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EddyCurr
03-11-2010, 01:41 PM
Can someone confirm that it should not necessary to remove the
arbor (spindle) nut to remove/replace grinding wheels on a 6" Carbide
Tool Grinder such as the Harbor Freight #46727-0VGA.

There is no guidance offered in the HF manual about wheel R&R. However
a manual for someone else's product states never to loosen or remove
the arbor nut on their machine.

An OEM SiC wheel on the HF machine remains tight to the shaft after
removal of four hex socket head shoulder bolts. Brief attempts to
loosen with gentle levering with wooden wedges between the housing
and the backing plate of the wheel were unsuccessful - force here
seems likely to ruin the SiC wheel.

There are four tapped holes in the b-plate on the same circumference
as the mounting holes for the shoulder bolts. Could these be intended
as locations for 'pusher bolts' to bear against the motor housing and
extract the wheel from the arbor adapter?

.

MTNGUN
03-11-2010, 01:55 PM
Can someone confirm that it should not necessary to remove the
arbor (spindle) nut to remove/replace grinding wheels on a 6" Carbide
Tool Grinder such as the Harbor Freight #46727-0VGA..

Confirmed. Center hole in HF SiC wheel is 1.26" diameter, should clear spindle nut.

It's been a while since I changed wheels on the unit, but I think the spindle nut holds the backing plate, while the 4 screws hold the wheel to the backing plate.

EddyCurr
03-11-2010, 02:11 PM
Thanks. I already had examined the arbor nuts to determine handedness
and had made an initial unsuccessful attempt to loosen them. When they
didn't break free with a moderate effort, discretion and research seemed
more appropriate than further force.

While few have had kind words for the OEM wheels on these grinders,
I would prefer to remove them without breakage - point of honour,
if nothing else.

.