DELTA GR450 ShopMaster 8-Inch Grinder

by DELTA

Product Description

Amazon.com Product Description

The DELTA GR450 ShopMaster Eight inch Grinder is a variable-speed grinder with a patent-pending quick change/tool-less wheel changing system. The powerful five Amp, 60 Hz single phase motor features variable speed capabilities of between 1,725 and 3,450 RPM. This versatile grinder not only takes care of the toughest grinding jobs, but it also handles buffing and sharpening duties with ease. Its cast-iron construction ensures minimal vibration while operating, and the built-in eye shields and spark deflectors ensure safe operation each and every time. DELTA also includes a gooseneck lamp to help get a clear view of the workpiece and grinding wheels.

From the Manufacturer

DELTA GR450 ShopMaster 8D Grinder

Product Details

• Product Dimensions: 19.4 x 15.2 x 13.6 inches ; 48 pounds
• Shipping Weight: 49.6 pounds
• Shipping: This item is also available for shipping to select countries outside the U.S.
• Shipping Advisory: This item must be shipped separately from other items in your order. Additional shipping charges will not apply.
• ASIN: B0000B3AQQ
• California residents: Click here for Proposition 65 warning.
• Item model number: GR450
• Average Customer Review: 2.8 out of 5 stars  See all reviews (37 customer reviews)
• Amazon Best Sellers Rank: #97,137 in Home Improvement (See Top 100 in Home Improvement)
  • #40 in Home Improvement > Power & Hand Tools > Power Tools > Grinders > Bench Grinders

Customer Reviews

Most Helpful Customer Reviews

21 of 22 people found the following review helpful:

4.0 out of 5 stars Nice grinder, July 20, 2004

By 

T. Butler "tjb" (Houston, Texas USA) - See all my reviews
(REAL NAME)   

This review is from: DELTA GR450 ShopMaster 8-Inch Grinder (Tools & Home Improvement)

I've had this for about a year and it works pretty well for my hobbyist application. I wish it had a little more power when using the steel brush. I really like the variable speed when sharpening tools for wood turning. It helps prevent heat build up. The quick change feature and light are very useful also.

20 of 21 people found the following review helpful:

4.0 out of 5 stars Excellent tool for the money, July 25, 2006

By 

D. E. MCIVOR "puma35" (Carson City, NV) - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: DELTA GR450 ShopMaster 8-Inch Grinder (Tools & Home Improvement)

I recently added the GR450 to my shop and it has seen a lot of use. I didn't realize how badly I needed the grinder until I got it in the shop! I do a lot of turning and use the grinder many times during any given turning session. I've also used it to touch up our kitchen knives and to make a striking knife.

The unit comes with a 36 grit and 60 grit wheel. The 36 grit is for serious reshaping and probably won't see that much use in my shop (though I did use it for the striking knife). I bought a 100 grit Norton wheel and now have the unit set up with the 60/100 wheels, which is a useful combination. The quick change feature on the wheels makes change-outs a breeze.

My only complaint (and the reason for 4 and not 5 stars) is the wheels themselves. The 60 grit wheel that came with the unit was 2/32 - 3/32 out of true, causing the unit to vibrate unsatisfactorily. To Delta's credit, they immediatly sent me a replacement wheel when I called the customer service line. Even the Norton wheel I bought seems slightly out of true. Grinding wheels are cast, and apparently the quality control division industry-wide hasn't figured out how to keep them perfectly flat.

The GR450 comes with two holes in the base for fastening the unit to a bench top or grinder stand. I haven't done this yet, and I don't think it's essential, but I do think it would maximize the unit's performance.

One other comment. The tool rests fasten to the unit with conventional bolts, and the unit comes with a small wrench for these bolts that stores on the unit. Delta calls this a "quick adjust" feature. With three bolts on each tool rest, "quick" is not the term I'd use. At some point I'll probably pick up some wing knobs and change out the bolts for a tool-less change feature.

May 2009 UPDATE
After a couple of years (where does the time go?) using this grinder, I thought I'd add a couple of comments.

I have since built a stand for the grinder and did bolt the unit to the top of that (wood) stand. This didn't do much to reduce vibration, so I purchased a wheel balancing kit from Oneway. This kit definitely helped smooth out the vibrations, but certainly didn't eliminate them. I also have done away with the stock tool rests in favor of some after market products. The rests that come with these units are really the least that the manufacturers (not just Delta) can get away with--functional, but barely.

I'm still very happy with the grinder, still getting lots of use out of it.

14 of 16 people found the following review helpful:

1.0 out of 5 stars Quality Concern, October 1, 2007

By 

Rossiman (Arizona) - See all my reviews

This review is from: DELTA GR450 ShopMaster 8-Inch Grinder (Tools & Home Improvement)

The packaging was good as the box was unpacked. From there, it progressively got worse. The brackets to hold the clear shields on do not offer adequate fit. The bracket to hold the tool rest is finished for a left hand application. Once again fit & finish is not a concern at Delta. When I turned the machine on, It almost vibrated off the bench. I turned the variable speed up to see if it would make a difference and in doing so, it stayed on full throttle. The knob is totally inoperable and does nothing. The Wheels could not be trued using the supplied stone dresser. Looks like they will have to be replaced with better quality. Delta support line is closed tonight. Hopefully they will support this mess of a machine!!