1981 Powerex Bench Grinder Restoration
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- čas přidán 15. 10. 2021
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/ @ajrestoration I got this grinder on Facebook Marketplace for next to nothing. Brought back to life looking as good as new (if not better)
I hope you enjoy the video.
If you have any suggestions for improvement, or compliments share them below!
Please leave a like if you did like the video, please subscribe and feel free to comment your thoughts and as always thank you for watching.
Link for becoming a channel member. (less than 2 dollars)
/ @ajrestoration
More info on grinders and grinders in general.
A grinding machine, often shortened to grinder, is one of the power tools or machine tools used for grinding, it is a type of machining using an abrasive wheel as the cutting tool. Each grain of abrasive on the wheel's surface cuts a small chip from the workpiece via shear deformation.
Grinding is used to finish workpieces that must show high surface quality (e.g., low surface roughness) and high accuracy of shape and dimension. As the accuracy in dimensions in grinding is of the order of 0.000025 mm, in most applications, it tends to be a finishing operation and removes comparatively little metal, about 0.25 to 0.50 mm depth. However, there are some roughing applications in which grinding removes high volumes of metal quite rapidly. Thus, grinding is a diverse field.
These machines include the:
*Belt grinder, which is usually used as a machining method to process metals and other materials, with the aid of coated abrasives. Analogous to a belt sander (which itself is often used for wood but sometimes metal). Belt grinding is a versatile process suitable for all kinds of applications, including finishing, deburring, and stock removal.
Bench grinder, which usually has two wheels of different grain sizes for roughing and finishing operations and is secured to a workbench or floor stand. Its uses include shaping tool bits or various tools that need to be made or repaired. Bench grinders are manually operated.
*Cylindrical grinder, which includes both the types that use centers and the centerless types. A cylindrical grinder may have multiple grinding wheels. The workpiece is rotated and fed past the wheel(s) to form a cylinder. It is used to make precision rods, tubes, bearing races, bushings, and many other parts.
*Surface grinder, which has a head that is lowered to a workpiece, which is moved back and forth under the grinding wheel on a table that typically has a controllable permanent magnet (magnetic chuck) for use with magnetic stock (especially ferrous stock) but can have a vacuum chuck or other fixture means. The most common surface grinders have a grinding wheel rotating on a horizontal axis cutting around the circumference of the grinding wheel. Rotary surface grinders, commonly known as "Blanchard" style grinders, have a grinding head that rotates the grinding wheel on a vertical axis cutting on the end face of the grinding wheel, while a table rotates the workpiece in the opposite direction underneath. This type of machine removes large amounts of material and grinds flat surfaces with noted spiral grind marks. It can also be used to make and sharpen metal stamping die sets, flat shear blades, fixture bases or any flat and parallel surfaces. Surface grinders can be manually operated or have CNC controls.
*Tool and cutter grinder, which usually can perform the minor function of the drill bit grinder, or other specialist toolroom grinding operations.
Jig grinder, which as the name implies, has a variety of uses when finishing jigs, dies, and fixtures. Its primary function is in the realm of grinding holes for drill bushings and grinding pins. It can also be used for complex surface grinding to finish work started on a mill.
*Gear grinder, which is usually employed as the final machining process when manufacturing a high-precision gear. The primary function of these machines is to remove the remaining few thousandths of an inch of material left by other manufacturing methods (such as gashing or hobbing).
*Centre grinder, which is usually employed as a machining process when manufacturing all kinds of high-precision shafts. The primary function of these machines is to grind the centers of a shaft very precisely. Accurate round center holes on both sides ensure a position with high repeat accuracy on the live centers.
*Die grinder, which is a high-speed hand-held rotary tool with a small diameter grinding bit. They are typically air-driven (using compressed air), but can be driven with a small electric motor directly or via a flexible shaft.
*Angle grinder, another handheld power tool, often used in fabrication and construction work.
Good lord thank you for replacing the garbo wiring. I've soon sooooo many restos where it's just pull it apart, clean, paint, put together and the fire waiting to happen on the inside never addressed. So thank you, my hats off to you. Subbed and liked.
Welcome to the family Troy! Yes, I am no professional when it comes to wiring, but when I do wiring, I try my best.
@@AJRestoration Definitely good job! The plug with its tarnished pins is a slight letdown, otherwise it looks perfectly fine!
Some of those so-called restorers actually remove a three-core flex and replace it with two-core, completely ignoring the earth. Probably doesn't matter because their house wiring isn't earthed either but still looks bad.
18:10 the green wire (grounding) is necessary to be in contact with the metal, the paint must be removed from that contact point, the same is with the screws that join the motor with the base✅
Greeting from Argentina.
Thank you for the comment! The powdercoating is conductive. The earth connection is connected to bare metal.
@@AJRestoration Watch the video from the beginning yourself, you put the ground wire to the wrong place, and that cable should have that "stress relief" where you screw the ground. If someone yanks the cable hard, it might let go from the connections, and ground wire should always be longer than the hot and neutral, so it comes off last.
3:43 you can clearly see how it's supposed to be.
My dad should restore his old Chicago Electric grinder he bought back in the late 80s/early 90s. That thing has seen so much work since it was bought new. It had to have been around the time I was born when he purchased that grinder. It's showing some age, but it could be brought back to life. It is basically the same construction as the one you restored. So simple in nature.
Love the way you changed the color on your project. It looks a bit more modern. The gunmetal hammered look is top notch. Great job!
Thank you! I love to keep the dents and little defects when I restore something. It keeps the age and the story of its life.
D wd ď sď sd w sď w w
I have this exact grinder! Mine needed new bearings recently but besides that and a bit of surface rust it's still going strong.
From one Adendorff customer to another, Well done.
Hahaha sometimes Adendorff tools aint that bad ;-)
I have one like that in the shop that’s used weekly. Always wondered about what year it was made. Came on a pallet in a wood box with 500 lbs of assorted tooling I bought in 93 or 94 for $75.
Nice restoration. I especially like the casting imperfections and how you left them visible -- no body filler to become problematic later. Thanks!
I actually really liked how the body imperfections looks with the powder coating. I think it really added to the aesthetics of the grinder.
problematic later?
@@smashyrashy I think with use, vibration and general knocking about, the filler would perhaps crack and fail.
@@rirkc maybe but it would provide better protection than no filler at all do you think?
@@smashyrashy I think with AJ Restoration's excellent cleaning, prep and paint work, there's very little chance of that. Just my two cents.
I like that he checks that the parts are grounded before powder coating....
Awesome‼︎ It was touching to see the old machine revived beautifully.
One of these days, you need to show us outside your shop, as all those bird and animal sounds in South Africa are intriquing.
I will do that! Some of them like to hide. When I spot them I'll show them off to you guys!
@@AJRestoration - Thanks!
I really love that gunmetal color. Perfect restore!
That finish on the silver area is classy.
That’s the same type that I have, I inherited it from my dad, still works great. Aside from the fact it didn’t spin up when you flipped the switch, it’s in better shape than mine at the start 😆
Nice job. The one thing I would’ve done differently is I would’ve secured the capacitor better so that it couldn’t move.
It wont move.
Im currently "restoring" one with paint thinner, Scotchbright and Rustoleum Hammered, in silver. 😂
You go above and beyond. I love that. 👍
The label on mine says ValueCraft. It's 115 volts, 4 amps, 3450 rpm. It says 1/2 hp. It does have a starting capacitor made by Ming Fun Electrics Ltd, its 75 MFD 125v
I just looked it up, and Ming Fun began in 1980, so that helps date my grinder. Cirtually identical except for the base. Mine has two motor to base mounting bolts instead of 4, and has a rocker switch, not a push me pull you.
Just making mine pretty again.
You heped me date my grinder. 👍
I paid $30 for it and just spent $10 for paint and need a new switch.
...at this rate, im gonna go broke fast.
It purrs like a kitten.
Great job 👍 love the powder coating color.
That thing cleaned up well. Great job. Cheers!
This is the first time I've seen this done to a bench grinder. The blue one you use to buff and wire wheel clean up the small parts of the restoration of your projects you seem to have restored yourself if so thumb s up to you young man 😎👍
I did restore that one also, thank you!
@@AJRestoration cool looking machine there Young Man 😎 Glad you did it
@@AJRestoration but how did you restore blue one without any bench grinder? Respect!
Pure hard work and sheer dedication haha
I just love the sandblaster smiley ;)
much better looking than what it was
I have a 1980s Taiwan made grinder that had a push pull switch. The push pull was broken up from a move I put a toggle switch on mine and repainted it gray from blue still runs great and has twice the power of the new grinders.
mine broke aswell can help me out any parts # or anything
Definitely an improvement!
Great job, I was a little put out when you used so much black, but it turned out good 👍🏼
I Really Like Your Work And The Way Your Filming Things From A Great Perspective.. ✊🏾
Thank you so much 🤗
Честно говоря, раньше провод был закреплен лучше. Конденсатор тоже необходимо крепить, иначе он от вибрации повредится.
I have the same one it's still works perfectly and it's the most smoothest quietest bench grinder, better than the ones we get today
Love the powder coating!
The paper discs are important to leave on. It provides a bit of crush for the washers to even everthing when you tighten the nut.
Yes, they are known as "blotters" and are critical for grinding wheel safety. Blotters are required per ANSI B7.1. The Nuts are also over tightened which can cause the wheel to crack and fly apart. Nut should be just tight enough to keep the wheel from slipping during use.
Nice work 👌
Wow, great restoration!
great film work beautifully thought out
Perfekt,du hast wie immer gut gemacht.👏👏👏💯
Great job but you need to put cardboard rings between the grinding wheel and flanges.
Thanks for the tip! Another guy mentioned it also, I will definitely use that trick when changing the stones.
OLD LEATHER SMITH here. Thanks! It will help me with 1 am in the process of fixing 4 my own use. GOD'S BLESSINGS ✝️⚾🙃
what a nice project. well done!
Thank you very much!
Round pin plug... .is that a throwback to the old colonial days? 😉
Grande trabalho, muito bom. Produto de qualidade. Esperava que mantivesse a cor original do corpo do motor ,ou seja laranja. Mas o preto ficou bom . Parabéns excelente trabalho.
excelente video!! quedo hermoso el trabajo. Saludos desde argentina!
I love it !!! Thanks for Share....
It hurt my soul a little when I didn't see you put the strain relief back in for the power cord even though logically a bench grinder shouldn't need it.
Well done as always, AJ!
I appreciate that!
Hello AJ beautiful restoration good job well done
Thank you Vince!
Looks awesome
Very relaxing video
Valeu AJ! Ficou top
Another top class restoration my man! Looks so clean! 😎😎😎
Much appreciated
Great Work!! 👍
nice restoration 👍👍👍
Большое спасибо, это хороший ремонт. Печально, что мощность электродвигателя всего 150 ватт. Но свёрла затачивать подойдёт. И наждачные круги лучше поставить алмазные. С уважением.
Написано: 0,25 кВт (250 Вт). 150 - номер модели.
Модель P150 что намекает на диаметр круга в 150 мм, Мощность 0.25 kW = 250 Ватт, хватит не только на сверла.
Nicely done as always. Looks great! 😃👌🏼
Thank you David!
Nice work. I have seen a few of these now and every time it inspires me to restore mine. Love the colour choice also 👍
The color came out really good.
I think I have this exact grinder in our workshop haha. Found this from your other channel. Nice to see some more SA talent out on YT. Keep it up!
Welcome haha, I try my best to be a good SA youtuber hahaha
Good job bro
Good Job, nice blue car🤗👍👍👍
Thank you 🤗
Ottimo lavoro, complimenti 👍👍👍
It looks great and you did a wonderful job restoring it as well
Enjoyed the video and I gave it a Thumbs Up
Thank you very much!
@@AJRestoration You are very welcome!!
A great result. You take a wreck & convert it into a 'working work of art'! Thank you for sharing.
Excellent work,well done , I really like how you grow up !!!
Thank you so much 😀
@@AJRestoration Keep it up and you'll be great soon !!!
Thank you John! I really appreciate it!
I really enjoy looking at the guts of these little motors....when they are all apart I have no idea how that coil of copper wires makes it go....all those rather simple parts....magic or witchcraft ha!
Its magic hahaha Thank you for the great comment, I appreciate it!
Fantastic job.
Thanks for the visit
Gut
I have an identical one with a different name, I think it has a mechanical piece involved somewhere inside as it click and throws out when stopping. It is plated as a Black and Decker industrial , from 1950's BRS district workshop in Canterbury. The disc need a cardboard disc on them for safety fitting.
That would be a centrifugal switch, the newer motors use a capacitor. My blue grinder also has a centrifugal switch.
Good job bro 👍
Ottimo restauro e complimenti
ficou novo e funcional amei
Very nice job well done.
Thank you very much!
Потрясающе 👍
Excellent!
Very good friend. Greetings from Brazil.
Thank you! Cheers!
good video
اروع عمل . شكراً
Another very satisfying video to watch Thank you. I was also admiring the little Blue car haha. Or was that for size comparison? Finally 24:28 was brilliant Slo mo sparks and stuff, love it haha. As always * I tip my hat to you Sir
Glad you enjoyed it my friend! I love the sparks haha. the car is more like a little mascot. you can use it for size comparison.
Excellent job, the powder coating looks amazing. Amazing what time and know how can do to an old tool. Keep up the good work, most of this stuff deserves a second life.can’t wait for the next one!!!
I agree everything deserves a second chance in life, its just sad that very few people would attempt it. It's really fun.
Hold on a sec! Is that little hotwheels car wants to be restored with grinder?
ausgezeichnete Arbeit
really nice restoration buddy
Right on
Bom trabalho !
24:40 You're wrong, it doesn't look new, it's new, because you did a full service on it, including painting👍
Thank you so much!
I have this exact one in my shed
Welcome to the club haha
Nice
Good morning from Southeast South Dakota. Down to 34 degrees this am here
13 degrees here in Southern Ontario at the moment
Good day there! A toasty 91,4°F here today.
That's cannibalism, using 1 bench grinder to polish parts for another
Totally haha
You really need those paper discs ( blotters) to cushion vibration and wobble at the grinding wheels, otherwise they may explode, ask me how I know this
Very well done. Super job!👍☘️
Reeaaaally extended warranty on that original 1 year guarantee!
Haha waaaay extended!
Muy bueno....!!! 🤜🏻🤛🏻🇦🇷🙋🏻♂️
Excellent job! Muy Bein.
Thank you so much haha.
that pos is cleaner than me.
👏👏👏👏👏👍👍👍👍👍👍saludos desde Uruguay
j’ai son grand frère le p200 de 1982 !!!!! fabriqué à taiwan
I did the same thing once (holding a nut with pliers to polish it on a wire wheel on the bench grinder) does a great job on bolts too but extremely dangerous! The nut slipped out and flew like a bullet either beaide me or overhead, leaving a deep indent on a stainless steel tank which was behind me lol. but yeah i don't reccomend doing this
Thankfully the nuts shoot forward if it slips. I always use face shield and goggles when using the grinder.
@@AJRestoration I have done the same thing, I always thought about using a rock tumbler with the correct media.
Powder coating? Nice.
8:40 sounds like dialup 😂❤️
Saludos desde San José Costa Rica compañero lo de la pintura en polvo queda preciosa pero quier saber aque grados y que duración tuviste en el horno las piezas gracias ( PURA VIDA )
Un peu déçu tu nous as habitué à mieux au niveau des finitions les fissures et les cassure ne sont pas réparer À part ça comme d’habitude très bon travail merci pour la vidéo
1981 oh please, I've got one from my great grandfather that's from WWII, a factory that produced tractors normally and I still use it to sharpen my tools but the large stones are getting hard to find though
Wow that is old! like 1945 atleast.
I don't know who are the 40 people who disliked. They must be seriously frustrated not to be able to do the same work ! 😃
It's currently 58 spastic individuals. Really? Thumbs down? Come on now.
Maybe because of too much advertising
👍👏
Hey, how do you know what type of capacitor is needed for replacement? Thanks.
I peaked under my other grinders and saw a range of 4uF to 6uF. So I just went with a 5uF and it worked.
Not as critical as you may think. Most any small MFD value would work. The cap just stores up a little extra to jump the motor to spin...
@ 6:13 - man, I missed the little blue toy truck come out of the grinder :-)
I forgot to put it in the other videos haha