SainSmart Genmitsu 10Pcs Nano Blue Coat Engraving Bits, 20 Degree 0.1mm Tip 1/8" Shank Conical V-Bit

Well made, allowed me to try free hand sign routing. Good for outlining design when routing.

I've used these on pine, mahogany, brass and slate. With careful attention to feeds, depths and speeds, I've had excellent results every time. Hobbyist CNC with a Genmitsu 4040 Pro MAX and Inventables Easel.

Ok quality for the money, I use them for engraving anodised aluminium, but you must use a coolant as cheap grade metals stick to the cutter and break the tips, I used a paste and it works a treat but I also tried heavy oil which worked great too but a bit more messy I only did 0.2mm depth for the engraving and used 500mm/m feed and 200mm/m plunge

Perfect for the genmitsu 3018 I have. Done a few scarves with them. Make a nice clean cut as long as you go slow (since they're a single flute design)

The headline description of these says 'carbide' but I see in the description that they're made of alloy steel. This fits with my experience of trying to use them for metal engraving (aluminium) - They aren't very sharp and haven't got a good enough edge to cut metal. Probably OK for wood & plastic. Would not buy again.

I've milled several PCBs without breaking one and it's still sharp. I find the 30deg angle better than the 20deg as it gives that little bit extra width to the cut. I didn't have much success with cheap 20deg ones.

I bought these bits for engraving acrylic , and they worked extremely well.

Ok quality, but very different lenght and shape. Bit converning for a milling tool. Will buy different next time.

Tout semble correct, je n'ai pas encore eu le temps d'essayer les pointes à graver.

Gute Qulität. Passt wie beschrieben.

Ottima qualità. Solo per finiture. L'angolo a 30° è condizionante.

Precies zoals verwacht

Overall I'm impressed with these bits. The value far exceeds by expectations. Based on some other reviews, I was expecting sub-par performance from these bits. However, after 3 jobs I see great results and will continue using them. 10 bits at this price is a tremendous value. Update: After some additional time with these bits, I've noticed that they have an issue with clearing chips while cutting hardwood in particular. When cutting a 5mm deep v-channel in maple, the resulting channel is hard packed with dust/chips. Adding an additional finishing pass helps marginally, but there is still lots of manual work to clean out all the chips from the cut. I still recommend these bits since they are great for the price, but know that more cleanup work than expected may be needed when cutting some materials.