DELTA GR275 6-Inch Variable Speed Grinder with Tool-Less Change
by Delta
(Click here)
Product Details
Manufacturer: DeltaModel: GR275
Product features:
- Patent-pending quick change nut and tool-less wheel cover for ease of wheel change
- White friable wheel for sharpening
- Tool-less quick change
- Grinding wheel
- Powerful 2.0 A induction-type motor for long-lasting, smooth performance; Adjustable tool rests compensate for wheel wear
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- SAIT 20079 Type 27 6-Inch x 1/4-Inch x 7/8-Inch 10200 Max RPM Grade A24R Long Life Depressed Center Grinding Wheels, 25-Pack
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- SAIT 20078 Type 27 6-Inch x 1/4-Inch x 7/8-Inch 10200 Max RPM Grade A24N Fast Depressed Center Grinding Wheels, 25-Pack
Description of DELTA GR275 6-Inch Variable Speed Grinder with Tool-Less Change
The DELTA GR275 6-inch Variable Speed Grinder with Tool-Less Change incorporates three different wheels for sharpening, grinding, and buffing. It features a 2.5 Amp induction-type motor for powerful performance, and has a variable speed of 2000 to 3450 RPM for a fine level of control depending on the materials you are working with. The white sharpening wheel is used for sharpening tools and chisels, and its tool rest has a drill bit rest milled into the surface so you'll get the correct angle on the tip at all times. A nut and tool-less wheel cover makes changing wheels quick and easy. The base is made of cast iron for durability and stability. An independently switched 40-watt work lamp with a flexible goose neck illuminates the work area while you're working. A full-size safety shield is clear and has thumb screws for easy adjustment.Tools and Hardware Reviews of DELTA GR275 6-Inch Variable Speed Grinder with Tool-Less Change
Customer Review: Tool-less - not exactly...but still a great tool for the money
Summary: 5 Stars
Amazing delivery by Amazon, ordered it on Saturday afternoon and received it Monday morning. Somehow Amazon is getting its elves and FedEx to work the weekend. No I didn't ordered with anything more special than Amazon Prime.
I justified this purchase by saying that it would pay for itself. Soon I will sell the wife's golf clubs which had accumulated the normal wear and tear but nothing dramatic. I knew that if I could give them a proper buffing job I could bring them back to "nearly new" however to do meant getting a new tool. The Delta GR275 fit comfortably in my $100 budget especially considering that it had a buffing wheel included. Assembled the grinder in a few minutes but had to take off one wheel to install the buffing wheel. The tooless feature mentioned does not really work as claimed. Were the wheels and accessories exactly the same thickness and the quick release toggle nuts machined more carefully then it might work as claimed. As it is the folk at the factory do use tools to tighten the nuts by screwing the left nut (lefthand thread) against the right (righthand thread) squeezing everything in the middle. I know this because my left grinding wheel was too tight such that the supplied wrench and another one I had would only bend when faced with the torque required to budge the nut. Luckily I had some big Channelock pliers I could use on the big washer under the quick release nuts and broke it loose with a screwdriver as advised in the manual. Releasing the levers on the tightly screwed nut had no effect on reducing the disassembly torque. I don't really see this as a problem as I had low expectations of the feature and knew that I could take it apart using the typical techniques used with these tools. Please note that the manual does not mention in the section on replacing wheels that the left nut is left handed and the right correspondingly right handed. The parts list does refer to them as LH and RH but these abbreviations could easily be understood as locational references not their handedness. For one not experienced with these tools it's a fact that is important to remember.
After a little research on buffing I realized that I couldn't use multiple polishing compounds with one wheel effectively. I needed a dedicated wheel for the coarsely ground emery compound. After a short trip to HD I soon had two buffing wheels mounted and a variety of buffing compounds. You need to remove the outer covers and tool rests to get access to the buffing wheels. Soon I developed a process of wet sanding using 400 grit sandpaper until the scratches disappeared. Once done the emery wheel polished the satin finish left by the paper. A stainless steel compound almost did the job but a follow up with a white rouge compound left a finish that looked chrome plated, just as new.
Buffing is quite demanding compared to grinding. Most often grinding using these sized wheels is focused on small parts where the intent is to use a hard wheel to sharpen or lightly remove rust. All cases whereby a light touch is needed to avoid overheating the part. Buffing (or polishing) is the exact opposite. You are attempting to use a soft wheel charged with compound to remove metal on what can be large parts. To do so with any speed requires muscle as you push the part against the wheel until it nearly stops. This process causes the motor to heat up substantially. As such this small horsepower 6" grinder was truly challenged yet performed admirably. Not once did any over current or overheat devices kick in. I used it continually for periods of an hour or more without complaint. At this point the tool has done all that is required and essentially paid for itself.
For those that have experienced vibration I charge that to defective wheels. My tool at delivery must have gotten the A+ wheels as it vibrated little nor made much noise. I fully expect that it will serve admirably as tool grinder (professional tool grinding wheels are often less than 6" in diameter) however my dilemma is where to put it when bench space is at a premium and no floor space can be singularly dedicated to tool such as this. What I am soon to try is using a device meant to store heavy mixers under the counter similar to
http://www.amazon.com/Rev-A-Shelf-RAS-ML-HDCR-Heavy-Duty-Mixer-Lift/dp/B001DSY0P4
or
http://www.amazon.com/Rockler-Under-Drawer-Swing-Up-Appliance-Mechanism/dp/B001DT4U80/ref=sr_1_2?ie=UTF8&s=hi&qid=1297351813&sr=1-2
They are designed for heavy mixers similar to the weight of this tool plus they put the grinder out in front of the bench which gives it needed access when using the buffing wheels. Serious buffing machines are most often located on pedestal mounts with long arbors mounted with big wheels and no guards or rests at all. This is done so that the user can manipulate the part as needed to contact the buffing wheel at the right angle. In my first use I set it on the bench and rotated the tool to gain needed access to the part. Lastly, the manual came with a full exploded parts drawing and a complete parts list. I expect that Delta will be much more likely to have parts should they be needed 5 years from now than most of the off brand tools similarly priced plus the tool will be worth much more at resell than these same tools.
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