SPI 3-Point Hole-Mike Inside Micrometers & Sets

Mechanical Inside Hole Micrometers

Features:

• Three point internal micrometer 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 7″ dia.
• All sets come with Extension, Setting Rings And Spanners In Wooden Case

Click to see Master Setting Ring Gages

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