[Shop-talk] Tire Pressure Gauges

[Pat Horne]

Jeff, I really don’t have answers to your questions but I can tell you how I do things. 

First, I don’t use inflators, I use separate air chucks & pressure gauges. I prefer to use tools that are good at one job, rather than so so on multiple jobs. 

Second, whatever gauge I buy, I compare its reading to at least 2 others both when new & from time to time. If I have access to someone with a high dollar gauge I’ll add that reading to the mix from time to time. 

Peace,
Pat

Pat Horne 
We support Habitat for Humanity


On May 29, 2022, at 12:11 PM, Jeff Scarbrough <fishplate at gmail.com> wrote:


A couple of tire pressure gauge questions:

I got tired of cheap Horrible Freight tire inflators, so I sprung for a brace of Milton S-506 inflators, thinking of they were good enough for the gas station of my youth, they ought to be ok now.  One in the garage, one in the shop...they don't see a ton of use.  Last week, I was filling bicycle tires in the garage with the hotdog compressor, and couldn't get the air up sufficiently in the tire.  Finally went to get another gauge...my electronic gauge quit, and my 50 years old Bridgeport Brass gauge needs rebuilding, so I grabbed the.othwr Milton inflator.  Turns out, I had missed blowing up the bicycle tires only by a miracle of Chinese rubber.  One inflator reads 50 psi while the other one reads 90.

So, like when two inmates at the asylum both claim to be Napoleon, at least one of them is lying. And at least one will need repairing.

So, two questions:. 

1.  Any suggestions for a good reliable electronic or analog pressure gauge to verify/calibrate the inflators?  (I also need one to put in my daughter's car, so gloveboxability is a plus).

2.  Anyone ever repair a Milton (or Bridgeport) tire gauge?  Any suggestions?  The Milton's aren't very old, especially in terms of what we old guys expect from our expensive American made tools.

Bonus question:. How might one calibrate a pressure gauge against a primary source?  I'm thinking of a water column or something, but 35 psi is approximately 80 feet of water.  I'm finding that impractical for home use.
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