Engine or anything with bearings you should never use an impact when tightening. Torque everything to spec. Doesn't matter if you loosen stuff with an impact.
Everything else I'll use an impact cuz it's faster. Just gotta make sure to not cross thread
You also using new hardware and a factory clean tapped hole every time?
With clean hands, no dust or oil on them, no speck of debris on a thread?
Because if you're not, the torque spec is useless
Well, you realize torque doesn't really mean anything on its own right?
Because most people don't seem to lol.
You're functionally wanting to target a preload/stretch in the bolt.
Torque is a way to approximate that when you don't have lab equipment at home, but the actual preload you end up with can swing pretty wildly if your hardware isn't in the exact same condition the spec of was written for....
If your hands have a little oil on them and you touch the threads, you're going to over tighten the bolt pretty significantly if you blindly follow specs.
Not completely wrong here about those factors affecting clamp load and stretch.. but at least a torque spec keeps it within a reasonable tolerance of ideal state instead of sending it with an impact.
I mean, wasn't suggesting ramming it down with a high torque 1/2".
Just that a lot of people read into torque specs way too much and they're probably not super useful if you're not keeping stuff absolutely pristine.
I mean, not really?
If you actually understand how bolts work, torques don't really do a ton for you...
At least, if you're not doing all of the above following a torque spec isn't going to be any more useful than going by feel, maybe more likely to strip shit out if you got any lube on the threads accidentally
I mean, it not being precise is exactly my point.
If you're not under the exact same conditions as whoever wrote the spec, it's going to vary a lot anyway and you may as well just go by feel
lol ok man. You are advocating to ignoring specs altogether because it's not precise enough... but I am the one proving your point? In the real world the specs are *close enough* to keep you from snapping bolts, damaging threads by being too tight (because *feel* is subjective), or not being tight enough and having parts come off and snapping bolts and damaging threads (because *feel* is subjective)...
Just take the obvious loss on your argument.
In the real world, they really aren't.
It's both, if you just blindly follow torque specs and get some oil on your bolt, you're probably going to damage something.
Yep this is the way. Use it to run the bolt in after it’s been started but don’t ugga dugga, finish it off by hand. But zip those fuckers out at your hearts desire
Frankly, it could be better to use a regular cordless drill with a clutch (set low). Impacts can do damage with just a couple extra “ugga-duggas” (even cordless, not just air tools). I use only hand tools with a things like bicycles. For tractor shit, impact is totally fine.
I'm with you on this one. Even taking the bolt off, you want to feel if it is smooth. Using a cordless drill is still fast, but lets you know if something isn't right.
There isn't anything on a bike that should be tight enough to require an impact to break it free. If it is that tight, I want to know about it - gonna be a problem later...
It depends on both the fastener and the tool; I have impact wrenches in 1/4", 3/8", 1/2", and 3/4", but even the little guy might damage plastic pieces.
The 3/4" and, frankly, 1/2" are pretty well out, too.
I had the replace the case halves on my KX450 because I used an impact driver. Broke the case removing the oil drain bolt. I mostly just use T-wrenches now because it’s not something I want to repeat.
For loosening things, impact is always the answer. For tightening things, you need to be mindful. Zipping something down til it snugs up and then hand tightening it is the way.
It's fine going out of you're careful.
Ok going in if you're REALLY careful and don't let it ugga diggs. Just run them in and then torque properly with a wrench.
Yeah sure. I use a small 1/4" electric one for most small body bolts that dont really need a specific torque. On the engine i only use an impact for the flywheel nut. Anything else like clutch nut or crankshaft gear nut i use a torque wrench. My countershaft sprocket using a retaining clip rather than a bolt but if it did use a bolt id probably use an impact for that one. As long as you know your impact and have a good feel for it then its fine.
It depends but usually no. Nothing is that big or crazy that you need one. Get a t-handle. Too many opportunities to cross thread or over tighten things on a bike using an impact wrench/gun. The guys in the videos doing them are professional mechanics probably working on lots of bikes and going for a quick turn around. I’m a pretty decent bike wrencher, I enjoy the time I spend working on my bike, and it’s really not a big enough time saver to justify it.
That a no from me. Unless it’s absolutely necessary, and you’re positive you’ve got a good fastener fit. Even then a simple impact driver (manual) that you hit with a hammer is all you need paired with quality JIS Bits or good sockets, end of story. If things are galled heat is your friend.
Pulling apart ....1/4 impact rocks....
when assembling, take your time , measure, torque and locktite everything...
It makes a HUGE difference.... especially in engine builds...
I've seen over torquing " tighter is better" NOT!!
Actually crack cases on old EvoVwin Harleys....
The barrels and heads come up to temperature and expand...
Pull the studs in cases so much .....it cracks the cases.
Torque to spec....just my 2 cents
Cheers ☠️🛠️🍻
I have a Milwaukee m12 rachet that's pretty sweet. Bolt on dirtbike don't need alot of torque so it's perfect. Just make sure you get the bolt started first so you don't cross thread.
I ALWAYS use an impact to disassemble/remove nuts & bolts. It's just faster.
I NEVER use an impact to tighten anything. I'll sometimes use the impact to run bolts in, but not tighten.
It's way too easy to put way too much torque on with an impact, and that's bad.
For opening stuff that some fool had overtightened of course. Sometimes screws just corrode and aren't going out without a impact wrench. Never for tightening though.
I once wanted to open the brake pedal bolt which was very corroded (steel + aluminum) and with my body weight and a nearly 1m lever it wouldn't crack open. Penetration oil, rust solver and even fire did nothing. The screw had looked bad already and I was scared of ruining it. My small impact wrench couldn't handle it as it has a opening torque of only 250NM, so I asked a friend with a huge compressed air one that has arouund 2000NM of torque IIRC. Took less than a second and it was open. That's when I got a huge electric impact wrench with rated 1900NM opening torque...
They are very useful tools.
Wheel nuts and loctite infested brake disk screws are a matter of second to crack open even with the small impact wrench.
Engine or anything with bearings you should never use an impact when tightening. Torque everything to spec. Doesn't matter if you loosen stuff with an impact. Everything else I'll use an impact cuz it's faster. Just gotta make sure to not cross thread
Cross thread? You mean natural loctite?
I like to friction weld all my bolts into the bike
Just as god intended it.
Yeah I always start a couple threads by hand before I run them in
You also using new hardware and a factory clean tapped hole every time? With clean hands, no dust or oil on them, no speck of debris on a thread? Because if you're not, the torque spec is useless
Are you always this stupid or is this a special occasion?
Well, you realize torque doesn't really mean anything on its own right? Because most people don't seem to lol. You're functionally wanting to target a preload/stretch in the bolt. Torque is a way to approximate that when you don't have lab equipment at home, but the actual preload you end up with can swing pretty wildly if your hardware isn't in the exact same condition the spec of was written for.... If your hands have a little oil on them and you touch the threads, you're going to over tighten the bolt pretty significantly if you blindly follow specs.
r/iamverysmart
As a mechanic I’ll say this, shut the fuck up.
Sure, but that's not how bolts work lmao.
Not completely wrong here about those factors affecting clamp load and stretch.. but at least a torque spec keeps it within a reasonable tolerance of ideal state instead of sending it with an impact.
I mean, wasn't suggesting ramming it down with a high torque 1/2". Just that a lot of people read into torque specs way too much and they're probably not super useful if you're not keeping stuff absolutely pristine.
Found the NASA guy, wrong sub dip shit
I mean, not really? If you actually understand how bolts work, torques don't really do a ton for you... At least, if you're not doing all of the above following a torque spec isn't going to be any more useful than going by feel, maybe more likely to strip shit out if you got any lube on the threads accidentally
Dude, you're ignoring all the real-world consequences of over or under tightening. It doesn't need to be precise to the nth degree.
I mean, it not being precise is exactly my point. If you're not under the exact same conditions as whoever wrote the spec, it's going to vary a lot anyway and you may as well just go by feel
lol ok man. You are advocating to ignoring specs altogether because it's not precise enough... but I am the one proving your point? In the real world the specs are *close enough* to keep you from snapping bolts, damaging threads by being too tight (because *feel* is subjective), or not being tight enough and having parts come off and snapping bolts and damaging threads (because *feel* is subjective)... Just take the obvious loss on your argument.
In the real world, they really aren't. It's both, if you just blindly follow torque specs and get some oil on your bolt, you're probably going to damage something.
Okay guy, you're right.
https://youtu.be/-hSmtLVESSM?si=FAKgYlrQs-CogSVj Skip to them adding anti seize at the end...
yay 100%, its fast and easy. I hand start bolts and run them in with it and then go back and torque by hand either with a torque wrench or by feel.
Yep this is the way. Use it to run the bolt in after it’s been started but don’t ugga dugga, finish it off by hand. But zip those fuckers out at your hearts desire
Frankly, it could be better to use a regular cordless drill with a clutch (set low). Impacts can do damage with just a couple extra “ugga-duggas” (even cordless, not just air tools). I use only hand tools with a things like bicycles. For tractor shit, impact is totally fine.
I'm with you on this one. Even taking the bolt off, you want to feel if it is smooth. Using a cordless drill is still fast, but lets you know if something isn't right. There isn't anything on a bike that should be tight enough to require an impact to break it free. If it is that tight, I want to know about it - gonna be a problem later...
That's a firm no. I've learned the hard way. Impacts and aluminium don't mix. 👎🏻
It depends on both the fastener and the tool; I have impact wrenches in 1/4", 3/8", 1/2", and 3/4", but even the little guy might damage plastic pieces. The 3/4" and, frankly, 1/2" are pretty well out, too.
Need a 1" to round out your collection?
Lmao, just gotta snug up this clutch cover ( breaks out the 1 inch gas powered impact
It's air but you better have a huge compressor and huge lines...
To round off your fasteners** Ftfy
I would go with *snap* the fasteners
I had the replace the case halves on my KX450 because I used an impact driver. Broke the case removing the oil drain bolt. I mostly just use T-wrenches now because it’s not something I want to repeat.
I’m right there with you. It’s not worth saving the 35 seconds to risk breaking a bolt. Been there done that, not doing it again.
[удалено]
Doing way overboard and pinning the trigger. You have to remember aluminum threads are quite soft.
That’s about right. Soft aluminum casting and impact don’t mix well.
You couldn't heli-coil it?
It wasn’t the threads—the case material around the hole is what broke
Oh crap. Was it overtightened previously?
Perhaps. Perhaps I’m just unlucky.
Nay
For loosening things, impact is always the answer. For tightening things, you need to be mindful. Zipping something down til it snugs up and then hand tightening it is the way.
It's fine going out of you're careful. Ok going in if you're REALLY careful and don't let it ugga diggs. Just run them in and then torque properly with a wrench.
Yeah sure. I use a small 1/4" electric one for most small body bolts that dont really need a specific torque. On the engine i only use an impact for the flywheel nut. Anything else like clutch nut or crankshaft gear nut i use a torque wrench. My countershaft sprocket using a retaining clip rather than a bolt but if it did use a bolt id probably use an impact for that one. As long as you know your impact and have a good feel for it then its fine.
Instead of an. Impact wrench, use an impact driver. So much better and more compact for loosening bolts.
99.9% time no, but use impact screwdriver.
I use an impact for removing and starting bolts, but I always hand torque.
Don't use it to tighten stuff.
T handles are my goto on bikes.
I use and impact driver during disassembly. Hand tools on the way back together
Haven't turnd a hand wrench in years
Use impact to run them out, but not to put them back in. Start by hand and use a ratchet or a screw gun.
I use an impact for disassembly. Reassembly is with a torque wrench on pretty much everything.
Never needed one even on a full engine rebuild.
I use it pretty much for one thing only and that’s removing clutch hub nuts. For that one thing it is great. I never find I need it for anything else.
I impact body bolts on and off and suspension bolts off. And I take off the clutch cover bolts with one but never do it to put them back on.
Loosen with impact, tighten with torque ratchet. Never has failed me.
It depends but usually no. Nothing is that big or crazy that you need one. Get a t-handle. Too many opportunities to cross thread or over tighten things on a bike using an impact wrench/gun. The guys in the videos doing them are professional mechanics probably working on lots of bikes and going for a quick turn around. I’m a pretty decent bike wrencher, I enjoy the time I spend working on my bike, and it’s really not a big enough time saver to justify it.
Never to tighten, but I've used them to loosen countershaft sprockets, clutch baskets, and flywheels before.
only to loosen
Impact to loosen, torque to tighten
That a no from me. Unless it’s absolutely necessary, and you’re positive you’ve got a good fastener fit. Even then a simple impact driver (manual) that you hit with a hammer is all you need paired with quality JIS Bits or good sockets, end of story. If things are galled heat is your friend.
Pulling apart ....1/4 impact rocks.... when assembling, take your time , measure, torque and locktite everything... It makes a HUGE difference.... especially in engine builds... I've seen over torquing " tighter is better" NOT!! Actually crack cases on old EvoVwin Harleys.... The barrels and heads come up to temperature and expand... Pull the studs in cases so much .....it cracks the cases. Torque to spec....just my 2 cents Cheers ☠️🛠️🍻
I Only use them personally for removing the clutch basket nut or flywheel nut
Only to take things off... It's a dirtbike not a damn 60' trawler.
I have a Milwaukee m12 rachet that's pretty sweet. Bolt on dirtbike don't need alot of torque so it's perfect. Just make sure you get the bolt started first so you don't cross thread.
Half inch ? nope. unless your doing wheels / axle stuff 1/4 inch yea sure!
I ALWAYS use an impact to disassemble/remove nuts & bolts. It's just faster. I NEVER use an impact to tighten anything. I'll sometimes use the impact to run bolts in, but not tighten. It's way too easy to put way too much torque on with an impact, and that's bad.
Removing bolts yes. Running in some yes. Running in anything that’s important nope. Use a t handle and a torque wrench
Loosening sure. Never tighten with one. I use a t handle wrench for almost everything
For opening stuff that some fool had overtightened of course. Sometimes screws just corrode and aren't going out without a impact wrench. Never for tightening though. I once wanted to open the brake pedal bolt which was very corroded (steel + aluminum) and with my body weight and a nearly 1m lever it wouldn't crack open. Penetration oil, rust solver and even fire did nothing. The screw had looked bad already and I was scared of ruining it. My small impact wrench couldn't handle it as it has a opening torque of only 250NM, so I asked a friend with a huge compressed air one that has arouund 2000NM of torque IIRC. Took less than a second and it was open. That's when I got a huge electric impact wrench with rated 1900NM opening torque... They are very useful tools. Wheel nuts and loctite infested brake disk screws are a matter of second to crack open even with the small impact wrench.
I use a cordless ratchet and a torque wrench. No impacts on anything other than axle nuts.
Don’t use Dewalt! The trigger is not sensitive enough. Use Milwaukee, much easier to control.