How to Use a Tachymeter Watch Bezel

www.grayandsons.com/ teaches you how to use a Tachymeter watch bezel.
A Tachymeter scale is a scale sometimes inscribed around the rim of an analog chronograph watch. It can be used to compute a speed based on travel time or measure distance based on speed.
The function performed by a Tachymeter is independent of the unit of distance (e.g. statute miles, nautical miles, kilometres, metres etc.) as long as the same unit of length is used for all calculations. It can also be used to measure an industrial production process in units per hour. A tachymeter is simply a means of converting elapsed time in seconds per unit, to units per hour.
A tachymeter-equipped watch can be used to measure distance by timing the travel over the distance while the speed is held constant. When the second hand reaches the point on the scale where the speed indicated equals the speed of the vehicle, one unit of distance (miles if speed is miles per hour, kilometres if kilometres per hour, etc.) has been covered. For example, if you travel at a constant 80 mph (or at 80 km/h), then the distance traveled while the second hand sweeps to "80" (45 seconds) will be exactly 1 mile (or 1 kilometer at 80 km/h).
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Gray & Sons Jewelers specializes in buying & selling fine preowned watches and estate jewelry. To view more Rolex Daytona watches visit www.grayandsons.com/fine-watc...

[@Lilbizkit]

I used my tachymeter to calculate that the narrator was talking at a rate of 137 words per second.

[@victor7491]

eminem's hidden passion seems to be narrating watch videos

[@timsummers870]

A tachymeter is something that 99.99% of the people who have it on their watch never needed or knew how to use it. After watching this video, 99.99% of said people will continue to never use or need it, let alone understand what the fuck a tachymeter is good for.

[@Abhi140294]

If you were ever lost in a forest with no Mobile network.. use it.. until then.. enjoy

[@iRDude415]

@@Abhi140294 I use it as a timer(what most people do) and as a compass. I Do the 'ol boyscout trick to find north and south and pause the chronograph so that the chrono second hand points north but I veeeerrryyy rarely ever use it as a compass lol

[@raghwendrapratap6050]

@@Abhi140294 hope that day will never come

[@jars7774]

Just what I thought. It makes a watch looks cool.

[@somerandomguy9156]

jars 777 true story mate!

[@TheNotoriousKID]

jars 777 😆

[@nanapoku4467]

Lolol. Lmao. 😂😂😂😂. nominate for best comment award please.

[@danielforde-pogson]

With a word nobody understands!

[@treatb09]

Today its fairly obsolete. If you had a rc car or a rc jet or helicopter. You can use it to measure average speed to moderate fuel usage so the thing wont crash.

[@pookspookspooks]

this is the HYPEST tachymeter video out there

[@adammchugh8915]

As someone trying to learn more about watch movements for my work, this was tremendously helpful. Thanks!

[@MyNiceguy22]

Now I finally know wtf that thing on my watch does... thanks, great video

[@mrmoxley]

Thanks. Simple and to the point. I thought there was some complex way of using the bezel.

[@rohanghige]

Pro tip: Watch video in 0.5x speed and you will understand it better.

[@xocoyotl4]

I want to know how many lines per hour I write. So I'm buying a $25,000 Rolex Daytona to do the measurement.

[@markdoughty8780]

Very useful upload; made a seeming enigma (the tachymeter on a chronograph watch), a lot clearer - many thanks.

[@dana8726]

Why I am watching this video.... I don't even have a watch.... 🙄

[@treatb09]

It actually measures average speed. Which is nice for fuel consumption. Along with timing laps. But if you then know an average speed. You can calculate the distance you will be driving and how much fuel you need. I do that all in my head but a watch is fun.

[@rajthapa1997]

Nice explanatory video. thanks

[@notsopassive1]

This guy's voice is hilarious. Sounds like something from South Park. Every sentence ends with his voice dropping into bass

[@liketolooker]

Very helpful, thank you.

[@madhusudhans5555]

Excellent review

[@Mrrajitha2009]

fantastic video !!

[@zzoli2oo4]

I think i didn't had my coffee yet as I don't have a clue what is that tachymeter doing even after watching this video :))

[@billybenson3834]

Little known fact is it helped getting Apollo 13 back home safely. If one is a pilot or on the ocean and loses navigation abilities, it comes in handy on plotting a course.

[@esrynshudder4216]

why tf is it so dramatic, it's just something on a watch chill

[@BloodyWallz]

Dude stfu and stop being so overly sensitive. Take your own advice and apply to overreacting.

[@silentsupreme4874]

I sent 20 grand, I intend to use the whole amount

[@virgilroberts5128]

Because it makes the tachymeter sound like a much cooler complication.

[@kevinescobar9680]

Yes thanks huge help

[@naseerahmed6805]

He said thanks for WATCHING lol get it?

[@lordbogus6709]

this mans voice sounds epic

[@devoidcaliber640]

Right? lmao thumbnail is funny too

[@oren5889]

This is completely practical for "Dead Reckoning" as a pilot.

[@nashathulhaq6477]

I think no more than 3 people on earth use this feature.

[@MarkAKathurima]

Am I the only one who got transported to circa 1972 by the narrator's voice and cadence? Lol

[@MariusWM]

Appreciate the short and precise explanation. But Im still wondering if anyone at all uses this on their actual watches?

[@RST9413]

After i presed both side buttons in same time my Fossil watch is broken 🤣

[@fruitl00p08]

I'm honestly a little bit confused... Could it be used to calculate distance traveled over a 6 or 9 minute interval, perhaps, given a constant speed?

[@frodproducer]

Coming to a theatre near you

[@danielforde-pogson]

Hilarious! The narrator sounds like he's advertising a horror film!! Useful though. Wonder how many people actually use it...

[@jonmanilenio]

i'm sure this is a great explanation... i just didn't understand it.

[@vixdevil]

Lol

[@ronch550]

Well, cars often travel at variable speeds so I honestly wonder what tachometers are good for.

[@insmallportions]

They give you the average speed over that distance which is often quite useful. Even in motor sports they give you average speed over a sector or a lap. If you think about it measuring instantaneous speed is kind of useless, it doesn't give you any predictive power. Average speeds over known distances allow you to estimate how long things will take.

[@Crazytesseract]

a tachometer is not the same as a tachymeter, by the way.

[@steveman751]

Yep it's annoying to see slide rules and tachymeters on so many watches when they're basically used by 0.1% of the people that own them.

[@treatb09]

@@steveman751 its a novelty like a compass. You never really need it until you do. Then its a life saver.

[@vasaiyanilesh558]

best

[@nowiemesina4045]

I have a winner skeleton golden watch and it has tachymeter idk where to press it use the tachymeter pls help me

[@jacobmercer7526]

So it's an advanced stop watch.. gotcha

[@zNEKOMARUz]

So basically it's just to make my watch look cool since my watch doesnt have a chronograph button.

[@tynchytemper9618]

First you'd have to speed up though?

[@sekacity3425]

Half the comments are people confusing tachymeter function with a chronometer function. I guess they need to time how fast they can get lost.

[@aadeshkeeratsingh3220]

Wowwwwwwww

[@giorassiccuriosity1796]

Did I just have a hemorrhagic stroke?!

[@watchesandcaps2566]

If I'm timing a friend driving the quarter mile and he completes it in 11 seconds it shows 240 and he's definitely not going 240mph...so how would that work?

[@drivethrutimeattack]

I'm not sure, but I think you divide it by four because you're doing a quarter mile as opposed to a whole mile, so his speed would be 60 mph.

[@yt69420]

it measures units of 1. But 1/4 mile is not a unit of 1. So multiply 11seconds by 4 and you'd get a theoretical 44sec for 1 mile. Then look at tachymetre at the 44second marker and you'd see it line up pretty much with 82, which would me 82mph on average. To reaffirm, 0.25 miles / 11 seconds = 0.02273 miles per second. There are 3600 seconds in an hour, so 0.02273 x 3600 = 81.82mph. Obviously it's going much faster at the end since it was accelerating but you could do the same sort of simple math if you were measuring 1/2 mile, just double time and look in different place on tachymetre.

[@biotechno100]

​@@yt69420I enjoyed this comment. Another thought? It's like binary 1s and 0s regarding the logic gate principle and universal math/geometry. Just a macro real world example. Does that make sense??

[@NicholasSadlier]

Cool, but as likely to be useful as a chance meeting with an alien, who then asks you how to use a tachymeter

[@aqalmandkhan17]

How price

[@craik7]

can you use tachy for more than 60 secs?

[@Echoback.]

Yes, but in another way. Let's say that it takes a watch factory 100 seconds to make a watch. You can't use 100 seconds in a tachymetre, so you just say that it takes them 50 seconds to make half a watch. It is a very interesting tool.

[@_Brohan]

Thanks I'm that much lesser a watch newb now!

[@imaadmerchant602]

So if a friend runs 100 meters and the tachymeter shows 240 then Ik he doesn’t run 240 mph per hour so how do u make it like legit

[@ackrgaul]

you divide it by ten since 100m is a tenth of 1km. So your friend ran 24 kmph (not mph)

[@imaadmerchant602]

Slim A so does the tachometer world in both mph and kmph

[@ackrgaul]

@@imaadmerchant602 yeah

[@wynn6977]

How many times a day using this function called Tachymeter, or how many times a week? If we know mph or km/ hr, what is the benefit? Everyone has mobile phone with calculator. Ask googles, will get answers within couple of seconds.

[@bradleythirumurthi]

Watched the video. Still don't understand.

[@KiwiPokerPlayer]

Bradley Thirumurthi, it's not your fault. These examples are bizarre and completely impractical. "Imagine you're in a boat traveling at 70mph and the treasure is one mile away"... What the fuck is that nonsense? And in which universe does a race car driver travel at the same speed for an entire lap? Tachymeters did have a practical use in the old days when computers didn't exist but these days they are obsolete. In reality, they're just a thing to make a watch look fancy. If you really want to know how to use one, find another video because this one is horse shit.

[@carlose6010]

If you don't understand watch it again. It's similar to reading Steven Hawking's books.

[@Tenktory]

This explanation is overcomplicated. You just measure the time of any activity in seconds (t1) and all you get from tachymeter is information how many identical events could be finished in one hour (3600/t1=value you read from the bezel).

[@seanpie5481]

So. Useless if the lap is longer that 60 seconds? It does look cool though. At least I can use the bezel on my dive watch to time how long my partner takes to try on clothes in a shop. Up to 60 minutes! 🙄

[@tsunamitube3351]

Not at all. That is what 2 of the other dials are for. One counts minutes since you started and one counts hours. So you can time any lap up to 12 hours long

[@tintinlam1446]

Please...what kind of college student can afford a Breitling?

[@domjal]

One that chose thier parents wisely - winning the ‘genetic lottery’.

[@thecianinator]

2:09 the music just stops, what kind of amateur hour editing is that (awesome VO tho)

[@Kurotaka_]

Why does nobody explain what dial with 30 and the dial (in this case) with 12 written on it does? It seems that it only moves when you are using the tachymeter. To be more specific, I am referring to the top and bottom circle on the watch face.

[@lucienpetersen9010]

your question is not very clear. perhaps rephrase it?

[@Weakeyedominant]

BlackHawkRider i know im starting to think they are only a decoration :p

[@rcastro0]

One is day of the month, the other is month of the year.

[@TheJent14]

No not at all Ricardo, the 30 dial shows the amount of minutes passed when the chronometre started and the 12 dial the amount of hours.

[@DJogdog]

They're called "sub dials", on a chronograph the one that counts to 30 will be a minute counter (how many minutes have elapsed since you started the chronograph). And the one that counts to 12 would be hours (as someone else already pointed out). Also common is one that counts to 10, which would be 1/10th's of a second. Annual and perpetual calendars will often have sub dials to display the day, date and month (though some use a window instead) if it counts days the sub dial would go up to 31, not 30. If it counts months it will say "Jan, Feb, etc" not "1,2, etc"

[@rozza6068]

not more than 2% will use tis feature from a watch🤐

[@dscgtsevenhattenjr6928]

🇺🇸🌈🌎🌍🌏🗽🌟🌟🌟🌟🌟👍🏁🇺🇸

[@abhigyanpaul8188]

But how to stop the second hand on zero????

[@POPPASHANGO]

On a proper chronograph watch, the "seconds" hand is actually not the time keeping seconds hand. It is more like a stopwatch. You can start it, stop it and reset it to any position on the watch you wish.

[@ButchCassidyAndSundanceKid]

alot of smart watches can do this, but more.

[@lukkash]

This voice is like Based Zeus :)

[@timothymbronson3288]

I fully understand this borat voice "Not" lol

[@dennycouncil2282]

So... absolutely zero everyday appliance whatsoever

[@msbelindapls]

Utterly useless function in daily life.

[@daveleno2246]

Stupid explanation. No racetrack is EXACTLY 1 mile long. Better would be to explain how to calculate speed on a 2.47 mi long racetrack where the driver takes 1.18 minutes to complete. How would you know how long 1 mile is on this track?? But you can see the start and finish line. Use more practical examples, not theoretical ones.

[@astaschak]

That's easy. The average speed would be 125.59mph. speed=distance over time. S=d/t. So 2.47÷1.18=2.09miles per minute. Multiply by 60 and you get miles per hour. And there are 1 mile tracks. I don't know if any circuits that are a mile but drag races can be a mile long. Having numbers you stated already gives you the answer. The tachymeter helps measure the time and the scale on the bezel simplifies some of the math if I understand it correctly.

[@samali9913]

Useless function now days

[@ianingham5713]

Nobody never ever will use this stupid complication! lt might give you a very very rough idea of how fast a car is traveling,but speeds are measured by computers accurate to hundredths of a second etc.So let's be honest,lovely watch admittedly,but totally useless practically

[@virtualRod]

some of these comments remind me of a recent comparison of F1 drivers; Verstappen v. Senna, the modern driver (taught on toy carts & simulators) mostly uses modern computers (and a pumped ego) & a team of +/- 50 (+ their gf attracted his millions) that leaves him to simply steer & bitch & moan when his opponents overtake him, where a vintage driver uses decades of practice, *a tachymetre*, real world/track time experience & 2-4 other technicians to prep. & maintain a machine made by men, for men in a man's sport.

[@daveleno2246]

@@virtualRod you forgot to mention, "while being encased by 2 highly volatile fuel tanks, that would let you go up in a great ball of fire, in each crash, so you would damn sure make sure to drive as precisely as possible and not risk everything each time like stupid, dumb Verstappen.

[@Crazytesseract]

There was more than one watch in this video... which one are you talking about?