Image: Sainsmart
Sainsmart Genmitsu 3018 REX
Sainsmart
Best for: Beginners and supervised teaching projects needing a small CNC with homing switches and an emergency stop
Typical starting price
$249Editorial baseline for this machine
Overall score
Best current buying path
Where to buy
SainSmart: $249 · checked Oct 23
- Shipping varies by retailer
- Check manufacturer site for availability
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Quick verdict
The 3018 REX updates the small 3018 format with pre-assembled modules, an X-axis linear guide, Wi-Fi and limit switches. The manual identifies the included spindle as a 775 DC motor rated at 9000 RPM, although its wattage is not stated. Its quoted maximum motion speed should not be read as a tested cutting feed. Assembly still includes spindle installation and wiring. Material capability depends on tooling, setup and cutting conditions.
Who this fits best
Beginners and supervised teaching projects needing a small CNC with homing switches and an emergency stop
Buy this if
Beginners and supervised teaching projects needing a small CNC with homing switches and an emergency stop. Pre-assembled base and gantry modules; spindle installation and wiring still required.
Skip this if
Spindle wattage is unstated; the manual specifies a 775 motor at 9000 RPM, and x-Z carriage is still plastic, which caps how hard you can push any spindle.
What else you still need
Add cutters for the intended job and dust extraction. Four clamps, a carving-bit set and a Z-probe are listed in the manual. The Y-axis rail kit, offline controller, laser and rotary accessories are separate options.
Material reality check
Sainsmart markets the machine for wood, acrylic and PCB work. Metal-cutting rates and hardwood capacity need a documented setup and test; the published spindle information does not establish them.
Better alternative if...
compare the 3020-PRO Ultra if you need a different spindle and gantry configuration; check actual cutting tests for your intended material. See Sainsmart Genmitsu 3020-PRO Ultra
Where it wins
- Pre-assembled base and gantry modules; spindle installation and wiring still required
- HGH15 linear guide on the X axis is a real step up from the rod-only gantry of older 3018s
- 60 mm Z travel and a stated 91 mm gantry clearance
- Limit switches, homing and an E-stop are fitted from the factory
- Built-in Wi-Fi and ports for optional rotary and laser accessories
Where it falls short
- Spindle wattage is unstated; the manual specifies a 775 motor at 9000 RPM
- The X-Z carriage includes plastic parts
- Y axis stays on round shafts unless you buy the separate linear rail kit
- Small 300 x 180 mm working area
- The anniversary edition is limited to 300 units; confirm regional availability
Specifications
300 × 180 mm
540 cm²
n/a
Included 775 DC spindle motor, 12-24 V; motor power not stated
32-bit GRBL 1.1h controller with Wi-Fi, laser/rotary expansion, limit switches and emergency stop
5 kg
$249
budget
Full specification table
Relative to database
Benchmark Scores
Overall Score
Composite across 5 dimensions
Community Sentiment
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