Features:

  • Range of processing ---- for carving/cutting/engraving/milling/slotting/sculpturing in materials like MDF, ABS, PVC, acrylic, nylon, resin, plastics, density board, wood, plywood, hardwood etc. Ideal for three-dimensional sculpture, surface machining, 3D relief sculpturing etc.
  • Dimensions ---- shank diameter (SD): 1/8" (3.175mm); cutting edge diameter (CED): 1/8" (3.175mm); cutting edge length (CEL)/flute length: 17mm; overall length (OAL): 38.5mm
  • High efficiency ---- these bits own sharp edge which is able for fast engraving that makes high efficiency; durable, high precision and not easy to break; it is smokeless and burr-free while processing
  • Perfect cutting ---- the design of 2 flutes, larger spiral chip space of CNC Router Bit makes non-stick crumbs, smooth cutting and fast chip-removal
  • Package contents ---- 10pcs 2-fluted solid carbide spiral upcut bits assorted in storage case
Waaaay better bits for a CNC machine than the standard RotoZip bits I've been using.

So I built a very cheap and loose CNC machine using a RotoZip as a router. I was originally very disappointed with its performance. After swapping the spiral cutting bit made for the RotoZip with one of these HQMaster router bits, I feel much, much better. The old RZ cutting bit could not run properly even at 100 mm/min with a layer depth of just half a millimeter. My CNC uses small NEMA 17 86 oz/in motors with 5/16 18 tpi threaded rod for the axes (yes, cheap build). It was hard for the motors to push the bit even at this slow speed and very low cutting depth and it skipped lots of steps. When I tried this HQMaster bit I got it to go at 300 mm/min with a layer depth of 2 mm and it was like going through butter (in 19 mm pine board), without the X/Y motors skipping. It can probably do even better (faster and larger layer depth) but that's as far as I've pushed it this evening. Still, it's way, way ahead of the normal RotoZip cutting bit. Additionally, when it cuts, it barely makes any more sound than the router normally makes spinning freely, the old RZ bit was very loud when it was (barely) cutting. I even had an accidental command move this HQ bit cutting at a depth of about 10 mm through the pine, and though the motors were skipping at 300 mm/min, it still went through the wood a few centimeters before I could eStop the machine. Getting 10 bits at this price is amazing because the normal (and much less capable) RotoZip bits are around $8 at Home Depot. The only advantage with the standard RZ bits is that they are much longer, I can get about 20 mm of total cutting depth with these HQ bits, which is enough for my purposes. Now, my cheapo CNC can actually be used to make better parts for itself. I'm very glad I made this purchase, these bits make all the difference in the world for my CNC.

Comparing to ROTOZIP bits

Just to give a visual comparison... My first use of each of the two worked about the same but I haven't used the HQMasters long enough to judge them long term. Initial cuts using 1/2 inch standard plywood were fairly clean. If you are using thicker material these may not be for you but for my small projects they should be ok.

I am pleased with the performance of these router bits

I used these router bits while making a slot car track. They held up well while cutting slots in MDF. Motor speed and travel speed will determine how long each bit maintains it's ability to make a clean cut and how long the bit will last. I am pleased with the performance of these router bits.

Good seller, item as described

Good seller, item as described. I do a lot of inlay work so I go through a lot of bits. The price for these is good, and they're perfectly acceptable quality.

Very nice bits.

I bought these to cut patterns out of cypress using a CNC Router Table and have been pleasantly surprised with the results. The stock being 7/8" thick, I ordered these as well as a set of 1-1/4" long straight bits from another supplier. After several attempts at making 1/8" deep cuts per pass, I had broken all the straight bits. I started using these 1/8" spiral bits, leaving 1 inch out of the collet to allow me to cut the full depth of the cypress. MUCH better results. I have managed to push these to 3/16" per pass at a feed rate of 30 IPM at 21,000 rpm. I have yet to break one, except for those times I forgot to turn the router on before starting the cut. If you're looking for a 1/8" bit, you can try the others, but make sure you pick these up too. For the price, you can't go wrong. I will reorder.

Don't expect tight manufacturing tolerances (even at a glance, ...

Don't expect tight manufacturing tolerances (even at a glance, the bits in the case are all different lengths for instance), but these bits are so inexpensive as to be essentially disposable. I'm still using the very first one after cutting a bunch of things out of MDF and some oak on my CNC router, all without incident, so these bits have more than lived up to my expectations.

A must-have for all small CNC owners!

These should be in the bit box of everyone who has a small CNC. At $1.5 each, they are a great value. I primarily use them for cleaning up after v-carving, but have also used them for drilling. I've broken 3 thus far, all in rather tough duty, e.g., me trying to push the feed rate just a little bit higher :) I'll be back for more.

Purchased Upcut Mill for Tabletop CNC Mill

Have not used yet, so longevity is unknown. Bought for wood draft cuts and soft aluminum. Delivery was prompt and product looks to be consistent in manufacture and edges are sharp. If they don't cut, I will revise my review.

I've purchased twice, will buy more

I've purchased these twice (and will buy more). They are great for both wood and u Aluminum. I run the crap out of them on wood...and when I'm done, I pop them on my Dremel for plastic stuff. Like any other tool, get your feeds and speeds right and they'll last quite a bit. I won't say they're 100% perfect, but for the price they're well worth it.... BTW, the little case, very convenient

Low price and great performance

Excellent bits for the money. I use them on my 1/8" rotary tool and they cut effortlessly. I used one for a plywood project and used it to cut slots as well as boring holes for screws. I was using the bit in a flex shaft attachment and it worked with not problems. I found it SIGNIFICANTLY faster than using a drill while creating holes. Just be sure to hold on tight! The is some kick back interspersed with the near effortless cutting, so be careful since your cuts with a rotary tool flex shaft are totally freehand. It doesn't like being at an angle, always try to go for 90 degrees to the work.

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