How To Balance an Engines Rotating Assembly

Check out Kalvinator Engines: www.kalvinatore...
Extended Version of this video available here: www.ericthecar...
For those of you not aware, the engine in my #FairmontProject has a name, #DarkMatterPikachu. Here's how it got that name.
• How #DarkMatterPikachu...
In this installment of the Engine Build Series of the #FairmontProject, Kevin Frische shows us how to balance a rotating assembly. Some may know this as 'balancing the crankshaft' however, this is something of a misnomer in this case because we also include the flywheel and harmonic balancer.
Honestly this is one of my favorite videos in this series as it covers something I've never seen done before. So the next time you're getting an engine build, I'd highly recommend getting your rotating assembly balanced. Especially if you're going to be using an aftermarket crankshaft. If not, it could mean a short life for your new engine. If you do opt for this service, you'll have a smooth, fast revving engine.
Previous video in the series: • #DarkMatterPikachu's E...
The #FairmontProject playlist: • ETCG Gets a New Car! -...
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Camera: Brian Kast
Thanks for watching!
Discussion about this video: www.ericthecar...
Engine Details
Displacement: 363cid
The Block: www.pbm-erson.c...
The Crank: www.pbm-erson.c...
The Heads: performancepar...
Compression: 8.9:1
The Cam: Comp Cams custom grind: 222@.050" 222@.050 .357"lobe lift .571" valve lift (1.6 rocker) .351" lobe lift .562" valve lift (1.6 rocker) 114º separation 4ºadvance
Modified: Edelbrock Performer RPM intake
The Carburetor: www.holley.com...
The Distributor: www.msdperform...
The Ignition: www.msdperform...
The turbo Kit: www.on3performa...
Related Videos
The #FairmontProject series: • ETCG Gets a New Car! -...
#DarkMatterPikachu on the Dyno: • The #FairmontProject E...
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Due to factors beyond the control of EricTheCarGuy, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. EricTheCarGuy assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. EricTheCarGuy recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of EricTheCarGuy, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not EricTheCarGuy.

[@gtoger]

It's really relaxing watching a machinist do his work. Nice to see a pro at work. Thanks for the field trip, +EricTheCarGuy

[@fooey88]

Man, this guy is a wealth of knowledge in terms of engines.

[@drtracernum20]

this guy is a damned good professional. wish there was a machinist like him in my area.

[@artemiasalina1860]

He also seems like a good guy to work for.

[@bigwillypacino711]

DodgeRam HEMI FIXES and your point is?

[@bigwillypacino711]

DodgeRam HEMI FIXES wow I didn't know that working in a machine shop makes you a mechanic ? Oh that's right he's a millwright ‼️you don't know SHIT SON but here's a ⭐️ for your efforts

[@dodgeram8793]

waste more of ur no life reading my comments sweatheart xo love you!!xo

[@wysetech2000]

Very well done. I have had engines balanced and have seen balancing procedures but I have never seen it so well explained.

[@dopefishlives]

That guy is awesome; he has such a great attitude toward his work and is clearly exceptionally skilled without any sort of pretense. I love machinists and dearly wish I could have spent my youth around one, learning the magic of metal.

[@deankay4434]

Eric, this is BEST video, explanation and exposing the mystery of crankshaft balancing on KZbin ever. I still can’t exactly gasp my mine on the procedure of positioning the weight at the correct location of angle of the weight clamp blocks. I get the weight of two loaded rods on one journal, but the position has to be a relationship of the two at the top when the stop, as the bottom is still rotating. 98% of my visual skill-set has captured and saved to long-term memory of the entire process. I can only save enough in an early medical retirement from long days of hard work to get into a machine shop to get a clear idea of the counter-weights position to be clear, but Eric, you and you machine shop buddy has taken me miles on the reciprocating assembly & machining process in the back room. I was lucky at 13, to work for a two man shop (Owner and me) who told me he learned more about engines in 7 years in a speed shop machining back room, than he learned in 28 years in a Chrysler dealer. I was the apprentice sponge and his gentle even manner taught me well. WoW! When I grow up, I want a 20” wide belt sander with a 3 foot bed. Thank very much, so enlightening Eric! Long time subscriber. ASE Master Tech since 1978 - Retired PS. June 17th 2020 is my last lumbar fusion at the L3-L2 level at my shoulder blades. The rest is fused and makes it hard for a 6’3” guy to pickup anything dropped. It’s just one of 3 more metal parts I need, at 62! Pain sucks and working from 7AM to 9PM for decades, isn’t the whole reason, but most of it, except for my lumbar caused by one boss man. Hope we never meet.

[@YOUPSYCHO]

Man the way this guy is full of knowledge and the way he explains it makes me feel comfortable, to the point that I am thinking about rebuilding my engine and not get taken for a ride when I go to the machine shop.

[@vetterfellow]

A special note to Kevin Frische, Thanks for being A good teacher to our friend Erick, We know he's a pain in the butt with all his questions. and his side kick Brian following you all around. Your a good Dude to put up with our Friends from ETCG. TTFN.

[@mannys4539]

as a steel fabricator and auto technician... I love this video!!! I'd like to visit my uncles shop but he's a few states away...thanks for allowing me to peer into the world of engine machining!!!

[@zx8401ztv]

It looks so crude drilling large holes, but thats just quickly removing most of the error weight, then the fun starts for real. Slowly creaping up to the limits without overshoot must have taken bloody hours!!. I like him, he wants it right, and he will get it. Well worth the cost for perfection eric :-D.

[@ericthecarguy]

Yea, he worked on this for more than 3 hours. Fun fact: the lighter your pistons and rods, the harder it is to balance the assembly.

[@Blazer02LS]

True, and you are not using the lightest stuff out there. That's when you get to start doing knife edging and radius grinding the trailing edge, shaving the weights on the grinder and more. I was building for a couple teams who refused to have holes in the weights and ran some of the lightest parts they could get. Don't miss those at all...

[@andyca15]

I've considered the option of a fully rebuilt engine like this and the parts to rebuild it yourself. Now I understand why the second option is so much more expensive and worth every penny! This was a great video, thanks Eric for making it, and thanks Kevin for sharing what you do. Awesome!

[@wobblysauce]

++

[@Blazer02LS]

Andy C This is FAR beyond a typical rebuild, this is a full custom engine. Good machine work costs $$ For a "normal" rebuild you can figure about $700-1,000 if you DIY most of the items and limit the machine work to a cylinder and line hone. Or you can go all out and easily drop 30-40K into the engine. The all out race engines I built ran crankshafts that were over $3,000.00 each! And they still needed to be worked some. As the saying says $peed Cost$ Money How Fast do You Want to Go ...

[@johnsmith-sw7ii]

Kevin seems like a really pleasant knowledgeable guy. Interesting video.

[@TakeDeadAim]

Nice to see a machine shop which LOOKS like a machine shop. I see so many high tech, CNC shops which look more like medical research labs. I retired, but got roped into working part time for a friend at his shop and it's also more "old school". As a matter of fact, still have all dial calipers and mic's...Very nice older machines. A couple are digital but no real "computerized" machining at all.

[@Dakota-je9os]

I love when you make longer videos.

[@wilianoliveira2524]

Didn't know this amount of work was involved in engine building. Insane! Cheers Kevin and Eric!

[@BigDog50001]

Not too often you get to see inside a machine shop, nice one Eric.

[@deeremeyer1749]

Apparently you're not a "mechanic" or even a "DIYer" if machine shop visits are "not too often" in your world.

[@sigmaprojects]

@@deeremeyer1749 Pretty sure he's talking about builds online. Usually they just come back with the finished product.

[@user-zg4gx9zq9b]

I see the inside of the machine shop every time I send my engine parts out to be machined lmao. I even shoot the shit with my machinist.

[@christopherhylton8462]

Very informative video. I worked in a machine shop when I was younger, never got to this guy's level of mastery, but machining can be a very humbling experience. You can take metal out, but it is hard to put back in.

[@stevesolo16]

I've done this quite a few times. This is where the magic starts to happen. Without a balanced bottom end and the time taken to do this correctly, you can spend all the money in the world and will never get the performance you are paying for. That said, you do get what you pay for as the more expensive cranks i.e. Bryant Co. etc are spect to a much tighter tolerance then lesser expensive cranks. There are no shortcuts. You've got to take the time. A pleasant, informative video seldom seen on KZbin. Well done guys!!

[@sanghyub95]

damn people who actually take there time to rebuild the engine with accurate measurement and actually checking cam lobe, piston clearance, deck warpage and checking crankshaft journal, etc has alot of patience... i admire them

[@brandonknight7240]

This is the video i needed, im building a 331 stroker and this balancing issue has worried me sick knowing something needed to be done but not have a clue on what to do so this helped

[@swigga4O]

these machining, precision, and calculation videos are always relaxing haha

[@ruudxd1]

So awesome to see a guy with such knowledge at work! I am 19 and starting a study to be a mechanic so, goals here :-)

[@benjaminbaker2778]

kevin is the man, his attitude to the work is what great engineering is based on, thanks for the vidja Eric.

[@bmw540i]

"Between me and the machine, I take it personally!" Love it, proper craftsman! If your gona do a job, do it properly!!

[@nadroj3968]

wow so much involved in building a performance motor Watching video's like this helps me appreciate more the Great blokes that built my Motor for me

[@C.J_the_Goat]

This is so fascinating. I am late to the party here but wow, the amount of high precision that goes into my trips to the liquor store is amazing! Machinists are a valuable profession.

[@trefod]

Mesmerizing. What you do to avoid this is buy a crate engine, but it must be so much more satisfying to have had a hand in every component of the engine, fiddled with and nursed it into shape. If only I didn't have work, family and friends to attend to, I'd be happy to spend my life constructing things with care and precision.

[@JoshSfaks]

This is cool. I took and engines class 2 semesters ago at Cypress College and we built about 15 350 small block chevy engines for SEMA for the engine building competition there and this just reminds me so much of what we did. Bore out all of the cylinders, Hone the cylinders so you get a nice cross hatch finish. Do all the lifters, pistons, rings, camshaft, crankshaft, all the bearings. I learned a lot.

[@steelcity3474]

What a lot of people don't know or understand is, guys like this are a dying breed, For every 10 that retire maybe one comes into this business with the knowledge, skill, and the will to do this everyday all day long. Kinda like that old George jones song, who's gonna fill their shoes?

[@ryanwojcik1087]

I plan on designing and building my own engine from scratch. I must have spent 3 hours on Google, and asking my friends dads about balancing crank shafts weeks agi. This is prolly the most amount I have learned all summer honoestly thank you.

[@IHcubcadet]

Wow I never realized how much work goes into balancing an engine. Great job guys!

[@MagaRickn]

Excellent eye opening video!! Fixing to have an engine balanced, my first, hope I get a guy like this to do my work!

[@MrS22222]

I love seeing people doing what they enjoy.

[@LynxStarAuto]

Kwik-way head surfacer, one of the greatest resurfacing machines out there👌🏽. Low maintenance, easy to use, and most importantly fast, fast, fast. Love the Kwik-way.

[@octymocty132]

fantastic to see some one else who spent time sharpening bits . i had to way back on my appernatship is dose pay and an old school shop another rarity i could spend long hours making t a listening an learing from that dude as well as eric

[@ethanwelch6345]

He does very good work and I hope his honesty doesn't go unrewarded

[@rhkips]

Balancing is such a fun process! I was taught from the get-go to shave the crank when possible, but it can be a lot more work, and time is money! I once managed to balance an entire rotating assembly to within 0.25 grams--the margin of error of the equipment I was using. Getting to that fine of a tolerance really has no place on a street car, but it was fun just to see if I could do it. Took me the better part of two days, though.

[@orygunchainsawmassacre6761]

I think Kevin should start up a KZbin channel.

[@calvinhart6793]

Man, this guy knows, ALOT. And boy are you getting on his nerves. Please stop interrupting him. Great video

[@adamreily7079]

Yeah, was gonna say the same thing.seens like he was starting to get bothered by answering all the questions

[@Nope-un5lq]

Kevin is a MASTER at his craft! I would LOVE to pick his brain just to learn a fraction of what he knows about engine design and theory. GREAT video, Eric! :-)

[@Nope-un5lq]

Oh, and the often un-sung hero, Brian! Another great video production!

[@kyletesene1414]

Great video! Kevin is a genius in his field. Awesome to see a guy explain something so complicated into layman's terms.

[@gristlevonraben]

i learned so much in this video about the mechanical properties of my car, very very cool. I appreciate you both very much.

[@spencer8988]

I can't believe I watched this whole thing, That was really cool.

[@mikwid7805]

Every day is a school day. This is so interesting and presented in a real down-to-earth way without being patronising. Excellent. And Kevin could do voiceovers for John Goodman!

[@hydranmenace]

Hahaha. I know people can complain about sponsored videos but I think it would have been kind of fun if this were sponsored by Sharpie! :P

[@docstruthers]

I could almost open a motor machine shop with all the info this guy shares! Great video gents!

[@randylamountain5916]

Your sleeper is getting out of control, I LOVE IT!

[@johncunningham4820]

That was fascinating . I knew what balancing was all about . The WHY . But never seen it done before .

[@cahyowinarko6652]

nice explanations dude...!! not just a video of someone doing something that not everybody understand the processes

[@approachableactive]

I do like these in location videos or "Expert" videos Eric. seeing the specialist processes helps dispel so much misinformation.

[@ericthecarguy]

I do too. Thanks for the comment.

[@jimmio3727]

With more steps between the drilling sizes, you can eliminate that problem with large bits. Also, bits are available with tips that match your pilot so it's perfectly aligned.

[@beams098]

this series has been so beautiful I love this so much

[@jim52970]

At our machine shop, at any given day you could walk around and collect well over 50+ sharpie markers! Nice to see a video where the crank is balanced correctly and no cheating by just adjust the flywheel weight. ^5

[@hookahspot8973]

Awesome video, learned a lot in it, Mr. Frische explained a lot of what he did a man with a lot of knowledge, I highly appreciate what you doin Eric you've helped me a lot in college and still helping me, with that being said thank you sir.

[@ycmdill]

The old guy that taught me used a paint scale at the NAPA store. He assembled all the rods pistons rings etc and ground the skirts to match the lightest one. He was running a 283 bored to 301 and 265 heads ported to 327/375 fuel valves. Sounded like a bumble bee.

[@TheSkitd]

I worked at an automotive machine shop in the late 70s, it was done the same way back then. We charged $80 to $85 dollars to balance a v8 unless a lot of metal had to be added to the crank.

[@daver681]

Eric, Very interesting video, I have always wondered the details of how a engine was balanced, I have built a few engines but nothing fancy, Love it

[@marchespants8643]

Awesome video! Always wondered how they're balanced properly :)

[@Harry-kr4jq]

My brother had an LS6 454 balanced and blueprinted years ago. The builder told him not to be afraid of redline anymore. This builder and his brother raced top fuel years ago. They even took a race from Big Daddy in the day.

[@TechnikMeister2]

I always wanted to see how this was done. Thanks.

[@prmayner]

Great vid Eric, I like most mechanics never really got into the machine end of it, that much anyway.

[@dogfood2525]

Wow! I really enjoyed this one Eric. Great job!

[@JordyValentine]

My first job was in a place like this. Making me feel all nostalgic

[@ronmiller682]

Great video. I worked in the machine shop years ago. I miss it alot

[@jasonsimpson4805]

So cool to see this kind of work done properly!

[@trevorbyron8181]

I only hope fritche has groomed the next apprentice with his expertise...pass down his art...immaculate experience cannot go down the drain once he retires..like a heirloom

[@moomin110]

It's terrifying when he starts to use the big drill bit 😨

[@ellieprice3396]

It would have worked much smoother if Kevin had used a piloted counterbore for the holes instead of the big drill.

[@bigbrute4speed]

He helped balance a set of factory race prepped trw small journal chevy rods. They were so all over the place we had to get so old school knowledge an got them with in 2 grams ...

[@markjackson8302]

your best video yet. OUTSTANDING!

[@DoRC]

as long as youre sharpening chisel point bits a bench grinder is definitely the way to go. I watched a few videos and taught myself in an afternoon. Definitely not the hardest skill but it is a skill that takes practice.

[@derekcrymble9085]

500 rpm or 700 rpm is just fine . The force of unbalance does not change . I balance 25.000 rpm turbine rotors for marine diesel applications . A 700 Lb rotor is turned at 700 rpm , for dynamic balancing . Great vid.

[@finscreenname]

My 427 tall block strokers (2) had to use 454 external balance flywheels (drilled in a few places). The harmonic balancers were drilled, crank, flywheel, the whole thing was a balancer's nightmare.

[@moo.johnference869]

This is why smart phone are such a smart purchase, knowledge, knowledge, knowledge.

[@freakyRunner]

Great that the engine builder takes the weight in grams and nothing else. This makes his work much better and more accurate greetings from Germany

[@billybobjoe198]

I think you have a fundamental misunderstanding of English. A system of measurement cannot be more accurate than another. And because of that using one or the other can't make it better or worse.

[@freakyRunner]

Of course, it is easier Not because of the accuracy, which I mean in the case not. But he does not have to convert so strongly and complicatedly between the individual units. There remain the many pay behind the comma And in the metric it all refers to tener that makes everything easier and faster Sorry for my bad english, it is just not my mother tongue greetings from Germany

[@paddan426]

You say that, but yet measurements in US are not accurate enough when u go in high science. Ask NASA... they lost a $125M Mars probe, due to use of a measurement in inches. Maybe it would have been good if it was all in inches, but there is a reason why its not used. Wight-Density and balance is a lot harder to get correct with 1/8s 1/435th oz vs a very exact weight, onto 100s of digits if needed. And it matters, if u need the tolerances. Lexus LFA is a good lesson on what perfect balances engine, with 0.001mm margins does. Its one of the fastest revving engine that exist, and its N/A.. For Erics case, he is gonna add "boost" to compensate for the high-rev, but i love the work he is doing to get a good balanced engine. But as u can hear in the video, they settled for 5000-6500RPM due to the hydralic-lifter and "settle" for the balance they do. Doesnt mean that a solid lifter and better balance wouldnt give more HP, but it would complicate it.

[@billybobjoe198]

Paddan I don't work often with weights, but every digital scale I have uses decimals not fractions. The reason standard measurements aren't used everywhere is because of extreme globalist lobbying. One system of measurement is not more accurate than another. If I convert 1 gram to ounces, I don't get a different answer every time.

[@paddan426]

Oki... tell me then, how many inches, exactly, is a 14nm transistor? You know... in Intels Skylake CPU (a US company). Just as one example on how incredible impractical and rounded off imperial measurements get. The most funny thing is tbh that u partially use metric, say in power, data-sorage and more. Say after me: kilowatt/Terawatt, Megabit, GigaByte. Why? If because imperial cant handle very large or very small things, and lack definitions for a lot of things How about wire-gauge... is it 0 or 000 ?. cus its based on stupid pre-made scales that suddenly was exceed. Or how about a gallon. Is that a UK gallon or a US gallon... u cant even agree on that. But instead of using inches, AWG, AA size, gallon i can use mm as base in all cases: I get nm to km for inches, I get mm^2 for AWG I get litre that is = 1dm^3 witch can be converted to mm if u want. So with a single "measurement" i can logically calculate between things, and instead of using a table sheet like they do in the video to "estimate" how many grams i need to drill, u can count it with a simple volume/density calculation. Now think how this relates to the engine-block, knowing that the volume of the cylinder, the diameter of the piston and the lenth of the shaft can all be done in the same measurement base... makes for simple and damn accurate calculations, and no approximations in the middle of everything. Witch do u think is more accurate? the sheet he used, or a proper calculation? I agree that an exact calculation between the 2 are just as accurate, but its way to complicated to do most of the time with imperial. I say there is a reason why NASA, F1 and other critical places uses metric... cus they cant do it with a table sheet and a handgrider. In Eric's case though.. I'm sure its more then accurate enough, but he still had to go to metric grams to save on the decimals and fractions, instead of being some fraction of 28 from the goal.

[@johnrebello7059]

Great balance job big guy

[@LinusScrubTips]

delrin is great stuff. machining it on a lathe is a blast, because it won't break easily, yet it's still soft, so you can just go at it lol.

[@losi8ightyew]

Yeah just hope you never have to be the one that makes it. I work with it in molten form(injection molding)every night at work. It smells horrible and pulls the oxygen out of the air and if we get it too hot it produces formaldehyde gas(which is why you NEVER want to burn or melt Delrin without breathing protection). It is a very cool material none the less, it has some very unique properties.

[@MechaniclifeJDM]

I would like to see the additional steps which would become necessary when you add a balance shaft to the mix. Machinists are amazing!

[@trezza181]

No we're not, I just stand there all day making shafts and hubs with a lathe and milling machine. Really, pull a few levers, wind a few wheels, it's not very complicated, if you have mechanical aptitude and some basic math and geometry.

[@MechaniclifeJDM]

@@trezza181 So humble, yet the level of precision is almost superhuman, most people couldn’t do what machinists do

[@jasonklow3355]

This has to be the most in-depth explanation of crankshaft balancing on the internet. Thank you so much. One question, it sounded like your machinist suggested that internally balancing a crank is preferable over externally balanced. Please explain. I'm no machinist but i thought including as much of the rotating mass as possible would yield the most accurate results. During the video, I was thinking why not include the clutch and pressure plate? Again thanks for the awesome video.

[@roderickoates4627]

I have heard polishing the connecting rods is a means by which you can avoid the weight of the oil mentioned. However, the splashing of the oil might not happen as predicted at the design stage. As you have seen here, each action has a reaction.

[@TrueBlueEG8]

What a great video, thanks for this Eric

[@highlypolishedturd7947]

You know you're a "greasy fingers" sort when the sound of drilling and machining lulls you to sleep!

[@cypeman8037]

I like how Kevin is allowed to tell us what he's doing, and why he's doing it only for Eric to repeat all the same information. It's one of your traits Eric.We only understand you. 👍😂

[@IliescuBenyamin]

Awesome. Thanks Eric!

[@Morphasella]

i have just watched this on 2021! thanks!!!

[@bchant19]

well worth the wait on this video some awesome insight into a motor machine shop.

[@zachbruner481]

liking the crown safety glasses

[@mephistopeles138]

Thanks for making this vid. Always nice to see a professional taking the time to explain things

[@MegaScott]

When estimating the cost of machine work on a V8, I use the $500 rule. Boring and decking - $500. Balancing $500...lol Nice Video, proper balancing is not Voodoo magic, there's a reason for all those holes in your crankshaft!

[@saqibnawaz5139]

We declare u sir kevin d" Rye Revs" magician,every thing articulates magically with d very basic unit as a Rye

[@kainhall]

got a few 400 GM small blocks....external balance. great info for my tinkering.

[@CrankingOneOut]

"What you do to one end effects the other end" Eric, I don't know if you've ever balanced a huge set a 35s, but this is super similar to tires. And I assume that is similar to most dynamic two plane balancing.

[@bigmac965]

Great education on balancing! Thanks!

[@nairblab4061]

Holy crap, what a great video. Thank you guys

[@cliveramsbotty6077]

Excuse my language but this was fucking interesting

[@tsw199756]

Drill a 1/4" pilot hole. Switch to a 7/8" 4 flute Ball End Mill to get the hole up to 7/8 without all the jumping around of the equipment. Once you are fully engaged below the rad of the crank cheek switch back to a drill bit.

[@billybobjoe198]

Yes. The fact that he made a 1/2" pilot for a 7/8" hole was awful.

[@southjerseysound7340]

I agree that it wasnt the absolute best way to drill something but you cant run a end mill in a drill press because it can cause bad things to happen.We're not talking precision machined holes here,its just removing dead weight.So while you can nitpick all you want at the end of the day he did a good job.

[@tsw199756]

SouthJerseySound I didn't say end mill I said ball end mill...big difference. I've personally done what I said successfully and even ran smaller BEM's in a cordless drill to remove broken bolts. The drill walking around cannot be good for that precision balancer either, not nitpicking just pointing out facts.

[@southjerseysound7340]

Cad-Cam_Man Sorry but a ball end mill is just as the name implies a "end mill" and they are designed to cut horizontally.Whereas drills are just that made to drill vertically.Now just because you've done something without issues doesnt mean that its the right thing to do or the right tool for the job.Using your reasoning is like saying,I've successfully driven 80 MPH and have even gone faster and never had a problem ;) The fact is that end mills regardless if they're flat,ball or even a torus end mill are designed to be used in mills and not drill presses. Now I agree the bit was walking.But a end mill that cuts along the flutes would have made things worse and wallowed out the holes and put more of a side load on the drill press .The best thing to do would have been to use a center drill and go from there.

[@tsw199756]

SouthJerseySound You have in essence 2 bisecting cylinders. A 2 flute drill bit cannot easily start a large dia. hole due to the curvature of the horizontal cylinder. A 4 flute Ball End Mill is designed to plunge and side mill. I agree that the end mill will wallow out the hole worse than the drill bit that is why I said to use it just to get below the top curvature of the crank cheek. Drill presses are not ideal for this type of work but it can be done successfully with a bit of finesse and without the harsh back and forth movement I saw in this video. Listen I've been a precision machinist since the mid 70's and owned my own shop for the past 18 yrs. I won't do anything that will stress my equipment because I paid for it. I think the crank balancer was unduly stressed by his methods. If your worried about using a ball end mill then use a 4 flute core drill.

[@gyrojomo]

Perfect voices for this type of video

[@dexcoon]

This guy is great. He (much like you) seems to love teaching.

[@TheNachoDaddy]

Is it just me, or did John Favreau open a machine shop? I enjoyed this video immensely BTW.

[@mickymcfarts5792]

Perfection is a cruel mistress

[@punishr36]

Those bob weights. Is there a specific position they are in when clamped relative to each other since they don't themselves look very balanced, for example did you indicate them relevant to something to ensure they were square when at top dead center?

[@sctrep]

I really enjoy these videos. Thanks so much

[@salvadorebertolone]

just get a darex if you need to sharpen bits. its expensive but if you are using large or high performance drill bits, cobalt drills, it pays for itself quickly. you can even get diamond wheels for doing carbide on them.