Re: [MBZ] Variation/accuracy in feeler gauges

[Allan Streib via Mercedes]

Yeah that is a good idea.

Allan

On Wed, Aug 4, 2021, at 10:24 PM, Peter Frederick via Mercedes wrote:
> Either the KD Tools is mis-marked or it's gorssy inaccurate.  0.15mm is 
> 0.005905", so 0.006 is a s close as you are going to get with hand tools.
> 
> Might want to check a couple more "leaves" on the KD Tools set, if they are 
> out too throw it out.  Decent feeler gauges aren't that expensive and ones 
> that are far out of spec are a cause of trouble.
> 
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Re: [MBZ] Variation/accuracy in feeler gauges

[Peter Frederick via Mercedes]

Either the KD Tools is mis-marked or it's gorssy inaccurate.  0.15mm is 
0.005905", so 0.006 is a s close as you are going to get with hand tools.

Might want to check a couple more "leaves" on the KD Tools set, if they are out 
too throw it out.  Decent feeler gauges aren't that expensive and ones that are 
far out of spec are a cause of trouble.



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[MBZ] Variation/accuracy in feeler gauges

[Allan Streib via Mercedes]

Was checking valve clearances on the Karmann Ghia tonight. Spec is .006" or 
.15mm.

I have two sets of feeler gauges. One is metric, Craftsman brand, that I've had 
since the 1980s.

The other is in thousandths, KD Tools brand, picked up at a parts shop probably 
at least 15-20 years ago.

I noticed that the .006" gauge on the KD Tools set felt noticably thicker than 
the .15mm on the Craftsman set. So I thought I'd try to verify which one was 
correct. I don't have a micrometer but have an old Craftsman vernier caliper 
(probably from the 1950s, was my Dads) as well as a dial indicator that I think 
I bought at Sears about 10 years ago (unbranded, but "Made in USA").

The caliper (if I correctly remembered how to read it) measured the Craftsman 
feeler gauge right at .006", and measured the KD Tools gauge at .010".

I set up the dial indicator by clamping it to the rip fence of my table saw, so 
that the plunger was in contact with the table. I then slipped each feeler 
gauge under the contact point. The Craftsman gauge read .008" and the KD Tools 
gauge read .012" so slightly different but consistent.

Guess I'll go with the Craftsman as the more accurate one. Never imagined there 
would be that big a difference. Might pick up a micrometer at Harbor Freight 
just to see what it says.

Allan
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