[TheForge] Drying Borax (was: Welding flux?)

[Peter Fels & Phoebe Palmer]

On Jul 23, 2013, at 7:40 PM, Jerry Frost wrote:

Let me see if I have this straight. the rollers are now too long for the space between the mounting plates?
Yes
 That's not a comment about what's changed, just about relative size. I can think of two basic solutions, spread the plates OR shorten the rolls.

The rolls are very hard and true..the flat inner races of needle bearings. Nothing else is still true and was never hard.

Okay, are the ends of the old rolls galled? A yes would indicate friction and the plates had moved in. 

The rolls were still smooth and hard till they broke. The side plates that squeezed them were distorted and scarred from the blow out. They are what i have to clean up tomorrow, having done the column today.

That's my bet anyway, steel's not known for growing much unless hot. to be sure, mic the space as is now and check against specs or failing specs the original rolls or mic the space where it's welded to the column.

No point. I'm not going to drive them into position with a lead hammer and still expect them to turn freely.

 Spreading the plates is a different thing, even hydraulics will have some spring making fine adjustments harder. I'd think a pair of long hefty bolts with between the plates would make a decent screw jack you can keep spread consistent.

Hah! That's why i asked you Jerry!  I do have some big, hairy old bolts, nuts and washers that might generate enough even force. Good!
I'll give it a try...sneak up on it for sure. Thanks!

I'd crank it out a bit at a time and when the right distance use a torch to heat the inside of the plate so it wouldn't want to rebound as much. Just opening it to the right distance isn't going to do it, it will rebound no matter what below bringing it to way too high a heat but measuring it after this move will tell how much rebound is happening so the next stretch will be much closer.

Heat! On all that pretty gold paint? ( slap forehead), now Jerry, don't you have any sense of propriety?

Been looking for a used Harris 18-5 torch butt to no avail...
Hard to shell out $240 bucks unhesitatingly, when i already have half a dozen torches...Ah well.....pf

Jer


On 7/23/2013 1:01 AM, Peter Fels & Phoebe Palmer wrote:
> well:
> Let me pick your brain a bit then.
> I've ordered the rollers for the press and they should arrive this week.
> However, when i extracted the shaft, then tried to remove the rollers , they were jammed in there
> solidly enough that i had to use angled prybars to work them free and that took about 10 minutes.
> That's too tight for free turning rollers,
>  so i think that the side plates moved in at some point in their abuse history.
> Guessing i'll need to spread the plates a few thousandths or grind more clearance in that awkward location,
> and i'd rather not take the whole silly thing apart for this.
> The squat, 3 ton portapower cylinder is about 3/16 too tall to fit in there,
> and the little dinky one isn't powerful enough.
> Wondering about trying to drive in opposing sets of wedges
> But that's marginal for several reasons.
> Reluctant to get abrasive grains in the works and not enough room to swing big files.
> Any ideas?
> 
> On Jul 22, 2013, at 11:47 PM, Jerry Frost wrote:
> 
> On 7/22/2013 9:44 PM, Peter Fels & Phoebe Palmer wrote:
> 

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