I outfitted my garage with an array of lesser-used air tools from HF over the winter as coupons popped up, but didn't have the motivation to break them in with oil until last week. Anyone else have one of their air drills and notice the chuck being off center? I'm going to take the 3/8" pistol-grip, 1/2" reversible, and 3/8" 90-degree drills I bought to a machinist friend of mine to check for certain, but I think none of them are true. Not just the large collar with the gear that the key drives tight, the chuck itself. I can't tell if it's the three teeth inside the chuck or the shaft/bearings themselves, but by eye they all seem off to me. None of the other tools seem off at all, though I haven't put them to real use yet. As far as fit and finish, everything I picked up seems great.
98896 1/2" reversible air drill
http://www.harborfreight.com/air-tools/drills-screwdrivers/1-2-half-inch-reversible-air-drill-98896.html
94585 3/8" air drill
http://www.harborfreight.com/air-tools/drills-screwdrivers/3-8-eighth-inch-reversible-air-drill-with-keyed-chuck-and-key-94585.html
67474 3/8" right angle air drill
http://www.harborfreight.com/air-tools/drills-screwdrivers/3-8-eighth-inch-reversible-air-angle-drill-67474.html
52847 air die grinder (this is the tiny one) PASS
http://www.harborfreight.com/air-tools/grinders/1-4-quarter-inch-rear-exhaust-air-die-grinder-52847.html
This grinder seemed a little off-center as well as the drills, but at 20k rpm I don't see it being a problem for what I payed for it and the work I intend it to be used for. It also may have just been the cheap arbor I had been judging with.
95504 4" air grinder PASS
http://www.harborfreight.com/air-tools/grinders/4-inch-air-angle-grinder-95504.html
32940 air hammer (this is the shorter model, not "super duty") PASS
http://www.harborfreight.com/air-tools/hammers/air-impact-hammer-kit-32940.html
I can't tell the difference between this hammer and the one I use at work, not sure of the brand but it's a tool truck piece.
97187 5" air sander with Jacobs chuck (keyless chuck) PASS
http://www.harborfreight.com/air-tools/sanders/5-inch-high-speed-air-sander-with-jacobs-chuck-97187.html
I picked this up to do right angle grinder work because I rarely need all the speed an actual die grinder offers and the chuck allows me to swap out tools easier. I don't have much use for the 5" grinding discs it's meant for but who knows. The shaft, even with the removable chuck, seemed true enough for precise work, even if it spins too fast for such.
95028 Composite cutoff wheel PASS
http://www.harborfreight.com/air-tools/specialty-air-tools/3-inch-composite-air-cut-off-tool-95028.html
This is a little bulky, and more expensive than the rest of the 1/4" grinders, but it's very nice. Doesn't get cold from extended use, hardened surface under the safety to prevent wear, just a great piece of manufacturing imho. I had planned on getting all three pieces but they mysteriously pulled the right angle grinder after less than a month.
67538 multifunction air tool PASS
http://www.harborfreight.com/air-tools/specialty-air-tools/variable-speed-multifunction-air-tool-67538.html
I had put off getting into this new breed of gadgets but the price and pneumatic style of this one seemed right. The crinkle finish on the trigger and housing are great, the movement is smooth and light, the only hangup is a rare jam where it'll just bleed air at trigger press and you have to nudge the business end around so the turbine will spin again. I haven't taken it apart yet but this might be machining crud leftover in the works.
3/8" butterfly trigger impact wrench PASS
http://www.harborfreight.com/air-tools/impact-wrenches/3-8-eighth-inch-drive-75-ft-lbs-torque-compact-air-impact-wrench-93100.html
I thankfully haven't had to fix anything this month on my car but I had been wanting one of these for those frustrating buried bolts that no amount of leverage, wobbles and extensions can seem to break loose. Surprisingly smooth in operation, the trigger axle shaft is embarrassingly loose though. The chassis has to be disassembled to get it out so I'm waiting on fixing that but it's a sore point on an otherwise very decent go-to tool.