SPI Hole-Mikes
- Three point internal mikes for precise direct measurement of bore diameters.
- Self aligning and self centering.
- Carbide measuring anvils.
- Suitable to measure to within .050" of bottom of blind hole, up to 4" capacity.
- Feelers taper toward the back for positive reading of the front edge.
- Ratchet stop provides uniform measuring pressure and assures highest reading accuracy.
- In lieu of Setting Rings, Setting Frames are provided for diameter ranges above 4" dia.
- Hole - Mike accuracy: 1.6" 4" ± .00012", 4" 8" ± .0002", 8" 12" ± .0004"
- Setting Ring accuracy: 2" ± .0001", 2.8 & 3.6" ± .0002", 5 & 7" ± .0003", 9 & 11" ±.0005"
- Set comes with Extension, Setting Rings And Spanners In Wooden Case
Setting Rings:
- 10-748-2 - Size 2.000"
- 10-749-0 - Size 2.800"
- 10-750-8 - Size 3.600"
- 10-753-2 - Size 5.000"
- 10-756-5 - Size 7.000"
- 10-759-9 - Size 9.000"
- 10-762-3 - Size 11.000"
Click to see Master Setting Ring Gages
