Grizzly Industrial G4003G Metal Lathe with Stand 12x36 in
- 12 inch swing, 36 inches between centers
- 1-9/16 inch (40mm) spindle bore, D1-5 camlock, MT#5
- 9 speeds, 70 to 1400 RPM from a gearhead
- 2 HP, 220V single-phase motor, 8.5A
- 4-112 TPI and 0.2-4.5 metric threading, left-hand too
- 6 inch 3-jaw and 8 inch 4-jaw chucks, 10 inch faceplate
- 1253 lb machine, heavy-duty steel stand included
- 67-1/2 x 26 x 54-1/2 inches overall
Updated 20 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A gunsmithing-ready lathe with a large spindle bore, outboard spider and full threading range on a heavy stand. It needs a single-phase circuit at the rated voltage and serious rigging to move into place.
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ASIN: B000M630HCModel: G4003GCategory: Metal Lathes
Overview
Hobby gunsmiths stepping up to a serious metal lathe get a gearhead machine on its own steel stand, with a spindle bore and spider mount that support long workpieces through the outboard end. The tailstock clamps with a torque wrench at a set torque for repeatable alignment.
Through-spindle work on long stock is the reason to choose this machine, backed by NSK bearings and a spider that steadies the outboard end. Threading covers inch and metric pitches plus left-hand cuts. Its mass and dedicated electrical needs make it a permanent shop fixture.
Who it's for
Aspiring gunsmiths and machinists who turn long workpieces through the spindle get the features gunsmithing calls for. Shops without the right power supply or a way to rig a machine of this mass should look at a benchtop model.
Pros and cons
- Large spindle bore with outboard spider support
- NSK spindle bearings
- Inch, metric and left-hand threading
- Torque-wrench tailstock lock for repeat alignment
- Requires a 220V single-phase circuit
- Very heavy to deliver and position
- Listing weights disagree across sections
- Warranty excludes consumables
Performance notes
Finish and accuracy come from spindle rigidity, which the NSK bearings and heavy stand support, and from running a speed matched to the material. The gearhead changes speed by gear selection, and the torque-set tailstock lock repeats its alignment between setups and operators.
Specifications
| Brand | Grizzly Industrial |
|---|---|
| Model | G4003G |
Frequently asked questions
How is the Grizzly G4003G installed?
It comes with a heavy-duty steel stand and a U.S.-written manual that covers assembly and maintenance. Plan rigging for a machine of over a thousand pounds and a 220V single-phase supply.
Can the G4003G turn long workpieces through the headstock?
Yes. The spindle bore and spider mount system are designed to support long workpieces that extend through the outboard end of the spindle.
Is the Grizzly G4003G only for gunsmithing?
No. Grizzly calls it a gunsmithing lathe for its NSK bearings, spindle bore and spider, but it is a full 12 x 36 metal lathe for general turning and threading.
What does the Grizzly G4003G warranty cover?
A 1-year warranty covers parts and factory defects; consumables are not covered.