R8 spindle (Includes R8 to 33JT drill chuck arbor, but no drill chuck)
Chris' Tips DISCONTINUED - This HiTorque Mini Mill has been replaced by the 3990 HiTorque Mini Mill, Solid Column with Air Spring.You can compare the specifications for our mills.Mini-Lathe.com has a review of our solid column mill.The solid column is much more rigid than the tilting column.
Some people may feel that the tilting column is a feature, but I have used a mini mill for 10 years and never tilted the column on purpose. Let's compare the LittleMachineShop.com Solid Column HiTorque Mini Mill to mini mills with a tilting column.
The tilting column on other folk's mini mills tilts 45 degrees from side to side. This has several advantages. First, it is possible to make some angled cuts. It's also easy to tram in the X-axis. One user (and only one) has described to me a cut that was impossible to make any way but using a tilting column.
This mill has a solid column. While it is harder to tram in the X-axis because you must use shims, it is not as easy to knock it out of tram as the tilting column mini mill. The solid column has thicker walls than the tilting column, and a stiffer joint where it joins the base, so the column is significantly more rigid than the tilting column.
LittleMachineShop.com no longer sells mills with a tilting column. That is an indication of how much better the solid column is.The LittleMachineShop.com HiTorque Mini Mill does not come with a drill chuck as many other mini mills do. That's because the drill chucks provided by the factory do not meet our quality standards (read: they're junk). We had them put the value of the drill chuck into other parts of the mill, like the large X-Y table that is unique to LittleMachineShop.com.
Get one of these drill chucks and you will be in business.Here are data sheets for the machines that we sell.Here's what you need to convert the HiTorque Mini Mill to CNC. (But be sure you look at the CNC milling machines that we sell before you start).Here are the user's guides for our machines.
500 Watt output spindle motor
Large X-Y table
R8 Spindle for wide tool availability
Solid column that does not tilt
Dovetail column maintains head alignment at any height
Fine feed on Z-axis for precise control
Three radial handles for drilling
E-stop safety power switch
Adjustable Z-axis stop for repetitive drilling
Neoprene bellows protect horizontal ways
Adjustable gibs on all dovetail ways
Includes R8 to 33JT drill chuck arbor (no drill chuck)
End Milling Capacity
0.6" (16 mm)
Face Milling Capacity
1.2" (30 mm)
0.5" (13 mm)
18.1" x 4.7" (460 mm x 120 mm)
3 slots 0.47" (12.0 mm) wide
11.8" (300 mm)
5.1" (130 mm)
9.8" (250 mm)
6.5" (165 mm)
X- and Y-Axis Feed Screws
0.062" (1.59 mm) per rotation
0.0004" (0.010 mm)
0.67 hp (500 Watts)
100 - 2500 RPM
120 V 60 Hz 8 Amps
124 lbs (56 kg)
Base Dimensions (W x D)
8.5" x 14.2" (216 mm x 362 mm)
Mounting Holes Center to Center (W x D)
7.00" x 11.88" (177.8 mm x 301.6 mm)
Overall Dimensions (W x D x H)
23.2" x 19.7" x 29.1" (590 mm x 500 mm x 740 mm)
161 lbs (73 kg)
Crate Dimensions (W x D x H)
23.6" x 24.8" x 27.0" (600 mm x 630 mm x 685 mm)
3990 HiTorque Mini Mill
Solid Column Rigid Base
Back View Solid Column Rigid Base
The solid column on the left, tilting column on the right. The solid column has significantly thicker walls
The HiTorque Mini Mill comes with the following:
Mini Mill Users Guide written by Chris Wood
Two T-slot nuts
Two end wrenches
Four hex (Allen) wrenches
One spanner wrench
Oil can (plastic)
One 1/2" drill chuck and R8 arbor
This product works with these LittleMachineShop.com products:
These machines ship by truck because they are simply too heavy and bulky for UPS Parcel Service. We normally ship truck orders a day or two after we receive the order. We add the following shipping cost to your order total:
Other Continental US
Delivery to commercial address
Delivery to school or secured location
Delivery to freight terminal
Delivery to residential address (includes liftgate)
"Far West" refers to ten western states: CA, OR, WA, AZ, NV, ID, UT, NM, CO, WY.
For delivery to Alaska, Hawaii, or Puerto Rico, we will check with several trucking companies to get the best price and then call for your approval before we ship.
For Canadian shipments we will provide an all-inclusive quotation for shipping, brokerage, and taxes. The brokerage fees are $108. The taxes vary by province. If you have a customs broker or want to self-clear customs please let us know.
We ship machines only to the US and Canada.
The shipping charges shown above cover the cost of shipping the machine and anything else that you purchase with it, including a second (and third) machine, up to 700 pounds total.
A "commercial address" has a company name, a public entrance and posted hours of operation. If you do not have a forklift or loading dock at your place of business, you must add the liftgate fee. If you are running a business at your residence without a public entrance and posted company name and hours of operation it is considered a residence and a not commercial address.
Schools, colleges, universities, university hospitals, military bases, government facilities and other secured locations are charged a limited access fee that is included in the amounts in the chart above.
If you choose Terminal Pickup, and there is not a terminal within 30 miles, we will confirm with you that you still want Terminal Pickup.
Liftgate service is included in the residential delivery fee. The trucking company will call you to schedule the delivery.
We offer inside delivery which gets the machine inside one doorway or into your garage:
Other Continental US
Gets the machine inside 1 threshold Includes liftgate service