SainSmart Genmitsu 4040-PRO MAX CNC Router, 710W Trimmer & Linear Rail Driven, Work Area 410 x 405 x 77mm, for Wood Metal Acrylic Cutting Milling, GRBL Control
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30-day refund / replacement
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Availability:
Only 10 left in stock, order soon!
Arrives
Monday, Apr 27
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Features
- Next-Generation Precision: Advanced X-axis and Z-axis linear guideway structures for enhanced motion stability and precision.
- Reinforced Spoilboard with Integrated T-Track: The upgraded spoilboard features a central aluminum support bar that reinforces the MDF to prevent sagging under load, while also serving as a T-slot to enable more versatile clamping and fixture options.
- Powerful Performance: Equipped with a high-powered 710W digital display compact router for superior engraving and cutting.
- High Production Efficiency: Reduced machine vibration ensures high precision and stable motion during fast, high-power operations.
- Increased Pass Height: Offers a 100mm pass height, over 40% higher than the PRO version, for engraving taller materials. Upgrade your trimmer without worrying about a reduction in engraving height.
Brand: SainSmart
Material: Metal
Power Source: ac_dc
Product Dimensions: 15.75"W x 3.07"H
Voltage: 24 Volts
Power Source: ac_dc
Voltage: 24 Volts
Horsepower: 0.95 Horsepower
Amperage: 4 Amps
Base Type: Fixed
Battery Description: Corded electric
Material Type: Metal
Item Dimensions W x H: 15.75"W x 3.07"H
Brand Name: SainSmart
Model Number: 4040PM
UPC: 810168141510
Manufacturer Part Number: 4040PM
Manufacturer: Sainsmart
Included Components: CNC Milling Machine
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Apr 27
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
New to CNC. GREAT beginner machine. Easy assembly. Solid machine for the money. Using Easel program makes it easy for beginners
Reviewed in the United States on April 10, 2026 by S. Wise
The media could not be loaded. The Goods: The assembly was very quick and easy. After doing a through review and calibration check of the X, Y and Z axis. I found this machine to be very accurate (~.01mm) with minimal backlash! This CNC seems like a very durable and highly capable machine. I will be doing additional testing in the near future. But so far things feel very solid and accurate. The Bads: (but maybe some good...) During calibration and tolerance checks I found that the provided router had a whopping .3mm runout!!! I was able to email support and after providing a short video of the runout they very quickly sent me a replacement at no cost. I was very happy with the support that was provided from Sainsmart to quickly resolve this issue. The new router is well within acceptable tolerance and will allow me to continue testing. So far, I am very happy with my purchase and it seems like a very capable CNC for the value.
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Reviewed in the United States on September 18, 2025 by Matt
Love this little guy. Once star off for the winky two piece bed (why do we let the shipping department take part in engineering decisions?), but other than than I've had only good outcomes. I do recommend the relay switch that SainSmart sells so your software can control the spindle on-off. I only had to drag one bit to decide that was a necessity.
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Reviewed in the United States on February 28, 2026 by Shayz
Received this item July 3rd, 2025, but held off on review because of problems encountered with limit switches and gSender software. First, limit switches. After a successful setup and a few test runs, the x-axis limit switches locked in tripped mode and Homing failed to work. Contacted Amazon for help and they informed me that I must contact Genmitsu direct and contact them (Amazon) again if Genmitsu failed to solve the problem. The Amazon agent promised to follow up in a week, but FAILED to do so. In the meantime, I contacted Genmitsu (Sainsmart) via email as they are in China and several hours behind us. They were cooperative but did not have a resolution. However, they did offer a replacement or refund if I wanted to return. I decided to try to resolve the problem myself and traced the circuit to the circuit board mounted to the rear of the X-axis. By disconnecting and reconnecting the connector for the x-axis, the problem went away. The unit then worked great but after a bit the circuit failed again. This happened a few times with reports going back to Sainsmart each time. After carefully squeezing the pins on the connector it seemed the problem was corrected. In the meantime, since I was willing to troubleshoot on my own, Sainsmart sent me a package of spare parts for free. It took a few weeks, but it's working fine now. Second problem. I used gSender version 1.5.1 to control the cnc because I prefer the interface over UGS which is supplied with the unit. The problem was that the machine would only run for a minute or so and then Halt. Sainsmart was not able to help with this problem so I did some experimenting using other software and and found the the same gCode running on Universal gCode Sender (USG) ran without a problem. Turns out, gSender defaults to grblHAL if it doesn't recognize the machine and the Genmitsu only recognizes grbl. Switchint gSender to grbl solved this problem. At first, I was quite upset with my purchase, but am happy with my 4040 Pro Max after resolving my problems. Actually, I learned so much in the process that I am kind of glad it happened this way. Amazon is usually helpful in solving problems, but in this case they flopped and Sainsmart was the winner.
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Reviewed in the United States on August 28, 2025 by V. Novak
This CNC machine is capable of producing clean engraving and accurate cutouts once everything is set up correctly. Assembly was straightforward, and with enough time spent learning the workflow, it can deliver decent results. However, I do not recommend this machine due to a serious safety concern that is not obvious to new users. There is very little margin for error when cutting all the way through material. If your workpiece is positioned directly above the machine bed or T-tracks, even small variations in material thickness or Z height can cause the bit to cut deeper than expected. In my experience, this brought the cutter dangerously close to contacting metal components beneath the work surface. A spinning cutter striking metal can result in immediate tool damage and unpredictable machine behavior. This creates a real risk of broken bits, and in some cases the bit can snap under load, which could potentially injure the operator. It can also lead to shifting material or debris being thrown, which adds to the overall hazard. The machine offers very little forgiveness in a critical part of the cutting process. Because of this lack of safety margin during full cut-through operations, I cannot recommend this machine, especially for beginners. It can produce good results, but only with additional setup and precautions that are not clearly addressed upfront. If you do choose to use it, make sure you implement a proper spoilboard and take extra care when setting Z height before attempting any full cut-through cuts.
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Reviewed in the United States on April 18, 2026 by Stephen G.