Point-Spectrometry Measurement of Bottom Tapped Hole Depth

In the machining process, dimensions such as the depth of bottom tapped holes have a significant impact on the manufacturing and application of bottom screws. Therefore, processes including accurate measurement and control of these dimensions are particularly critical.

I. Inspection Requirements

• Product Name: Bottom Screw

• Product Size: 8.6 mm

• Measurement Item: Hole Depth

Figure | Physical Picture

II. Measurement Process

The solution adopts direct point-spectrometry measurement to record the height difference from the bottom of the bottom screw to the inner edge of the tapped hole. This method avoids measurement blind spots and reduces thermal drift.

Figure | Measuring Point (Bottom)

Figure | Measuring Point (Hole Depth Inner Diameter)

Figure | Measurement Results (Unit: mm)

Data Description: Ten dynamic measurements were performed using the SC10015. The repeatability of the height difference is 0.003 mm.

III. Sensor Selection

• Point-Spectrometry Model: SC10015

• Spot Size: 19.2 μm / 40.3 μm

• Measuring Range: 10 mm

• Angular Characteristics: ±15°

• Numerical Aperture: 0.26

• Working Distance: 40 mm

• Axial Resolution: 0.012 μm

• Linearity: ±0.01% F.S.