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AltMill 48×48


This is a pre-order for the AltMill. Please note that any items ordered with the AltMill will ship together at a later date.

Machines are expected to start shipping July 2024 or later. Please check the Order Status page for more information and the AltMill Launch and Production Schedule article.

The AltMill represents the pinnacle of hobby CNCing, bringing industrial-level technologies to a price point and ecosystem for both beginners and advanced users.

For complete details about the AltMill, please see our Everything You Need to Know About the AltMill page.


Experience next-level power and precision with the AltMill.

You will need to provide your own*:

  • Computer
  • End Mills
  • Set of metric Allen keys, standard bits, and drill for assembly
  • MDF for the wasteboard (4ftx4ft sheet)

*Items such as the spindle, t-tracks, and additional shelving as shown in the photos do not come by default with your kit. There may be some cosmetic differences between the machine in the photo and the production version of the AltMill.


  • Rigid frame and linear motion design using HGR15 linear guides and ball screws on all axis mounted to a custom-designed, machined aluminum extrusion
  • Closed loop stepper motors for over 600IPM
  • Support for 80mm spindles and routers
  • Approximately 49″ by 49″ inch working area with a max z-height of 5.5″
  • Footprint of 59″ wide and 62″ deep
  • Inductive sensors for homing included
  • Sturdy metal legs with the ability to add 4ft wide shelving underneath

Pre-order information

Please note that this is a pre-order. Machines are currently in production and some aspects are still under development. For more information, please see the AltMill Launch and Production Schedule article.

AltMills from this pre-order are expected to start shipping July 2024.

Additional information

Weight 60 lbs
Dimensions 60 × 6 × 8 in
Include Spindle and Dust Shoe Kit

Include Spindle and Dust Shoe Kit, Machine Only

Spindle Package and Dust Shoe

Unlock the full potential of your AltMill with the AltMill Spindle and Dust Shoe Package.

Add on the AltMill Spindle and Dust Shoe Kit, which comes with:

  • Dust shoe
  • 2 Bristles (Long and Short versions)
  • 2 Hose Clamps
  • ER16, 80mm, 1.5KW 110V Air-Cooled Spindle
  • 110V, 1.5KW, 3-Phase VFD
  • AC power cable and Spindle power cable
  • ER16 1/8, 1/4″, and 3/8″ collet
  • Data cable to connect to the AltMill controller for speed control

If you do not bundle your AltMill order with the Spindle and Dust Shoe Kit at the time of order, a separate order page will be available in a few weeks.


Other add-ons for the AltMill

The AltMill will soon be able to work with our add-ons such as the:

  • Vortex Rotary Axis
  • LaserBeam Laser System
  • AutoZero Touch Plate

We are working on the testing and resource development to help users learn how to use these add-ons.

For a selection of end-mills, please check out our store. Tooling used for the LongMill can also be used for the AltMill.

Please note that if you order additional items alongside your AltMill, they will ship together.


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.