How to Clean Gage Blocks and Gage Pins prior to Calibration

C

Curtis317

How do you clean gauge blocks and gauge pins prior to measuring them for calibration? Ultrasonic cleaners? Alcohol?
 
Jim Wynne

Jim Wynne

Leader
Admin
Re: Calibration of Gage Blocks and Gage Pins

Starrett's advice on care and feeding of gage blocks is here. There is generally no need for special cleaning prior to calibration; a wipe with a clean lint-free cloth should be enough. Mineral spirits, in small doses, can be used if necessary to remove oil. This also applies generally to pins.
 
N

normzone

Trusted Information Resource
Re: Calibration of Gage Blocks and Gage Pins

Some recommend distilled spirits - it depends on your particular tastes and your budget ;-)
 
D

dgriffith

Quite Involved in Discussions
Re: Calibration of Gage Blocks and Gage Pins

When my piston gauge masses are recal'd, my vendor does not clean them before making an as-found determination. The premise is that I've been using them in that condition.
Should gage blocks be cleaned before making an as-found determination?
Should they be cleaned before making an as-left determination?
 
Jim Wynne

Jim Wynne

Leader
Admin
Re: Calibration of Gage Blocks and Gage Pins

dgriffith said:
When my piston gauge masses are recal'd, my vendor does not clean them before making an as-found determination. The premise is that I've been using them in that condition.
Should gage blocks be cleaned before making an as-found determination?
Should they be cleaned before making an as-left determination?
Click to expand...

I don't know the circumstances under which the OP is calibrating gage blocks, but in general things used as masters should be calibrated by a qualified outside source. I agree that for things like calipers, micrometers, indicators, etc. that the as-found condition should be ascertained before any cleaning is done. On the other hand, cleaning of gage blocks, which have no moving parts, is more of a housekeeping issue; the results are not likely to be changed by cleaning unless the blocks have significant amounts of particulate matter adhering to them. Also, gage blocks be wiped with the aforementioned lint-free cloth just to maintain cleanliness.
 
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