Which Thickness Gauge is suitable for coating thickness measurement of taps and screws for small parts, and what is the price?

Coating thickness measurement is widely used in all walks of life. In basic life, many products, parts and even small screws are coated with different coatings to protect the durability of the product for better service life, but different products are reasonable. Coating thickness requirements are different. At present, there are many brands of coating Thickness Gauges at home and abroad. NBCHAO has gathered dozens of imported and domestic brands of coating Thickness Gauges, but they basically meet the conventional coating thickness testing. For some precision industries, such as screws, It is more difficult to test the coating thickness on these samples of taps, after all, the contactable area is very small, as small as or even less than 4mm. According to the thickness measurement structure principle of the coating Thickness Gauge, the contact area of ​​the probe needs to be smaller than the area of ​​the sample to be measured, otherwise the thickness cannot be measured accurately.

Today, it mainly provides corresponding solutions for the coating thickness measurement of such extremely small parts. NBCHAO has gathered many domestic and foreign brands of coating Thickness Gauges. Among these dozens of brands, only the United States Defelsko and EPK have micro-probes, which can meet the coating thickness measurement of small parts such as screws.

1. Defelsko's 0° miniature probe (PosiTector 6000 F0S1/F0S3/N0S1/N0S3)

Defelsko's miniature probes have 0°, 90°, and 45°. Generally, for small parts such as taps and screws, 0° microprobes are more preferred. The minimum contactable surface of Divesko's 0° coating thickness probe is φ5mm, so the applicable contact area for thickness measurement of small parts cannot be less than 5mm in diameter. In addition, for parts with a film thickness of less than 100 microns, the applicable minimum coating thickness test is recommended to be no less than 2 microns.

0° micro probe	Probe model	F0S	N0S
	scope	0~45mils	0~25mils
		0~1150um	0~625um
	precision	+ (0.02 mils + 1%) 0~4 mils + (0.1 mils + 3%) > 4 mils
		+ (0.5 um + 1%) 0~100 um + (2 um + 3%) > 100 um
	Accuracy is a fixed value plus a percentage of reading

The host of Defelsko's Positector6000 coating Thickness Gauge is universal and can be freely replaced with different probes. If Divers high 0° probe is used to test the thickness of small parts, then the overall pre-price is less than 1w.

Defelsko Coating Thickness Gauge 0° Probe Product details: https://www.nbchao.com/list26_b5_1438.html

2. EPK  MiniTest 735 coating Thickness Gauge host + F 0.5M-0 probe/N 0.3M-0 probe

In addition to the Defelsko brand, the German EPK also provides micro-probes, and the contact area is smaller than that of Defelsko. Of course, the overall cost is also higher. Basically, the budget price of the whole set is 2w+. EPK's magnetic 0° micro-probe has a contact area of ​​φ3mm, and the eddy current 0° micro-probe can measure a contact area of ​​φ2mm if it is equipped with a bracket. Therefore, it is suitable for the thickness test of small parts with smaller contact area. Note that EPK’s micro-probe needs to be tested with a matching bracket to ensure the stability and accuracy of the test and to avoid the probe from breaking.

The above are the current two types of coating Thickness Gauges that can test small parts of taps and screws. If you have any questions, you can consult the technical engineers of NBCHAO Mall.