SpeTool Down Cut Spiral Router Bit 1/16 inch Cutting Diameter with 1/4 inch Shank End Mill for Woodwork CNC Machine Tools

I was happy to find a bit this size, and knew to be gentle with it. It didnt matter. It broke off the first time I used it, and I made sure to use soft wood and not go more that 1/16 depth the first cut.

I have used this to make many signs in pine and fir. It works perfectlly when using oramask as it doesnt leave frizzies or lift the oramask. I am very happy with the sharpness and longevity of this bit.

Bought this to use on softer woods lile cedar and thin ⅛ birch plywood. Cuts very well and clean and has a half inch long cutting depth. I messed up and snapped it on some quarter inch birch though, I think it may have gotten gummed up with two sided tape holding my project down. I will order another one however because this bit was great.

I recently discovered the SpeTool Spiral End Mills and I must say I am extremely impressed with their quality. I have purchased several of these end mills and have been consistently happy with each and every one. I use them in my CNC machine and they have held up well even after multiple uses. The spiraled design provides a smooth and efficient cut, making my machining tasks much easier. Additionally, the end mills are very affordable, making them a great value for their performance. I appreciate that I can purchase a durable, high-quality end mill without breaking the bank. Overall, I highly recommend the SpeTool Spiral End Mills to anyone in need of a reliable and affordable cutting solution for their CNC machining projects.

Use the SpeTools feeds and speeds chart for the right cut. Due to how small it is, this bit is delicate. This will cut some very nice details.

Wouldn’t recommend, product snapped within first use of it. Have settings on my CNC to have the machine cut 1/16 of an inch each pass and when it got half way through a 7/32” thick cut through; it snapped. The snapped end looked very granular too so doesn’t seem to be made from a good quality mix of metals, or not annealed properly.

It started off doing well and I thought it was going to be a winner, but about 3/4 the way through the project it snapped. And yes I had the plunge rate and feed rate set accordingly.

If you do a lot of intricate CNC engraving you will find this to be an often needed and invaluable tool. They are difficult to find, very fragile, and quite expensive considering the lack of durability. I try to use a 1/4 or 1/8 tool for clearing and only use this tool for cleaning up the detail edges. Even then, make sure you are taking VERY shallow cuts, and slow your feed rate down to like 30 per minute. Even having taken all those precautions if your cut takes you through a knot, or you are using particularly hard material like hickory, you will snap these off occasionally. If you are doing custom client jobs, make sure you keep more that one of these on hand and tread very gingerly with them. If you are just doing fine engraving and dont need the straight bit, the 1/16th tapered ball nose is far more durable, and might be a better choice for some jobs. Even for inlays I usually use the tapered bit. You just have to experiment a bit because youll have to make your pockets a little undersize to compensate for the taper. Once you get it down, it a much better way to go for inlays. The taper actually gives you tighter inlays and less gaps. When you do need the straight edges AND tight corners (epoxy fills, for example) this tool is invaluable. I have bought several of these in spite of the breakage, and will continue to buy them.

I used this bit to cut into 3/16 thick mahogany veneer for maple inlays. The down-cut spiral bit made nice clean cuts. I havent used it enough to rate its durability or longevity, but carbide bits typically hold up well.

love the material and excellent customer service! these are great! and for a good price! I use them a lot for my small cnc projects, my personal fav is the compressions bits! wow! there amazing and strong!