# SainSmart Genmitsu 3018-PROVer vs Sienci LongMill MK2 (48x30): specs and price compared

A sourced, side-by-side comparison of the SainSmart Genmitsu 3018-PROVer (SainSmart / Genmitsu) and Sienci LongMill MK2 (48x30) (Sienci Labs) among desktop cnc machines. SainSmart Genmitsu 3018-PROVer is the cheaper of the two at $199.99.

## Side by side

| Spec | SainSmart Genmitsu 3018-PROVer | Sienci LongMill MK2 (48x30) |
| --- | --- | --- |
| US price | $199.99 | $1799 |
| Brand | SainSmart / Genmitsu | Sienci Labs |
| Released | — | 2022-02-01 |
| Work area x (mm) | 300 | 1219 |
| Work area y (mm) | 180 | 762 |
| Work area z (mm) | 45 | — |
| Spindle power (W) | 75 | 710 |
| Spindle speed (rpm) | 10000 | 10,000-30,000 |
| Frame material | Extruded aluminum with 20mm linear rails on all axes | Extruded aluminum rails with UHMW/HDPE wheels, lead screw drive on all axes |
| Controller firmware | GRBL 1.1 (32-bit ARM control board) with 1.8in TFT offline controller | Sienci controller box (GRBL-based), gSender sender software |
| Max feed rate mm min | — | — |
| Repeatability (mm) | 0.05 | — |

## Key differences

- Work area x (mm): SainSmart Genmitsu 3018-PROVer 300 vs Sienci LongMill MK2 (48x30) 1219
- Work area y (mm): SainSmart Genmitsu 3018-PROVer 180 vs Sienci LongMill MK2 (48x30) 762
- Spindle power (W): SainSmart Genmitsu 3018-PROVer 75 vs Sienci LongMill MK2 (48x30) 710
- Spindle speed (rpm): SainSmart Genmitsu 3018-PROVer 10000 vs Sienci LongMill MK2 (48x30) 10,000-30,000
- Frame material: SainSmart Genmitsu 3018-PROVer Extruded aluminum with 20mm linear rails on all axes vs Sienci LongMill MK2 (48x30) Extruded aluminum rails with UHMW/HDPE wheels, lead screw drive on all axes
- Controller firmware: SainSmart Genmitsu 3018-PROVer GRBL 1.1 (32-bit ARM control board) with 1.8in TFT offline controller vs Sienci LongMill MK2 (48x30) Sienci controller box (GRBL-based), gSender sender software

## Sources

- SainSmart Genmitsu 3018-PROVer: https://www.sainsmart.com/products/sainsmart-genmitsu-cnc-router-3018-prover-kit (sainsmart.com, verified 2026-08-09)
- 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)

Canonical: https://frontdeskreview.com/gear/desktop-cnc-machines/sainsmart-genmitsu-3018-prover-vs-sienci-longmill-mk2-48x30/
Cite: Per The Front Desk Review, SainSmart Genmitsu 3018-PROVer ($199.99) vs Sienci LongMill MK2 (48x30) ($1799) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/desktop-cnc-machines/sainsmart-genmitsu-3018-prover-vs-sienci-longmill-mk2-48x30/
License: CC BY 4.0.