a feeler guage cannot be calibrated, it is made at precise measurements that cannot be changed.
When a feeler guage is out of spec, it is replaced.
Yes, it is important to calibrate feeler gauges to ensure accurate measurements. Calibration involves comparing the gauge readings to a known standard and adjusting as needed to minimize errors. Regular calibration helps maintain the accuracy and reliability of the feeler gauge for precise measurements.
To calibrate a feeler gauge using a caliper, measure the thickness of the feeler gauge blades at multiple points along the length using the caliper. Check these measurements against the stated thickness of the blades to ensure accuracy. Make any necessary adjustments to the feeler gauge if the measurements deviate significantly.
With a straight edge and feeler gauges.
Feeler gauges.
Checking the spark gap on spark plugs, and other small clearances
Nonmetallic feeler gauges are used by technicians to measure the air gap that exists between the coil body and the armature on an electro-magnetic brake. This type of braking system generally can be found on industrial cranes and on marine davit hoist systems.
Feeler gauges are used to measure the clearance between two object surfaces, typically in small increments. They are commonly used in engineering and automotive applications to ensure precise fits and tolerances.
The important point in feer gauges ( also called thickness gages by some of the manufacturers ) is the thickness of the blades. Therefore in order to calibrate a feeler gauge you need to measure the thickness of the gauge at various locations along the length of the device. The standard used in the calibration should satisfy a TUR ( Test Uncertainty Ratio ) of at least 4:1 in order to limit the FAR ( False Accept Risk ) to nearly 2%. Such devices do not require periodic calibration. However, they should be standardized before every use by a standard in order to assure reliable measurements.
An electronic way of setting the gap in ignition points. This is more accurate than using feeler gauges.
Stock 350's have hydraulic lifters, so feeler gauges aren't needed. Get yourself a Chilton's manual or similar and read up on the valve adjustment process.
If you're asking about feeler gauges, then a pair of 0.002 plus an 0.001 would do, but make sure they are very clean and undamaged.
To calibrate compound gauges, you will need a calibration pump and a pressure calibrator. Connect the compound gauge to the calibration pump and apply pressure using the pressure calibrator. Compare the readings on the compound gauge with the readings on the pressure calibrator and make necessary adjustments to bring them into alignment.