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caution just another day

Joined
Jan 20, 2006
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Location
Martinsville, VA
i was turning a small bowl today using my bowl steady on a piece of hard sycamore when i saw smoke rising up, the plastic wheels were melting, i was able to clean up the bowl and put in a call to craft supplies today

just another day turning
 
wheels

i am not really sure, i thought i snug the wheels to bowl and i tested it, the sycamore was suppose to be green sealed but it created a ton of dust, i was able to finish the bowl , it had to be dry , it was definitely hard, harder than some green locust i turned, i will check how tight the wheels go on, i had not thought about that, i'm definitely not a mechical genius, most of this stuff doing for the first time when i add equipment, read instructions try it out
any other suggestions, i'm listening
 
Yuppers. If you got smoke from the contact point between wheel and wood, the wheel was definitely frozen. Either too tight or siezed bearing. Should spin free when the piece is turning just like a wheel on pavement. If the smoke was from the bearings of the wheel, defective bearing.

Worse comes to worst, pick up a set of rollerblade replacement wheels at Wally Mart. Will cost about $15 and will probably give you 8 wheels. That's pretty much lifetime for a steady.

Dietrich
 
Let's see what kind of spin I can put on this . . . . . .

It could be possible (but not likely) that the bearings are shielded rather than being sealed on both sides, which could allow dust to mix with the grease and form mud. Another important thing is that sealed bearings have a lower maximum speed rating than shielded and unshielded bearings. If the wheels on the steady rest are placed at the outer edge of the turning, they will be running much faster than if placed closer to the spin axis of the turning. Examine the set-up of the wheels to make sure that the bearings are not being restrained from turning by a washer or bolt head that is rubbing against the outer race. Also, if the bolt through the bearing is tightened too much, it can distort the inner race to the point that the bearing will not spin freely. If all of these things check out OK, the only other thing that I can suggest is to cut back on the caffine and slow the lathe down below 5000 RPM.😀

Bill
 
I've turned enough bowls to fill a small truck.
I've never used a bowl steady.

You may have a good reason to use a steady.
I'm wondering what that reason is.
Unless you are getting chatter a bowl steady is not needed.

Unfortunately the tool makers and some tool catlogs are creating the illusion that a Bowl steady is a substitue for technique and proper tool usage.

If you hollow a bowl in steps from the rim to bottom a bowl steady adds no value unless the bowl is very thin. A 12" bowl a 1/4 thick needs no bowl steady and can be turned quite nicely with no chatter if it is turned to thickness an inch or so at a time from rim to bottom.

If you go to 1/8 inch then either a bowl or finger support on the outside of the bowl may be necesary for the first 2-3 inches.

Happy turning,
Al
 
hockenbery said:
Unfortunately the tool makers and some tool catlogs are creating the illusion that a Bowl steady is a substitue for technique and proper tool usage.

If you hollow a bowl in steps from the rim to bottom a bowl steady adds no value unless the bowl is very thin. A 12" bowl a 1/4 thick needs no bowl steady and can be turned quite nicely with no chatter if it is turned to thickness an inch or so at a time from rim to bottom.

Of course, a steady is a tool, like any other. It is employed to a purpose, and at the desire of the user. Love mine, wish it were easier to reattach it when I want to use it, but often the time it would require is better invested in a couple of careful passes.

Hollowing in steps is for hogging. It's twice as tough for me to get a fair curve with sequential turning as it is to make the continuous pass rim to button. It's also too easy for me to burn myself, or worse, slice myself on a too-sharp rim for me to go back to a hand steady. Used to do it with a glove, back when I had to. Don't care to return.

That said, I have to ask if the baitbegger was speaking of bearing heat or only surface of the wheels. If surface, dollars to donuts he was too far out of perpendicular to the axis of rotation with wheel orientation. That'll scrub the surface right off the wheels. Remember your Physical Science when they taught you the wind to your back put the low to your left in the northern hemisphere? Same reason - differential diameters. I bought some closeout rollerblade replacements to have on hand for mine. I have a few grooves in the originals now, but they're still good after a few years.
 
heat

the surface of the plastic wheels melted leaving deposit on bowl which i turned off 😱 😱 😱
 
That can happen if you allow the wheels to contact too far off the perpendicular to the axis of rotation. Remember if they contact across a bit of surface, the greater diameter is trying to turn them faster than the lesser, leading to heat-producing friction, or vice-versa, depending on angle. Too steep a slope on the sides can have the same effect, even if they are perpendicular, so adjust your thinking accordingly.
 
bowl

Too steep a slope on the sides can have the same effect, even if they are perpendicular

it was a small bowl, 6" across by 3" deep, i noticed only one wheel was touching the bowl and adjusted the steady, started truning inside again and noticed smoke then the plastic on outside of bowl

the wheels turn freely now so bearing are ok but the wheels are grooved now

i first used the steady on some aspen that was turned very thin and used it on 12" diameter walnut that it was very helpful on, i forgot i had it when doing the walnut and had started the inside when i added it , it was a lot more steady on 12" piece and i did not have to tighten the chuck any while roughing it out even while checking the chuck ever 3 minutes

i was more nervious on large walnut than the thin aspen
 
I have to agree with Al. I've never used a steady on a bowl. I haven't turned as many as Al. Proabably only fill a small car but I've still done a lot. I rough them down to an inch or so and then narrow the sides an inch or so at a time to the final thickness. I used to have trouble making the curves match when connecting the turned to unturned area but I got past that years ago. If you use your body to control the cut you have rally fine control and can easily connect the sides and follow the curve. I also find a freshly sharpened tool with a fine very light touch elimates the chatter and lets you make the final pass smoother.

I wouldn't think you would not need a bowl steady at all on one the size you mention. I do have a home made steady rest that I use for tall vases and hollow vessels. I used skateboard wheels.
I agree with some of the others and think that you had a bearing seize up. I couldn't guess at the reason other than high speed.
 
baitbegger i first used the steady on some aspen that was turned very thin and used it on 12" diameter walnut that it was very helpful on said:
Without knowing your hold method, I'll say that a steady is at least fair protection against a dismount even on a semi-major oh #*&!. Still, especially on a green piece, it makes sense to check the chuck snug whenever you turn off the lathe to move your rest, especially if you've got a crush hold rather than a fit hold. Reason enough to buy and use a tool, I'd say. Has to be at least as valid a purchase as paying a premium for someone's "name grind" gouge, eh?

Aspen flexes pretty badly even at 3/8 (@12") , especially wet, so a steady is going to be a help to keep uniform thickness where you otherwise might have problems thinning the long grain and skating the end. Only walnut I've turned was dry, but seemed to hold still pretty well. Good thing I don't get much of it, because it makes me sneeze.

Remember not to scrub the wheels across the piece, and you should have little problem with friction melting. Where you can't avoid it, because you have an inconvenient shape you want to use it on, you may have to live with minor scrub. It'll wipe easily, but may have compressed and heated the wood underneath, so you'll want to do a preventive water set of the grain before final hand sanding.
 
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