The AltMill is the pinnacle of hobby CNCing, bringing industrial-level precision to a price point and ecosystem for both beginners and advanced users. The AltMill MK2 2×4 is your go-to CNC when time, performance and precision are crucial for production-level reliability.
The AltMill MK2 2×4 comes with a standard 80mm spindle mount only. It does not come with a spindle, which must be purchased separately.
Ontario, Canada Customers: Starting April 29th, we’ll be pausing sales for all sizes of AltMill. Please read further on specific plans for each machine – ESA Compliance.
Production level cutting speeds (approx. 600 inches/minute)
Closed loop motor system on all three axis to auto-correct positioning and auto-stop when necessary (reliable for production style work)
Requires little maintenance during project production
Advanced, production-style features including Y-axis auto-squaring; limit switches by default; and tram adjustment capabilities
Cuts materials ranging from hardwoods to plastics, foams, composites, aluminum – even steel
Support for 80mm spindles and routers
25″ x 49″ working area with a max Z-height of 5.5″
Footprint of 59″ wide and 38″ deep
Lead times This product has a potentially long waitlist, relative to demand and seasonality. For more info on expected shipping and delivery times, please see our Order Status page.
Additional information
Weight
76 lbs
Dimensions
38 × 11 × 12 in
Include Spindle and Dust Shoe Kit
Include Spindle and Dust Shoe Kit, Machine Only
origin-criterion
C
What's Included
***Included with your AltMill MK2 2×4***
SLB-EXT controller and emergency stop
Partially pre-assembled rigid frame
Inductive sensors for homing
Sturdy metal legs with the ability to add 4ft wide shelving underneath
Welcome package
***Not included with your AltMill MK2 2×4*** Check out our recommended products tabs for an ideal set up, but note the following ARE NOT included with your order:
Computer or laptop
Spindle
End mills or bits
T-tracks
Waste board (e.g. MDF 2ft x 4ft sheet)
Set of metric Allen keys, standard bits or drill for assembly
***Some photos may contain items for illustrative purposes, such as spindles, caster wheels, t-tracks, or additional shelving. There may also be cosmetic differences between the machine in the photo and the production version of the AltMill.
Full Payment is required at time of purchase to get your order into the Queue. We ship on a first-come, first-served basis. If you choose local pick-up, you are subjected to the queue order and cannot get your machine quicker.
Power Requirements
Altmill with the 1.5kW spindle. We recommend allocating 2x 15A, 110V/120V circuits — one for the spindle, the other for the machine and a computer.
The AltMill consumes 500W and runs off a 48V 10A power supply, 110-120 volt circuit
The 1.5KW Spindle Kit consumes 1500W at max load, 110-120 volt circuit
Altmill with the 2.2kW spindle. We recommend allocating 1x15A, 110V/120V & 1x 20A, 220/240 Circuit — one for the spindle, the other for the machine and a computer.
The AltMill consumes 500W and runs off a 48V 10A power supply, 110-120 volt circuit
The 2.2KW Spindle Kit consumes 2000W at max load, 220-240 volt circuit
If you live in a country with 220V/240V power you must use a transformer to convert to 110V/120V.
To solely run the machine, you need a rating above 500W
To run the machine and a 1.5kW spindle, you need a rating of 2000W
I would like to source my own spindle, what should I be aware of?
For spindles 2.2KW or above, you will need to install extra 220VAC wiring
The AltMill comes with an 80mm spindle mount, we do not have larger diameter mounts at the moment
The VFDs that may work with our controller are: Huanyang v1, Huanyang P2A, Yalang YL620, H-100, and GS20, however they are not plug-and-play — read this article for further information
More Information
Check out our comprehensive FAQ for prospective customers, addressing questions such as power requirements, spindle sourcing, and bundle deal info.
Warranty
The AltMill has a 120 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 AltMill 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 accept returns for AltMills that have already shipped.
General Warranty and Limits of Service:
Effective March 11, 2024
Throughout this policy the words “we”, “us” and “our”, or “Sienci Labs” will be used to refer to Sienci Labs Inc. herein and “AltMill” or “machine” will refer to Sienci Labs’ Sienci AltMill. 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 AltMill (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 one hundred and twenty (120) 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 AltMill 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 AltMill 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 AltMill 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 one-hundred and twenty (120) 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.
We will be shipping to US customers with UPS option only.
59 reviews for AltMill MK2 2×4
4.4
Based on 59 reviews
5 star
72
72%
4 star
11
11%
3 star
6
6%
2 star
3
3%
1 star
5
5%
Rated 5 out of 5
Christophe (verified owner)–
Excellent experience. The machine is fast, efficient, and easy to use.
The assembly experience was also simple, well-documented, and enjoyable.
Thank you Scienci Lab for this fantastic CNC machine.
(0)(0)
Rated 5 out of 5
Hamilton G. (verified owner)–
Replaced my Shark with the Altmill 2×4. Absolutely love it, a big step up in functionality.
(0)(0)
Rated 5 out of 5
steve (verified owner)–
well thought out design not cheap —-low priced high quality .My background owned cnc router for 15 years and ran-programed cnc machines for 40 years
(0)(0)
Rated 5 out of 5
Scott M. (verified owner)–
Great CNC. No difficulties in assembling or getting to the first motions and cuts. It would be nice to see some of the loose wires such as those from the stop sensors have covers so that their not hanging out ready to be snagged and broken. The same holds true regarding the power plug to the SLB. It’s not a great look on an otherwise well thought out machine. Also, offering a simple pendant would put you head and shoulders above the competition. The game controller options is sort of lame.
(0)(0)
Rated 1 out of 5
Robert Schoenfeldt (verified owner)–
I still never got it to home properly
(0)(0)
Rated 5 out of 5
Kris I. (verified owner)–
Great Pricing for what you get.
(1)(0)
Rated 5 out of 5
Anonymous (verified owner)–
The machine is built well and pretty straight forward to assemble if the instructions are followed closely. I will say the only thing that was a bit cumbersome was getting all the proximity switches set up. The guys in my shop had a tough time with them. I come from an industrial maintenance back round so I am familiar with them and their acute tolerances so it wasn’t a big deal we got it sorted out. for someone who has never worked with them and doesn’t understand how fickle they can be and process of getting them all queued at the same time it could be a struggle but nothing that cant be figured out. As far as I know there weren’t any specific videos supporting this potential hang up. Other than that this machine is awesome and we will purchase another in the near future.
(0)(0)
Rated 5 out of 5
gary hill (verified owner)–
Love it! Fits perfectly in my confined space.
(0)(0)
Rated 5 out of 5
Paul B. (verified owner)–
I am very satisfied with my Atmill. It was straightforward to assemble with all of the components fitting perfectly. It is extremely accurate and amazes me every time I use it.
(0)(0)
Only logged in customers who have purchased this product may leave a review.
Christophe (verified owner) –
Excellent experience. The machine is fast, efficient, and easy to use.
The assembly experience was also simple, well-documented, and enjoyable.
Thank you Scienci Lab for this fantastic CNC machine.
Hamilton G. (verified owner) –
Replaced my Shark with the Altmill 2×4. Absolutely love it, a big step up in functionality.
steve (verified owner) –
well thought out design not cheap —-low priced high quality .My background owned cnc router for 15 years and ran-programed cnc machines for 40 years
Scott M. (verified owner) –
Great CNC. No difficulties in assembling or getting to the first motions and cuts. It would be nice to see some of the loose wires such as those from the stop sensors have covers so that their not hanging out ready to be snagged and broken. The same holds true regarding the power plug to the SLB. It’s not a great look on an otherwise well thought out machine. Also, offering a simple pendant would put you head and shoulders above the competition. The game controller options is sort of lame.
Robert Schoenfeldt (verified owner) –
I still never got it to home properly
Kris I. (verified owner) –
Great Pricing for what you get.
Anonymous (verified owner) –
The machine is built well and pretty straight forward to assemble if the instructions are followed closely. I will say the only thing that was a bit cumbersome was getting all the proximity switches set up. The guys in my shop had a tough time with them. I come from an industrial maintenance back round so I am familiar with them and their acute tolerances so it wasn’t a big deal we got it sorted out. for someone who has never worked with them and doesn’t understand how fickle they can be and process of getting them all queued at the same time it could be a struggle but nothing that cant be figured out. As far as I know there weren’t any specific videos supporting this potential hang up. Other than that this machine is awesome and we will purchase another in the near future.
gary hill (verified owner) –
Love it! Fits perfectly in my confined space.
Paul B. (verified owner) –
I am very satisfied with my Atmill. It was straightforward to assemble with all of the components fitting perfectly. It is extremely accurate and amazes me every time I use it.