# Sienci LongMill MK2 (48x30) vs OpenBuilds LEAD CNC 1010: specs and price compared

A sourced, side-by-side comparison of the Sienci LongMill MK2 (48x30) (Sienci Labs) and OpenBuilds LEAD CNC 1010 (OpenBuilds) among desktop cnc machines. OpenBuilds LEAD CNC 1010 is the cheaper of the two at $1665.97.

## Side by side

| Spec | Sienci LongMill MK2 (48x30) | OpenBuilds LEAD CNC 1010 |
| --- | --- | --- |
| US price | $1799 | $1665.97 |
| Brand | Sienci Labs | OpenBuilds |
| Released | 2022-02-01 | — |
| Work area x (mm) | 1219 | 730 |
| Work area y (mm) | 762 | 810 |
| Work area z (mm) | — | 102 |
| Spindle power (W) | 710 | — |
| Spindle speed (rpm) | 10,000-30,000 | — |
| Frame material | Extruded aluminum rails with UHMW/HDPE wheels, lead screw drive on all axes | C-Beam aluminum extrusion with dual XLarge C-Beam gantry plates, Xtreme solid V-wheels |
| Controller firmware | Sienci controller box (GRBL-based), gSender sender software | OpenBuilds BlackBox Motion Control System (ATmega328p, GRBL 1.1) |
| Max feed rate mm min | — | — |
| Repeatability (mm) | — | 0.08 |

## Key differences

- Work area x (mm): Sienci LongMill MK2 (48x30) 1219 vs OpenBuilds LEAD CNC 1010 730
- Work area y (mm): Sienci LongMill MK2 (48x30) 762 vs OpenBuilds LEAD CNC 1010 810
- Frame material: Sienci LongMill MK2 (48x30) Extruded aluminum rails with UHMW/HDPE wheels, lead screw drive on all axes vs OpenBuilds LEAD CNC 1010 C-Beam aluminum extrusion with dual XLarge C-Beam gantry plates, Xtreme solid V-wheels
- Controller firmware: Sienci LongMill MK2 (48x30) Sienci controller box (GRBL-based), gSender sender software vs OpenBuilds LEAD CNC 1010 OpenBuilds BlackBox Motion Control System (ATmega328p, GRBL 1.1)

## Sources

- Sienci LongMill MK2 (48x30): https://sienci.com/2022/02/24/everything-you-need-to-know-about-the-longmill-mk2-48x30-and-extension-kits/ (sienci.com, verified 2026-08-09)
- OpenBuilds LEAD CNC 1010: https://www.makertechstore.com/products/openbuilds-lead-cnc-1010-40-x-41 (makertechstore.com, verified 2026-08-09)

Canonical: https://frontdeskreview.com/gear/desktop-cnc-machines/sienci-longmill-mk2-48x30-vs-openbuilds-lead-1010/
Cite: Per The Front Desk Review, Sienci LongMill MK2 (48x30) ($1799) vs OpenBuilds LEAD CNC 1010 ($1665.97) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/desktop-cnc-machines/sienci-longmill-mk2-48x30-vs-openbuilds-lead-1010/
License: CC BY 4.0.