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
Best Sellers Rank	895,506 in DIY & Tools ( See Top 100 in DIY & Tools ) 136 in Bench Grinders
Brand	DEWALT
Colour	Yellow, Black, Gray
Customer Reviews	4.7 4.7 out of 5 stars (2,495)
Global Trade Identification Number	00028875075800
Horsepower	0.75 Horsepower
Included Components	8IN BENCH GRINDER
Item Dimensions L x W x H	45.1L x 32.1W x 29.8H centimetres
Item Type Name	8IN BENCH GRINDER
Item Weight	0.22 Kilograms
Manufacturer	DeWalt
Manufacturer Warranty Description	1 year full warranty.
Material	Cast Iron
Maximum Rotational Speed	3600 RPM
Model Number	DW758
Number of Items	1
Number of Packs	1
Part Number	DW758
Power source	Corded Electric
Style	Bench Grinder
UPC	028875075800
Unit Count	1.0 count

DEWALT DW758 8-Inch Bench Grinder

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