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  #1  
Old 09-22-2008, 06:02 PM
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Fla Jim Fla Jim is offline
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Default Review of Harbor freight 46727 tool grinder

Harbor freight 46727 Grinder.
I picked this up last Saturday, on our weekly trip to Harbor Freight. It was on sale for $149.00. I borrowed 1911mans 15% off coupon, and got it for $131.00 and change out the door. I read reviews on Practical machinist, and, Home shop machinist. Reviews were generally ok. Most listing it as an “HF kit project”. Mine proved no exception. After initial assembly one of the drip pans wouldn’t fit. An application of a larger drill size on one of the mounting holes fixed that. The main problem is the tables wouldn’t tilt.

The problem had several faults. The trunnions are die cast aluminum. Evidently the molds are either poorly made, or worn out. There are burrs, and the trunnions are out of square, so when they are tightened on the tables they bind.
First I deburred the grooves and the side that mounts on the grinder base. When fitting, I notice one of the trunnions pins was burred. A little filing took care of that.
Then I milled the side of the trunnions that clamp to the tables on the Bridgeport. This squared everything up.
The more I use the new mill the more I like it.
When I remounted the tables, everything actually tilted pretty smoothly.
Much has been said about the supplied wheels. Most don’t like them. Wholesale tool has AO replacement wheels. For about $27.00. However I ground a ½” HSS bit with a general purpose grind.. The supplied wheel did a beautiful job.
I mostly use HSS on my lathe
I didn’t try any carbide yet.
Overall like I said, I consider this to be a “kit”. Mine was unusable out of the box. How ever some people on the forums have reported getting a good one out of the box. Either they don’t use the features such as the tilting tables, or they’re extremely lucky.
You could spend about $600.00 and get a “Baldor”, try your luck on the “Bay”, or do like I did and buy the “Kit”. I spent most of the day getting this to run including a side trip to take Dogzilla to the dog park, and writing this review.

Jim
The photos:
Filed trunnion pins
Trunnion rough with burrs
Deburred trunnion
Milling one of the trunnions
Trunnions mounted
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Jim the Shop Rat
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How a politician stands on the Second Amendment tells you how he or she views you as an individual... as a trustworthy and productive citizen, or as part of an unruly crowd that needs to be lorded over, controlled, supervised, and taken care of.
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Last edited by Fla Jim; 09-22-2008 at 06:11 PM.
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  #2  
Old 09-22-2008, 06:04 PM
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Fla Jim Fla Jim is offline
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The rest of the pictures;
The tables mounted
Ground 1/2" HSS bit on the lathe
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Jim the Shop Rat
From Jim’s Magic Garage®

How a politician stands on the Second Amendment tells you how he or she views you as an individual... as a trustworthy and productive citizen, or as part of an unruly crowd that needs to be lorded over, controlled, supervised, and taken care of.
???'?? ???'?
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  #3  
Old 09-22-2008, 08:46 PM
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Charlie C Charlie C is offline
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Maybe I got lucky. The one that I purchased I had to make new backing plates for the wheels. The ones that came with the grinder had large voids in the casting that they just machined through.
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  #4  
Old 09-23-2008, 07:56 AM
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rmack898 rmack898 is offline
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Quote:
Originally Posted by Charlie C View Post
Maybe I got lucky.

Maybe I was luckier still. The one I got was quite useable right out of the box including functional trunions. The on sale price + a % off coupon make this another HF gem. I know it's a waste but I use one side for nothing but tungstens with the stock green wheel.

Jim, could you provide a link for the AO wheel for $27 ?
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Old 09-23-2008, 08:54 AM
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Fla Jim Fla Jim is offline
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Quote:
Originally Posted by rmack898 View Post
Maybe I was luckier still. The one I got was quite useable right out of the box including functional trunions. The on sale price + a % off coupon make this another HF gem. I know it's a waste but I use one side for nothing but tungstens with the stock green wheel.

Jim, could you provide a link for the AO wheel for $27 ?
wholesale tool:
http://www.wttool.com/category-exec/...up_Wheels_CGW_
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Jim the Shop Rat
From Jim’s Magic Garage®

How a politician stands on the Second Amendment tells you how he or she views you as an individual... as a trustworthy and productive citizen, or as part of an unruly crowd that needs to be lorded over, controlled, supervised, and taken care of.
???'?? ???'?
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  #6  
Old 09-23-2008, 10:04 AM
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rmack898 rmack898 is offline
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Thanks Jim
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One extremely happy former convict of the penal colony that lies between NY, PA, and DE. Now living the good life much further south. where they don't know what fucking Carhartts are.
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  #7  
Old 10-13-2008, 05:28 PM
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platypus20 platypus20 is offline
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Jim,

most of the threaded holes on mine were not really threaded, I had to clean up the holes and retap them. The screw hole to hold the wheels to the backing plates were stripped, I ordered new backing plates, they were $6 ea, the cost of shipping was more than the wheels. Other than that mine has been fine, the tables tilt, the drip pans fit and runs very smoothly. Mine was on sale for $99, when I bought it, about 3 years ago.

jack
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Last edited by platypus20; 10-19-2008 at 08:14 AM.
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