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Bantam Tools Desktop CNC Mill Review [2022]-Compact

Bantam Tools Desktop CNC Mill Review [2022]-Compact

Bantam Tools Desktop CNC Mill Review [2022]-Compact

The Bantam Tools desktop milling machine is a 3-axis CNC mill primarily intended for product designers, educators, and hobbyists.

It is a ready-to-use fully enclosed CNC milling machine that lets you smoothly mill aluminum and materials of similar hardness.

In this guide, I break down every aspect about this CNC, to help you decide whether this is the right machine for you.

Bantam Tools Desktop CNC Milling Machine Review

For this review, I considered the performance of the machine on various parameters like size, material capability, aluminum milling, software, ease of use, community, and customer support among others.

Size

Bantam Tools work envelope
Bantam Tools work envelope

With a footprint of 20.9” x 19.8”, bantam tools CNC has a cutting area of 9” x 7”.

This cutting area is close to the 8"x 8" offered by the Nomad 3 CNC by Carbide 3D, which is a competitor to the Bantam CNC.

With its small footprint, you can comfortably fit it on most desks and store it inside a shelf when not in use making it a perfect fit for classrooms and labs.

One quirk I noticed was that a stepper motor sticks outside from the side of the machine, which could have been avoided in the design.

Material Capability

T-slot work bed on Bantam Tools CNC
T-slot work bed on Bantam Tools CNC

This mill is capable of processing 3D parts with materials like aluminum, brass, copper, acrylic, Delrin, hardwoods, and plastics.

While it can mill several materials, aluminum milling is the most useful application of this CNC.

Due to the relatively small work area, it's not intended for woodworkers who usually work with large materials.

When traversing, this desktop mill can hit a maximum speed of 250 ipm which is quite impressive.

You can make small 2D designs on steel by engraving, but it is not the ideal router to cut steel efficiently.

It can also be used for making PCBs, but it does not support G 85 commands for slotted holes.

Aluminum Milling

Aluminum parts made on Bantam Tools desktop mill
Aluminum parts made on Bantam Tools desktop mill

The machine is built for cutting aluminum, and it can do a good job in processing small-sized aluminum stock.

For aluminum milling, the speeds and feeds need to be carefully balanced with the chip load.

As an example, with a 1/8" flat end mill, at 0.002" depth of cut, you should be able to hit a feed rate of ~60 ipm with this CNC mill.

Pay special attention to the first pass with any CNC mill as any irregularities (burrs, warping) on the surface can mess up your calculations.

For fast milling, strong work holding is extremely important.

Bantam tools mill comes with a T-slot table and has an integrated L-bracket and toe clamps fixed on it for work holding.

There are plenty of videos on YouTube that showcase the machine plowing through aluminum which is an endorsement of its aluminum cutting ability. 

Overall, it mills well on aluminum, its high-powered spindle, and strong aluminum frame give the machine enough rigidity to cut aluminum.

Chassis / Frame

Frame of Bantam Tools desktop CNC mill
Frame of Bantam Tools desktop CNC mill

The CNC has a solid aluminum frame made of ⅝” aluminum bars.

20mm linear rails are used to build the X and Y axes, and the Z-axis is made of 16mm rail.

This desktop CNC is well built with a billet aluminum frame, a heavy gauge stainless steel for the body, and plastic side panels.

The plastic side panel is a bit disappointing however it doesn't have any bearing on the performance of this machine.

Transparent windows and door give you 180° viewability while using the mill.

Further, the polycarbonate loading door swings up and down and is supported by two magnetic locks.

The overall design is broadly similar to the highly-rated Nomad 3 from Carbide 3D.

There are rubber bushes in each corner and the middle to absorb vibrations during operation.

A pair of vents on both sides of the machine helps with air circulation inside the enclosed machine and heat dissipation.

Linear Motion

Linear bearings on Bantam Tools desktop CNC
Linear bearings on Bantam Tools desktop CNC

All three axes are controlled by a lead screw mechanism with linear bearings, which helps in generating tremendous holding power and thrust.

PTFE‐filled acetal resin sleeve bearings allow for fast speed and good machine rigidity.

Spindle

ER 11 collet on spindle of Bantam Tools desktop CNC
ER 11 collet on spindle of Bantam Tools desktop CNC

The spindle uses an ER-11 collet and you get a usable power of ¼ hp with a speed range of 8,500 - 26,000 RPM.

A 250-watt BLDC motor is used to drive the spindle and is coupled with the spindle using a belt drive.

The BLDC motor has a rated power of 250 W and spins at an RPM that ranges between 10,000 - 28,000 RPM.

While the spindle power of 250 W is higher than the 130W offered by Nomad 3, the spindle power is usually not the limiting factor when pushing these desktop CNC mills.

The RPM at the spindle output is lower than the motor speed, this helps in providing better torque performance for cutting aluminum.

A brushless motor helps to reduce the operation noise and increases the lifetime by cutting down brush and commutator erosion. 

The enclosures help somewhat mask the noise generated by this CNC while milling, but you shouldn't be near any CNC mill for a long duration without wearing hearing protection.

If you intend to run this in an office setting, you should expect to hear a low/medium drone noise while it does the milling.

Controller and Electronics

Controler

Controller and power supply sections are housed behind the machine.

This helps minimize dust interference and increases cooling capability.

The power supply is a simple 3 prong plug adjacent to the on/off switch.

A‐type to B‐type 2.0 USB cable with a ferrite bead is provided with the machine to connect it with the computer.

The addition of a ferrite bead filter clears high-frequency noise energy by converting it to heat.

Electronics

It requires a power supply of 100-240 Volts, AC 50/60 Hertz, 350 Watts for the machine. This means you can plug it into a common wall socket.

It has built-in touch probing, you can throw in a chunk of material and have the machine automatically trace out the surfaces for you. 

There is an external E-stop switch and a hidden magnetic switch for the front door. The E-stop switch wires are heat-shrunk-covered, that’s good.

The magnetic switch on the front door prevents the machine from running with the doors open and makes it safer to operate.

All the axes have mechanical limit switches that help in homing the axes and prevent the gantry from crashing into the frame.

Software for Bantam Tools Desktop CNC

Bantam Tools milling machine software window
Bantam Tools milling machine software window

Bantam Tools provides their custom-made control software for running this mill.

Further, the software has CAM capabilities for SVG files for 2.5-dimensional designs. 

The most common workflow here would be to design in a CAD software program, generate G-Code using CAM software, and import it into Bantam tools control software.

While you will still need CAD and CAM software programs, the CAM functionalities built into the bantam tools software is useful.

Fusion 360 is the best choice for CAD/CAM when using Bantam CNC as the tool libraries are pre-made and ready to be imported into Fusion 360.

One very important aspect of Bantam tools software is that it's offered in two versions, a basic free version, and a paid subscription version.

While the basic version does much of what most people need, some advanced features like conversational CAM and PCB milling support are only available if you subscribe.

The conversational CAM feature lets you make modifications in your G-code on the fly without having to go back to your CAM software.

Basic free version supports file formats such as, .gcode, .tap, .nc, .svg, .btm.

Subscription version supports all basic version formats and additionally supports .brd, .gtl, .gbr, .cmp files.

While the software is simple to use, tech support is available in case you need help.

The subscription model employed by Bantam tools for using advanced features is quite unique among other competing CNC machine brands.

While some control software programs like Mach3 are paid, you only pay once.

Note that this software program works offline, and is not cloud-based, which can be a major annoyance for some users.

Also, Bantam’s software has a simulation mode that will show you the result of your operation beforehand, with an estimated time for the milling.

The milling software tracks spindle time and it will alert you when it’s time to re-tension the belt drive with the included tool.

'Safety cover open' and 'e-stop button pressed' notifications built into the software are useful safety features.

Accessories

Fixture & tooling plate

Bantam Tools offers multiple fixture plate that allows you to expand the work area and allows you to fix larger workpieces.

However, the cut area will remain the same. It also provides you with additional work holding capabilities.

So, if you want to make small designs on a large workpiece you can get a fixturing plate and replace the default work bed.

Toolset

One toolset is provided by Bantam with their machine, more can be purchased directly from their website. It’ll come in handy for shared workspaces.

Wrenches, pulley belt set, replacement collet, rubber feet, and more too are sold separately on Bantam’s accessory page.

CNC spindle-house replacement kit

An essential, which runs at the center of the machine.

With time, this part of the machine will likely get some wear and tear.

In the best interest of the machine, this part has to be replaced for the proper and accurate milling operation of the CNC machine.

This kit contains a preassembled spindle house, torque wrench, ratchet wrench, rod ejector and inserter tool, 3/16” square drive, bearing plugs, and some more items.

External chip collector

The machine lacks a built-in chip collection mechanism. 

But there is a port at the backside of the machine, an external system can be integrated to effectively manage chip collection.

Even without the chip collection mechanism the dust can be contained inside the chip room, thanks to the enclosure.

Assembly

The mill comes in a medium-density white foam packing, in a pre-assembled enclosure with an aluminum piece placed in the work area to get it tested and running.

With the pre-assembled setup, you can get started in no time.

The assembly box has: 

  • A Power Cable of IEC Type B
  • A standard quarter-inch collet 
  • A couple of cutting tools
  • A quarter-inch shaft
  • Some spindle wrenches

The support section on Bantam's website can guide you on connecting the cables.

The only work for you is to install and set up the software program.

With the well-detailed instruction manual for help, you can set it up and start cutting in an hour.

Community

While it has excellent US-based customer support, there is no dedicated community for Bantam tools CNC owners.

This is definitely something Bantam tools must improve on, as CNC machine users often need a lot of after-sale community support for successful operation.

Customer Support

Customers can connect with Bantam through Bantam Tools’ official website, visit their “contact us / submit a request” page, or through their support email.

They have a 30-day return policy for their products. It can be utilized if a defective product is delivered to you or if you are not satisfied with your purchase.

Warranty for 1 year is provided from the date of purchase, an additional 1-year add-on warranty upgrade is also available at an extra cost.

For purchased software, regular updates, curated projects for sample testing, advanced probing, and much more are provided.

Final thoughts

The Bantam tools desktop CNC milling machine is a good choice for milling small stock, especially Aluminum.

While the subscription model can be irksome for some users, that's the overall direction in which most software programs are going (e.g. Fusion 360).

Overall, it's a well-built CNC machine that gives you everything you need to do well with your CNC including software, spare parts, accessories, and customer support.

Bantam Tools Desktop CNC Mill vs Carbide 3D Nomad 3

Bantam Tools Desktop CNC MillCarbide 3D Nomad 3
Work area9” x 7” x 3.5”8" x 8" x 3"
Linear motionLead screw mechanism with linear bearings on all axisLead screw with anti-backlash nuts on all axes
Chassisbuilt with a billet aluminum frame, a heavy gauge stainless steel for the body, and plastic side panelsAluminum all-metal body
Spindle10,000 - 28,000 RPM0 - 24,000 RPM Spindle
AssemblyPre-assembled(~30 minutes)Pre-assembled(~30 minutes)
Price~$4,000~$2,800

Comparison of Bantam Tool Desktop CNC Mill and Carbide 3D Nomad 3
Carbide3D Nomad CNC
Carbide3D Nomad CNC

Nomad 3 is a well-built and time-tested desktop CNC from Carbide 3D.

When it comes to the work area available on both machines, Bantam Tools can cut thicker workpieces than Nomad 3.

Bantam tools have a work area of 63 cubic inches and Nomad 3 has a 64 cubic inch work area. But the Z-axis travel is 1/2" longer on the Bantam Tools CNC mill.

The linear drive mechanism on Nomad 3 is better than Bantam Tools as it uses anti-backlash nuts to compensate for the backlash error in lead screws.

Chassis of Bantam Tools has a more rigid and heavy construction than Nomad 3 making it a much more suitable machine for cutting aluminum.

On the software front, Nomad 3 has diverse software for various applications. However, some features and software are paid.

The software on Bantam Tools is optimized for 3D milling and some features are restricted behind a paywall.

Carbide 3D has a large and active community around its product with an online forum for support, while Bantam tools doesn't have one.

About John

Hey I'm John. I talk about CNCs and Lasers at Mellowpine. If you have any questions related to CNCs or Lasers, I'd be happy to answer them. Reach me at mail@mellowpine.com

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John

Hey I'm John. I talk about CNCs and Lasers at Mellowpine. If you have any questions related to CNCs or Lasers, I'd be happy to answer them. Reach me at mail@mellowpine.com

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