[TheForge] OT -12v motors

[Jerry Frost]

Rotating shafts or any narrow tooling is indeed really dangerous. It's easy 
to take it too lightly and get careless. Drill bits in drill presses 
grabbing a hank of long hair are one of the most common tales of woe I know 
of. Heck, getting caught in the tooling of a rotary earth drill is almost 
always a death sentence of a most grissly manner. We had posters with pics 
of guys who'd gotten wrapped up in rotary tools in the drill shop, some 
pretty awful, the guy wrapped up with the cable in the winch drum was 
horrendous.

Anywho, keep clear of rotary stock. The guards like you describe are well 
worth having, anything to keep you out of the sharts.

Jer
----- Original Message ----- 
From: "Andrew Vida" <osan at netlabs.net>
To: "Blacksmithing List Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Tuesday, June 21, 2011 9:24 PM
Subject: Re: [TheForge] OT -12v motors


>
>
> On 6/21/2011 4:03 PM, Jerry Frost wrote:
>
>> Guards on rotating machinery are good ideas but I've had things come 
>> through
>> some guards and the ones nothing can get out of make it really hard to 
>> get
>> things in through meaning you are working at BAD angles of attack. 
>> Learning
>> to work out of the potential ballistic tragectory(sp?) is your best bet. 
>> As
>> an added safety measure, especially when others are in the same area is 
>> to
>> put something behind you like a locker to act as a scatter shield.
>>
>
> One of the most effective safety features come in basic design where the
> shaft is completely enclosed right to the hub.  A friend of ours in
> northern NJ, we can call him Dick, has a combination grinder/buffer of
> the 5 or 10 hp variety (not seen in a long-ish time).  The grinder side
> is just like a typical large frame pedestal grinder - short shaft
> issuing from the left side of the motor housing.  On the buffer side,
> the motor housing extends rightward at least a good 20 inches, the
> shaft/hub protruding just a few inches onto which the buffs or wire
> wheels are mounted.
>
> I have found that while the wheels themselves pose a very definite
> safety hazard, the rotating shafts are actually quite a bit more
> dangerous.  Anything catching on the shaft will rapidly wind up and pull
> in whatever is attached to the other end.  Think "farm equipment" and
> "PTO shaft".  Bare shafting is hella-scary stuff.
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