Heat treat furnace

[Highpower]

(12-17-2015, 08:03 PM)f350ca Wrote: If your worried about strength cut the keyway in the ratchet 1/2 and step down to 10 mm with the key

Well that would work if I had a 1/2" keyway broach..... but naturally, I don't.

I don't think I would ever see anything come through my home shop that required a key that big. I do have a 1/2" broach, but it's a square broach. Because it cuts on all 4 sides it needs a round hole to start in. I really should pick up a few metric broaches though. Plenty of imports around here - tools, machines, cars....

But for now at least I think I will go with the 10mm - 3/8" stepped key idea. If I end up shearing off a key I can always re-cut the keyway in the ratchet later. Or just weld the ratchet to the pinion... depending on what kind of mood I am in after shearing off a key and busting my knuckles.

[RobWilson]

(12-16-2015, 09:24 PM)Highpower Wrote:

(12-16-2015, 01:49 PM)RobWilson. Wrote: ...... few being more than 2  but less than 4  

Too funny Rob. That is exactly the way it works, as my wife tells me. We used to do battle over those terms sometimes. But she informed me that a "couple" means 2, and a "few" means 3! Been that way ever since....  

Ha ha ha ha Willie it sounds like your good lady knows a thing or few 


Any way I think you have gone way overboard   with your controler , total over kill !  

Quote: But being a typical lazy American I would want a controller that reads out in Fahrenheit so I know immediately what I'm looking at. Conversion chart? 

 And the method I am about to describe is in Fahrenheit   , here goes , I was playing trivial pursuit last night the new edition and I got this question and thought of Willie straight away    ,not sure I should have typed that !


Question ,
What can you tell about the weather by counting cricket chirps ?     


Answer ,

Temperature  -  The old farmer's Almanac suggests counting the chirps in 14 seconds ,then adding 40 to get the temperature in Fahrenheit 



Whats do you think ?  ,no need for a thermocouple or black box    


Rob

[wawoodman]

If it's a Canadian cricket, would it chirp in Celcius?

[RobWilson]

(12-20-2015, 11:23 AM)wawoodman Wrote: If it's a Canadian cricket, would it chirp in Celcius?

Nope you would need a phone app  to do the conversion


Rob

[Highpower]

(12-20-2015, 05:16 AM)RobWilson. Wrote: Any way I think you have gone way overboard   with your controler , total over kill !  

Maybe so, but to paraphrase Ed... I would rather shoot for overkill than underkill.  

Quote:Whats do you think ?  ,no need for a thermocouple or black box    

Rob

I think I would go back to using crayons before trusting any "city" crickets. They don't know anything about being a meteorologist!

(12-20-2015, 11:37 AM)RobWilson. Wrote:

(12-20-2015, 11:23 AM)wawoodman Wrote: If it's a Canadian cricket, would it chirp in Celcius?

Nope you would need a phone app  to do the conversion  

Rob

[Highpower]

(12-20-2015, 05:16 AM)RobWilson. Wrote: ....I got this question and thought of Willie straight away    ,not sure I should have typed that !

Rob

I had to laugh at that for a "couple" of reasons, but mostly because I just went through that yesterday myself. I saw this posted on another forum and immediately thought of a guy I used to work with turning wrenches, that happens to have 2 dachshunds at home. I just had to email this photo to him and suggest he re-name his animals "Imperial" and "Metric".  

   

[EdK]

(12-20-2015, 02:08 PM)Highpower Wrote: ... I saw this posted on another forum and immediately thought of a guy I used to work with turning wrenches, that happens to have 2 dachshunds at home. I just had to email this photo to him and suggest he re-name his animals "Imperial" and "Metric".  

Good one!  

[DaveH]

 

DaveH

[Highpower]

He replied to me last night..... "WHAT THE ****!!!!???? This is like the 5th time somebody has sent me that same picture in the last week!"

[Highpower]

(12-17-2015, 01:42 PM)f350ca Wrote: How about a stepped key Willie. 10mm to fit the shaft and 3/8 to fit your keyway.

Is it better to trim a little from both sides of the key, or take it all off from one side?

No engineering schooling on my resume.
I'm just guessing one 90° corner (stress riser) is better than having 2?