The LongMill MK2 is a powerful and affordable hobby CNC router perfect for any workshop. Scale it to your needs by choosing from one of its three flavors: 12×30, 30×30, and 48×30.
The machine name roughly corresponds to its cutting area in inches and each machine has 125mm (~4.9″) of Z-axis travel.
Not sure what you need to order for your LongMill? Check out the Beginners Kit.
Turn your ideas into a reality with the LongMill Benchtop CNC MK2
The LongMill helps you take your woodworking and fabrication to the next level. Its range of workable materials includes any species of wood, a variety of plastics, soft metals like aluminum and brass, and a variety of machinable foams and waxes for model making or metal casting.
We designed the LongMill to be the best hobby CNC router in its class, offering rigidity, and reliability. With large extruded aluminum rails, fully supported Y-axes, 1/4″ steel gantries on all axes, high power NEMA 23 motors, and high precision MG-12 type linear guides on the Z-axis, the LongMill MK2 is the most powerful CNC router in its class at its price point.
This kit comes with:
All rails, gantries, fasteners, lead screws, and other hardware parts to make a complete LongMill
All electronics, including power supply, controller, drivers, and motors
Assembly instructions and resources
Excellent lifetime technical support during the life of your ownership
Tools and supplies needed for assembly (not included in the kit) are
3/4″ MDF sheet to act as a working surface
An electric drill or screwdriver
A laptop or computer
A router and end mills (for purchase separate on our store)
For routers, we recommend the Makita RT0700/RT0701. It’s reliable, powerful, speed-adjustable to a large range (10-30K RPM), and its uniform outer body allows for versatile z-axis mounting. We’ve been using the Makita on our CNC machines for years. The LongMill MK2 comes free as standard with a 65mm router mount, which is compatible with the Makita RT0700/RT0701 and most variations of this router design. If you wish to use a different size router or spindle, please check out the other sizes that we offer.
*Routers that we supply will be 110V only (North America). If you live in a country that uses a different voltage, please purchase a router in your region.
The LongMill comes with free software and is compatible with dozens of other paid and free software. Try our Toolchain Wizard to get a quick recommendation for software that may work best for you.
Additional information
Weight
60 lbs
Dimensions
8 × 10 × 41 in
Size
For dimensioned drawings all of the machines, please download our PDF document. If you’d like to see some tables that our community members have built for their own machines, we’ve got a page on it here: Community Table Builds. If you’re looking to properly size a space to put your machine or are making a dedicated table, ensure that you leave enough room for the LongMills control box and any other peripherals that you might be using like a laptop, monitor, keyboard, etc. The control box is roughly 150mm x 280mm, has holes so that it can be easily screwed or mounted to any surface, and has a USB port on its left side which allows you to connect your computer to control the machine.
Add-ons
You can include add-ons to improve the functionality of the LongMill. These are all optional. For additional add-ons, please see our Add-On section of our store.
We recommend using the Makita RT0700/RT0701 router 110V with your LongMill. This router comes with speed control from 10,000 to 30,000RPM and has 1.25HP of power. This router is compatible with 1/4″ shank tooling and can be adapted to 1/8″ shank tooling using a 1/4″ to 1/8″ collet adapter.
Our Z-axis independent, magnetic dust shoe allows you to attach standard vacuum hoses to your CNC machine, allowing it to suck up dust as it’s cutting, making clean up easier and keeping dust out of the air.
This dust shoe is adjustable in the Z direction, and the front bristles and vacuum hose can be easily detached to make it easy to change bits.
Our 3-axis touch plate allows you to set the ‘origin’ or starting point of your cutting tool very accurately based off the surface of the material you’re going to be cutting.
Place the touch plate onto the corner of the material to locate the cutting bit in both X, Y, and Z-directions to start your cutting job, or use it to set the Z-height of the tool to accomplish tool changes on more complicated projects.
Prevent dust and debris from getting into your Y-axis lead screws with our dust shields designed for the LongMill MK2. Each pair of dust shields are made from formed sheet metal which are easily installed between the front and back feet of your machine using M5 hardware. Please note that the ACME lead screws and Delrin Anti-backlash nuts used on the LongMill are designed to work in dusty conditions and the dust covers are not required for general use. Please note that this dust shield only fits the LongMill MK2 30×30.
Inductive sensors allow users to add homing and limit switch functionality to their machines. We only recommend this kit to advanced users
FAQ
What materials can it cut?
The LongMill is primarily designed for cutting wood but is capable of cutting foam, plastic, and soft metals such as aluminum and brass.
Where can I buy end mills and other tooling?
End mills and bits are available on sale on our website as well as online such as Amazon and Ebay, or at your local hardware store such as Home Depot or Lee Valley.
What software can you use with the LongMill?
The LongMill is compatible with dozens of free and paid CAM software. The LongMill is compatible with standard G-code. You can check out our resources page at www.sienci.com/resources and look under the software tab. We’ll be hosting webinars and creating additional resource videos to help you learn to design and program your CNC machine.
What system requirements are there?
You can run your machine off virtually any modern laptop made in the last 5 years running Windows, Mac OS, and Linux.
We’ve tested our machine with Intel Celeron and AMD Phenom processors with less than 2GB of RAM with no issues (although it is a bit slow).
For any other downloadable CAD or CAM programs that don’t run on the cloud, please check with the software creator for minimum system requirements.
What spindles or routers can I use?
While we recommend the Makita RT0701/RT0700, you can also use other trim/palm style routers. You will be able to let us know what tool you want to use and we will send you the appropriate mount.
Will there be 4th or 5th axis support?
In the immediate future, there will not be 4th or 5th axis support for the LongMill.
If you would like to implement an additional axis to your machine, we encourage users to try creating their own and sharing it with the community!
Warranty
The LongMill has a 90 day warranty once it arrives at your door.
We want you to have a great experience with your machine, so if any parts are found to be missing or damaged, please email us. We will ensure that you receive the support you need to restore your LongMill to operating condition or provide a full or partial refund.
You may cancel an order if it has not shipped yet, please contact us if you wish to do so. We do not offer returns for LongMills that have already shipped.
General Warranty and Limits of Service:
Effective March 4, 2019
Throughout this policy the words “we”, “us” and “our”, or “Sienci Labs” will be used to refer to Sienci Labs Inc. herein and “LongMill” or “machine” will refer to Sienci Labs’ Sienci LongMill 12×12, Sienci LongMill 12×30 and Sienci LongMill 30×30. Additionally, the words “you”, “your”, “user”, and “operator” will refer to the original purchaser/customer, user, or viewer of any of the products or media provided by or through Sienci Labs.
Sienci Labs Inc. (the “Company”) grants the LongMill (the “Product”) a standard warranty within Canada and the US to the original customer to be free from missing parts, defects in material, and defects in workmanship for a period of ninety (90) days from the date of receipt by the original purchaser. Sienci Labs Inc. will ensure that the appropriate support is provided to the original customer to restore the LongMill to operational condition or provide a full or partial refund under the sole discretion of the Company.
This warranty does not cover damage due to improper use or assembly, lack of maintenance, normal wear and tear, or modifications to the LongMill which are not produced or authorized by the Company. Consumables such as cutting tools and sample or stock materials which may have come with your LongMill are not included in this warranty.
This warranty will become void if the operator does not follow the Safety Warnings and Guidelines, uses the Product for illegal purposes, intentionally causes damage to the Product, or transfers the Product to another owner.
The original customer must contact Sienci Labs Inc. within ninety (90) days of receiving their order to make a warranty claim to be eligible for warranty service. Proof of purchase, tracking number, email address, or other material will be used to confirm the original purchasing date and the identity of the original customer. If damage was due to shipping, original packaging materials must be kept in the original received condition. Photos, videos, written descriptions, and other items may be requested to assess and validate a warranty claim. In the case Sienci Labs Inc. requires the original parts to be returned, the customer is solely responsible for packing all items securely. Damage incurred during return shipping will not be covered by the warranty. A method of payment such as a credit card may be requested by Sienci Labs Inc. to cover shipping costs or damaged items if Products are not eligible for warranty service.
During assembly the X axis lead screw would not thread through any of the anti backlash blocks. Turns out the screw was mis-threaded. I paid for a new screw and blocks plus shipping for something that should have worked from the start. Then after finally getting it assembled the screw kept coming out of the coupler no matter how tight I tightened the screw. Once again I ordered some new couplers for fear of over tightening the screw to get it to stay on. It still would not stay in no matter how hard I tightened. At this point I submitted a contact support form with info about the screw and never heard back. I finally gave up and epoxied the screw to the coupler to get it to stay. Not happy I had to pay extra to try and get it to work and horrible customer support.
(2)(0)
Rated 3 out of 5
Anonymous (verified owner)–
No bracket for my 43mm Mafell router, and the sensor kit can’t be easily mounted (I’ll need to design parts and 3D print them for Z and Y axes). Also, haven’t finished assembling, already see rust on my Z rails. The machine needs work but it’ll do what I need it to, just didn’t expect to have those issues.
(2)(0)
Rated 3 out of 5
norman emery (verified owner)–
Have not had a chance to set up yet life got busy
(0)(4)
Rated 3 out of 5
Joseph Hamilton (verified owner)–
Hi Chris, I bought this machine for my neighbour, stretch, who has put most of it together and built a solid bench for it, but unfortunately when we put the first screw into the front foot, the back foot lifted up off the bench by about 10mm. This highlighted a slight bow in the bench top, that was preventing the machine from being able to be fixed down without bending the rail. So he had another crack at building a flatter surface, but he wasn’t happy with his 2nd attempt either. Now I’ve inherited the task, and I’m in the process of cutting out a sturdy flat base on my 2.5m x 1.5m Australian made multicam cnc router. If you check back in with me in a couple of weeks I’m sure he will have tried it out by then, Cheers Joe
(0)(2)
Rated 3 out of 5
Michael Major (verified owner)–
Actually, I’m still arranging my shop. At this moment my LongMill is still in the box. However, as soon as I can I will be very happy to complete this. Thanks!!!!
(0)(12)
Rated 3 out of 5
Jay Nielson (verified owner)–
I had problems with the dust boot nut fitting in the slot. I had/have problems with the wire coming out of the magnet connector of the probe. I am still making a spoilboard and as soon I started a X-axis grinding noise started happening and gets worse every time I proceed so far.
(0)(1)
Rated 3 out of 5
WILLIAM LOWRY (verified owner)–
seems there could be a better way of attaching motors to drive screws other than the couplings currently used. They have a hard time maintaining their grip onj the screws.
The process of attaching the motors also leaves a lot to be desired. If the current process is maintained there should be a lager supply of the nylon washers supplied. They tend to fall off and disappear in the process of attaching the motors. Maybe some type of cheap simple jig could be included to help with motor placement and attachment.
As to the order and receiving process. I received two sets of limit switches having order only one, and only one dust shield when it was my understanding that two would be shipped.
At this point in time I am not sure that getting rid of my Shapeoko in order to purchase the Longmill was the best decision I have made lately,
Hope the feedback is of some assistance.
(6)(2)
Rated 3 out of 5
Anthony McAllister (verified owner)–
Ordering was a good experience, but getting a replacement part has been difficult
(3)(0)
Only logged in customers who have purchased this product may leave a review.
Rick Moore (verified owner) –
During assembly the X axis lead screw would not thread through any of the anti backlash blocks. Turns out the screw was mis-threaded. I paid for a new screw and blocks plus shipping for something that should have worked from the start. Then after finally getting it assembled the screw kept coming out of the coupler no matter how tight I tightened the screw. Once again I ordered some new couplers for fear of over tightening the screw to get it to stay on. It still would not stay in no matter how hard I tightened. At this point I submitted a contact support form with info about the screw and never heard back. I finally gave up and epoxied the screw to the coupler to get it to stay. Not happy I had to pay extra to try and get it to work and horrible customer support.
Anonymous (verified owner) –
No bracket for my 43mm Mafell router, and the sensor kit can’t be easily mounted (I’ll need to design parts and 3D print them for Z and Y axes). Also, haven’t finished assembling, already see rust on my Z rails. The machine needs work but it’ll do what I need it to, just didn’t expect to have those issues.
norman emery (verified owner) –
Have not had a chance to set up yet life got busy
Joseph Hamilton (verified owner) –
Hi Chris, I bought this machine for my neighbour, stretch, who has put most of it together and built a solid bench for it, but unfortunately when we put the first screw into the front foot, the back foot lifted up off the bench by about 10mm.
This highlighted a slight bow in the bench top, that was preventing the machine from being able to be fixed down without bending the rail.
So he had another crack at building a flatter surface, but he wasn’t happy with his 2nd attempt either. Now I’ve inherited the task, and I’m in the process of cutting out a sturdy flat base on my 2.5m x 1.5m
Australian made multicam cnc router.
If you check back in with me in a couple of weeks I’m sure he will have tried it out by then,
Cheers Joe
Michael Major (verified owner) –
Actually, I’m still arranging my shop. At this moment my LongMill is still in the box. However, as soon as I can I will be very happy to complete this. Thanks!!!!
Jay Nielson (verified owner) –
I had problems with the dust boot nut fitting in the slot.
I had/have problems with the wire coming out of the magnet connector of the probe.
I am still making a spoilboard and as soon I started a X-axis grinding noise started happening and gets worse every time I proceed so far.
WILLIAM LOWRY (verified owner) –
seems there could be a better way of attaching motors to drive screws other than the couplings currently used. They have a hard time maintaining their grip onj the screws.
The process of attaching the motors also leaves a lot to be desired. If the current process is maintained there should be a lager supply of the nylon washers supplied. They tend to fall off and disappear in the process of attaching the motors. Maybe some type of cheap simple jig could be included to help with motor placement and attachment.
As to the order and receiving process. I received two sets of limit switches having order only one, and only one dust shield when it was my understanding that two would be shipped.
At this point in time I am not sure that getting rid of my Shapeoko in order to purchase the Longmill was the best decision I have made lately,
Hope the feedback is of some assistance.
Anthony McAllister (verified owner) –
Ordering was a good experience, but getting a replacement part has been difficult