The short version: if you want to learn real machining at home without industrial power, industrial floors, or industrial money — and you want a machine that can grow from hand-cranked first cuts all the way to a probing, tool-changing CNC — the G0704 is the best-supported path there is. We know, because building that path is what we do.
Why the G0704 is the right starting point
The Grizzly G0704 is a 7″ × 27″ benchtop mill/drill that hits a rare sweet spot. It’s real iron — a cast-iron bed mill with a moving head for the Z axis, the same architecture as a full-size VMC, and it cuts steel, not a router pretending to be a mill. It runs on ordinary 110V garage power. It uses an R8 spindle — tooling is cheap and abundantly available. (R8 alone isn’t ideal for CNC tool changing, but straight-shank repeatable holders and a power drawbar make that a non-issue — more on that below.) And it’s small enough to live on a bench, but big enough to make parts you’d actually put on a machine, a car, or a product.
Just as important: the G0704 has one of the largest owner communities of any benchtop mill. Every question you’ll ever have has been asked, answered, filmed, and argued about — and when you’re learning, that community is worth more than any spec.
One more beginner-friendly truth: this machine is hard to hurt. With its modest axis power, a crash usually just stalls a motor rather than breaking anything — you get to learn from the mistakes that would genuinely damage a big, high-powered machine.
Quick specs
| Table size | 7-1/16″ × 26-5/8″ |
| Table travel (X) | 18-7/8″ |
| Cross travel (Y) | 6-7/8″ stock (extendable to ~9.5″ — see upgrade path) |
| Spindle taper | R8 |
| Spindle travel (quill) | 2″ |
| Spindle to table (max) | 13″ |
| Motor | 1 HP DC variable speed, 110V (see notes on real-world power below) |
| Spindle speeds | 50–1,125 RPM (low) / 100–2,250 RPM (high), stock |
Full details in Grizzly’s owner’s manual (PDF).
The honest part: where the G0704 falls short out of the box
We sell upgrades for this machine, so take this with whatever salt you like — but every G0704 owner learns the same lessons, usually in this order:
- The stock gear drive is loud, fragile, and slow. The factory drivetrain runs through gears that whine at speed and are famously the machine’s weak point. It also caps your usable spindle speed well below what small end mills want.
- It needs tramming when it arrives. Like every machine in this class, the column and head need to be squared to the table before your parts come out square. It’s a learnable afternoon job — our installation guide includes the full tramming procedure free, whether you buy anything or not.
- Spindle bearings are built to a price. Factory bearings are fine for drilling; you’ll feel their limits in surface finish and tool life once you start milling in earnest.
- Y travel is tight. The stock 6-7/8″ of cross travel is the wall you’ll hit first — it shrinks the real working envelope well below what the long table suggests. Our spindle kit’s extended-Y option opens it up to roughly 9.5″, a significant increase in working envelope.
- The stock motor gives up long before the frame does. The factory “1 HP” DC motor is rated optimistically — it is nowhere near the real-world equivalent of a true 1 HP 3-phase AC industrial motor, and the castings can handle far more cut than it can push. The upgrade path removes that ceiling: our kit supports industrial 3-phase AC spindle motors, and the step up to a 1.5 HP 3-phase is a mesmerizing difference in capability.
None of these are reasons to avoid the machine. They’re the reasons it costs what it costs — and every one of them has a proven fix, which brings us to the fun part.
The upgrade path: from first cuts to full CNC
This is what makes the G0704 special. You don’t outgrow it — you upgrade it, in stages, each one unlocked when you’re ready:
Stage 1 — Tune what you have (cost: an afternoon)
Tram the column, adjust the gibs, learn the machine’s personality. Our guide covers the tramming procedure step by step with animations.
Stage 2 — Precision spindle bearings (~$100)
The Nachi precision bearing upgrade transforms surface finish and tool life. Watch the before/after runout results on the product page — the numbers speak for themselves.
Stage 3 — Belt drive, spindle & power drawbar (the big one)
The Ultimate Spindle Upgrade Kit replaces the entire noisy gear drivetrain with a smooth belt drive, adds higher usable RPM, and — the part that spoils you forever — a power drawbar for wrench-free tool changes in seconds with TTS-style holders. Quieter, faster, and the single biggest quality-of-life jump the machine can make. It also opens the door to extending the Y travel to roughly 9.5″ and to running a true industrial 3-phase AC spindle motor — even at the same nameplate “1 HP,” an industrial AC motor outworks the stock DC unit by a wide margin, and stepping up to a 1.5 HP 3-phase transforms what this machine will push through a cut.
Stage 4 — CNC conversion
The G0704 is arguably the most-converted benchtop mill in the world — ball screws, steppers or servos, and control software turn it into a genuine small machining center. Our founder develops Probe Basic, one of the most widely used LinuxCNC interfaces, so when you get to this stage you’re dealing with people who live on both sides of the machine.
Stage 5 — Probing & tool setting (work smarter)
Here’s where the stages compound: because the power drawbar runs TTS-style repeatable holders, every tool’s length is measured once — after that, tools swap in seconds with no re-measuring. Add a touch probe to find your work and a tool setter to make that first measurement automatic, and setup time simply collapses. Tutorials for both are on every product page.
Buying advice: new or used?
New: the G0704 remains in Grizzly’s catalog — check current pricing at Grizzly.
Used: excellent value if you inspect before you pay. Run the spindle and listen (bearing growl is a negotiating point — and a $100 fix, see Stage 2). Check the ways for rust or gouges, feel each axis for backlash, and confirm it actually runs. A used G0704 that’s merely neglected is a bargain — nearly everything on these machines is fixable or upgradeable.
Clones: the G0704 shares its bones with several imports (BF20-family machines). Our kits fit the G0704 and its rear-mounted-column variants — send us a photo of your machine and we’ll confirm fitment before you spend anything.
See what it becomes
That’s a customer’s G0704 — belt drive, power drawbar, CNC — running production parts at half its original cycle times. It started life as the same crated machine everyone unboxes.
Start where you are
Whether you’re eyeing your first mill, tuning a stock one, or planning the full conversion: browse the upgrade catalog, read the free install & tramming guide, or just ask us — helping G0704 owners get more from their machines is the entire reason this shop exists.