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Dremel 9901 Tungsten Carbide Cutter

by Dremel
4.3 out of 5 stars 67 customer reviews
| 3 answered questions
List Price: $10.87
Price: $8.15 & FREE Shipping on orders over $49. Details
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Full Size
  • Enter your model number above to make sure this fits.
  • Tungsten carbide
  • Shapes, smoothes, removes hard material
  • Do not run in excess of 30,000 RPM
› See more product details
153 new from $6.31 1 used from $5.75
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$8.15 & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Dremel 9901 Tungsten Carbide Cutter
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  • Dremel 561 Multipurpose Cutting Bit
Total price: $17.02
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Product Information

Size:Full Size

Technical Details

Part Number 9901
Item Weight 0.3 ounces
Product Dimensions 1.6 x 0.8 x 0.2 inches
Origin USA
Item model number 9901
Size Full Size
Color Silver
Material Carbide
Item Package Quantity 1
Batteries Included? No
Batteries Required? No
Warranty Description No
National Stock Number 3455-01-308-4389

Technical Specification

User Guide [pdf ]

Additional Information

ASIN B00004UDJJ
Customer Reviews
4.3 out of 5 stars 67 customer reviews

4.3 out of 5 stars
Best Sellers Rank #15,888 in Home Improvements (See top 100)
#3 in Home Improvement > Power & Hand Tools > Power Tool Parts & Accessories > Power Finishing Tool Parts & Accessories > Power Grinder Parts & Accessories > Wire Wheels & Brushes > Spiral Power Brushes
#73 in Home Improvement > Power & Hand Tools > Power Tool Parts & Accessories > Power Rotary Tool Parts & Accessories
Shipping Weight 0.3 ounces (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First Available March 27, 2003

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Customer Reviews

Top Customer Reviews

2.0 out of 5 starsBad knockoffs
By MT Vessel on August 29, 2012
Size: Full Size Verified Purchase
Whatever these are, they are NOT Dremel 9901s. They mic out at 3/32" at the cutting head, whereas 9901s are 1/8" from shaft to head. Additionally, 1 of the 3 I ordered has burn marks on the metal, indicating it may have lost its temper. Finally, they do not arrive in Dremel packaging. They come in a plastic baggie with a sticky label on it.

If you are surface scrolling, these might work fine for you. If you are slotting, you will NOT achieve the size slot you need with these!
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1.0 out of 5 starsNot genuine Dremel bits
By Buzz on July 21, 2012
Size: Full Size Verified Purchase
I have Dremel 9901 cutters, and they come in sealed, super light-weight, blister packed Dremel packaging when you buy them anywhere on the planet. The cutting surfaces on the genuine bits are .122 inches in diameter.

I ordered a Dremel 9901 tungsten carbide cutter (advertised as "Dremel 9901 Tungsten Carbide Cutter by Dremel"). I received two loose bits in an envelope (no Dremel packaging), and one's cutting surface ranged from .095 to .096 inches in diameter while the other ranged from .088 to .091 inches in diameter. I also have no idea what these cutters are made out of since they aren't in manufacturer's packaging.

I contacted the seller and received this response: "It appears that you were shipped the wrong items by mistake. In order to correct this there are two options: would you prefer to receive the correct ones or receive a full refund (including shipping). If you choose to receive a refund, please provide your Pay-pal account and a transfer will be made. You may do as you see fit with the original items you received but do not send them back."

I told the seller that I wanted what I ordered, and he again sent me two loose bits. While the cutting surfaces on these bits are closer in size to the genuine bits, they're still off (one's .124 inches in diameter and the other's .120 inches in diameter). More importantly, no Dremel packaging. Again.

These are not genuine Dremel bits; they are most likely imitation bits purchased in bulk and shipped in pairs so customers think they're getting a deal. The reviews confirm this since real tungsten carbide bits don't perform so poorly or break so easily. Real tungsten carbide is also expensive, so why would you get two when you order one?
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1.0 out of 5 starsBreaks Easily
By Don LaBonte on August 20, 2011
Size: Full Size Verified Purchase
I got this to cut through 12 gauge steel. It only made a dent in the steel before it broke. It also "chattered" which is probably due to the coarse cutting grooves. I switched to a cheap diamond cutter and although it was slow, it did the job.
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5.0 out of 5 starsWill cut through anything!
By David Shamma on November 7, 2010
Size: Full Size
Really, will cut through just about anything. I've had this bit for 15 years - still sharp and straight. But use care...its not a drill; this is only for lateral cuts.
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1.0 out of 5 starsNot for hard or thick metals at all
By thomasterrible on June 11, 2011
Size: Full Size
I got this bit to cut/route some simple shapes for a bracket from a piece of 18 gauge sheet metal. It says it will cut through hardened steel etc. but it is not good for that at all. It will only be effective with very thin or soft metals. If it has such a difficult time with plain sheet metal I can't see how it could work at all for hardened steel. It will NOT work with a drill press as one reviewer suggests as it has no point and is not made to plunge. It needs to cut from an edge or through a drilled hole. Also it is a 1/8 shank so it did not fit my new trio model though I expect there may be an adapter available my local store did not carry one. It would probably be OK cutting through thin or soft metal. In comparison an EZ 406 cutoff wheel was not great but several times better at cutting the same metal than this bit. I am actually changing the material to some .063 inch 6061 aluminum to see if either of my dremel tools will cut well enough with the softer metal. So just don't expect this to cut through any hard or thick metal, it is for light duty only.
4 Comments 21 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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3.0 out of 5 starsCan only be used at lower speeds
By M. Ryan on February 18, 2012
Size: Full Size Verified Purchase
If you have a high speed application, skip buying this, the bits snap on impact. Just use a metal cutting bit.
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4.0 out of 5 starsGood sharp cutter for mild steel but very brittle
By Benny on March 16, 2014
Size: Full Size Verified Purchase
I bought this cutter to make a square hole in a metal stud - the type of metal studs used to hold up drywall in high-rise apartments/offices. The cutter worked great, it moved through the metal stud no problem. I did however have 2 problems that I'm writing this review so that others can benefit from my experience:

1.) The cutter is relatively short. I was trying to cut metal that was behind some drywall. So the cutter had to be long enough to get through the drywall and through the metal. Because of an obstruction on the wall surface, I had to hold the tool about 1.25" away from the metal. This made it so that only the very tip of the cutter would contact the metal. While it worked I can comment that the tool is very short, so consider you application before buying.

2.) The cutter is very brittle. I actually cracked the shaft of this tool and could not complete my job. Because of my particular use, the cutter was bouncing around a bit in the slot I was cutting. This caused the bit to break. After it broke, i used the remaining portion to try to cut again. It broke a second time.

Final recommendations: This cutter is good for controlled cuts in mild metals where you can brace/secure the work and the tool. This tool is not very good for free-hand cutting as I was doing. Make sure that you control the tool well to prevent bouncing and cracking of the bit. I think I will re-try with a thicker-shanked bit. Perhaps 3/8" if I can find one.
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