2000RPM grinder? What if the price is RIGHT?

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mbellek

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I have the opportunity to own a Delta 6" VS bench grinder for peanuts. Its variable speed, but the minimum is 2000 RPM. Its was an ad on a bulletin board at my local grocery store-- I went and saw it and it is in barely-used condition. The guy wants $65 for it. I saw the same listed on Amazon for $80.

The only thing is-- all of you guys have advised me that my grinding wheel needed to be 1725RPM. Is this close enough to be worth it?

(Please don't start talking about Tormeks and stuff, I can't afford to spend that much on my sharpening system... I want to get something good, but I am not in that sort of price range)
 
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I would save up a little bit more and get the Woodcraft slow speed grinder. The wheels it comes with are worth as much as the grinder itself. I think I bought mine for $65 when it was on sale with a coupon they had. Also, the 8" size wheels will give less of a hollow than the smaller 6" wheels.

Just a thought.
 
Well okay... I actually happen to have a $25 woodcraft gift card that I haven't used, so if you are talking about the one that is $95.... that would help.

So 8" wheels are the way to go? And the fact that the WC has those white wheels.... that makes it a good one too?

What does "less of a hollow" mean?
 
Originally posted by mbellek
<br />Oh, and I'm never going to need a higher speed than 1725? NEVER?
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Not for grinding turning tools.

As for 8" or 6", the larger your wheel, the less curved your grind will be.(Less Hollow) http://en.wikipedia.org/wiki/Grind for a more detailed explaination.

You'll want to get a 100 grit or higher wheel for your turning tools. Lower grits would only be used for major reshaping.
 
I use a high speed grinder, because that was what I had before I started turning. You just need a lighter touch and realize that it takes half the time to sharpen the tool.

If and when the grinder dies, then I'll by a slow speed grinder, unless of course there is a cheap one for sale for $65 that happens to be a high speed grinder.
 
Melanie, Just one word of caution.BiguyZ and Chris are right when they say that the 8" wheel will give less hollow in your grinding, but please be aware that it is the surface speed of the wheel where the grinding takes place that is the key Revolutions you need to be concerned about. The larger wheel will actually spin faster thane the smaller wheel, so you will need to grind with a light touch and cool frequently to avoid changing the temper of your tools drastically.

Rob
 
Originally posted by great12b4ever
<br />The larger wheel will actually spin faster thane the smaller wheel, so you will need to grind with a light touch and cool frequently to avoid changing the temper of your tools drastically.

Rob
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Today's MS HSS should <b><u>NEVER</u></b> be cooled in water.
 
I bought the woodcraft slow speed grinder and the grinder itself is OK however the Wheels on it are just plane JUNK they are so out of balance and out of round that I still have not be able to use it much. Been working on turing up the wheels but have about had it with them. So if you say they are good quality stones you were much luckier than me.[:(!][:(!][V]
Jay
 
Originally posted by Ron in Drums PA
<br />
Originally posted by great12b4ever
<br />The larger wheel will actually spin faster thane the smaller wheel, so you will need to grind with a light touch and cool frequently to avoid changing the temper of your tools drastically.

Rob
Click to expand...


Today's MS HSS should <b><u>NEVER</u></b> be cooled in water.
Click to expand...

Ron, if you noticed, I NEVER said to cool in water, I just said to cool frequently!! Also, I remeber Melanie stating on one of her previous posts that her tools threw sparks like a sparkler when she ground them, leading me to believe they were not MS HSS steel.

Rob
 
Awwww Rob, you remember that?

I actually have new tools now (I'm building up my own shop right now which is why I'm buying a grinder) and my tools are now HSS ... I just got them and haven't even used them yet. (Through a set of unfortunate circumstances, I have not turned in a couple weeks... It's a long story that can be summed up in one word: "In-Laws")
 
Originally posted by woodman928
<br />I bought the woodcraft slow speed grinder and the grinder itself is OK however the Wheels on it are just plane JUNK they are so out of balance and out of round that I still have not be able to use it much. Been working on turing up the wheels but have about had it with them. So if you say they are good quality stones you were much luckier than me.[:(!][:(!][V]
Jay
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I thought I had read good things about the 8" woodcraft grinder on here..... I thought the whole point of that grinder (according to the description on the website) is that it has these great high-quality wheels....

My minimum requirements are this: I want a grinder that has a minimum speed of 1725--whether it has higher or not, I don't care. And I want to get out the door for less than $120.
 
I have a delta variable speed 6 inch grinder that usually costs quite a bit - got it for about 70 bucks second hand, but not used.

Came with a white friable wheel and a grey one - replaced the grey one with a 120 grit blue friable wheel...

Not sure what the minimum speed is, but it works well enough for me - probably the same thing you were looking at.

Andrew
 
Originally posted by woodman928
<br />I bought the woodcraft slow speed grinder and the grinder itself is OK however the Wheels on it are just plane JUNK they are so out of balance and out of round that I still have not be able to use it much. Been working on turing up the wheels but have about had it with them. So if you say they are good quality stones you were much luckier than me.[:(!][:(!][V]
Jay
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I may be wrong here, but don't most wheels require to be trued?? That's why you buy a wheel dresser. $10 at Woodcraft. As far as I know, this would apply to all wheels... Like most pieces of equipment, some setup/ tuning is necessary.
 
Originally posted by great12b4ever

Ron, if you noticed, I NEVER said to cool in water, I just said to cool frequently!! Also, I remeber Melanie stating on one of her previous posts that her tools threw sparks like a sparkler when she ground them, leading me to believe they were not MS HSS steel.

Rob
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I noticed, just making sure others realize what one shouldn't do.
Also, Melanie may not be an expert in sparks. M2 does spark although not near as much as high carbon steel.

As you know, only high carbon steel should be dosed in water.

BTW - MS was a typo, it should be M2. Sorry if that lead to any confusion.
 
Melanie,

Not to add more confusion here but from what I read (and my understanding)...

It is NOT recommended to cool a "RED HOT" HSS tool in water...as the sudden temperature change may cause microscopic cracks in the steel weakening it in the process. If the steel is not that hot you can actually use water to keep it cooler. This is the concept behind Tormek and Jet wet grinders.

Slower grinder (less than 1800 rpm) will reduce the likelihood that you will reach the higher "red hot" temperature too.

Like everyone, at $65.00 I would suggest you buy the 8" WoodCraft slow grinder too even if it is a bit more.
 
Yes you must true up any new wheel and I am working on it but these thing are out of balance and wobble side to side and I have already taken off more than 3/16" off of the wheel and there is still a flat spot on them. [:(!][:(!][:(!][V][V]
Jay
 
Originally posted by woodman928
<br />Yes you must true up any new wheel and I am working on it but these thing are out of balance and wobble side to side and I have already taken off more than 3/16" off of the wheel and there is still a flat spot on them. [:(!][:(!][:(!][V][V]
Jay
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If there is a side to side wobble, I would start by checking the mount first (i.e. re-mount the wheel and shim if needed) before truing it up.
 
Dario
The first thing I did when I received the grinder after taking it out of the box was to remove the wheels and ping test them. This is what everyone should do as it will tell you if there is a cracked wheel. While they were off I checked for runout on shafts etc. As I said the grinder itself I am happy with its a good grinder for the money and I would buy it again. However the wheels that they are bragging about, NOT so happy with. I have tried to take the wobble out of them and have removed some of it, but the out of balance problem Im still working on. I am just getting tired of working on bad wheels and when I can afford better wheels they will be installed and then I will sell these HIGH QUALITY WHEELS on the cheap.[:D]
Jay
 
Originally posted by woodman928
<br />Dario
The first thing I did when I received the grinder after taking it out of the box was to remove the wheels and ping test them. This is what everyone should do as it will tell you if there is a cracked wheel. While they were off I checked for runout on shafts etc. As I said the grinder itself I am happy with its a good grinder for the money and I would buy it again. However the wheels that they are bragging about, NOT so happy with. I have tried to take the wobble out of them and have removed some of it, but the out of balance problem Im still working on. I am just getting tired of working on bad wheels and when I can afford better wheels they will be installed and then I will sell these HIGH QUALITY WHEELS on the cheap.[:D]
Jay
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Jay ~ Obviously I'm no expert in grinding wheels, but remember as well that if the wheels are THAT bad, you have a 90-day warranty with Woodcraft. If you bought the grinder from the website, you may contact Woodcraft and they will arrange for FedEx to come and pick it up for a return-- all at THEIR expense.

After reading your assessment of this grinder, I checked on the return policy before I purchased.

You seem very unhappy with yours, and everyone else seems to think it is a good grinder, so I'm wondering if yours needs to go back??
 
Melanie
You are so right I should have sent it back and I would have but I went in for Back Surgery before I had a chance to check it all out and by the time I got well enough to take care of it the warranty was WAY overwith.
I do like the grinder just a problem with the wheels I don't feel they are of the quality they say, but I am used to using pro machines so that may be some of the problems I am having with the wheels.[:D]
Jay
 
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