Little Machine Shop HiTorque 3990
#8 in Mini millsFull review
For a hobbyist machining small parts in aluminum, brass and light steel who wants a quiet, well-supported mini mill.
Little Machine Shop $1,449 eBay$1,449
The Little Machine Shop HiTorque 3990 is the better milling machine overall, rated 2.8 to 2.6. The Little Machine Shop HiTorque 3990 leads on price. The Little Machine Shop HiTorque 6450 wins on features. The Little Machine Shop HiTorque 3990 costs $1,050 less ($1,449 vs $2,499).
Prices were last checked November 4, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases. As an eBay Partner, we may be compensated if you make a purchase.
Little Machine Shop HiTorque 6450
#9 in Mini millsFull review
For a hobbyist who wants a mini mill ready to cut to the thousandth, with the readout installed and set up.
Little Machine Shop $2,499 eBay$2,499
Which should you buy?
- Choose the Little Machine Shop HiTorque 3990 for price ($1,449 vs $2,499).
- Choose the Little Machine Shop HiTorque 6450 for features (R8 spindle, digital readout, brushless motor, variable speed vs R8 spindle, brushless motor, variable speed).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every mini mills milling machine; a clear win is highlighted. How we rank explains each one.
| Factor weight | Little Machine Shop HiTorque 3990 | Little Machine Shop HiTorque 6450 |
|---|---|---|
| Overall rating | 2.8/5 | 2.6/5 |
| Price 25% | 60 $1,449 | 15 $2,499 |
| Table size 20% | 10 4.7 x 18.1 in table (85.1 sq in) | 10 4.7 x 18.1 in table (85.1 sq in) |
| Motor 15% | 25 500 W motor | 25 500 W motor |
| Features 30% | 55 R8 spindle, brushless motor, variable speed | 75 R8 spindle, digital readout, brushless motor, variable speed |
| Warranty 10% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| Little Machine Shop HiTorque 3990 | Little Machine Shop HiTorque 6450 | |
|---|---|---|
| Capacity | ||
| Table | 4.7 x 18.1 in | 4.7 x 18.1 in |
| Longitudinal (X) travel | 11.8 in | 11.8 in |
| Cross (Y) travel | 5.1 in | 5.1 in |
| Head (Z) travel | 10.6 in | 10.6 in |
| Quill travel | 2.8 in | 2.8 in |
| Spindle and motor | ||
| Motor | 500 W (0.7 hp) | 500 W (0.7 hp) |
| Motor type | Brushless DC, belt drive | Brushless DC, belt drive |
| Brushless motor | Yes | Yes |
| Spindle speeds | 100 to 2,500 rpm | 100 to 2,500 rpm |
| Variable speed | Yes | Yes |
| Spindle taper | R8 | R8 |
| Head tilt | None | None |
| Features | ||
| Power feed | No | No |
| Digital readout | No | Yes |
| Weight | 124 lb | 187 lb |