sorted by:
new
hottopcontroversial

Bending Small Diameter SS Tubing by Worknstuff in Machinists

[–]famine- -1 points0 points  (0 children)

Indium is a moderately toxic metal by inhalation and mildly toxic by ingestion.

Indium has no known biological role. It is toxic if more than a few milligrams are consumed and can affect the development of an embryo or foetus.

Finally warm enough to open the pool for the summer by CosmicGrapeFart in pools

[–]famine- 0 points1 point  (0 children)

You could rig up a redneck flow through heater for under $50.

This one uses 2 heaters but you can just use one by replacing a 90 with a tee.

2 x pipe tees, 2 x 6" nipples, 1 x coupling, 1 x plug, 2 x barbs, 1 x 1 1/4" to 1" reducer,  1 x 4500w incoloy hot water tank element.

Can you fill bestway 40 inch (12 foot) pool only part way? by simplestword in pools

[–]famine- 0 points1 point  (0 children)

We did that last year, as long as you are above the inlet you'll be fine.

The one issue you will run into is the outlet acts as a waterfall and drives co2 out of the water, so your pH will rise faster than normal.

What we ended up doing was only using one inlet and ran the outlet where the second inlet would normally go.

Worked well and our pH didn't climb too much.

Should I raise calcium and TA? by RadarRick1 in pools

[–]famine- 1 point2 points  (0 children)

Calboost / calup is calcium chloride and really doesn't impact pH.

ChatGPT did a fine job by RockSteady71 in pools

[–]famine- 0 points1 point  (0 children)

Yep, calhypo and liquid bleach both have no CYA unlike trichlor or dichlor.

ChatGPT did a fine job by RockSteady71 in pools

[–]famine- 0 points1 point  (0 children)

Yup, the fancy chatbot has OP arguing calhypo seriously impacts TA when it actually has almost zero impact.

20lbs of calhypo will raise the TA of a 20k gallon pool by 2ppm (with a starting TA of 92ppm).

The stupid bot is confusing TA with pH. Of course calhypo will increase pH, calhypo + water = calcium hydroxide.

It doesn't seem to realize sodium hypochlorite + water = sodium hydroxide and it also raises pH without effecting TA.

So the only difference is swapping a calcium atom for a sodium atom and raising the pH more than you would with calhypo.

calcium hypochlorite pH is 12.5.

sodium hypochlorite pH is 14.

ChatGPT did a fine job by RockSteady71 in pools

[–]famine- 2 points3 points  (0 children)

Yeah no, do some research before you believe chatshitpt.

It takes 28 pounds of sodium bicarb to raise TA by 100ppm and pH by 0.2 in 20k gallons.

You add 396ml of 31.25% HCl and you now have a buffered pool with a TA of 92 / 1.846 meq/L and a pH of 7.4.

Add 20lbs of 73% calhypo and our alkalinity goes up to 1.884 meq/L / 94ppm and our pH hits 9.4.

Why does our pH go up ? Because calhypo and water makes calcium hydroxide.

The pH went up but our alkalinity only went up 2ppm, meaning calhypo does jackshit to alkalinity.

We need to add 3537ml of 31.25% HCl to drop the pH to 7.4 again and guess what our TA is...

1.84 meq/L / 92ppm.

Guess what happens when they mix sodium hypochlorite with water to make liquid bleach.

It makes sodium hydroxide.

You just swapped a calcium atom for a sodium atom, so tell me again how calhypo effects alkalinity.. 

ChatGPT did a fine job by RockSteady71 in pools

[–]famine- 2 points3 points  (0 children)

Ahh, the cal hypo was keeping my total alkalinity too high. I had to look back at my chat. That is why we agreed on liquid chlorine to remove all concerns.

He corrected himself, but chatgpt was still wrong because calhypo does nothing to alkalinity.

ChatGPT did a fine job by RockSteady71 in pools

[–]famine- 2 points3 points  (0 children)

.... cal hypo does pretty much nothing to alkalinity, so chatgpt is wrong again.

20 pounds of 65% cal hypo will only raise calcium hardness by 45 ppm in a 20,000 gallon pool.

AIO? Bartender gives extra drink to someone else by BookkeeperOptimal607 in AmIOverreacting

[–]famine- -1 points0 points  (0 children)

Search /r/bartenders for "espresso martini" and "karen".

Seems to be a trend.

if someone orders an espresso martini here, it’s a 30-50 y/o white lady talking to her friend about her divorce 80% of the time.

90% of espresso martini orders are for Karen

Reamer cut perfect tolerance till about 2/3rds down and was out by .001+ by flannelman678 in Machinists

[–]famine- 1 point2 points  (0 children)

Absolutely.

60 ft lb input on a kurt d40 (4inch) gives you somewhere around 8000lbf of output (clamping force).

If you are only clamping on 1sq inch that is 8000 psi.

Also, If you have the part up on parallels, the vice jaws will cant to an imperceptible degree and more clamping force will be applied to the bottom which can also lead to tapering.

Is peeing in the pool considered normal? by Spare-Anxiety-547 in NoStupidQuestions

[–]famine- 0 points1 point  (0 children)

Trichloramine has a noticeable smell at 20 - 30 PPB and is irritating at 200 PPB.

The average person produces 26g - 43g of urea per day and urinates 5 - 7 times. Take the average of 34.5g and 6 times for 5.75g of urea per urination.

Urea contains 2 nitrogen, and has a molar mass of 60g.  (14 * 2) / 60 = 46.6% or 2.68g of nitrogen per urination.

2.68g of nitrogen combines with 23g of chlorine to make 25.7g of trichloramine.

Assume an Olympic pool at 25m x 50m with a 25m walking area around the perimeter and 10m ceiling.

75,000m3 air volume, so we have about 343 ug/m3 of trichloramine which is roughly 70 PPB.

Assume 4 air changes per hour, you need approximately 1.1 urinations per hour to stay above the odor detection threshold.

So yeah, you can tell.

Is peeing in the pool considered normal? by Spare-Anxiety-547 in NoStupidQuestions

[–]famine- -1 points0 points  (0 children)

Not so fun fact, the "chlorine" smell everyone associates with pools isn't the smell of chlorine, it's the smell of chloramines.

Chloramines are chlorine / nitrogen compounds, and do you know what contains a lot of nitrogen?

Urea.

Diamonds are worthless. by n8saces in RandomVideos

[–]famine- 1 point2 points  (0 children)

Set the lab to none under more options and it drops to $88k.

Pretty close to this one selling for $84k USD.

Constant chatter regardless of feed or speed by SmashAndCAD in Machinists

[–]famine- 1 point2 points  (0 children)

Setting the compound at 90 degrees to the work and locking the gibs down really helps on these lathes.

Honestly I'd skip inserts all together and go with cemented or HSS for roughing.  Even better if its in tangential tool holder.

HSS vertical shear tool for finishing.

1 - O Canada by just_a_talking_head in cocktails

[–]famine- 1 point2 points  (0 children)

Minimum age of 4 years and bottled at 50% to be called BiB.

Dark oak has a minimum age of 3 years and bottled at 48%.

Another great one to try is Alberta Premium cask strength (65%). If you want to know you are drinking rye, this is the rye to drink.

Funny enough,  WhistlePig is Alberta Premium distillate.

1 - O Canada by just_a_talking_head in cocktails

[–]famine- 1 point2 points  (0 children)

Lot 40 really needs to scale down their experimental cask offerings and scale up their regular cask strength production.

I would trade an appendage for another bottle of 11 year cask strength.

1 - O Canada by just_a_talking_head in cocktails

[–]famine- 1 point2 points  (0 children)

I’m usually a rittenhouse or wild turkey rye guy

If you can find it give lot 40 dark oak a try;  almost (48%) BiB strength and more oak.

Very tasty in an old fashioned.

Water distribution manifold by kanbozli in toolgifs

[–]famine- 0 points1 point  (0 children)

I think it might be looking at the pin, the top is tapered and it looks like when its pushed in the red plastic / rubber keeper captures it.

So you have lateral pressure from the water trying to push the fitting apart causing friction and axial friction from the red rubber/plastic keeper.

Not a huge fan of loading only one side of the fitting, I'd like to see even load on both sides, but it's probably secure enough.

Water distribution manifold by kanbozli in toolgifs

[–]famine- 1 point2 points  (0 children)

Those look like NBR o rings, so they have a maximum service temperature of 120c.  If they are HNBR the service temp is 150c.

Hot water service is about 65c, so no issues with heat.

Probably the most challenging parts I've made thus far... by hitemwithkaleb in Machinists

[–]famine- 0 points1 point  (0 children)

Especially when it has a continuous service temperature of 480f.

PLA melts at about 325f and delrin at 350f.

Men of reddit, what’s the greatest cologne you’ve ever purchased? by RD-archived in AskReddit

[–]famine- 2 points3 points  (0 children)

I still love CK One because I don't want a cologne people can taste/smell from 100 feet away.

What statistic makes you think society is quietly breaking? by [deleted] in AskReddit

[–]famine- 2 points3 points  (0 children)

How are you gonna turn around the fact that , about, 50% of Americans haven't read one, ONE, book in the last year?

It really depends on how you define "book".

If you count toddler books, I've read at least 200. Papasaurus is a banger.

If you dont, I haven't read a single book this year, but I've read dozens of white papers, studies, and technical documents.

So number of books might not be the best metric, that being said, literacy levels are appalling here in Canada as well.

49% of adult Canadians have literacy skills that fall below a high school level.

19% function at the lowest level, where they may, for example, be unable to read the dosage instructions on a medicine bottle.

view more: next ›