Tips & Tricks for O D grinding on the surface grinder
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- Опубліковано 31 січ 2018
- This video will demonstrate the importance of lining up the center line of your spin fixture with the Y traverse of the surface grinder when doing O.D grinding. Link to ID grinding on the surface grinder • Turning a surface grin...
Link to Jig grinding on surface grinder • Jig grinding with a NS... - Наука та технологія
Link to Mechanical Advantage ua-cam.com/channels/lX2m8Uo6bJkqnRdoGJLcQQ.html
Link to DCteacher1 ua-cam.com/channels/fykRE-QfJ_8hlk5ARsAmIg.html
Link to Engineer Bruns ua-cam.com/channels/RMxcpgVb1Lo4r5tiRQkjkA.html
Steve
Hey Steve, Thanks for the tip on Engineer Bruns, he is very entertaining.
You're welcome Warren,
Andriy is a very clever man and his videos are well done. Very entertaining.
Steve
Hi Warren,
I am glad you like his channel. He puts a smile on my face every time I watch his videos.
Steve
Greatest Machining Teacher in the World is this Russian guy:
ua-cam.com/users/Eksmastvideos
I'm not a CNC guy but even still I like watching youtube channel Edge Precision.
And nice demonstration on cylindrical grinding. Thanks.
Hi Greg,
I agree! Peter has some of the best content in my opinion. I really enjoy his videos and have learned a lot from him.
Steve
Learning how something works is where it all starts. Learning how it breaks is where it starts getting good. Learning how to fix it is where you start getting good. You've got some of all three in this video, thanks mate!
You're Welcome somebody else.
Steve
Excellent vids Steve and sons... Very cool. Please continue....!
Thanks Daniel,
Glad you enjoyed it. Should have another one 02/03/20.
Steve
Excellent. Thank you for all of the effort put into your videos. You guys are doing great work.
Thanks John,
The videos are fun but they are a lot of work. Knowing others are enjoying them brings us joy.
Steve
Great video! Thanks for sharing your tips& tricks.
You're welcome Ken.
excellent !
Great explanation and demo
Wont find this experiential wisdom in a book.
I really enjoy and appreciate your videos.
Dan
Thanks Dan
Is there a grinding 'bible', like Connelly's book for machine tool rebuilding?
Hi somebody else,
Good question! If there is I am not aware of it.
Steve
Just started playing around with the surface grinder at work. Great information!
Awesome! Thank you!
Hey Steve, enjoyed the show, it's great to share OD tips and tricks :)
Thanks Stan, I feel the same about you.
Steve
Nice informative and easy to understand video. I’ll have to watch a few more times, well....a lot more . Thanks for sharing
Hi Ron, hopefully you will find a few good pointers in this video that may be helpful to you.
Steve
I’m also in the grinder workshop pre bash Friday, hope to get some good info there too. Really looking forward to it. Have an Abrasive 1 1/2 I’m cleaning and doing three ph.
Hi Ron looking forward to meeting you. I already watched a few of your videos on your grinder. Looks like you are doing a nice job.
Steve
Thanks for this explanation. I just purchased a HF surface grinder and have a cylinder square to make !
You are welcome.
Steve
Thanks for spreading the knowledge. Wish I could give 2 thumbs up
You're welcome Bobby.
Steve
Bobby Vincent I'll help!
Some real nice tips in this video I can use, thanks :-)
Thanks Dale,
Do you have your grinders mounted on those nice stands you built yet? ua-cam.com/video/ieFgerIk5HM/v-deo.html
Great video, learned alot there.
Thanks Randy.
Good stuff Steve, enjoyed!
ATB, Robin
Thanks Robin.
Steve
Great lesson. Thanks for your effort. Adam must have very strong arms to hand hold that camera so well for so long.
Hi Michael,
Adam is the quit behind the scene man who make me appear better than I really am. He is a great son and a great role model for his brothers and sisters. He is learning as he goes and surprises me with his progress in filming and editing these videos. We both have much to learn yet but it is great being able to work with him and learn together.
Steve
I just grind right on center but my fixture is always set square. Ground some D2 punches recently on a harig head and no problem with taper. Stamping mylar so shot for 0.0001 a side clearance on punch guide and 0.0002 on die. Next time i find a little taper i will try going off center but don't think it matters much if care is taken to get fixture square. I was grinding a form with 2 different size radiuses and 2 flats. If I'm off center tangent points will be off so going off center in that situation would be bad. Nice video and ty.
You are welcome.
Since Suburban Tool channel apparently went dark looking forward to studying on your channel. 1st time amateur owner/grinder.Most interested in wheel types for material to be ground.
Hi Rick,
Glad to have you. I notice that Suburban post a hot rod video and in the comments it looks like Don will be doing some more videos soon. I like their channel too.
Steve
Sub tools did a couple videos on a machine installation. In one shot they showed Don walking and he look like he was having problems. I hope he still does some more videos.
Hi Solid Rock,
Is there a reason why the rotation of the part is against the wheel direction? Any benefits to rotating with the wheel?
It may have to do with me running my mouth and not paying attention to the rotation direction. I prefer going with the rotation rather than against it.
Steve
Great video! Thanks for sharing your knowledge.
One question: when you set up the spin fixture and end up with a taper, how do know which way (plane) to correct? Left/right or up/down?
Hi Juerg,
By going .01" to .02" to the left of the center line of the grinding wheel in relation to the center line of the spin fixture I only have to adjust the up/down. That is assuming you have the center line of the spin fixture running parallel to the Y axis. If the diameter is big at the farthest of the stick out then you need to adjust up. If it is small then you have to adjust down.
Steve
Thanks Steve. What if it error comes form a spin fixture axis that is not parallel with the Y axis (lets say from a mistake setting up). Would you still go to the up/correction to compensate, since the wheel is offset and is making a taper?
Hi Juerg,
That would be much harder to work out the taper because if you adjust the up and down when it really needs a Y axis alignment you will never get it just right. One way to line up the Y axis real close is to put a part with a shoulder in your spin fixture and take a clean up cut on the shoulder with the side of the grinding wheel and set your dial or readout to zero. Make sure the side of the wheel is relieved so that you have a very thin section of the side of the wheel that cuts.Then pull the wheel back off the shoulder of your part and ink the shoulder with a Sharpe marker. Then slowly wind the wheel up to the shoulder of the part with the spin fixture off so the part is not rotating. Just barely touch the shoulder with the wheel and back off the part so you can see the shoulder. If you have a nice even line on both sides of the shoulder then the Y axis is lined up good. If you have a line on one side but not the other then you have to adjust the spindle fixture side to side until you have an even thickness line on both sides of the shoulder. Maybe we will do a video showing this technique in the near future.
Steve
Thank you Steve! Very good explanation. I'm looking forward to see more videos from you guys.
Steve,can you post a video of how to use a Harig grind all also show how to check it out to see if it ok or adjustment!🤓
Hi Raymond,
I do not have one of those right now so I would not be able to do the video. I just finished looking at the pictures you sent. Looking forward to seeing the restoration and sharing the before and after pictures with the viewers.
Steve
👍💯
I noticed a repetitive stutter in your grinding even after multiple passes. What is causing that? wheel balance? Something in the spindle on the spin fixture? When grinding off center does it try to lift the part any from the cutting forces? I could see that becoming an issue next especially when grinding cantilevered.
Hi Brian,
It is in the drive belt where the 2 ends are fused together. You can see it under an indicator. It is about .0001 TIR.
Steve
Hi again Brian,
I have a few ideas on how to fix that issue. I have seen this issue on other Harig fixtures of this same model. When you spark out as I have it is less than .00005 indicator bounce. The bearings in this unit are not as good as in some of the other Harig spin fixtures but it is a cheaper unit. For a lot of the things we do it is accurate enough. One of my new project well be a fixture to grind between centers and that will be more accurate than this unit. I see in your last video that you have a lot of insulation hung in your shop. I am guessing you have much more now, can you tell a big difference in heat yet?
Steve
It has made some difference but not alot. Until I can get a ceiling in or do something about the roof vents all tyhe heat will just continue to go up and out. Maybe you could take some sandpaper to that spot in the belt and smooth it out?
Hi Brian,
There is a very slight miss match where the 2 ends connect but I think the problem is that it does not flex as good at that point and I think that is the problem. I am going to try to find some seamless o rings and see if that will make a difference. I may have to add a idler wheel to compensate for stretch as it gets used.
Steve
Hi steve, could you please advise how to grind aluminium plates for best results?
Hi Fischer,
Aluminum is hard to grind. I think that would make a good video. Aluminum likes to load the grinding wheel because it is very soft and it wraps around the individual grit. Wheel selection is important and the best results I have so far is to use undiluted coolant in a cup and use a brush to apply it to the work piece. I just talked to Adam
and we will start working on a video right now and hopefully have it posted by tomorrow. I have never used some of the newer wheels on aluminum so it will be a learning curve for me as well.
Steve
Solid Rock Machine Shop Inc. Thanks steve! Can hardly wait. Also ...i need to grind a plate which is larger than my x movement. Is it possible to move the part and grind it in two operations or i would lose precision? Movement is 280 mm, part is 550, aluminium, blow mold plates.
Hi Fischer,
We just finished your video. I think you will be surprised at our conclusions. To give a tease, I only had small pieces of aluminum but the first wheel I selected worked so well I had to throw in the towel. The part was only about 2.625" * 2.75" but I took .031 off at .001 at a time trying to load the wheel. I gave up after .031without redressing and the finish was great and less than .0001 flatness. The video was going so long we only tested 2 wheels.
You will lose precision by moving the plate but you can minimize it with a good game plan. If you can bolt some very flat precision blocks to the bottom of the mold and space them just right you can get good result. Your magnet will have to be in good shape as well.
Steve
Solid Rock Machine Shop Inc. I've wondered this as well. Impressive response time!! The timing with you off work sure is helpful for the rest of us. 😁
Thanks John,
This video should be up in a few hours.
Steve
When you teased it on Instagram I thought you were going to show how to make that differential screw. Or is that a different video I missed? I have no concept how you would make that differential pitch.
Hi Jon,
I made that at my full time job on a CNC lathe. They don't allow pictures so I can't show the making of it. I am almost finished making the test blocks that I will test it on and hopefully that will be next weeks video. At this point I am not sure if it will even do what I want it to or if I just wasted many hours of free time.
Steve
Solid Rock Machine Shop Inc. Certainly not a waste if you learned something, and taught many things in the process. As I tried to think through it the only way I could think of to do it was a CNC lathe. Surely it's the easiest if you have access to one, even if there are other ways.
Hi Jon,
I agree with you. The whole purpose of this project is to learn more about the differential screw and its limits. If it does what I hope for it will be icing on the cake.
Steve
Pro Tip: While you're doing all this messing around, trying to make a surface grinder do something it wasn't designed for, or intended to do, keep you eyes open for a dedicated cylindrical grinder.... I know... I know... They're expensive... But, you have no idea how much fun it is to run a precision grinder without having all these hassles.
Hi franksalterego,
You are correct! I have ran a Jones & Shipmen OD ID over the decades. What I would really like is a Crystal Lakes grinder. Those are amazing too!
Steve
Fusion 360 is great, but FreeCAD is free for real and it's good enough for most... just a bit harder to learn maybe.
Hi Erik,
I never used FreeCAD, the price looks good.
Steve
This phenomenon is also why you shouldn't measure squareness with a cylinder square and a radius base style indicator.
Hi Simon,
Great point!
Steve
Thanks for the offset tips I always took too long to but the fixture coaxial the the Y axis, which is not perfect, and doubting where the tapper from. You made everything crystal clear to me.
Simon
Well...it does seem like a time consuming way to set it up and the finish with vibration....sorry...had to stop watching, serious, this is a waist of time for anything you want it done right...you might want to consider going to a grinding shop.
Konely King He's been grinding for decades. This is his home shop setup. The lesson is about what you can do with limited equipment. If it's not for you, it's not for you. But there's no need to insult him (particularly in ignorance of his experience) just because you aren't the target market.
Yes...just wanting the newbies to be aware of what they might run into before making this investment....I'd rather spend the money in a used little tool grinder.