get away with a hydraulic press but not an air or trip hammer
Conan568 7 months ago
PLEASE make a new video.. also Can I name my next son after you?
PipeGamer 7 months ago
@PipeGamer
Coming soon.
I should be releasing several.
Conan568 7 months ago
"52 layers"
i suppose a smithy might not need proficiency in numbers...
axa88888888 7 months ago
@axa88888888
Yeah I misspoke it should have been 56 layers.
I realized it right after too.
Conan568 7 months ago
Nice job man ur a badass i will subscribe right away
Juze21a 7 months ago
@Juze21a
Thanks.
Conan568 7 months ago
Hi Conan
Very impressed to see how you handle the hammer,do a bit of Damask myself,and normaly start with 7 layers then 14-28-56-112 and so on,my q is why dont you use Borax after those 7 layers??my experience tells me(after working as a educated blacksmith for nearly 16 years) that there still will be pieses of metal(running of)betwine the layers,wich ofcause will influenze on the welding..
Keep up the good work
best regards
Hans
TheGraywolf661 7 months ago
@TheGraywolf661
You only really need flux when you weld and you can weld without it too.
Conan568 7 months ago
Is that hammer supposed to tup like that all the time? I know it's a self contained air hammer. Never seen one that did that. I run one every day .
happyfoot2166 7 months ago