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General Tools 55 Heavy Duty Circle Cutter. Adjustable 1-3/4 Inch to 7-7/8 Inch

4.2 out of 5 stars 173 customer reviews
| 29 answered questions

List Price: $32.19
Price: $24.69 & FREE Shipping on orders over $49. Details
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7-7/8" Heavy Duty
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  • Designed for professional use, the Heavy Duty Circle Cutter will make clean cuts from 1-3/4 to 7-7/8 inch diameter
  • The tempered steel body features marked graduations on the beam for fast measurement and application
  • #55 Heavy Duty Circle cutter is designed with a 1/2 shank for drill press use only; Maximum safe speed is 500 RPM
  • This round shank circle cutter is great for making smooth cuts through most materials, including wood, composite, sheet metal and more; Shank is 1/2 inch round
  • All adjusments are made with a hex wrench which is included; Replacement blade is General Tools Model # 55 Blade, replacement drill is General Tools Model # 5/6/55 Drill
29 new from $15.00 2 used from $20.99

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$24.69 & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • General Tools 55 Heavy Duty Circle Cutter. Adjustable 1-3/4 Inch to 7-7/8 Inch
  • +
  • Replacement 1/4" Cutting Blade
Total price: $35.68
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Product Description

Style: 7-7/8" Heavy Duty

Product Description

Designed for professional use, the Heavy Duty Circle Cutter will make clean cuts from 1-3/4 to 7-7/8 inch diameter. The tempered steel body features marked graduations on the beam for fast measurement and application. #55 Heavy Duty Circle cutter is designed with a 1/2 shank for drill press use only; Maximum safe speed is 500 RPM. This round shank circle cutter is great for making smooth cuts through most materials, including wood, composite, sheet metal and more; Shank is 1/2 inch round. All adjusments are made with a hex wrench which is included; Replacement blade is General Tools Model # 55 Blade, replacement drill is General Tools Model # 5/6/55 Drill.

From the Manufacturer

Works like an adjustable hole saw. This heavy-duty circle cutter most preferred by professionals. 1/2 round shank for drill press use. Replaceable 1/4" high-speed tool steel bit and replaceable 1/4" pilot drill. Capacity 1-3/4" to 7-7/8".

Product Information

Style:7-7/8" Heavy Duty

Technical Details

Part Number 55
Item Weight 11.8 ounces
Product Dimensions 5.5 x 4 x 1 inches
California residents Click here for Proposition 65 warning
Item model number 55
Size 7-7/8" Heavy Duty
Style 7-7/8" Heavy Duty
Power Source corded-electric
Item Package Quantity 1
Number Of Pieces 1
Measurement System Inch
Batteries Included? No
Batteries Required? No

Additional Information

ASIN B00004T7P1
Customer Reviews
4.2 out of 5 stars 173 customer reviews

4.2 out of 5 stars
Best Sellers Rank #21,112 in Home Improvements (See top 100)
#3 in Industrial & Scientific > Cutting Tools > Industrial Drill Bits > Wood Drill Bit Sets
Shipping Weight 15.2 ounces (View shipping rates and policies)
Date First Available February 4, 2004

Warranty & Support

Warranty, Parts:Parts
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Style Name: 7-7/8" Heavy Duty Verified Purchase
PRODUCT REVIEW:
I used this to cut plastic rings (7 1/2" outside diameter, 6" inside diameter) out of 3/4" thick, heavy kitchen cutting boards to be used as surrounds for marine speakers. This required two cuts which sounds easy but I wish I had this advice in retrospect. Before I begin with the advice, let me say this circle cutter is EXCELLENT! It's HEAVY DUTY, SHARP, but does make an ungodly whirlwind of shavings from whatever your cutting so lay a big plastic tarp down before you start your first cut and be sure to limit your drill press to no more than 500 RPM. Now the cutting advice.

IMPORTANT CUTTING TIPS:
First, consider the width of the blade. When you're cutting OUTSIDE a circle-shaped line be sure to ADD the blade width to the width of this cutter. When you're cutting INSIDE a circle-shaped line, be sure to SUBTRACT the width of the blade from the circle you want to cut. If you forget this or do this backwards then your circle will be 1/4" larger (or smaller) than you intended.

Second, select your cutting method and consider carefully whether your cutting RINGS or CIRCLES. You'll be able to cut a perfect RING with this tool but if you're cutting CIRCLES you'll have to choose between having small holes in the middle of your work product or a slight lip on the outside edge of your circle.

WHY DO I NEED TO CHOOSE - I JUST WANT TO CUT A SIMPLE CIRCLE?!
The reason you cannot have a perfect circle cut is because it's impossible to secure both the INSIDE and the OUTSIDE of a circle at the same time using this type of tool and a drill press.
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Style Name: 7-7/8" Heavy Duty Verified Purchase
Update (November 10, 2011):

It has been 9 months since I purchased this item and it just now started smoking and burning (I've cut about 20 large holes in walnut, maple and pine) - so I'm sure the problem is that the blade is getting dull. Not a problem with the product, just a problem with the user not keeping it sharp. I stick to my original review, for the price, this is a good product.

Original review:

I needed to cut several circular holes in a weather station project - read all the reviews and decided, for the price, that I would give this Circle Cutter a try. Here is the good and the not so good:

Pro:
1. Right Price.
2. Quick Delivery.
3. Well made (sturdy), should last for years and years (may have to sharpen).
4. Holes were perfectly circular, smooth and easily cut through 3/4" walnut veneered plywood - no chipping at all.
5. Easy to adjust.

Con:
1. No instructions to speak of - didn't even mention what speed to run my drill press. Had I not noticed, in the Amazon description, that max speed was 500 RPM, I might have let it run a bit faster. As it was, I did notice the limitation and set up my drill press to run at 450 RPM - cut smoothly with no burning.
2. The scale is inaccurate - you will have to use a ruler/tape measure to adjust the size (diameter) you want to cut.

All in all, for the price, this is a great product and I'm pleased with my purchase. I would have given it 5 stars but for the inaccurate scale - this is something that should have been right.

Note: I read the other reviews and noted at least one that mentioned burning - I'll bet this was because he didn't note the 500 RPM limitation. I had zero burning.
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Style Name: 6" Professional Verified Purchase
I have both the 5b and the larger 55 model. Both do well in a drill press, though they tend to create serious vibration as they are by nature always out of balance. I purchased these through Amazon.com and returned to look for some cutting blade packs, as mine are getting dull after cutting several sheets of thin aluminum plate for camping cookware lids - the cutting tip gets VERY hot because of the large circumference of travel. I noticed that a single replacement blade is essentially the same cost ($10) as a whole new cutter, which is ridiculous!

REPLACEMENT BLADES SHOULD BE SOLD IN PACKS OF 5 or 10, they should also be tungsten carbide to last longer at high temperature.

In use, try to have the cutting tip as high as possible so that the pilot bit doesn't enlarge the pilot hole, and if AT ALL possible clamp down the material you are cutting - the blades tend to seize into the material just before the cut is complete and the whirling material could cut your hand, or damage the disk or hole. You can also try cutting half way through from each side. Use eye protection as these tools throw cuttings everywhere.

Hint: If you are cutting out a disk, instead of a hole, and you want to clean up the rough edge, mount the disk inside a 1/4" bolt, fender washers, and some 1" squares of thick rubber sheet (I used spare mud flap material) to make a disk-holder 'sandwich' like this: bolt-washer-rubber-DISK-rubber-washer-nut-locknut-nut. The rubber grips the disk so that it rarely spins loose. You can chuck the 1/4" bolt into your drill press (as a poor-man's lathe) and use a file and sandpaper or abrasive screen to round off and de-bur the edges. If the pilot hole gets too enlarged try a 5/16" bolt, or drill it out to use a 5/16" bolt.
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