Plans for Slab Flattening Mill DIY


Instant Digital Download

Digital plans and files for the Ultimate DIY Slab Flattening Mill. Please read all details below before purchasing plans.

To build this mill using this plan (as shown in the pictures), you will need a CNC milling machine and a 3D printer (in addition to common woodworking tools/power equipment).

Downloadable files include:
- 4 Detailed PDF drawings with dimensions and notes
- A cut sheet layout for MDF pieces
- Zip folder containing 24 STL files for 3D printing (rack & pinion mechanism and the brake/increment mechanism). 5 different brake/increment gears to choose from depending on the diameter of the straight cutter router bit you want to use (1”, 1.125”, 1.25”, 1.375”, 1.5”)
- 7 CAD (.step) part files to create CNC tool paths (tool path files not provided). All tool path cuts can be done with one cutter (0.25” straight cutter). These include the side gantry pieces and cam clamps
- Assembly notes
- BOM/parts list with pictures and links to purchased components
- 120+ Supplementary pictures of the assembly process with notes

3D printing:
- All of the printed parts will take approximately 70-90 hours to 3D print depending on your settings and 3D printer
- 100% infill should be used for durability and strength

Estimated BOM cost: $230 USD

This plan was designed around a DeWalt plunge router (acrylic base plate is 6”x6”) - a router with a wider/longer base plate than this will not fit inside the gantry. Check and see if your plunge router will fit inside the gantry first before purchasing.

The design of this mill allows for maximum flattening cutting area of 48 inches x 22 inches and a maximum slab thickness of 2.25" inches (depending on how twisted/warped the slab is).
The overall length, width and height can be adjusted to fit your needs, you just need to adjust them as necessary and 3D print more gear racks. CNC files for a larger gantry can be provided at an additional cost (message me before purchasing).

Building this Slab Flattening Mill will require a lot of time and work to make but it will save you a lot of time and money later on.

See instagram profile to view videos of this slab flattening mill in action!

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  • Accepts Etsy gift cards

Returns & Exchanges

I gladly accept returns and cancellations

Just contact me within: 14 days of delivery

Ship items back to me within: 30 days of delivery

Request a cancellation within: 24 hours of purchase

I don't accept exchanges

But please contact me if you have any problems with your order.

The following items can't be returned or exchanged

Because of the nature of these items, unless they arrive damaged or defective, I can't accept returns for:

  • Custom or personalized orders
  • Digital downloads
  • Items on sale

Conditions of return

Buyers are responsible for return shipping costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value.

Frequently Asked Questions

Can this design be engraved?

I can engrave any black and white image. The black details on the image is what will be engraved. A higher quality image results in a better engraving.

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