Question 1

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??

Accepted Answer

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.

Question 2

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?

Accepted Answer

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

Question 3

Is the tool rest adjustable to any angle?

Accepted Answer

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.

Question 4

Is possible to remove one wheel to attach another wheel?

Accepted Answer

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

ASIN	B0000224J4
Brand Name	DEWALT
Customer Reviews	4.7 4.7 out of 5 stars (2,470)
Global Trade Identification Number	00028875075800
Horsepower	0.75 Horsepower
Item Weight	0.22 Kilograms
Manufacturer	Dewalt
Manufacturer Part Number	DW758
Material Type	Cast Iron
Model Number	DW758
Power Source	Corded Electric
UPC	028875075800

8" 3/4HP BENCH GRINDER

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