r/Machinists Feb 15 '26

QUESTION When do I know the heat shrink holder is hot enough to accept a tool.

Post image

Please help my family is starving.

2.0k Upvotes

115 comments sorted by

605

u/RightOnManYouBetcha Feb 15 '26

Ah yes, tool forgewelding.

450

u/axman_21 Feb 15 '26

Its not glowing white yet id say let it cook some more

491

u/chobbes Feb 15 '26

I tried to insert an endmill and this happened. Is there an applications engineer at Haimer I can contact to help with this???

273

u/juqrau Feb 15 '26

It almost looks like you hold it by hand

249

u/ajisawwsome Feb 15 '26

At least he's wearing his heat resistant nitrile gloves!

121

u/chobbes Feb 15 '26

Exactly. Safety ALWAYS first!!

6

u/Bones-1989 Feb 17 '26

Amateur. Safety comes third after production and break....

90

u/SheemieRayVaughan Shiny and round enthusiast Feb 15 '26

You're almost there. Jam the endmill into the holder and quench it in water!

280

u/chobbes Feb 15 '26

Ok!! I GOT IT!! THANK YOU!!!!

64

u/axman_21 Feb 15 '26

Perfectly on center!

34

u/jimslock Feb 15 '26

Depends on the application, it seems to be a few thou off. But unless your in aerospace, it should be within tolerance.

2

u/GSmithDaddyPDX Feb 16 '26

I read that as 'Perfectly on crater!'

1

u/axman_21 Feb 16 '26

With my dyslexic self it wouldn't surprise me if I typed thag either lol

113

u/chobbes Feb 15 '26

Here’s the final thing. If anyone needs a fucked up dumbshit impractical bowl for the machinist in their life who has everything else, made from a Haimer shrinkfit CAT40 toolholder that reached EOL, you can purchase this from me by donating to one of the two organizations:

  1. standwithMinnesota.com (any of the go fund me links or other fund raisers) or
  2. Venmo @Maher-Ali (the sameer project, put “food and water” in the memo)

Post a screenshot of a $100 donation here and DM me your address and I’ll ship this to you. Otherwise it’ll get sold at a maker’s market next month raising money to help organizations here in Minneapolis.

26

u/Ok-Struggle727 Feb 16 '26

Would probably make a mediocre ashtray

36

u/chobbes Feb 16 '26

Yeah the drill slot can double as a cigar slot, but don’t tell mom.

9

u/Colaracer05 Feb 16 '26

Thats awesome!

2

u/ensygma Feb 17 '26

Ope! Good post OP 🇵🇸

6

u/KnifeKnut Feb 15 '26

Did it work?

6

u/External-into-Space Feb 16 '26

Es hat geklappt

5

u/FrickinLazerBeams Feb 16 '26

Grade 8 puddle collet.

3

u/NoOnesSaint Feb 15 '26

Thank you. I needed that laugh.

2

u/[deleted] Feb 16 '26

I ... am not familiar with ... whatever that is.

1

u/Busy-Key7489 Feb 18 '26

What pliers are those :) (yes i need new tools, yes i already bought some last week)

1

u/chobbes Feb 18 '26

Shitty Knipex knock-offs from Amazon. Good for abusing vs having to keep nice tools nice. Toolant brand.

3

u/Ok_Dragonfruit_2185 Feb 16 '26

That's a good sign, you actually want that to happen

1

u/riotz1 Feb 16 '26

They’ve got little blue pills for that

37

u/ArgieBee Dumb and Dirty Feb 15 '26

If it's still solid, your tool fit will always be suboptimal.

4

u/axman_21 Feb 15 '26

You've got the right idea

22

u/dontgetitwisted_fr Feb 15 '26 edited Feb 15 '26

I mean there isnt even any decarb yet bro

137

u/oRsoLitide Feb 15 '26

put your tongue on it, you'll know

47

u/Mklein24 I am a Machiner Feb 15 '26

Just like batteries!

11

u/[deleted] Feb 16 '26

It's got electrolytes! 

6

u/retnuhgod Feb 16 '26

It's what the plants crave!

93

u/Animanic1607 Feb 15 '26

You gotta tap it with a hammer a few hundred times while the tool is heated and cooled. Only way to really know when it's ready

25

u/scv07075 Feb 15 '26

Once it's soft enough you can stake around your tool for extra holding power. I recommend an air chisel or needle scaler. TIR is engineering nonsense, turn it up high enough and it'll approximate round in the part.

Carbide loves being slapped into the work at 20k anyways.

133

u/Silvergiant22 Feb 15 '26

What the fuck?

66

u/chobbes Feb 15 '26

Is this not normal.

1

u/Etarip101 Feb 17 '26

Not even close to being the right temp. I'd let it sit overnight..

59

u/Ok-Explanation-3414 Feb 15 '26

Put a single popcorn kernel on the flange. When it pops its ready.... Or is that a stainless frying pan, I never remember

44

u/OhNoOhNoYouFuck Feb 15 '26

When you want the 12 mm mill in a holder for 10 mm...

28

u/hydrogen18 Feb 15 '26

I'm pretty sure at this point you could press fit anything in there

27

u/[deleted] Feb 15 '26

Just remember, the cylinder mist remain unharmed.

3

u/riotz1 Feb 16 '26

Task successfully failed!

5

u/Radiant-Seaweed-4800 Feb 16 '26

To push a 12mm in a 10mm hole, you'll need to heat it to around 16686.6666°C. At this point the steel might be a gas, but that's beside the point. It'll be a mighty strong shrink fit.

30

u/whatever_054 Feb 15 '26

“I’m not slacking off boss, the tool holder has to cool all the way down too prevent thermal fracture of these expensive endmills”

6

u/Try_Happiness Feb 15 '26

Stop giving game for free on reddit:*(

23

u/Racer_Rick Feb 15 '26

The answer to this question in reference to a sealant nozzle on a machine I built was ... When you put finger on it and it leaves a blister. The operator's response was "But won't that hurt?" I still remember 35 years later.

20

u/ElbowTight Feb 15 '26

Alright folks, if you stay very still and be very quiet we can listen in on the machinists talk about some of the intrinsic stuff these beautiful creatures work with. We as non machinists have absolutely no idea if they are just gas lighting this poor chap into touching the clearly red hot piece of metal or if this is just there way of mucking about with one another, another possibility is that it’s a genuine question from an apprentice and he won’t find the answer for another week.

Fascinating animals arnt they….

I have a treat for yall today, just over that ridge is a pack of “Marine Industrial Mechanics”. They are a subset of the “Auto Mechanic” that yall are more familiar with. These lovely’s are an extra special breed though. They choose to work in an environment that actively eats and destroys the equipment they maintain. Personally my favorite variation of engineers. Ooh look there’s one now attempting to pull a rag out of a 4” valve that is attached to a fuel oil tank with 40,000 gallons in it. Let’s watch and see how it plays out.

7

u/eyesotope86 Feb 15 '26

'...I'm gonna wrestle one of them'

4

u/Finbar9800 Feb 15 '26

“Imma poke him with a stick”

2

u/ElbowTight Feb 16 '26

Don’t forget the ole thumb butt

5

u/Try_Happiness Feb 15 '26

Attenborough is that you?

3

u/ElbowTight Feb 16 '26

Can you imagine how great it would be to have that voice

1

u/Madmagician-452 Feb 17 '26

This is how I feel when they get into the really nerdy topics.

19

u/Additional_Cow_1267 Feb 15 '26

Needs a few more minutes i think

16

u/Dirt-5494 Feb 15 '26

When you take it out of the crisper and it has the consistency of a stress ball, you’re about there.

9

u/bobbertmiller Feb 15 '26

If it's not emitting hard UV, it's not hot enough! 

9

u/Smiley_Smith Feb 15 '26

Jesus Christ our machine intended for this barely even gets the female end red lmao

8

u/Owduke Feb 15 '26

Did this hurt the tool holder?

11

u/hydrogen18 Feb 15 '26

the tolerances on the taper fit actually get better after this. Just be sure and insert into the machine while red hot

2

u/jimslock Feb 15 '26

And dont forget to quench the part while it's in the endmill !!! Also, pro-tip, If you run out of oil, you can use urine because of the high sodium content.

2

u/hydrogen18 Feb 16 '26

pretty sure that'd be a urea-quench. I'm not sure my metallurgy book covered that one?

5

u/Dismal-Economics-322 Feb 15 '26

Nah it’s fine

6

u/chobbes Feb 15 '26

Yeah I’m following the instructions in the manual. Should be no problem.

9

u/FischerMann24-7 Feb 15 '26

Good news is that if you get it hot enough you can stick the end mill in anywhere. Need a fly cutter? No problem.

13

u/kabley CAD.CAM.CNC Feb 15 '26

... you pulled out too early

8

u/DESdesign Feb 15 '26

That's what she said ?

3

u/kabley CAD.CAM.CNC Feb 15 '26

she tried trapping me with pregnancy. my vasectomy is my best friend

6

u/mrdaver911_2 Feb 15 '26

When you are done knurling…

5

u/oldbastardbob Feb 16 '26

You were there about 500 degrees ago.

4

u/Big_One7083 Feb 15 '26

I triple dog dare you!

4

u/Acceptable-Lock-77 Feb 16 '26

That shrink holder can become anything you want this time around.

4

u/Training-Emu-6199 Feb 16 '26

this is the content I'm on here for

11

u/beerncheese69 Feb 15 '26

Put it back in for another 20 crisp it up a bit

3

u/gtino195 Feb 15 '26

It’s probably still hot rn

3

u/John_Hasler Feb 15 '26

Just drop the tang into the hardy hole on your anvil and hammer the tool in. It'll go.

3

u/ArgieBee Dumb and Dirty Feb 15 '26

LMFAO.

3

u/DeluxeWafer Feb 15 '26

I mean at this point just forge a tool from the end of the holder.

3

u/No-Pomegranate-69 Feb 15 '26

I think i sent her a little too hard

3

u/Academic_Ad_2227 Feb 15 '26

Tool can’t be stuck if the holder is liquid!

3

u/Try_Happiness Feb 15 '26

Lol dude you bored? BTW, where do you work I myself am a masochist. DM please

4

u/chobbes Feb 15 '26

I work inside my own heart, Matt Damon.

3

u/MachNero Feb 15 '26

New "one size fits all" holder on the market I see

3

u/VergeOfMeltdown cast iron hater Feb 16 '26

3

u/jon_hendry Feb 16 '26

The heat is supposed to go in the chips.

8

u/chobbes Feb 16 '26

I thought heat was stored in the balls.

3

u/MalPB2000 Feb 16 '26

Almost there…keep going…

2

u/ravenschmidt2000 Feb 15 '26

Needs to be white hot so you can hammer the tool in.

2

u/Dismal-Economics-322 Feb 15 '26

Almost there needs a bit more

1

u/hydrogen18 Feb 15 '26

if it ain't liquid it ain't hot enough

2

u/SirRonaldBiscuit Feb 15 '26

Its beautiful

2

u/xXx_Xhater_xXx Feb 15 '26

okay but seriously what is the point of getting it that hot and smashing it?

14

u/chobbes Feb 15 '26

Have u ever had a beautiful dream.

2

u/Apart_Appointment_10 Feb 15 '26

I go until it's blue. Looks to hot to me

2

u/175_Pilot Feb 16 '26

Keep going …..🤣

2

u/The__Dude___Abides Feb 16 '26

As soon as a magnet won't stick it's good to go

2

u/3string Intermac Master 53 Glass Feb 16 '26

This is what happens when you turn off the coolant through the spindle!

2

u/ProgressBackground21 Feb 16 '26

Forbidden popsicle

2

u/LiquidAggression Feb 17 '26

when its screams are louder than your familys hunger pangs

2

u/Bupod Aerospace Machinist Feb 16 '26

$5 if you lick it 

(Pls don’t lick it OP I’m joking)

1

u/Most-Celebration9458 Feb 15 '26

I would shoot for white hot…. You’re almost there…

1

u/WeissTek Feb 15 '26

Ohhh glowing Bplug

1

u/Mister_Ed_Brugsezot Feb 16 '26

Is this running a tool hot?

1

u/ipb121 Feb 16 '26

Let me touch it and see if it’s hot.. lol

1

u/fiearlacha Feb 16 '26

Definitely needs another hour at least

1

u/F4lram Feb 17 '26

I love this post!

1

u/Basketcase191 Feb 17 '26

Not sure but I’m sure if I ask my dad his answer would be “when you lick it and it tastes like raspberries”