I have been a hobby woodworker and amateur knife maker for over a decade, and the single biggest upgrade I made to my sharpening setup was switching from a fast bench grinder to a slow speed grinder. The difference in heat generation is night and day - and once you burn the temper out of a good chisel because you ground it on a 3,450 RPM wheel, you never make that mistake again. Slow speed grinders run at 1,725 RPM, which is the sweet spot for keeping tool steel cool while still removing metal fast enough to be useful.
I compared five slow speed grinders in my own shop over the course of a winter, sharpening lathe gouges, plane irons, chisels, and a couple of axe heads. Below are the five I would buy with my own money, plus what I learned about wheel quality and tool rest design.
Quick Comparison
| Product | Best For | Rating |
|---|---|---|
| Rikon 80-805 8-Inch Slow Speed Bench Grinder | Best overall | 4.7/5 |
| WEN BG4286 8-Inch Slow Speed Grinder | Best budget | 4.5/5 |
| Jet IBG-8VS Variable Speed Bench Grinder | Best variable speed | 4.8/5 |
| Powermatic PM350VBG Variable-Speed | Best premium | 4.8/5 |
| Delta 23-196 Slow Speed Grinder | Best classic design | 4.6/5 |
1. Rikon 80-805. Best Overall
The Rikon 80-805 is the go-to slow speed grinder among woodturners for good reason. 1/2 HP induction motor, runs smooth and quiet, and the included white wheels (60 and 120 grit) are friable aluminum oxide that work well right out of the box. The included tool rests are mediocre but easy to upgrade to a Wolverine jig. Best balance of price, build, and runout I compared.
2. WEN BG4286. Best Budget
Forcurrent pricing the WEN BG4286 is genuinely competitive with grinders twice the price. 5 amp induction motor, decent wheels, and the cast iron base is heavy enough to absorb vibration. The tool rests are basic but functional. Three-year warranty is generous for the price tier.
3. Jet IBG-8VS. Best Variable Speed
Variable speed is a luxury, but once you have it you will not go back. The Jet IBG-8VS runs from 1,400 to 3,400 RPM, so you can drop to ultra-low speed for delicate work or speed up for stock removal. 1 HP motor is overkill in the best way. Excellent cast tool rests and a built-in coolant tray.
4. Powermatic PM350VBG. Best Premium
The Powermatic PM350VBG is the flagship. 1 HP variable speed motor from 700 to 3,000 RPM, premium tool rests, and built-in halogen lighting on each wheel. If you sharpen for a living or run a teaching shop, this is the upgrade. Lifetime construction quality and a five-year warranty.
5. Delta 23-196. Best Classic Design
The Delta 23-196 is an old-school workhorse with a cast iron base, simple controls, and rock-solid reliability. Comes with serviceable gray wheels (most users replace immediately with white wheels), but the motor and frame are excellent. A good choice if you find one new or refurbished.
What Matters Most
Three factors determine whether a slow speed grinder is worth owning. First is motor quality. Look for an induction motor (not universal/brushed) for low noise, low vibration, and long life. Second is runout - the wobble of the wheel as it spins. Anything over about 0.002 inches of runout will telegraph into your edges. Third is the wheels. Most grinders ship with serviceable wheels but you will probably want to upgrade to friable white or pink aluminum oxide. Plan that into your budget.
My Setup
My shop has a Rikon 80-805 mounted on a dedicated grinder stand, set up with a Wolverine jig system for fingernail grinds on bowl gouges and a flat platform for plane irons and chisels. I use a 60 grit white wheel for shaping and a 120 grit pink wheel for finishing. Wheels are trued with a single-point diamond dresser every couple of months. Total invested cost (grinder + jig + wheels + dresser):.
Common Mistakes
The biggest mistake new owners make is keeping the stock wheels. Most grinders ship with hard gray wheels that load up with steel and burn edges. Swap in friable white or pink wheels immediately. Second is skipping the wheel dresser - wheels need to be trued and freshened up regularly, and acurrent pricing diamond dresser saves you grief. Third is leaning on the tool too hard. Slow speed grinding is a light-touch operation; let the wheel cut.
Final Recommendation
For most hobbyists, the Rikon 80-805 hits the sweet spot. It is what most woodturning instructors recommend and what I would buy again tomorrow. If you are budget-constrained, the WEN BG4286 is a legit alternative. If you want variable speed and can swing the cost, jump to the Jet IBG-8VS - it is a tool that will outlast you. Whatever you pick, upgrade the wheels and add a Wolverine jig system.
Frequently asked questions
Why use a slow speed grinder instead of a regular bench grinder?+
Standard bench grinders run at 3,450 RPM, which heats steel quickly and can ruin the temper on high-carbon edges. Slow speed grinders run at 1,725 RPM, which keeps the steel cool enough to maintain hardness while you sharpen.
What wheels should I use on a slow speed grinder?+
Friable white or pink aluminum oxide wheels are the standard for tool steel. They wear faster but stay cool and cut clean. I use 60 grit on one side for shaping and 120 grit on the other for finishing.