Belt grinder radius jig

[@Jer_Schmidt]

UPDATE: I do not recommend building this. I have stopped using mine. It works ok for parts like those shown in the video, but parts with larger radiuses chatter because they're not properly supported. I've had a few scary incidents that have led me to believe this attachment is not safe, including one incident where a chattering workpiece climbed its way off of the pin (yeah, I don't understand how that happens either). When using it in horizontal mode, there's a risk of the part spinning and cutting your hand or pulling your hand into the belt. Since the attachment can't be adjusted left/right or up/down, it also quickly wears out of the center of the belt. To get the same functionality without the downsides, try simply using a block of wood with a hole that matches the hole in the workpiece, and pivot the workpiece around a simple cylindrical pin stuck into the block (you can just use the drill bit that you drilled the hole with, although there is some risk of breakage). Put the hole as far back from the edge of the block as your desired radius will allow, so the workpiece is fully supported. Then simply clamp the block to your fixed table, and advance it toward the belt by tapping it with a mallet. It's not as flashy and cool as the jig in this video, but it works better. I'm hoping to release plans for an improved version of the radius jig in the future. It will likely be part of the surface grinding attachment, which I hope to unveil by the end of 2024.

[@Wintergatan]

The ball, spring and set screw assembly was so satisfying to watch!!!

[@ConstanceCornelia]

This is by far one of the better creator channels youtube have to offer.

[@jadinzack9271]

ConstanceCornelia agreed. These videos have high production value and are underrated

[@paulmoss5455]

Definitely the next jimmy diresta 👍🏼 Such good content, it always makes me smile 😁

[@ForwardGuidance]

Just needs some cats, chickens and dogs to include.

[@chrisis9030]

+ Paul Moss How does this stuff have anything specific to do with DiResta??? I see Jeremy as an engineer, whereas Jimmy is an artist. To each their own, I'd say?

[@samrodian919]

This young man is a very good "Practical Engineer" and his designs very well thought out before he cuts the first piece of steel. But like every one else, mistakes are made, or you think of something better! Good luck young man.

[@3347861]

When you get chatter on a lathe, try playing with feeds and speeds.... It's a funny thing. Slowing down is instinctive, but sometimes you'll find that speeding up the lathe will straighten things out. Harmonics are in play, and if you can change one of the variables to eliminate resonant harmonic frequencies things will smooth out.

[@davidwillard7334]

No wonder your idea Chatters ! So Much ! Hey !

[@mikehunt8968]

Or you can support the end of the work so that it doesn't move in such a small lathe? 🙄

[@dangkolache]

7:32 that click sound is so unbelievably satisfying

[@Licknukas]

Seeing you upload always brightens my day up ^_^

[@Jer_Schmidt]

+Nick Lukas Thank you! Seeing this comment brightened mine :)

[@mhpjii]

Jeremy, we all are in awe of your God-given talents and creativity. It is such a pleasure to watch your videos. Thank you! All the best.

[@yuvalhuck5437]

Will the plans be available any time soon?

[@davemccracken6436]

Jeremy, I watched your wood vids a while back, and never followed you into this stage. I have been so impressed with your range of knowledge (wood, welding, and elbow grease mixed with thinking powder)! I love wood, different species and wood patterns, but you have shown me a beauty to steel I had not appreciated! Sanding increases beauty, even with steel! I too would like to know more of your story, as it must be fascinating. I imagine you are a "simple" ol' farm boy with just too much time on his hands! And a Dad with a workshop full of tools. God sure created another unique video maker to push ol' Matthias Wandel to different ideas. If you start to work with, or play with, marbles, I will have to assume that you have lost yours!

[@Jer_Schmidt]

Thanks Dave!

[@victorcastle1840]

@@Jer_Schmidt, By all means we would enjoy hearing your back ground story. Rather than just assume you grew up watching your father work in his shop and learned to operate the equipment . Along with your own creative and intelligent mind, able to work out the problem with your own ingenuity .

[@michaelelbert5798]

Jeremy you do a great job man with the whole shell and I used to work in a machine shop for a while I loved having access to all the tools I needed to make, anything pretty much , out of metal . And I have been known to build my own tools. And probably much like yourself my creations are only limited to the tools and equipment and materials that I have access to. And when it comes to life hacks I have done thousands of them but I still fine interesting stuff on the internet about that. And I have to say you're a natural-born teacher for one thing.

[@subzero5101]

I never comment on these seriously. Dude you are my F ing hero. I learn so many excellent tricks. I just had to say thank you. I built your revised table arm and they can't believe it's not from a factory until I show them your videos. They all say the same thing. "A bigger need than you?". Then they subscribe.

[@DireWolfForge]

Amazing craftsmanship, Jer. I really like your designs. Very well thought out and clever. I would be interested in buying plans or perhaps a finished one you’ve made if that were possible.

[@davidwillard7334]

Send ONE! Million Dollars ! To buy the Plans !

[@franciscorferras1738]

A pesar de la juventud de este muchacho, es un verdadero artista y tiene un gran coeficiente intelectual. Muchas bendiciones.

[@forddiesel4life]

This is one of the coolest attachments if seen for a 2x72 belt grinder. I'm going to have to use this, well done.

[@timschultz7755]

The chatter on the outside is likely the hardening from the rust. You have to take a deeper cut through the "skin" of the rust to get to the softer metal.

[@prophez23]

You truly are a genius. I really enjoy watching you create all kinds of very useful tools. You're going to go far in your craft. Keep up the good work. And thanks for sharing your work with us.

[@wint3rsmith42]

Its taking me a while to get through everything I want to see on You Tube, so I only just got to this addition to your grinder. I already made a simple rad jig for my grinder but yours is so much better, I think I'll be starting again. Thanks for sharing.

[@Badgermatt-nc5nr]

Awesome! Best belt sander I have ever seen!!

[@LordOfTamarac]

Good good... let the metalworking flow through you

[@GalacticRod]

the parts where you hit the hole, then cut to drilling it is fantastic. excellent editing!

[@InMused]

Jeremy, this is very clever engineering. Well done.

[@havenisse2009]

You are one of the coolest nerds I follow on youtube. Nerd in a positive way. So full of knowledge, creativity and at the same time excellent video skills.

[@davedunn4285]

A very nice addition to your work

[@noyouwillnot1169]

That spring-loaded ball-bearing retention system was amazing. Seriously, this channel deserves to be huge. Keep up the ingenuity, man! :)

[@AKendall808]

You continue to impress. Well done.

[@Simon28298]

with a v-block you can put the drill sank you use to drill or ream and than do your radius, don't have to machine a pine every time. Really like your channel

[@Jer_Schmidt]

+Simon Bouchard Good idea! I imagine I'd want a clamp to hold the bit against the V-block, but I think that'd work great!

[@Simon28298]

On your horizontal set-up the clamp won't be in the way. I was thinking about a radius gage system too and your pivot mecanism with the handle really did 1+1 in my head.

[@allymariachi9230]

wow,i feel that grinder,its the best yet,so swift as if it is not moving at all,i'd pay loads of money for it,also wondefull idea with the jig

[@cloudyeight]

Dude, you make fantastic videos by including all the small details other channels leave out.

[@rdspeedfab]

Love the way your brain works, man. Thanks for posting!

[@seyed1231]

Thanks for very well round making tool design

[@markramsell454]

Lathe rigidity can be enhanced by using the tail with a center. Then play with the feeds and speeds as noted in another comment.

[@atcaleb]

Only thing I have to offer is with a small welder on that large bar you welded I have used a torch to preheat stuff like that in the past and it was always worth the time. The hotter you get that big bar before welding the better. From experience. Awesome build dude!

[@Jer_Schmidt]

+Caleb Welte Yeah, I would have done that if it needed it for strength, but I don't see that it needed it here. Thanks!

[@Bikeeast]

I'm really enjoying this series of builds, Thanks.

[@crujones6308]

Awesome job ! Bought the plans. Thanks again !

[@ozcanonal]

Excellent work every each time...

[@rjung_ch]

Thanks Jer! 👍💪✌️

[@SergioPena20]

Have you ever heard of a spring-loaded tap guide? You chuck them up in your drill press or mill and bring it down against the little dimple on the back end of a tap. They help you make sure your tap is starting straight. Amazon has one from Brown & Sharpe for $20.

[@Jer_Schmidt]

I hadn’t seen that before. Cool. Thanks for the suggestion

[@billybobjoe198]

Not sure how much use it would be, but you could make an insert for fitting odd size (metric) holes that would be useful for more than one size. If you put threads on the pin, and made a tapered cone shaped nut it would self center over a range of sizes, the size of that range would of course be dependent on the pins thread size, and the width of the cone nut before it contacted the belt. Clearly less than ideal, but if you ever had to make even 2 inserts that only got one use, it would "pay for its self".

[@simonstucki]

very nice! now you can build the sander again with all perfect radii :)

[@bobbg9041]

I think this Kid worked on a farm, where if somthing breaks you can't run to buy a new one, so you make it to get the job done. But he's gotten real good at it. Now while the corns growing he could make some really good money making tool's for others that do not have the time or equipment to do so. This belt sander would be good in either woodworking or metal work, and its a lot better then whats on sale at harbor freight. Speaking of and I asked the CEO of Harbor freight this, He would sell Made in America if somone offered up products at a good price, if you make stuff and want to sell a lot of it take it to them and work out a price and see if they opt to buy it Made in the USA. If they say no, no big deal. Look we either buy made in china and bitch about it, or buy made in the USA and pay a little more for it, however some things cost a hell of a lot more. But they are built like tanks and made to last.

[@EazArtWorks]

hell yes!! your new spot looks great too!!! 👍👍👍

[@ralphcallender1138]

When will you make a PDF plan for this attachment? I would really like to see it as soon as possible. Thank you kindly for the GREAT job you have done so far!!!

[@Jer_Schmidt]

I don’t plan to ever make a pdf for this one. It’s a bad design; trying to come up with a better one.

[@stuartholden5816]

When you saw something try to make sure your blade guides are as close as you can get them and still clear. When you cut the base plate you only needed about 4-5 inches to clear your part but the guides were 12-14 inches apart. Having them set closer will help you saw much straighter lines. Also the chatter on the OD of the base plate may have simply been a hard scale on the outside. A lot of steel will have a hard skin and the oxidation can also surface harden to a small degree. Overall though a very informative and concise video keep up the excellent works.

[@MaxMakerChannel]

That is a really good idea! I round over stuff on my disk grinder all the time and it is more difficult than it looks. Especially not getting caught or have the workpiece lift.

[@paulvanzweel8287]

Nice job you did. Well thought out project. A small angle grinder with thin cutting disc instead of hacksaw will simplify your fabrication. First prize would be a metal bandsaw or woodsaw reduction box conversion....love your channel

[@Jer_Schmidt]

+Paul van Zweel Oh well, I need my exercise anyway... :) I have this nagging idea to build a vertical metal-cutting bandsaw. Like a real proper one, maybe 20" throat or so.

[@ecaff9515]

Amazing video. Your thought process for analyzing and producing the solution is very interesting. Jeremy, you are a great inspiration for creative problem solving. Watching your videos, help me solve some of my solutions for my, "make it happen Captain", situations. Thank you for sharing. You deserve our support.

[@mkall]

dude, your videos are always amazing. they are not too fast, not too boring and with enough information to understand what are you doing without getting lost in said information.

[@ramonaschultheiss3870]

Beautiful work.

[@TheLindsay720]

You are out of control. So good.

[@TMatt007]

I got all the pats of the radius jig completed today, a few welds and cutting the table down and it's ready to use. I came to the conclusion today that my next belt grinder will be much better now that I will have use of a belt grinder.I used your sketch up drawing to duplicate the parts and verify dimensions. The biggest mistake I made was boring the hole in the table, which is the same as the pin. I guessed at 10 degrees and it seems like it should be closer to 15 degrees. That changes where the ball bearings catch and the depth of the part and also the diameter at the face of the table. Challenging build, but appreciated the challenge.

[@iritantNL]

i wish i had a workshop like that

[@rayfalcone6897]

real clever Jeremy,,,nice to see a young man doing a nice job, with the project.and it shows in the video.

[@dznm10]

You got lots of nice ideas out there! I'm glad I found your channel.Keep the video coming bro....

[@smacurface]

Very clever. Neat construction.

[@joemcgarry1106]

In addition the playing with the speeds and feeds, reduce the radius on the bit. That may help with the chatter. The lathe is small for that size work piece.

[@rumengergushki7260]

Another great video from you. I have your belt grinder plans and I think it is time to build one for my workshop :).

[@joell439]

Awesome!!!! Thank you for sharing your clever solution. So much better than the complication of a rotary table on a milling machine for something that can be +/- .015

[@jaguarking11]

that is a very very nice belt sander you have there. awesome build. also for the lathe chatter. sometimes increasing cut pressure gets rid of it.

[@Jer_Schmidt]

+Bruno Martini Thank you! By "cut pressure" are you referring to depth of cut + feed rate? Sorry I don't really know all the terminology...

[@jaguarking11]

Cut depth is what I'm referring to.

[@Jer_Schmidt]

+Bruno Martini Ok, I'll keep that in mind next time I have this issue. Thanks!

[@davidwillard7334]

What B.S ! IS THAT !!??

[@GoGreenMan]

I really like the set punch-drilling cuts

[@aroldfut]

Amazing problem solving skills.

[@tadeuguilherme67]

Good Morning ! Your project is magnificent, and finished in every way! congratulations! I live in Brazil and there is no speed regulator like this one. very good indeed your project. Guilherme

[@syked]

Awesome work! love your editing style and the quality of your designs.

[@Ammani-Yat]

it's super nice 👍 well done jeremy

[@donfinch862]

yer a good thinker/visualist. good job

[@frankgel]

The quality of your videos is turning exponentialy good. You're the real MVP for keeping up the inspiration! Thank you!

[@moeman3145]

Love your videos man

[@millsbrian55]

Great video! You're one of my "must watch" channels.

[@pirreli5]

discipline and lack of lazy, a true maker!...well done:)

[@harplingesven0100]

You are such a true inspiration source. I thank you so much!!!

[@4BoltClevo]

that's it I'm building this belt sander. That jig is just way too cool for me to not have one

[@canuckloyalist4681]

You've got some real talent and skill there lad!

[@gilgrace1915]

Years ago I used a hand held strip sander with a 1" wide belt to polish crankshaft journals to a super fine finish. Something like it would remove those pesky chatter marks. Sand while the piece is turning in the lathe. A 100 grit belt should leave a nice finish. Another project? :-) This project turned out very well, so maybe this idea is not needed. Keep these videos coming...fascinating.

[@unploog]

Because you slowed down the footage at 11:02 I thought your tap would've snapped. Also I love the center punch transitions!

[@OneManBandWoodworks]

That is awesome and I don't know if it's already been said but if you make a little vice like jig with the same indexing pin attached to it you can radius stuff that doesn't have a hole in it too.

[@Jer_Schmidt]

+One Man Band Woodworks I've been contemplating how to execute the creation of such a device. I might make one yet.

[@mathiasrapp8904]

good job done, super nice jig

[@armdaMan]

Brilliant ideas and superb workmanship for a Young man, Jeremy. And with just basic Tooling. Absolutely clever design. ATB aRM

[@frankbusuttil2572]

Nice Jeremy. And by nice, I mean wow. Can you please tell us a little about your background? What is your training? Where is the shop that you make these vids? What do you do when you aren't making you tube videos. I'm an old guy who laments the passing of the "made by hand" days but your videos are an inspiration to everyone who sees them. Keep it up man. Great stuff.

[@Jer_Schmidt]

+Frank B Thank you! I don't really have any formal education, but I grew up in a farm shop, which is a pretty good learning environment! I work in three different buildings, my woodshop is the only one that's actually 'mine', that's where most of my videos come from. My lathe is in my dad's old farm shop, which is mostly storage now, and this video + the previous one were mostly in my dad's new farm shop. That's where most of the metalworking tools that I have access to are. I'm currently unemployed, trying to find someone who'll hire me. Until then I get to call myself a "full-time KZbinr" :)

[@frankbusuttil2572]

Thanks for the super quick response J. It's just before noon here in Sydney, Australia and I'm not going to do the conversion for where you are. Keep it up, as I said your work is an inspiration to all who see it. I'm a woodworker myself but your touch makes me want a milling machine. Hope you find a job soon that doesn't stop you from making movies. I'm sure there's a balance point out there somewhere. Thanks again. F

[@specialk22tt]

You're a pretty smart dude, Mr. Schmidt.

[@Jeroen_93]

You are a genius, love the solutions you work out

[@grandematapalo]

Use a negatie rake tool but with a sharp edge to cut down on vibration short of that something is loose or operating at its limits.

[@Jer_Schmidt]

+grandematapalo Thanks for the info.

[@hrxy1]

very inovative , good job well done ty

[@willkern6]

I love this project. Well thought out, well executed. I am sure I am not the only one who would pay for the CAD files. Any plans on making the design available for sale/download?

[@Jer_Schmidt]

+WCKern I plan to make at least the Sketchup model available, probably even a PDF plan. Not sure yet.

[@joell439]

Jeremy Schmidt I would pay for plans. Joel

[@ibrich42222]

I like your design and of course, would pay for plans that would save me a ton of time.

[@berhanegebriel3155]

WCKern I learn more by watching this than All main News media, print, audio or video.

[@19441978]

Impressed Jeremy, you are extremely talented to be so young. What is also interesting is the quality of work you produce with no more equipment than you have (i.e. milling machine). I would be another vote for the PDF plans on this accessory to the belt grinder. Thanks

[@GoGreenMan]

I would LOVE LOVE LOVE to have that grinder and jig set up! SOO very awesome!

[@arklanuthoslin]

i love your grinder... it amazes me that the weight of the motor doesn't cause vibration issues with it mounted free floating like that, so far from the actual hinges. speaks to the rigidity of the rest of the frame i suppose. i'm very much going to make one like it eventually. this jig too.

[@TheKinchaos]

you are a genius. wow.

[@cognitor900]

There's no end to Jer's skill sets AND smarts...and way funny too!

[@91donwilson]

So good

[@jvmiller1995]

Very cool build. Why do you not put a VFD on that old lathe? never have to change belts again.

[@12345NoNamesLeft]

Is there a PDF for the radius jig - we don't all have your Sketchup skills

[@Jer_Schmidt]

This radius jig is a bad design in many ways. Decided not to make a PDF for it but rather just make a new one that’s better. In the meantime here’s a video that shows you how to view SketchUp models: kzbin.info/www/bejne/ppzHnISAd7GGjZY you don’t need much experience to be able to view them.

[@GM-dc8vr]

Man you've really stepped up your content the last 2-3 months. Loving it. Thanks a lot man.

[@JeffJeffTM]

it might help to bevel the edge of the stop that you're welding, where it meets the other material, so the weld can get better penetration.

[@guillaumeemualliug8220]

So I've been through all the comments you answered and I didn't see my thoughts so here you go : instead of using the spring-balls system and the complex shaped dower pin, and instead of machining the huge shoulder on the 5 inches bar for hours, why didn't you just keep the table full, drill a hole in it, put a regular dowel pin and then mount cylinders of different external diameter, but always the same internal diameter (the one of the dowel pin)? That way, when you sand a different piece, you just have to change the cylinder and keep the rest in place. It's much simpler to build and to use in my opinion, but I may be missing an important point here. And this have been already largely said, but I kinda looooooove your work and your videos. Almost everything handmade, well-concieved, plus the videos are funny and instructive and the editing is very clear while keeping things dynamic. So: bravo, and thank you.

[@Jer_Schmidt]

+Guillaume Emualliug That system would work quite well in many regards, but it has one drawback that makes it less practical than it might seem at first glance. With my pin system, I can make pins of any size from tiny (think 0.030") to quite large (anything over 1.5" would be impractical). With the dowel + bushing system, there is no way to have that range unless you make the pin interchangeable in addition to having bushings. You wouldn't want to rely on a 1/16" pin to hold a 3/4" OD bushing, so you'd have to swap in at least a 1/4" pin for that. That said, I can make bushings to use with my existing pins; maybe make pins for the most common sizes and bushings for everything in between. Thank you!

[@jamespilch7011]

Guillaume Emualliug k

[@RenegadeAgent91]

Man you are awesome, keep going bro!! congrats from Argentina !!!

[@TalRohan]

cool build ..... thanks for sharing

[@Garageworkshop]

Very nice radius jig, really like the design and how easy it is to setup. When you were reducing the weight of that disk on the lathe, wouldn't it be faster to take the cuts of the diameter instead of a series of facing cuts? Keep up the great work!

[@Jer_Schmidt]

+Garage workshop Thanks! I couldn't get it to stop chattering on turning cuts, but facing cuts worked beautifully.

[@gunsmither]

Very nice Jeremy, thanks for sharing this!

[@scottmccarroll2618]

You have to be one of the smartest and capable young guys I've ever seen I really love your grinder and would love to build your grinder for myself

[@effyeadude]

did you get a new shop? if so, you definitely deserve it

[@kenl5217]

so awesome. thanks for the inspiration

[@toolify]

This is awesome in so many ways!

[@williemakit8548]

Nice work Jeremy. Now that the attachment is built and finished it should be a great time saver when you need to use it.

[@johnbouttell5827]

11:44 love the weird sound

[@Jer_Schmidt]

+John Bicycle Me too, in some odd way...

[@Jer_Schmidt]

+John Bicycle Me too, in some odd way...