I acquired an old Craftsman lathe with a 1/2 horse motor, and since my greatest joy is to fool around with the tools themselves, before I have even turned anything with it, I am planning to switch out the motor to a 1 horse that I’ve had around the shop for some time. Same rpm and I can rig the mounting, but here is my problem. The 1 horse is fan cooled, and seems to draw air in through a metal grill on the back and to blow it out through a gap around the perimeter of the rear cover. I assume then that this is not a TEFC motor. I know that dust is the enemy of a motor like that, and I need to filter the air intake, but keep as much air flow as possible for cooling purposes. I am considering a simple cotton fabric that can be velcro’d in place and removed for cleaning, or cutting out a portion of a cleanable aid conditioner filter and fitting that on, or whatever else makes sense.
Any suggestions as to what would sufficiently filter the dust to protect the motor, but also permit the most air flow to prevent over heating? Thanks in advance –
Replies
Sounds like a TEFC motor to me. TEFC motors have both an internal and external fan. External fan is located on rear of case with air discharge around perimeter of case. Discharged air sweeps down length of case, helping to cool motor. By adding any cover, you will starve motor of cooling air.
Ahhh - you are describing precisely the type of "rear fan" system I see and which led to me (erroneously) conclude it was NOT TEFC. Thanks for the great news that the motor may in fact be TEFC. I definitely cannot see the windings when I look into the back grill. I checked the plate, but it is a bit scraped up and only partially legible. An old Dayton. I did not see the phrase TEFC on it. I'll check that out.
TEFC = Totally Enclosed Fan Cooled - If you can see any of the guts it's not a TEFC. Could be an open drip-proof motor. Heat will will probably kill a motor faster than dust so I'd leave it open.John O'Connell - JKO Handcrafted Woodworking
The more things change ...
We trained hard, but it seemed that every time we were beginning to form up into teams, we would be reorganized. I was to learn later in life that we tend to meet any new situation by reorganizing; and a wonderful method it can be for creating the illusion of progress while producing confusion, inefficiency, and demoralization.
Petronious Arbiter, 210 BC
Dust is not the enemy of a motor. It's just sawdust, and motors are designed to work with that. Like others say, I'd leave it uncovered.
I agree with none.
Sounds like a TEFC motor. On a regular motor you can look inside the grill and see the windings. Also larger TEFC motors have heatsink looking cooling fins around the exterior.
Mike
Don't worry about spelling, what I want is a capitalization checker. Had to go back and capitalize "D" in word "don't. This computor should be smart enough to know when to use capital letters. I think the problem may be a loose nut-at the keyboard.
Yes it is surly the "keyboard operating device" that is the problem :-)Mark
Measure it with a micrometer, mark it with chalk, cut it with an ax.
Ha ha, To tell the truth I just don't care very much about spelling. If something is importaint I use spell check. But to use the spell check built into this forum I have to disable my Norton firewall thing. And again, I really don't care very much.
Mikeplease excuse my spelling.
look at the plate on the motor. I bet it says TEFC on the hp and voltage plate.....
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