Is that a common grinder? I've never seen that type of grinder before. My school shop had some very large grinders, but they were conventional without a vacuum attached to them. The grinder in your video looks like it has a hepa vacuum hood around it? Also, a side note. Using a battery powered 1/4" impact driver is the best way to install and remove grinder nuts, and sawblade nuts. Because there is no risk to damaging yourself with a sawblade, or accidentally damaging the grinding wheel by trying to hold it, while using a wrench on the arbor nut. The impact gun doesn't even require that you hold onto the blade or grinding wheel, you can just impact it tight, without worrying about damaging anything, and the nut will be much tighter, so it's safer and won't slip. You need to use the 1/4" hex drive impact drivers, the kind that are used for installing screws, these are unable to cause catastrophic damage by going too tight.
Thanks for a great informative video. I would like to add that balancing a 1/2 inch wide wheel is pointless and a total waste of time in a tool room. Get a sopko hub without weights for 1/2 inch wheels and save the balancing hub for 1" wide wheels. Over 30 years precision grinding and I have never once needed to balance a 1/2 inch wheel. Sometimes I change wheels multiple times a day. I probably have 50 wheels on a pegboard. One inch wide wheels that will stay mounted until they wear out on a wet grinder should be balanced.
Thank you for explaining this process so clearly, Mark! I'm trying to get up to speed on surface grinding with my recently acquired Covel model 35 (8×24)...and its a challenge. You make it seem easy 😅
I'm a blacksmith who appreciates your content immensely Marc. Your videos keep me striving forward because accuracy is hard and making things aint easy. If I can improve my work simply by watching your content then you're doing Einstein proud. ( I have, thank you)
To balance a grinding wheel, first, take out all the weights, put the wheel on the balancing stand, let it come to a stop, and put the first weight opposite of the heavy spot. That one then goes Under.. the other 2, symmetrically on approximately 120°., then rotate Left or right by 90° and let go. Let's see we have the first weight on the left, if the wheel then rotates right, the 2 other weights are too high.. lover them both and repeat the check.,
Salut Marc, À 11:45 de ta vidéo, tu fais référence à un « wheel balancing apparatus ». Sans être machiniste en herbe (chus plus perdu dans l’bois, mettons), j’aimerais être en mesure de pouvoir faire de même chez moi mais est-ce que ce genre d’appareil précis (j’ai vu le prix du niveau Mitutoyo), existe-t-il qqchose d’abordable sur le marché qui me permettrait de faire la même chose chez moi? Merci et au plaisir de te relire.
a couple of tips-I like his videos. However he did not dress the sides of the wheel as far up as you can possibly get. That is where most of the imbalance is. when he dresses the wheel to rough out a new wheel the tip of a good diamond will burn off flat in record time. I suggest using a roughing diamond then using a good diamond only after balancing to give a final dress and conserve that diamond as long as possible. when he uses the master leveler on the balancer--actually its far faster and more accurate to lay any surface ground block on the rails and use a big steel ball bearing maybe 1 inch that they almost give them away. adjust till the ball does not roll. great even for leveling machines or surface plates I never use a level anymore and sold the one I had as having zero use and unnecessary weight in a tool box to lug around. they are vintage items not used anymore. that wheel hub is a balancing system using the 3 weights method. The simple fact is although a person can fidget endlessly he did not use the system correctly. take the 3 weights out. mark heavy. put the weights back in equally and symetric to the low or high mark. One weight at top of low up on top. now take the other two weights and move them up equally moving heavy towards the light. visualize you have your two arms down and you raise your 2 hands up equally. weights are never fidgeted with as shown-thats the simple truth. it can be done but what it does is confuse beginners and its best to take all three out and do them in the normal manner so even a beginner gets instant results. when balancing a wheel in a true life work dog eat dog environment there is not the time to fumble it has to be done fast. balancing a wheel using good stuff like he has--should be able to be done in 2 minutes max.
Mark, Thank you for the primer. I do have a question. I just purchased three new hubs for my surface grinder. The weights, three Allen set screws, and three ball bearings are in a package. The ball bearings are a size that enables one to drop them into the threaded hole at the center of the weights. If one does that, however, inserting the set screws and turning them merely jacks up the entire weight. So, what am I missing?
Hi Marc I hope the student don’t get hurt , Some time bad things brings goodness . If the accident didn’t happen I can be in a huge trouble I just trying buy a surface grinder ,but if I don’t see this video I don’t find was damage thanks for this value information and thanks again for your help and explain my best wishes for you and your family and also your students God bless you
Thanks Etienne (and condolences) for precipitating this lesson. Thank you Marc for explaining these important yet seldom encountered aspects of surface grinders.
There's also a semi-static way to operate this apparatus. Once you have obtained the balance that you can using your method of "seeing that it doesn't start rotating", position the wheel at one end and give it a very gentle nudge. Note where it stops rotating. So this several times to ascertain that the wheel does not stop at the same angle repeatedly. If it does, then you know that you have to fine tune the balance of your wheel. I learned this trick fixing watches. If you don't have a dynamic balancer and you need it balanced as much as possible, then you can't do better than this.
Hi Marc, enjoyed the instructional , makes me remember the learning curve when we got the "cold saw" at the steel mill and the production staff learned the hard way why they included a bunch of blotters with the 9 foot wheels! Only suggestion I have is you did not give any setup detail on the diamond arrangement, although the second setup demonstrated the angling nicely. Cheers and bon santé mon ami!
Professional explaining of grinding wheels, much appreciate it! And as a beginner of selling grinding wheels, cutting wheels, pcd inserts, so much to learn, will always watch your video. Thank you!
I might never go back to one of my favorite stores. I went into "The General Store" and asked to get a bench grinder wheel. They said they didn't carry them. They have a hardware store that is part of the larger sporting goods store, so it's basically a large hardware store inside a very large warehouse sporting goods store. The manager and an employee showed me where their grinding stuff was, and said they didn't have any grinding wheels for a bench grinder. I was a bit sad, and I told them it seemed like something you should definitely keep in stock. Then the manager said "well, they aren't something people buy, you don't need to replace grinding wheels." Both the employee and the manager talked back and forth and justified the manager's comment, and they both said that you just don't ever need to replace bench grinder wheels, so they don't need to sell them. I couldn't believe they tried to create excuses for why they didn't need to sell grinding wheels. It seemed like a horrible way to treat the customer. I ended up leaving quickly and decided to never go back. Ummm.. If you sell grinding wheels for $15 each, people will buy them frequently, because it's nice to have a fresh grinding wheel on a big project.
Marc, I am confused. Does the hub assembly you extract from the grinder have counterweights in a groove? If this is true, I suppose any commercially produced hub would have provisions to balance the grinding wheel. I was going to make up some hubs for my surface grinder but may need to reconsider or see a blueprint/diagram for a viable hub.
@@anonymic79 The reason I mentioned it was I've been getting below par surface finish on parts, and I had a sharp right angle I needed to grind in tight, so I decided to clean up the face of the wheel and it actually took a lot more passes than I would have expected (I'm guessing that cup wheels are what's called for it this situation, but I didn't happen to have one at the time). I'm an amateur at this so, I know I don't know anything, just enough to get me in trouble.
Is that a common grinder? I've never seen that type of grinder before. My school shop had some very large grinders, but they were conventional without a vacuum attached to them. The grinder in your video looks like it has a hepa vacuum hood around it? Also, a side note. Using a battery powered 1/4" impact driver is the best way to install and remove grinder nuts, and sawblade nuts. Because there is no risk to damaging yourself with a sawblade, or accidentally damaging the grinding wheel by trying to hold it, while using a wrench on the arbor nut. The impact gun doesn't even require that you hold onto the blade or grinding wheel, you can just impact it tight, without worrying about damaging anything, and the nut will be much tighter, so it's safer and won't slip. You need to use the 1/4" hex drive impact drivers, the kind that are used for installing screws, these are unable to cause catastrophic damage by going too tight.
Thanks for a great informative video. I would like to add that balancing a 1/2 inch wide wheel is pointless and a total waste of time in a tool room. Get a sopko hub without weights for 1/2 inch wheels and save the balancing hub for 1" wide wheels. Over 30 years precision grinding and I have never once needed to balance a 1/2 inch wheel. Sometimes I change wheels multiple times a day. I probably have 50 wheels on a pegboard. One inch wide wheels that will stay mounted until they wear out on a wet grinder should be balanced.
Thank you for explaining this process so clearly, Mark! I'm trying to get up to speed on surface grinding with my recently acquired Covel model 35 (8×24)...and its a challenge. You make it seem easy 😅
I'm a blacksmith who appreciates your content immensely Marc. Your videos keep me striving forward because accuracy is hard and making things aint easy. If I can improve my work simply by watching your content then you're doing Einstein proud. ( I have, thank you)
Many thanks Marc. All the best for 2020.
enjoyed...great discussion/demonstration
Thank you Mark. I miss your trademark "Have Fun - Be safe n Happy machining" motto being said in the original way...
To balance a grinding wheel, first, take out all the weights, put the wheel on the balancing stand, let it come to a stop, and put the first weight opposite of the heavy spot.
That one then goes Under.. the other 2, symmetrically on approximately 120°., then rotate Left or right by 90° and let go.
Let's see we have the first weight on the left, if the wheel then rotates right, the 2 other weights are too high.. lover them both and repeat the check.,
Change of pants required when he did it😧👍👍🏴
Salut Marc,
À 11:45 de ta vidéo, tu fais référence à un « wheel balancing apparatus ». Sans être machiniste en herbe (chus plus perdu dans l’bois, mettons), j’aimerais être en mesure de pouvoir faire de même chez moi mais est-ce que ce genre d’appareil précis (j’ai vu le prix du niveau Mitutoyo), existe-t-il qqchose d’abordable sur le marché qui me permettrait de faire la même chose chez moi? Merci et au plaisir de te relire.
You need to dress sides of your wheel also...There is loads of balance error when sides aren't dressed.,.
Great, very helpful.👏👏
a couple of tips-I like his videos. However he did not dress the sides of the wheel as far up as you can possibly get. That is where most of the imbalance is. when he dresses the wheel to rough out a new wheel the tip of a good diamond will burn off flat in record time. I suggest using a roughing diamond then using a good diamond only after balancing to give a final dress and conserve that diamond as long as possible.
when he uses the master leveler on the balancer--actually its far faster and more accurate to lay any surface ground block on the rails and use a big steel ball bearing maybe 1 inch that they almost give them away. adjust till the ball does not roll. great even for leveling machines or surface plates I never use a level anymore and sold the one I had as having zero use and unnecessary weight in a tool box to lug around. they are vintage items not used anymore.
that wheel hub is a balancing system using the 3 weights method. The simple fact is although a person can fidget endlessly he did not use the system correctly. take the 3 weights out. mark heavy. put the weights back in equally and symetric to the low or high mark. One weight at top of low up on top. now take the other two weights and move them up equally moving heavy towards the light. visualize you have your two arms down and you raise your 2 hands up equally. weights are never fidgeted with as shown-thats the simple truth. it can be done but what it does is confuse beginners and its best to take all three out and do them in the normal manner so even a beginner gets instant results. when balancing a wheel in a true life work dog eat dog environment there is not the time to fumble it has to be done fast. balancing a wheel using good stuff like he has--should be able to be done in 2 minutes max.
I was about to mention dressing the sides of the wheel.. ..and without a doubt...you get tons of error from sides of wheel....
Was a runout check done after the repair?
I now know a bit more about machining. Thank you Marc!
I have a diamond dresser
Mark, Thank you for the primer. I do have a question. I just purchased three new hubs for my surface grinder. The weights, three Allen set screws, and three ball bearings are in a package. The ball bearings are a size that enables one to drop them into the threaded hole at the center of the weights. If one does that, however, inserting the set screws and turning them merely jacks up the entire weight. So, what am I missing?
Great tutorial😊. Thanks for not drilling holes in it 🤣.
Hi Marc I hope the student don’t get hurt , Some time bad things brings goodness . If the accident didn’t happen I can be in a huge trouble I just trying buy a surface grinder ,but if I don’t see this video I don’t find was damage thanks for this value information and thanks again for your help and explain my best wishes for you and your family and also your students God bless you
Thanks Etienne (and condolences) for precipitating this lesson. Thank you Marc for explaining these important yet seldom encountered aspects of surface grinders.
There's also a semi-static way to operate this apparatus. Once you have obtained the balance that you can using your method of "seeing that it doesn't start rotating", position the wheel at one end and give it a very gentle nudge. Note where it stops rotating. So this several times to ascertain that the wheel does not stop at the same angle repeatedly. If it does, then you know that you have to fine tune the balance of your wheel. I learned this trick fixing watches. If you don't have a dynamic balancer and you need it balanced as much as possible, then you can't do better than this.
Hi Marc, enjoyed the instructional , makes me remember the learning curve when we got the "cold saw" at the steel mill and the production staff learned the hard way why they included a bunch of blotters with the 9 foot wheels! Only suggestion I have is you did not give any setup detail on the diamond arrangement, although the second setup demonstrated the angling nicely.
Cheers and bon santé mon ami!
Thank you for your patient explenations to us 👌 this is just exelent!
nicely done, very interesting .. Thanks for sharing! More videos please :)
Professional explaining of grinding wheels, much appreciate it! And as a beginner of selling grinding wheels, cutting wheels, pcd inserts, so much to learn, will always watch your video. Thank you!
I might never go back to one of my favorite stores. I went into "The General Store" and asked to get a bench grinder wheel. They said they didn't carry them. They have a hardware store that is part of the larger sporting goods store, so it's basically a large hardware store inside a very large warehouse sporting goods store. The manager and an employee showed me where their grinding stuff was, and said they didn't have any grinding wheels for a bench grinder. I was a bit sad, and I told them it seemed like something you should definitely keep in stock. Then the manager said "well, they aren't something people buy, you don't need to replace grinding wheels." Both the employee and the manager talked back and forth and justified the manager's comment, and they both said that you just don't ever need to replace bench grinder wheels, so they don't need to sell them. I couldn't believe they tried to create excuses for why they didn't need to sell grinding wheels. It seemed like a horrible way to treat the customer. I ended up leaving quickly and decided to never go back. Ummm.. If you sell grinding wheels for $15 each, people will buy them frequently, because it's nice to have a fresh grinding wheel on a big project.
Marc, I am confused. Does the hub assembly you extract from the grinder have counterweights in a groove? If this is true, I suppose any commercially produced hub would have provisions to balance the grinding wheel. I was going to make up some hubs for my surface grinder but may need to reconsider or see a blueprint/diagram for a viable hub.
dont make up no hubs at all simply use jb weld and tiny weights up next to the blotter.
Thanks Marc
Ok, now, what about the front and back face of the grinding wheel?
@@anonymic79 The reason I mentioned it was I've been getting below par surface finish on parts, and I had a sharp right angle I needed to grind in tight, so I decided to clean up the face of the wheel and it actually took a lot more passes than I would have expected (I'm guessing that cup wheels are what's called for it this situation, but I didn't happen to have one at the time). I'm an amateur at this so, I know I don't know anything, just enough to get me in trouble.
@@anonymic79 Ok, I'll look into that, thank you