Choosing a milling vise starts with jaw width and workspace. The vise is the middleman between your stock and the cutter, so the decision affects which parts you can clamp securely. The 6-inch Machine Vise and the 4-inch Precision Vise sit at opposite ends of that spectrum: one is a wide bench clamp, the other is a compact locking vise. If you work with broad stock, the larger jaw opening is the natural draw. If you prefer a smaller unit, the 4-inch option keeps the initial footprint down.
Quick verdict
For wide stock and a substantial base, choose the 6-inch Machine Vise. For smaller jobs, choose the 4-inch Precision Vise. Both list as new.
Head-to-head comparison
| Model | Listed price | Jaw width | Key specs | Price bar |
|---|---|---|---|---|
| 6-inch Machine Vise | USD 91.10 | 6 in | HT250 gray cast iron body, 59.4 lb, 5.9-in opening | |
| 4-inch Precision Vise | USD 56.17 | 4 in | Cast iron body, 19 kN max clamping force, 4-in opening |
Where each wins
The 6-inch Machine Vise wins on jaw capacity and heft. The 59.4-pound overall weight points to a substantial body, and the 45# steel jaws are specified alongside the HT250 gray cast iron body. Both vises use cast iron in the body, so material alone is not the differentiator.
The smaller Precision Vise wins on jaw size and compact form. Its 19 kN max clamping force gives a concrete sense of the grip it can apply to smaller workpieces.
Product notes
6-inch Machine Vise Precision CNC Milling Machine Bench Clamp Vice Lock Vise
This is the larger workholding option at USD 91.10. With 6-inch jaws and a 5.9-inch jaw opening, it is aimed at jobs where wide stock needs to be held across a longer clamping surface. The listed construction uses HT250 gray cast iron for the body and 45# steel for the jaws. You also get a 59.4-pound overall weight, which makes it a stable bench presence but also a heavier piece to handle. If your workpieces regularly exceed 4 inches, this is the vise that gives you the opening to handle them. The trade-off is the higher listed price and the physical weight.
4-inch Precision Vise Lockdown CNC Milling Machine Vise Clamping Vice Plier Milling
This is the more compact, lower-priced listing at USD 56.17. The 4-inch jaw width and opening capacity set a clear boundary, and the 19 kN max clamping force gives you a number to compare against your usual clamping needs. The body is cast iron, and the stationary base motion keeps the setup simple. If your typical milling or drilling workpieces fit within 4 inches, this vise offers a lower listed price. The limitation is that its 4-inch opening will not take larger stock than the 6-inch vise can accommodate.
Final choice by use case
Start with the workpiece. A wider jaw gives you a longer clamping path and a heavier, more substantial vise, which suits broad stock. If the work you clamp fits within a compact opening, the smaller vise offers a tidy setup on the bench.
