Brown & Sharpe GEAR TOOTH CALIPER Tips

In this video. I show how to use a Brown & Sharpe GEAR TOOTH CALIPER.
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[@daveharvey9625]

I worked at Brown & Sharpe Cutter tool plant ran a back off lathe making form relived gear cutters and other shapes later making the tools to cut those shapes on the back off lathe The company has an amazing history glad I was part of it

[@mrpete222]

👍👍

[@paulhunt598]

Thank you Lyle. I spent over 34 years maintaining spur gear making machinery and gear inspection machinery. In spite of this, I have never seen one of these instruments used or explained. We had a Fellows gear shaper and Barber Coleman hobs when I started in the trade. These would be replaced in the mid 90's with CNC Pfauter hob and then a Gleason grinder was added. Our primary gear inspection machine was a Lebheir CNC inspection machine. I have performed very deep troubleshooting and repair on all of this equipment and I know almost nothing about gears. We machined many thousands of spur gears, both straight tooth and helical. Our gear grinder was so sensitive that I required a .00005" indicator to set it up during some repairs. I was the first employee to purchase an indicator of that resolution and probably owned mine for a decade before the shop purchased one. A maintenance technician needs to know little about gears to maintain and repair the machinery that makes them. Our product required very high tolerance gears (Class 14 was often the target). This mandated grinding the gears. Even though I performed extensive repairs, the gear terminology and gear contour geometry characteristics was a black box mystery to me. We were exceedingly careful with gear blank center hole roundness, size and perpendicularity to the face of the gear as well as work holding arbor geometry. These characteristics seem of little concern to the home hobby machinists. Our gears were cut with hobs that came from the tooling manufacturer with all of pitch geometry magic already done. I doubt that I will ever cut my own gears. My needs don't demand this. I currently need some crude bevel gears, but it is simple to purchase off the shelf gears and custom machine the bore and shoulders to my needs. I need to master manual lathe and milling skills. A repairman knows a lot about machine tools, but he doesn't need to know much about how to use them. In my world, machinists are revered, but machinists that couldn't repair their machinery (and most can't) similarly revered us technicians. You and Adam Booth continue to teach me so much as I expand my capacity to perform hobby machining in my retirement. I need to make a trip to Streater before "you make the foolish move to the condo in Florida". I really want to meet you. Gleason is a fabulous old company known for their development of rear end automotive gear making machinery. They acquired Pfauter shortly after we purchased our Pfauter. They needed to add spur gear grinding capacity and sourced from Okuma. These were primary machines for us, but Gleason regarded both of these lines as unloved stepchildren. Getting parts and technical support from Gleason was always a challenge. Our gear grinder was equipped with a $80,000 filter and refrigerated oil cooler. Maintaining grinding oil temperature was critical to maintaining part dimensions. I think that I remember correctly that the clean oil side of the filter held 375 gallons, all that capacity to grind quite small spur gears.

[@mrpete222]

Thank you for that comment. That was extremely interesting. When I worked at caterpillar, I was amazed at the electricians and repairman

[@ohmbug10]

That was very interesting. As a retired industrial electronics tech who wore many other "hats" during my career, it's interesting to hear other people's life story. Every time I learn a little bit I realize how little I know.

[@edwardkawecki8101]

Paul Hunt, excellent reply! I enjoy reading comments like yours that are interesting and factual.

[@OleGramps53]

That was great ! Once you realized the divisions are 20 thousandth between the numbers it made it easy to read the setting. Love OLD SCHOOL !

[@mrpete222]

👍

[@OleGramps53]

So use to the 25 division on my vernier scales had me double checking and the light 💡 went on.

[@EuroclydonEng]

We've been told for years that nobody needs to completely understand gear tooth theory because custom tooling is too expensive and nobody would ever need to cut a "custom gear", but I've found that with the increased use of 3d printing and laser cut parts in product design, tooling is no longer a limiting factor, and many custom sized gears can be integrated onto prototype plastic or steel parts for cheap (cost of design time only, print time is negligible). Now this knowledge is much more relevant and we are in desperate need of videos like this to help us understand simple ways designing and inspecting our parts to a higher degree of accuracy than most conventional scanning equipment or faro arms (CMM) allow for. Thank you for for this information!

[@bettytherussiantortoise2808]

What a great Sunday mr Pete uploads and my dad is bringing me to a flea market!

[@mrpete222]

👍👍

[@athrunzala5337]

@@mrpete222 Could you please talk about machining (the old way) using metal hand tools. I've seen many vintage machines dating to 2 centuries ago having dovetails!! How did they do it ? it always puzzled me, so I said to myself: "why don't you ask your old man on youtube?" :-) Thanks

[@juneyoung6357]

I have a gear tooth vernier made by Moore & Wright of Sheffield, England. I paid £20 for it on ebay a few years ago. It will measure gear teeth from 40 DP to 4 DP and like all Moore & Wright precision measuring equipment is of the finest quality, at least equal to Starrett. I live in England and almost all of my precision measuring equipment is of Moore & Wright manufacture!

[@mrpete222]

👍👍👍

[@AmateurRedneckWorkshop]

I learned how to make gears watching this channel and that led to me making gears to cut metric threads on my 12" Craftsman lathe. I can now use the quick change gear box and a couple of the gears I made to cut almost any metric thread. Thanks mrpete for a gift better than money.

[@mrpete222]

👍👍

[@aldoagnellini756]

What amazing times we're living: I'm from Italy and I can follow free lessons from an american shop teacher! Thank you for sharing your knowledge Mr Pete! (And sorry for my english)

[@mrpete222]

👍👍👍

[@tuffymartinez]

Thank You Lyle....VERY MUCH APPRECIATED !!!!!...Seriously I will watch several times...I wish my old shop teacher could have explained as well as you back in 1971. At that time I mentally skipped over the gear math stuff but now I am LOVING IT !!!!...I will be looking for a gauge ( I think there is one at work, not used in 40+ years and never will be. Left over when the machine shop was really a machine JOB shop but gone now along with the care, knowledge, desire, commitment, consideration, finesse, inventiveness )...TM

[@mrpete222]

Thanks

[@johnjohn-ed9qt]

Excellent demo. I like the magnetic magnifiers- Thank's for showing them. I now need to make up magnetic holders like those, as I have never stumbled upon any in the wild. A couple of others have mentioned other uses for the gear tooth caliper, so I figured I'd mention a critical part: calibration check. The measurement is made with the tips of the jaws, not the flats, so it is important that they are sharp and square. I keep a 0.250 (IIRC) gauge pin in the kit with mine, and the once every year or so I need to use it, check the ends of the jaws, check the depth blade calibration (lay the gauge pin on a surface plate and measure), and the span calibration (several ways here, but the easiest is to use a known good gear tooth-- NOT a tooth pitch gauge, where the tooth form may not be right on) at the measuring edges, not up in the jaws.

[@mrpete222]

Thanks

[@AJR2208]

Thank You Lyle, that did Edutain me. I've always had a thing for gears. Might be from playing with a Spirograph and Mechano sets when I was a kid. Stay safe and well :)

[@mrpete222]

Yes

[@normanfeinberg9968]

Always liked this stuff ever since I was a kid listening to stories my dad told me about the machine shops he worked in at the Brooklyn navy yard during ww2

[@mrpete222]

👍

[@123232ism]

I still have my Dietzgen (sp) Vernier Slide rule that I used in HS and college. It has a built in magnifier on the slider for "old eyes". I used fit for multiplication and division mainly, but had much trouble keeping track of the decimal point. Thank you for the lesson today. I thank God for the invention of the calculator and the digital caliper. JE

[@mrpete222]

Yes, I hated my slide rule

[@MrPatdeeee]

A very well teaching DONE. Thank you Lyle. We praise Jesus for you.

[@theodoredugranrut8201]

Wow that's some tool holy smokes them ain't cheap Watched a video "origins of precision " mentioned Brown&Sharp and the Johansen blocks . Thanks Mr. Pete , always a pleasure Central California watching

[@InssiAjaton]

Thank you for clarifying something that I have never NEEDED (luckily), but what has anyway bothered me. Around 1980 I bought a dual system -- metric and inch -- caliper. At that time you did not have digital ones and the dial ones were for either metric or inch only. So, I ended up buying a vernier type. It is a Fowler, without any part number. It has a 20-count vernier (also called Nonius) for the metric side and a 25-count vernier for the inch side.. But the distance these two verniers span are 19 millimeters and 1.22 inches, respectively. I suspect that might cause some head scratching to any novice. Anyway, the reading resolutions are correspondingly 0.05 mm and 0.001 inch. Like usual, the metric Nonius reads "directly", while the inch one requires adding a correct 0.025 multiple to the Nonius scale number at each position. Later on I have added both a dial type and a digital caliper to my repertoire. The Fowler is still in the Corduroy pouch that I bought at about the same time for a travel tool kit. And, just like you, nowadays I need a magnifying glass to read the verniers -- if I even try.

[@mrpete222]

Yes

[@ellieprice3396]

Much good information here, but Mr. Pete I read that first vernier reading as .096 and the second as .088. Maybe just my old eyes at 86 since the scale is hard to read. "Keep them cards and letters coming" as the old radio announcers used to say, except in your case they're very interesting videos.

[@mrpete222]

With my vision, I’m lucky to get within .010

[@warrenjones744]

Those magnifiers are very cool especially the second one you can separate from the base. the search begins! 😀

[@noneofabove5586]

Me too !

[@ohmbug10]

Never saw one before. Now I wish I had one a thousand times.

[@Daledavispratt]

I use a vernier height gauge..simply because it was cheap on ebay..but it's a nice old Mitutoyo and it serves me well. I like to see those old tools in use. Thanks, Mr. Pete! :-)

[@forrestgumpv9049]

I have one, and it is precision ground all over and in excellent condition. The company I worked for a long time ago, threw it in the dumpster, so I rescued it. I haven't made a gear since high school 45 yrs ago. It is tiny and you almost need a microscope to read the scale. Maybe not accurate enough for cutting today's gears, but helped get us to better methods. Excellent video, we need to work at a museum. 🤪

[@mrpete222]

👍👍

[@michaelcerkez3895]

I like a man who takes care of his precision measuring equipment and tools! Thanks for the video Mr Pete... and welcome back. We love your Edutainment.

[@fixitmakeit]

I`ll probably never need nor will i ever hold one, also until educated by Mr pete, I never new such a thing existed. Always good to learn new things. Thanks Mr Pete for the interesting edutainment.

[@aurthorthing7403]

I like to use paint or fingernail polish on the numbers and markings so they show up better. I've started doing this every time I get a new tool, whether it's metal or plastic.

[@mrpete222]

Good idea

[@seanobrien7169]

Use hot pink and no one will steal it!

[@eboneezeradams1821]

Most machinists will never have to make a gear given the availability of them, but 100% of them will at some point will need to identify a gear they are working with. Once again, great job in teaching, and a pleasure to watch.

[@MF175mp]

How do they figure out the pressure angle?

[@bcbloc02]

@@MF175mp I look at the tooth profile. The higher the number the more the tooth gets triangle shaped rather than like little clipped rectangles.

[@ramsay19481]

I have had an identical Brown and Sharpe unit and never used it.. I have cut both straight and helical spurs always being very careful of the diameter and the depth of cut and have had no problems....Glad you have a vid on the use of this gear tooth vernier... Cheers; Mike in Louisiana

[@mrpete222]

Thanks

[@joemccarthywascorrect6240]

Another informative video! Another item to look for at fleas and garage sales!!!

[@jodydoakes8754]

Being a weekend wood butcher, I will never use the information, but found it quite interesting. I like to learn, even at 75. Thanks.

[@mrpete222]

👍

[@dennisleadbetter7721]

Hi Lyle, There have been an incredible number of specialist tools developed over the years. I do own one, but don't use it often. I agree that verniers get harder to read as we become chronologically gifted! Thank goodness for digital versions! You didn't mention module gears! I'm disappointed you left more than half the world out! Oz has both! Cheers Dennis

[@irishj_21st]

I've worked with all types of gears for the last 20 years and we have a set of INSIZE gear tooth calipers, digital too,...😊. I think we spent around $400 on them. I use them before creating an unnecessary program in Gear Pro or the Gleason. If you gotta gear with a fat or skinny tooth, it'll show every time.....Thanks for the video....🤙

[@mrpete222]

👍👍

[@tindoortailgator]

Lyle, Thanks - More of Life's Mystery's Solved... Now I Can Continue My Day !

[@jblaxlinde7998]

Hello Mr Pete, I have been using Gear tooth verniers for years, while they're great for checking manufacturing tolerances, where they Excell is in checking wear, even more so when measuring accurate tapers or complex shapes that require accurate reproduction, thanks for showing folks the variety in measuring tools.

[@johnjohn-ed9qt]

You didn't mention my favourite use (the reason mine comes out most often): measuring large radii, those too large for the standard radius gauge. You can direct measure the sag and chordal length, then use the sagitta formula to calculate radius. Conversely, when forming a large radius, to check that it is correct. The limit is the usable chordal span of the tool and the needed precision, as with any three-point radius calculation.

[@jblaxlinde7998]

@@johnjohn-ed9qt that's the kind of thing I meant by "complex shapes", before I bought my gear tooth verniers I thought they were "just for gear teeth"... I was such a Reub 😃

[@pedrowhack-a-mole6786]

I almost bought one of those Starrett gear tooth verniers back when I was machining a lot of spur gears. I ended up buying gauge pins for each pitch I wanted to cut and using the two wire and three wire method of measuring the gear pitch diameter. This method was cheaper, quicker, and I think more accurate then using a vernier.

[@mrpete222]

👍

[@Siskiyous6]

Everything I know about gears you taught me, and so I probably know more about them than 99.9% of people, and yet still you have not taught me all you know, Whatever strikes your fancy go into it Lyle

[@mrpete222]

Thanks

[@edwardkawecki8101]

Excellent quick-and-dirty tutorial well done! Also enjoyed the extra credit thank you

[@RRINTHESHOP]

I am now fully Edutained. Well done.

[@mrpete222]

👍

[@dominic6634]

Calipers are usually just for reference. for finial inspection your going to need a set of Mic's and wires or CMM (which are fairly new). you can also use Z scopes.

[@rhodysweet]

Thanks Mr. Pete, another great informative video! Dave in RI

[@oldhick9047]

Always fun in a relaxing way, thanks Pete.

[@kenny5174]

Such a great video! So much information in your noggin, probably take a million more videos to get close to hearing it all!

[@mrpete222]

lol

[@gregmaggielipscomb9246]

T/Y Mr. Fischer and Peterson for sharing this interesting info.

[@MrShobar]

I can imagine many other measurement situations where this tool would be useful. I seem to recall that Tom Lipton has used one on a few occasions for measurements on objects other than gear teeth. In a production environment, I think that an optical comparator would be more commonly used for inspection, at least on smaller (spur) gears. Great video, as usual. Many thanks.

[@pjhalchemy]

Thank You Mr. Pete, very informative and simpler to use than I thought especially with the tables. I think it might be something a machinist would use on first inspection but would bet that sample inspection of modern stuff is measured on a vision system. Always a pleasure to learn about a new tool, Thanks!

[@ka9dgx]

I use them almost daily making Bevel Gears, where they are the only practical means of measuring a gear, other than fit with the mating part. When making spur gears, the blanks are always undersized, to allow for clearance in the event of run-out. This then affects the addendum, unless you measure the gear and account for the extra few thou of addendum, they will measure thicker than they actually are. This uncertainty is why most measurements are done over pins, it eliminates the dependency on the outer diameter of the gear. Great video! Thanks for all the work you do. --Mike--

[@mrpete222]

Thanks

[@ellieprice3396]

Mike, I'm wondering how you'd measure an odd tooth gear, say 19 teeth, with pins? There must be a way, perhaps with three pins.

[@ccrider5398]

@@ellieprice3396 You could to the math to figure the offset, but there are charts available that show you what reading to use to adjust for the odd toothed gear. Sometimes it's annotated on the blueprint.

[@youcoulduseit7492]

Yes always good to see you. If the shafts are'nt on a centerline that corrosponds to any two gear DP's, who the hell engineered that ... gears gone bad. it realy is a machinery's handbook or blackbook i think subject well till now I dont want to leave out the till now your explination was spot on thanks shars got one of those $70 ebay see if you can get the real deal and vintage too

[@ohmbug10]

Fantastic explanation Mr. Pete. I was so happy to see this video.

[@kimweber5094]

Nice Video. I have the same set of calipers. Thanks for explaining how to use them.

[@robertroot3044]

I am not a machinist, bu i do love gears. I am a lithographer (printer). I did work on a windmill Heidelberg in school, what a mass of gears. All printing presses have lots of gears and grease.

[@mrpete222]

When I was in college, they had an original Heidelberg in the print shop

[@phillipyannone3195]

Every tool collector should have one. I lusted after one for years but always thought they were too expensive. Years later after I was over it I found one at a reasonable price. Of course I bought it. It is a metric one made in Russia. I did the same as you, cleaned it and oiled it, and made it's own cozy little box, and it now resides in my collection, in case I ever need one. Ha ha ha... Enjoy!

[@mrpete222]

👍👍

[@jackk7030]

G day Mr Pete, thank you 👍 stay safe all the best

[@gregfeneis609]

Very nice 👌 Mr. Pete. 19:20 also if the gear gets dropped on a concrete floor the one tooth you measure could be a little fat. For a home shop, people set up tools and maybe cut one or two gears. I don't see this tool being practical for that. At a factory, they leave equipment set up to make the same gear for a long time. I imagine at the start of each shift, operators make one item and turn it in to the quality department for first article inspection. Now, production is held while somebody measures a whole bunch of first article gears. A tool like this would be very valuable for quickly assessing and getting back to production. These days, I imagine, coordinate measuring machines, and built-in automated inspection has mostly taken that effort over.

[@troyparr1659]

Hello Mr Pete, I think that your last measurement was out because you appeared to have the gauge crooked. Slightly leaning over to the right. As you said it needs to be perpendicular but I suppose that having the camera positioned thus, you weren't able to view what you were doing "square on" to the job. I imagine using those gauges would take regular practice just to keep your hand in. However, thanks for the demo.

[@boostie1005]

there are also tables for Span measurement using just a caliper over a certain amount of teeth, another use of the gear tooth vernier is when re- cutting Acme threads by machining out the wear and then making a nut to suit, helps keep a track of what you are doing, especially if the screw is long and there is more than one set up, helps you keep consistent thread thickness .

[@mrpete222]

Thank you for that information

[@ericrichards5862]

Nice tool Mr. Pete it seem that it would be easy to make an adapter that clamps onto a standard caliper that could be set using gauge blocks thus establishing the depth of the measurement.

[@CraigLYoung]

Thanks! I've seen those before but had no idea how they were used.

[@theodoredugranrut8201]

I think this stuff is fun, down to the nitty gritty no more guessing

[@tttco]

I own one myself.. I used to use mine when cutting bevel gears and also when running the thread mills.

[@CleaveMountaineering]

Oh neat! I've only seen a picture of that in Machinery's Handbook.

[@russellmcclenning9607]

Thank you Lyle very interesting never seen a caliper like that before .

[@dennismichas285]

Brilliant, eventually information on how to use that, I was given a digital one(Insize), and have never used it because I didn't know how. Thanks for the lesson👍👍👌

[@componenx]

I have shop-built gear tooth caliper with a range of about 1/4"-3/4". The tongue adjustment is made from a Scherr Tumico 1" micrometer head, and the other is an unknown satin-chrome 1" micrometer. Both are .0001" types. Upon closer inspection, the unknown mic is probably a replacement. Maybe S-T did make it?

[@mrpete222]

👍👍

[@adilmbarek5606]

So great Mr pete .tks so much

[@elsdp-4560]

THANK YOU...for sharing. Watched and very much enjoyed.

[@workwillfreeyou]

I worked at a gear manufacturing plant as a Q.C. inspector. I've never saw the measuring tool your using. They always "measured over wires".

[@mrpete222]

👍

[@EuroclydonEng]

As in "Pee Dee" wires? Like you use to inspect threads?

[@dumbo800]

@@EuroclydonEng Those are the same type of wires/pins. the PD stands for pitch diameter (which is what this device indirectly measures). A screw thread is basically a gear tooth wrapped around a center shaft, where it (usually) is adjacent to itself, just wrapped further on the shaft. I say usually because there are multi-thread screws. This is why worm gears are able to be meshed with actual gears, they are simply screws with the same pitch and pressure angle of the gear they are driving. Pins are the typical way to measure gears. You have your set of pin/wire standards, measure across the gear to the opposite tooth, and now you have your "measurement over wires" as most prints spec it. There are some complicated equations for odd numbers of teeth and for using a more standard wire size close to what is perfect (1.728/diametral pitch), as well as equations for building backlash into your spec.

[@stanervin6108]

Morning, Lyle.

[@MrUbiquitousTech]

Very interesting, thanks for sharing Mr. Pete!

[@billchiasson2019]

Very interesting to say the least! Great video as always thanks you!.

[@dannyl2598]

Thank you Mr Pete.

[@Brigantine2008]

Good video. I definitely learned something today. Thanks! 🇺🇸

[@stumccabe]

Very clear explanation. Thanks.

[@dumbo800]

You could use that on the hob to measure it, given that a hob is a rack tooth gear form. Not much use for it though, assuming you are sharpening your hobs properly or sending them out for professional sharpening. I suppose it could also be used on a single pass cutter, too, but that is much simpler to sharpen than a hob.

[@strykerjones8842]

Hi Mr Pete, I need to make 2 new gears and a splined shaft for a 1950’s Matra lathe I own. How do I determine what pressure angle the gears are? I’m not sure if I need to use a 20 degree or 14.5 degree cutter. I have never cut gears before and don’t want to make a costly avoidable error in buying the wrong cutter set. Thanks you for your videos.

[@scottvincent7666]

I have another video suggestion. Do a viewer question and answer video. I always have curiosity questions regarding machine work. Example: why do the Russian machinist videos seldom show knee mill work? They seem to do EVERYTHING on a lathe! How accurate are vernier calipers compared to dial calipers? All the Russian video makers seem to only use vernier calipers.

[@mrpete222]

That would be a good topic. However I probably could not answer most of the questions, LOL

[@lathammarx1458]

Great Brown n Sharpe gear tooth caliper. In 1631, Vernier published his treatise "La construction, l'usage, et les propriétés du quadrant nouveau de mathématique". In it, he described the device which now bears his name, the vernier scale. Almost 400 years ago, Tubalcain.

[@mrpete222]

Thank you for that important bit of technical history. Or maybe a scientific history.

[@eliduttman315]

Lyle, lemon juice is a useful chemical adjunct to the abrasive methods of corrosion removal. The juice contains 2 WEAK acids: citric and ascorbic. Citric acid is a complexing agent and ascorbic acid is a reducing agent. Those actions complement each other in getting the oxides of iron into solution and off the surface of the steel. Left on too long, even weak acids attack a steel surface. As is the case with abrasives, "take it easy breezy" and be cautious in applying Chemistry to the job at hand.

[@andrewstoll4548]

That is a very cool caliper.

[@columjevens4612]

Thank you , enjoyed that ,👍

[@robertburns2415]

I always love the silent movies.

[@ChickenLips412]

Mr. Pete, excellent video as usual. Question(s): Where did you get the magnifiers that you wear over your glasses? Who is the manufacturer? Model number? Tks.

[@mikemoore9757]

Do all of the tabulated values you show work for both 14 1/2 & 20 degree pressure angle gear teeth?

[@dabbetul_arz]

Thank you

[@tomburson5733]

Nice, pete

[@longcaster]

Excellent, sir.

[@BillyCarter91]

Do you check these for wear on the corners of the inside jaws? I have this same caliper at work and I noticed the corners are chamfered 20°x.0025 and 20°x.003 (measured on optical comparator). I think this is wear from overtightening when checking a 20° pressure angle tooth, but the guy training me said he doesn't care even though I think it's making my part .0151” oversize (measuring a rectangular part with a dimension calling for the distance between opposing gear rails pitch lines.) There shouldn't be an angle on the inside jaw tips right? It should be a sharp corner?

[@slypig24]

thanks Mr Pete, Is it more accurate if we measure over multiply teeth? does anyone have a chart for that?

[@paulerickson1906]

By my calculations the difference in price from the old price to the new price is $848.00 dollars more than it should be?

[@Mentorcase]

I sure hope you are going to make a replacement thumb wheel to replace the missing one, and video it!

[@harrygranzow9925]

Thanks . Good video

[@johnstrange6799]

Great explanation. Thank you.

[@LostMountainRestoration]

Thank you.

[@stanervin6108]

Worm driven gears have a unique profile. Correct me if I'm wrong, but i think that they are called involute?

[@MF175mp]

They probably are involute, just as all hobbed gears and rolled splines etc. Are

[@stanervin6108]

@@MF175mp Thank You! 🙏

[@mikenixon9164]

Interesting

[@gabewhisen3446]

Glad you did this video , I'll never need to do it but it definitely is worth knowing also if you saved 1,000,000.00 in 1945 it would be worth 21,000 today in comparison so inflation is a way of stealing your savings hmmmm

[@brucetuckey7909]

Good morning Mr. Pete, Great information on the tool. Keep up the teaching in your videos. I have never used one of these. Don't give it to your dentist because he will use it to extract money from your wallet. Coffee time.

[@chasingcapsaicin]

Stay safe, stay in the shop. I noticed you were not quite square on the last measure, confusing that your reading did not seem to match the display. You should do a bit on the difference using 1/10,1/15,1/20,1/25 .0001 and calibrating a vernier like that having an adjustable scale with known standard IE. feeler gauge/block.

[@infoanorexic]

be aware that while working with/around a camera, it may not see things exactly as he does. I've noticed, several times, where the camera view of a dial indicator looks like it's half a mark off when the video producer says it is "dead on" the mark.

[@mrpete222]

Yes

[@slashmaster2]

Can build this from 2 calipers if it 's so expensive.

[@HansFormerlyTraffer]

I guess you ARE an insomniac....I thought I was the only one. You video makes me want to make some gears so I can measure them with that cool caliper.

[@EddieVBlueIsland]

That gage needs to be coated with paraffin wax for corrosion protection - something I started doing with alot of my steel instruments.

[@rootvalue]

Already love it.

[@tonypike5785]

So...does the home hobby shop need this tool ?

[@ccrider5398]

Do you cut gears? And if you make a fly cutter to cut the gear instead of using a set for the proper DP, you definitely need one.

[@clifffiftytwo]

I enjoyed the video but I have got to brush up on my vernier skills. Looking on eBay, these things are still pricey!