Question 1

How does this one compare to Jets other grinder, model 577102 which spec wise seems identical except the color?

Accepted Answer

This one is built to a much higher standard. 1) The wheel flanges on this grinder are large and machined, 577102 has cheap, smaller, stamped steel flanges. What does that mean? The wheels will always run truer on this grinder. 2) The motor on this grinder  is another league compared to 577102, equal written specs don't always mean equal performance or durability. This Grinder while pre-wired to run off 120 volts, can also be set up to run off 220 volts. That means longer motor life and easier starting when operating it at 220 volts. The 577102 is strictly 120 volt,. 3) There is the exhaust ports, the ones on this one exit in the back/side toward the center of the grinder to a "T" the 577102 has an oval exit behind each wheel. That means this one is allot easier to hook up to dust collection equipment the longer port length also lessons sparks catching anything on fire. You can look at the two manuals on Jet's website and it spells things out with pics too. 4) Lastly is the switch this grinder has a more expensive removable lock out, 577102 has a cheap toggle switch. This grinder is also OSHA approved for industry where 577102 is not, most likely because of the power switch, OSHA's picky about power switches, they must be large, red and easy to access and lock out.

Question 2

What is the RPM of this grinder?

Accepted Answer

The listed RPM is 3600 @ 60hz 11 amp @ 115V, 5.5 amp @ 230V should you change the setup over to 230V, it comes setup for 115 operation, easy to follow their manual to change the wiring setup to 230.  I was going to but didn't bother because this grinder is a beast @ the 115V.  I use it with a VanSant MultiTool Belt grinder attachment for steel & other metal fabrication, finishing edges, deburring, and some shaping.  Also use the 60 grit on the other side of the grinder for assorted grinder tasks. It comes up to speed almost immediately and so far has not bogged down on anything I've done wit it.   Great machine so far not a complaint..!  This unit is a Made in Taiwan machine vs a mainland republic of China unit.  Hope this helps!

Question 3

What is shaft size?

Accepted Answer

The bench grinder has a 5/8" shaft diameter.

Question 4

Is this a variable speed or single speed?

Accepted Answer

This is a single speed motor, smooth and powerful

ASIN	B01C9TW340
Best Sellers Rank	#365,032 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #49 in Power Bench Grinders
Brand	Jet
Brand Name	Jet
Color	Gray
Customer Reviews	4.8 out of 5 stars 266 Reviews
Global Trade Identification Number	00731325242621
Horsepower	1
Included Components	Grinder, 36-Grit Wheel, 60-Grit Wheel, Spark Guards, Eye Shields, Tool Rests, Hardware
Item Dimensions L x W x H	21.1"L x 13.8"W x 13.9"H
Item Type Name	Industrial Bench Grinder
Item Weight	44 pounds
Manufacturer	JET
Manufacturer Part Number	578008
Manufacturer Warranty Description	2 Year
Material	Alloy Steel, Cast Iron
Material Type	Alloy Steel, Cast Iron
Maximum Rotational Speed	3600 rpm
Model Number	IBG-8
Number of Items	1
Power Source	Corded Electric
Product Dimensions	21.1"L x 13.8"W x 13.9"H
Style	Industrial Bench Grinder
Style Name	Industrial Bench Grinder
UPC	731325242621
Unit Count	1 Count
Voltage	115 volts
Wattage	745.7 watts

JET 8-Inch Industrial Bench Grinder, 3600 RPM, 1 HP, 115V 1Ph (IBG-8)

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