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Q: I'm confused by the claim this grinder 3/4 horse power. A 4.4 amp,120vac induction motor is 1/6 hp per various engineering charts and 3/4 hp 13 amps??

Horsepower is often used to compare electric, internal combustion, and hydraulic power, but you can't really convert one to the other without considering the load and duty cycle. 4.4 amps in a 120VRMS circuit is 528W of electric power. 750W is 1 hp... again, in electric power. So from the power company's point of view, it's a 3/4 hp motor (528/750=0.7, close enough). Throw in power factor, efficiency, and delivery loss and you are probably down to half a hp or so of mechanical power.. but certainly not as little as 1/6. From an engineer's point of view, it makes a big difference if you're going to power a chemical mixer for 12 hours at full load or sharpen a lawnmower blade for four seconds and then let the motor cool for thirty seconds.

Q: What is the size of the retaining nut that secures the grinding wheels on this unit? 1" is too small. 1-1/16" too big. Is it metric?

1 1/16 socket will work if you don’t have 26mm

Q: Is the tool rest adjustable to any angle?

Yes, it is adjustable but it needs a better way to loosen and tighten it, other than using open-end wrenches. I have seen other models that use a clamping style closure and after 3 years I think I'll weld up my own to match theirs.

Q: Is possible to remove one wheel to attach another wheel?

DW758 - use only wheels that measure 8" (200 mm) in diameter. This tool has 5/8" (16 mm) arbors on each side. These are specifications for the DW758 GRINDING WHEELS MAX. SAFE SPEED 7/8" (22 mm) & 1" (25 mm) Face, 8" (200 mm) dia. 60 grit medium grinding wheel 3600 RPM 7/8" (22 mm) & 1" (25 mm) Face, 8" (200 mm) dia. 36 grit coarse grinding wheel 3600 RPM BUFFING WHEEL 5/8" (16 mm) arbor, 8" dia. cotton buffing wheel 3600 RPM WIRE WHEEL BRUSHES 5/8" (16 mm) arbor, 5/8" (16 mm)–1–1/4" (32 mm) Face, 8" (200 mm)dia. 3600 RPM

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Description

⚙️ Grind smarter, not harder — power and precision in one sleek package!

SMOOTH OPERATOR - Rear exhaust ports reduce heat and dust, keeping your workflow clean and efficient.
WORKSPACE OPTIMIZED - Precision-machined aluminum tool rests for exact positioning and flawless results.
SPEED MEETS PRECISION - 3,600 RPM motor enables rapid material removal without sacrificing control.
POWER THAT MEANS BUSINESS - 3/4 HP induction motor delivers relentless industrial-grade grinding power.
BUILT TO OUTLAST THE GRIND - Rugged cast iron base and motor housing ensure unmatched durability and stability.

The DEWALT DW758 8-Inch Bench Grinder features a robust 3/4 HP induction motor running at 3,600 RPM, housed in a durable cast iron frame designed for heavy-duty industrial grinding. With precision tool rests, rear exhaust ports for smoother operation, and a wide 12.5-inch wheel spacing, it’s engineered for large, precise grinding tasks that professionals demand.

Specifications

Manufacturer	DeWalt
Part number	DW758
Item Weight	220 g
Product Dimensions	45.09 x 32.08 x 27.31 cm; 220 g
Item model number	DW758
Size	8"
Color	Yellow, Black, Gray
Style	Bench Grinder
Finish	Brushed
Material	Cast Iron
Pattern	Solid
Shape	Rectangular
Power source type	Corded Electric
Horsepower	3600 RPM
Torque	1400 Inch Pounds
Item Package Quantity	1
Head Style	Flat
Measurement System	Metric
Grit Description	Coarse
Special Features	quiet
Included components	60 Grit Wheel \| Eye Shields \| Spark Deflectors \| Tool Rests \| 36 Grit Wheel
Batteries Included?	No
Batteries Required?	No

Have a Question? See What Others Asked

I'm confused by the claim this grinder 3/4 horse power. A 4.4 amp,120vac induction motor is 1/6 hp per various engineering charts and 3/4 hp 13 amps??

What is the size of the retaining nut that secures the grinding wheels on this unit? 1" is too small. 1-1/16" too big. Is it metric?

Is the tool rest adjustable to any angle?

Is possible to remove one wheel to attach another wheel?