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Old 03-01-2015, 08:14 PM   #1
1shot
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Default Diy 2x72 grinder build

Started my grinder build today. Using the nwg plans but modifying them. I haven't got my wheels form Sunray yet so it's not complete. I've also got to find a metal work bench.
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Old 03-01-2015, 08:15 PM   #2
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Old 03-01-2015, 09:58 PM   #3
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I don't know what you're spending on wheels and a platen but I know I spent over $500.00 bucks building my first one on just wheels alone. Here's one on Ebay and all you need is a motor under $500.00 That's the best ;price I've ever seen on a DYI grinder. In fact I just bought another platen a couple of months ago and spent over $200.00.

https://www.youtube.com/watch?v=buGjNeQngsY

Nothing wrong with DYI tools I save a lot of money doing that.
This is my next project I'm going to do with my other grinder; I'm going to build a surface grinder like this one.
https://www.youtube.com/watch?v=kazpKqIWQpA

Last edited by Bjankowski; 03-01-2015 at 10:03 PM.
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Old 03-01-2015, 10:23 PM   #4
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subscribed.let us know of final cosy
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Old 03-02-2015, 06:50 AM   #5
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So far I spent about 200 on wheels. And I bought a 3hp and a 2hp motor of craigs list for 180. The 3hp will go on this and the 2 hp will be a disk grinder. The most expensive part was the KB vfd to run the motor ($400). But it will be fully variable speed without pullies.
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Old 03-02-2015, 09:58 PM   #6
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so 690 so far?
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Old 03-02-2015, 10:02 PM   #7
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Quote:
Originally Posted by Bjankowski View Post
I don't know what you're spending on wheels and a platen but I know I spent over $500.00 bucks building my first one on just wheels alone. Here's one on Ebay and all you need is a motor under $500.00 That's the best ;price I've ever seen on a DYI grinder. In fact I just bought another platen a couple of months ago and spent over $200.00.

https://www.youtube.com/watch?v=buGjNeQngsY

Nothing wrong with DYI tools I save a lot of money doing that.
This is my next project I'm going to do with my other grinder; I'm going to build a surface grinder like this one.
https://www.youtube.com/watch?v=kazpKqIWQpA
Bob I just bought a new platten for 75 bucks from jose at pheer.I'll post a pic of new and old
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Old 03-02-2015, 10:11 PM   #8
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new,old,the original doesn't have a lot of hand room on the tool arm side
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Old 03-02-2015, 10:13 PM   #9
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Tagged for a later date all I have is a harbor freight job lol
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Old 03-02-2015, 11:14 PM   #10
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Waiting to see how this one progresses.
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Old 03-03-2015, 11:29 AM   #11
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so 690 so far?
Yeah I would say so. Lets see a pic of your whole grinder if you don't mind.
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Old 03-03-2015, 11:37 AM   #12
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when it was nice and clean.variable speed
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Old 03-03-2015, 11:54 AM   #13
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Thats a whole lot simpler design that I did. Wish I would have seen it. Still might have to borrow some things.

Where did you get that spring?
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Old 03-03-2015, 12:23 PM   #14
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I had this grinder built by pheer
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Old 03-03-2015, 01:07 PM   #15
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Quote:
Originally Posted by 1shot View Post
So far I spent about 200 on wheels. And I bought a 3hp and a 2hp motor of craigs list for 180. The 3hp will go on this and the 2 hp will be a disk grinder. The most expensive part was the KB vfd to run the motor ($400). But it will be fully variable speed without pullies.
That's the only way to go I my humble opinion. I'm running a 3 hp. Leeson with a Leeson controller on my primary 2X72.
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Old 03-03-2015, 07:50 PM   #16
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Do you really need 3 hp with one of these grinders? Are you borderline to bog it down?
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Old 03-03-2015, 07:59 PM   #17
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Do you really need 3 hp with one of these grinders? Are you borderline to bog it down?
Not really. A lot of guys use 1.5 hp, but when you shop in Craigs list sometimes you'll take what you can get.
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Old 03-04-2015, 06:59 AM   #18
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I built a NWG years ago then built a polar bear forge Grinder in a box I that if your going to build one the GIB is the best deal I sold all off them and have a KMG and I wouldn't take anything for it except may be a TW 90
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Old 03-04-2015, 07:18 AM   #19
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I built a NWG years ago then built a polar bear forge Grinder in a box I that if your going to build one the GIB is the best deal I sold all off them and have a KMG and I wouldn't take anything for it except may be a TW 90
I've never seen that TW 90. That this is crazy expensive, but looks sweet.
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Old 03-04-2015, 08:34 AM   #20
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I used one Johnny stout had its expensive but it is probably the tightest tolerance built grinder out there it runs smooth as a top no noise at all or vibration
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Old 03-11-2015, 07:25 PM   #21
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Some updates. I got my wheels in and drilled holes. Gave it a coat of paint. Need to build the platen and big wheel attachment. And I got in the VFD. Trying to upload pics but I guess I'll have to use craptalk
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Old 03-11-2015, 07:42 PM   #22
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Pics
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Old 05-03-2015, 11:26 AM   #23
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Did some more work on it yesterday. It's close to finished

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Old 05-03-2015, 04:21 PM   #24
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Looking good. It's fun and a headache at the same time. Be sure and post up the finished product. Looking forward to seeing it in action.
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Old 05-25-2015, 07:58 AM   #25
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Got some work done this week end. Just waiting on belts.
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Old 05-25-2015, 12:44 PM   #26
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Quote:
Originally Posted by 1shot View Post
So far I spent about 200 on wheels. And I bought a 3hp and a 2hp motor of craigs list for 180. The 3hp will go on this and the 2 hp will be a disk grinder. The most expensive part was the KB vfd to run the motor ($400). But it will be fully variable speed without pullies.
Looks good. Just make sure that your work rest stays parallel to and square with your contact wheel or your grinds will vary from one side of the blade to the other.

Last edited by MikeConner; 05-25-2015 at 12:50 PM.
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Old 05-28-2015, 02:31 PM   #27
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Got my belts in. Got it close to squared up, and got the small wheel attachment on.
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Old 05-29-2015, 08:50 AM   #28
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Looks good!! Wish I had the know-how to do that! I'll end up just having to buy one when I save up the $$
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Old 05-29-2015, 10:03 AM   #29
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Do you have it rigged where you are running both the grinder and the disk off of the same VFD? I set mine up that way, has been good.
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Old 05-29-2015, 01:16 PM   #30
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Do you have it rigged where you are running both the grinder and the disk off of the same VFD? I set mine up that way, has been good.
I was going to but since on is a 3hp and one is a 2hp so I couldn't do it.
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Old 07-09-2015, 02:23 PM   #31
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Well I've had to do sone over haling of my grinder I'll post s I me pics when I get all the stuff in. Here is a list of the stuff I ordered and where I ordered from.
standard platen mount, platen, and brackets from polarbearforge.Com
Platten with glass, 2 wheels, and two arms from knifegrinderparts.Com
platen chiller from Nathan the machines on bladeforms.

I also got rid of the spring in the back and put in a strut. I've got to get it welded up and I'll be good

I'm also at some point going to order a dd work rest and jig.

This got expensive quick.
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Old 07-09-2015, 02:39 PM   #32
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Quote:
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I was going to but since on is a 3hp and one is a 2hp so I couldn't do it.
You can run a 2HP and a 3HP off the same VFD. You can't run a 2PH and 3PH off the same VFD. Confused yet?

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This got expensive quick.
Yep, that's how it goes, but you'll have a sweet grinder when you're done.
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Old 07-13-2015, 01:54 PM   #33
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Nice!!
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Old 07-13-2015, 08:37 PM   #34
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Like Christmas at my house today. Now I have to find a machinest who will open a couple wholes and thread them.
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Old 07-19-2015, 05:14 PM   #35
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Got some stuff mounted today. Then I finally figured out what my wobble was. Unfortunately it is my motor so I've got to get it repaired or find a new one
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Old 08-15-2018, 09:54 AM   #36
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I built my own but I need to upgrade to a vfd controller
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Old 08-15-2018, 05:24 PM   #37
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I built my own but I need to upgrade to a vfd controller
Here is the best place I have found for VFD's
https://indsencon.com/collections/kb...ronic-products
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Old 08-15-2018, 05:53 PM   #38
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^
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Old 08-26-2018, 05:59 PM   #39
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Here is the best place I have found for VFD's
https://indsencon.com/collections/kb...ronic-products
Thanks. I am looking at upgrading the motor size as well are you running 120 or 240?
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Old 08-26-2018, 10:58 PM   #40
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https://www.driveswarehouse.com/


Have you tried these guys? Located in Dallas.
You can put single phase in a vfd and get three phase out, you must use a slightly larger (hp wise) vfd. The drive company can help with this. If anyone needs a 2hp 1750rpm motor (230/460v 3Ph), I have one that just needs bearings. Probably $25 bucks and a little time to replace them. I think is has a 3/4" shaft.


I have gotten several vfd's from them, for use on pumps and fans. They sell a hitachi that is inexpensive, you can use a potentiometer for speed control.
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Old 08-27-2018, 08:39 AM   #41
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Quote:
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Thanks. I am looking at upgrading the motor size as well are you running 120 or 240?
I run 120 input and 230/3ph output. Forward and reverse switch. Only time I ever use reverse is for grinding the cutting edge bevel. If I ever jump to a 2hp motor I will rewire for 220v input. My VFD will handle up to 2hp. So far I haven't ever needed any more power than a 1hp gives me and most of my grinding is at 30 to 60% speed anyway.

FYI, the KB comes with very good and easy to follow wiring instructions
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Old 04-14-2021, 03:59 PM   #42
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Good job there
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Old 04-14-2021, 04:02 PM   #43
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I'd like to do something similar
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Old 04-14-2021, 05:20 PM   #44
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Wow, it looks very impressive. I can see that you clearly know what you're doing. My friend and I also tried to make a similar grinder in my garage, but we faced a huge number of problems both mechanical and electronic. At one point, we even had to replace the new Automation Parts that were a replacement for the burned-out parts. This would simply not have been possible without the help of my father, who is much more experienced than we are in this field. But I still believe that this experience will be useful in the future and I will be able to do it as well as you

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Old 04-14-2021, 06:05 PM   #45
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Exciting times. I don't know how grinder makers make any money. I got curious one time and started looking around at all the parts I'd need to make a grinder, and it came up to almost would I could've bought a grinder for.
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