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xzzy posted:That's how I did the rear axle nuts on my VW. I weighed myself, did the math for where on the cheater pipe I had to apply my weight, and stood on the bar at that spot. Stood very smoothly without impulse I presume.
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Sep 23, 2016 14:12
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Data Graham posted:Stood very smoothly without impulse I presume. Of course not, that's not how you tighten things! I wanted the tire shop experience so I bounced on that bastard like it was a trampoline.
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Sep 23, 2016 14:25
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tactlessbastard posted:Christ on a crutch, I've been changing and rotating tires on my personal fleet for twenty freaking years with the 'tighten down with a four way by foot roughly as hard as it was to break loose with your foot in the first place' method and I have never had a wheel come off, a stud or lug nut break, anything. Same. I use a torque wrench on my spark plugs after learning that aluminum motors are more mushy than steel motors, but I still just use whatever 4-way or breaker bar is laying around.
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Sep 23, 2016 14:35
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If you aren't properly torquing all the screws in your IKEA furniture to spec, you can just get out.
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Sep 23, 2016 14:37
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Torque the important poo poo. armstrong the stuff that can't kill anyone. it would take a gently caress of a lot to strip a stud on the bus... 500lb-ft lug nut torque.
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Sep 23, 2016 16:20
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Clearly what we need is a
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Sep 23, 2016 16:46
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Sudo Echo posted:Imagine having to carry an adapter for fuel nozzles. Why imagine? https://www.youtube.com/watch?v=vLdBEtaSaSk&t=30s
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Sep 23, 2016 17:10
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I use a torque wrench on my lugs not to make sure they don't fall off but to make sure I can undo them in the future. Every time I do them gudntight, they're a huge pain to get off after months of exposure, especially if I have a flat and need to do it in the rain. With a torque wrench, I know they won't fall off, but they also come off with minimal force on a breaker bar when I need to take the wheel off.
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Sep 23, 2016 17:18
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tactlessbastard posted:Christ on a crutch, I've been changing and rotating tires on my personal fleet for twenty freaking years with the 'tighten down with a four way by foot roughly as hard as it was to break loose with your foot in the first place' method and I have never had a wheel come off, a stud or lug nut break, anything. In that case, it'll obviously never happen to anyone.  Realistically, it's probably pretty rare that anyone overtightens a dangerous amount using hand tools. But I've known people to undertighten without realizing it. And you're supposed to retorque after driving for a few days, which is pointless if you don't know how tight they are to begin with. CharlieWhiskey posted:Same. I use a torque wrench on my spark plugs after learning that aluminum motors are more mushy than steel motors, but I still just use whatever 4-way or breaker bar is laying around. Yeah, I learned that the helicoil way.
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Sep 23, 2016 17:36
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I have a torque wrench that's probably as old as I am, I have to kind of squint to see some of the numbers on it, I have no idea if it's in spec, out of spec, completely wrong, or what. But at least I use the same torque wrench for everything so everything should be equally wrong!
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Sep 23, 2016 19:04
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DethMarine21 posted:Clearly what we need is a This is such a good idea I can't believe nobody's thought of it sooner.
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Sep 23, 2016 19:52
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Sudo Echo posted:Imagine having to carry an adapter for fuel nozzles. Try driving an LPG car in Europe.
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Sep 23, 2016 19:54
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PCOS Bill posted:I have a torque wrench that's probably as old as I am, I have to kind of squint to see some of the numbers on it, I have no idea if it's in spec, out of spec, completely wrong, or what. You can test it using a fish scale, just hang it a foot from the drive end, pull on it, and see if the wrench clicks at the pounds it's set to. You first have to make sure the fish scale is in spec though, to do so put a jug on a bathroom scale, pour various pounds of water into it, and hang the jug off the scale and see if it matches up. The bathroom scale might be off, so first get your torque wrench . . .
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Sep 23, 2016 19:57
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When torque wrenches go out of spec, what direction to they go? Too loose or too tight? I always assumed it would be the latter, which would also be a safer way for it to go.
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Sep 23, 2016 20:07
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This is my torque wrench this is my gun This ones for torqueing this ones for 'fun'
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Sep 23, 2016 20:09
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stump posted:When torque wrenches go out of spec, what direction to they go? Too loose or too tight? I always assumed it would be the latter, which would also be a safer way for it to go. My thought is it would undertighten due to the spring wearing out and weakening.
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Sep 23, 2016 20:11
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ionn posted:I predict single-use lug bolts that shear off when tightened to spec torque, and the part that's left reveals an inverted 5-sided torx (looking somewhat like a pentagram) that can be used to maybe sometimes get the bolts off when you need to remove the wheel. Each car manufacturer will have slightly different ones, with their own exotic sockets. They will be similar enough though that you can just get the wrong socket on and ruin the bolt. In all seriousness, Apple uses those 5-pointed torx screws on their macbooks. The technology is already out there, someone just needs to patent this new method
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Sep 23, 2016 20:18
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Water makes a good test weight, 1 litre = 1 kg at 20C Americans will have to do math for US gallons & decimal pounds. (so weird) When I worked in a measurement lab the test rigs were loadcell based, we had 3 different rigs. Good wrenches rarely got out of spec if not knocked around. Quality tools could be re-calibrated as well. I found the Warren & Brown to be the most accurate. Snap-on were a mixed bag. Bahco is a decent choice as well. We binned a lot of cheap Chinese stuff... wildemere fucked around with this message at 20:50 on Sep 23, 2016 |
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Sep 23, 2016 20:40
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1 Gallon of water = 8 pounds.
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Sep 23, 2016 20:46
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stump posted:When torque wrenches go out of spec, what direction to they go? Too loose or too tight? I always assumed it would be the latter, which would also be a safer way for it to go. Both and depends entirely on the wrench, style and what happened to it.
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Sep 23, 2016 20:47
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Xy Hapu posted:The bathroom scale might be off, so first get your torque wrench . . . Use tap water. Close enough.
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Sep 23, 2016 20:48
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CharlieWhiskey posted:Same. I use a torque wrench on my spark plugs after learning that aluminum motors are more mushy than steel motors, but I still just use whatever 4-way or breaker bar is laying around. I learned this the hard way when changing the spark plugs on my then-new (to me) Volvo 760 Turbo. Managed to cross-thread one spark plug while torquing them all down in the same hamfisted manner as on any iron block/iron head American car. Cue that very same spark plug getting blown out of its socket during the test drive.
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Sep 23, 2016 21:00
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Platystemon posted:Use tap water. Close enough. At least for baking it's recommended to measure your water by weight instead of volume, because volume measures can be quite far off. Clearly, the solution is to buy a nice graduated cylinder so he can measure the calibration-water precisely enough. Computer viking fucked around with this message at 21:06 on Sep 23, 2016 |
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Sep 23, 2016 21:02
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Computer viking posted:At least for baking it's recommended to measure your water by weight instead of volume, because volume measures can be quite far off. Clearly, the solution is to buy a nice graduated cylinder so he can measure the calibration-water precisely enough. Grow some ultrapure silicon crystals, grind one to a perfect sphere, count atoms, and apply Avogadro’s number.
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Sep 23, 2016 21:10
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This empty quote button sure is annoying.
-Zydeco- fucked around with this message at 21:19 on Sep 23, 2016 |
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Sep 23, 2016 21:16
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Platystemon posted:Grow some ultrapure silicon crystals, grind one to a perfect sphere, count atoms, and apply Avogadro’s number. I guess, but setting up the laser interferometer to measure the diameter seems like it could be a bit much for a weekend project. If he could borrow one of the retired metre prototypes I guess it would be OK... (The silicon spheres are obviously worth the slight extra effort.) Computer viking fucked around with this message at 21:26 on Sep 23, 2016 |
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Sep 23, 2016 21:23
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I had the idea for fasteners that had a designed shear failure at a set torque. You could install them, tighten till they sheared off and know they were at the spec'd torque. Then I asked my mechanical engineer brother who was doing an internship at Boeing about the idea and was informed that they are common in aviation manufacturing.
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Sep 23, 2016 21:28
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Mercury Ballistic posted:I had the idea for fasteners that had a designed shear failure at a set torque. You could install them, tighten till they sheared off and know they were at the spec'd torque. Then I asked my mechanical engineer brother who was doing an internship at Boeing about the idea and was informed that they are common in aviation manufacturing. It's also used in racing series with sealed engines. http://www.circletracksupply.com/break-off-bolt-kit-crate-602-603-604-gm.html quote:Sealing bolt installation: Torque heads, intakes, front cover and oil pan with stock bolts in all locations prior to installing sealing bolts. After final torque is done, remove stock bolt and install sealing bolt and tighten until head breaks off. Do not install sealing bolt first.
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Sep 23, 2016 22:00
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The Door Frame posted:In all seriousness, Apple uses those 5-pointed torx screws on their macbooks. The technology is already out there, someone just needs to patent this new method In all seriousness, if one of the manufacturers does decide to use this method, I'm hunting both of you down with edged weapons.
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Sep 23, 2016 22:11
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Johnny Aztec posted:1 Gallon of water = 8 pounds.  8.34 lbs. (sorry, that matters when you're a hose monkey and calculating poo poo like when you're likely to destroy thing - so it also seem relevant when using it to measure torque)
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Sep 23, 2016 23:03
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Motronic posted:
"A pint's a pound the world 'round" innit? Plus, a pint is 16 fl oz, and isnt a fl oz of water 1oz weight? And there's definitely 8pt in a gallon. So where's the extra change come from?
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Sep 23, 2016 23:17
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Raluek posted:"A pint's a pound the world 'round" innit? Plus, a pint is 16 fl oz, and isnt a fl oz of water 1oz weight? And there's definitely 8pt in a gallon. So where's the extra change come from? https://www.quora.com/How-much-does-a-gallon-of-fresh-water-weigh
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Sep 23, 2016 23:23
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Fluid ounces are a horrible metrological failure.
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Sep 23, 2016 23:37
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I just thought the whole deal with fluid ounces was that, when the fluid was water, they weighed an ounce. I guess not? 
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Sep 23, 2016 23:42
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Raluek posted:I just thought the whole deal with fluid ounces was that, when the fluid was water, they weighed an ounce. I guess not? No, that's metric you're thinking of, 1cm3 is 1g
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Sep 23, 2016 23:43
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Slim Pickens posted:Am I the only one that just uses an 18" breaker and tightens it so it feels really snug? four-way lug wrench in my case, but no. Never had a problem with it either. tactlessbastard posted:Christ on a crutch, I've been changing and rotating tires on my personal fleet for twenty freaking years with the 'tighten down with a four way by foot roughly as hard as it was to break loose with your foot in the first place' method and I have never had a wheel come off, a stud or lug nut break, anything.   CharlieWhiskey posted:Same. I use a torque wrench on my spark plugs after learning that aluminum motors are more mushy than steel motors, but I still just use whatever 4-way or breaker bar is laying around. I use a torque wrench on: - wheel bearings (since the axle nut or spindle nut is what controls bearing preload) - bearing cap bolts in diffs, crankcases, overhead cam heads, etc (since the bearing race going out of round is usually a bad fuckin' problem) - pinion nuts (again, bearing preload) - flywheel and pressure plate bolts (because I like my feet remaining attached and my crankshaft bolt holes unstripped) - harmonic balancer bolts (since I like my crankshaft bolt holes unstripped, and they're often TTY) - diff ring gear bolts (since uneven torque can warp the ring gear and cost me 3 figures in parts alone) - head bolts (I like my heads unwarped and my head gaskets sealing) Basically, anything that can be summed up as "spinny expensive things and enginey expensive things". I can crank on lug nuts with a 4-way and recheck at 25/50/100 miles as I see fit and it won't kill me or ruin anything, and I've never lost a wheel or stripped/broke a stud or nut this way, except that time I forgot to clean the icy mud off the mounting face of the wheel because it was late at night and I was pissed off and tired and cold as hell. The torque was fine, but the mud and ice worked its way out from between the drum and wheel and 50 miles later I heard a funny noise and had to tighten all the lugs a handful of turns. Mercury Ballistic posted:I had the idea for fasteners that had a designed shear failure at a set torque. You could install them, tighten till they sheared off and know they were at the spec'd torque. Then I asked my mechanical engineer brother who was doing an internship at Boeing about the idea and was informed that they are common in aviation manufacturing. Very commonly used in steelwork as well - buildings, bridges, etc. Tension control bolts and a proper power wrench to torque them till the tip shears off. The real benefit is you can have one dude up there with a power wrench, a sack of bolts, and a spud wrench, and he can slam the bolt through from one side, spin the nut on a little, hold the bolt in and gun it on with the other hand without needing to keep the head from spinning. https://www.fastenal.com/en/79/structural-bolts (search on page for "tension control") e: fluid ounces vs volume ounces and pounds, pounds force, and slugs are right up there with metric horsepower on the list of engineering bullshit that I hate. Seriously, 1 SAE horsepower is 746 watts, a stupid number but at least it's an integer... 1 metric horsepower is 735.499 watts. It's me-too bullshit applied to the metric system and also the biggest turd in the punchbowl, they should have made it 1kW if they were going to do something stupid, but it's not far enough off to be a nice round number in the SI system and it's just close enough to real horsepower to make you wonder which kind of horsepower is being specified. gently caress
kastein fucked around with this message at 23:47 on Sep 23, 2016 |
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Sep 23, 2016 23:44
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Terrible Robot posted:In all seriousness, if one of the manufacturers does decide to use this method, I'm hunting both of you down with edged weapons. I Will bring the tar and feathers.
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Sep 24, 2016 00:05
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Raluek posted:I just thought the whole deal with fluid ounces was that, when the fluid was water, they weighed an ounce. I guess not? Water has just become heavier over time.
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Sep 24, 2016 00:59
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Can I use a 1/2 inch (or maybe mine is 3/4in) torque wrench on spark plugs? Or is it too big?
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Sep 24, 2016 03:02
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Pigsfeet on Rye posted:Water has just become heavier over time. Model bloat.
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Sep 24, 2016 03:17
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