Thats the main reason for having the reverse on the motor, it's a lot
easier to get at the backside of a tool by using both sides of the
wheel. but you always want the wheel to be going down into the tool.
Typically we use a SiC green wheel on one side and a diamond wheel on
the other. This is assuming you are only doing Brazed carbide tools. If
you are doing HSS then a coarse alum oxide(grey or black) and a fine
white alum oxide on the other for finishing.
A good idea is to make a diamond dresser to run in the table slot to
true up the wheels. gives you a nice flat surface on the SiC and AlO
wheels(not on the diamond)
here is a link to the original baldor version, much more expensive :-)
> For one thing, it allows you to grind on the BACK side of the wheel
> (face), which is easy since the table covers the entire width of the
> wheel. This may be desirable with some tooling, as more of the table
> surface may be available for holding or steadying the workpiece, or
> keeping it against the miter gauge.
> I've not had this type grinder long enough (five days) to decide how
> useful that may be.
> Dan Mitchell
>>>>Harbor Freight has a tool and cutter grinder on sale for $119.95. It
>>>>has two tiltable tables, and is set up to spin two face mounted
>>>>silicon carbide stones. It probably weighs in at 60 lbs. Heavy.
>>>>Motor is reversable, 1/2 horsepower.
>>>>Anyone been brave enough to try one of these? Sale lasts until the
>>>That isn't really a "tool and cutter grinder". A real tool and cutter
>>>is a very different machine. That thing is mainly useful for touching up
>>>lathe bits and other single point tools. It is not suitable for sharpening
>>>end mills, dovetail cutters, Tee slot cutters, etc.
>>>I bought the one sold by J&L Industrial a couple of years ago (their
>>>price was $159). It is basically a Chinese copy of the Baldor, at about
>>>1/5th the price. It accepts the same plate wheels as the Baldor. Mine
>>>has plenty of power for its intended uses, is very quiet, and takes
>>>*minutes* to coast to a stop. In other words, the bearings seem to be
>>>pretty good. (I tested this in the store before buying it.)
>>>The wheels that came on mine were white aluminum oxide, and they
>>>seemed pretty decent for Chinese wheels. But mine is not reversible,
>>>and has a 1 hp (nameplate) motor. If the HF machine is reversible,
>>>that's a plus, and if the 1/2 hp is honest, it may be enough. If you
>>>can find one at a HF store and hear it run before you buy it, that
>>>would be very helpful. It should be smooth, quiet, and have a very
>>>long coast down time. If it doesn't, pass.
>>What is the purpose of the grinder being reversible? What
>>can you do with it running in reverse that you cannot do with
>>it running in the forward direction?