A Dual-Speed Bench Grinder Is a Smart Choice: Laguna vs. Jet
When it comes to sharpening tools, grinding metal, or maintaining a workshop full of edged instruments, a bench grinder is a go-to workhorse. But not all grinders are created equal—and if you’re serious about tool care, a dual-speed bench grinder can make a big difference.
Let’s look at why dual-speed matters, and how the Laguna G8 Industrial Bench Grinder stacks up against a top single-speed model like the Jet JT9-577102 JBG-8A.
Why Choose a Dual-Speed Grinder?
Most traditional bench grinders run at a fixed speed—typically around 3,450 RPM. That’s fine for heavy stock removal, but it’s too fast for sharpening fine edge tools, where heat buildup can destroy the temper of your steel. That’s where a dual-speed grinder shines.
Two Speeds, Two Purposes:
- High Speed (3450 RPM): Best for grinding, shaping, and removing rust or burrs quickly.
- Low Speed (1725 RPM): Ideal for sharpening chisels, plane irons, turning tools, and other high-carbon or HSS tools without overheating them.
Whether you're a woodworker refining a bevel or a mechanic cleaning up metal parts, a dual-speed grinder gives you the control and flexibility you need.
Bench Grinder Showdown: Laguna G8 vs Jet JBG-8A
Now let’s compare two respected 8" bench grinders—one dual-speed, one single-speed.
🏆 Laguna MBGG8-001 G8 Industrial Bench Grinder
Best for: Precision sharpening and serious versatility
Speed: Dual (1725 & 3450 RPM)
Wheel Grit: 60 (shaping) & 120 (sharpening)
Build: Heavy-duty cast iron base
Extras:
- Extra-wide flat tool rests for accurate bevels
- High-quality aluminum oxide wheels
- Flexible LED work light
- Magnifying safety shields
- Diamond wheel dresser included
- Optional CBN, buffing, or wire wheels available
This is a sharpening-ready machine out of the box. The 120-grit wheel and low-speed setting are particularly suited for woodworkers and metalworkers looking for precision without overheating their tools. The robust LED light, rubber vibration-dampening feet, and magnifier-equipped shields are thoughtful touches that enhance both safety and usability.
Verdict: If you’re investing in your tools and your technique, the Laguna G8 offers outstanding control, safety, and performance, especially for those who sharpen regularly.
⚙️ Jet JT9-577102 JBG-8A Bench Grinder
Best for: Everyday shop grinding and heavy-duty performance
Speed: Single (3450 RPM)
Wheel Grit: Fine and coarse vitrified wheels
Build: Cast iron housing with dust vents
Extras:
- Adjustable tool rests
- One-piece spark guards
- Enclosed, pre-lubricated ball bearings
- Heavy-duty power switch
The Jet is a solid, high-speed grinder designed for general shop work. It’s great for shaping metal, cleaning up rusty tools, and even sharpening mower blades. The cast iron build and smooth operation make it reliable and vibration-resistant. However, the lack of a low-speed setting makes it less ideal for fine sharpening tasks. Users also mention some fiddliness with the wheel mounting nuts.
Verdict: A dependable shop grinder for general-purpose tasks, but not the best pick if precise sharpening is your top priority.
For shops that may be short on space, a cast iron JET Bench Grinder delivers work power and pristine finishes.Final Thoughts: Which One Should You Choose?
| Feature | Laguna G8 | Jet JBG-8A |
|---|---|---|
| Speed | Dual-speed (1725 & 3450 RPM) | Single-speed (3450 RPM) |
| Sharpening-Ready Setup | Yes (120-grit, low RPM, tool rests) | No (coarse wheels, high RPM) |
| Vibration Dampening | Cast iron + rubber feet | Cast iron only |
| Safety Features | LED light, magnifiers, deflectors | Spark guards |
| Ideal Use | Precision sharpening & grinding | General shop grinding |
If your main goal is to sharpen tools safely and accurately, the Laguna G8 is the clear winner. Its dual-speed motor, fine wheels, and thoughtful design features make it an exceptional choice for anyone serious about tool care.
But if you’re grinding daily in a high-volume shop and mainly doing coarse work, the Jet JBG-8A remains a durable, well-built option.
How to Use the Laguna G8 Dual-Speed Bench Grinder for Tool Sharpening
The Laguna G8 is designed to make sharpening safer, faster, and more precise. Here's how to get the most out of it:
- Select the Right Speed: Use 1725 RPM for sharpening edge tools like chisels and plane irons. Switch to 3450 RPM for aggressive grinding or material removal.
- Adjust the Tool Rest: The extra-wide flat tool rests allow you to set the correct angle for your blade or tool edge. Lock it in securely before grinding.
- Use Light Pressure: Let the wheel do the work. Excess pressure can overheat your tool and reduce control.
- Dress the Wheel: Use the included diamond wheel dresser to clean and flatten your grinding wheels regularly for better results.
- Add a CBN Wheel (Optional): For an even cooler, faster, and longer-lasting grind, upgrade to a Laguna 80-Grit CBN Wheel or a 180-Grit CBN Wheel. These are perfect for precision sharpening and require little to no maintenance.
Always wear safety gear, use the magnifier-equipped shields for better visibility, and check your wheels before each use for cracks or wear. With good technique and the right setup, the Laguna G8 can deliver near-professional sharpening results right in your own shop.
Want help choosing the right grinder for your shop?
We’re happy to help. Call our support team or browse our full collection of bench grinders, grinding wheels, and sharpening accessories at ToolsToday.com.
