Spi CMS220623073 Electronic Inside Micrometer 3.5-4in

Product Description

The SPI CMS220623073 is a three-point electronic inside micrometer designed for precision bore and hole measurement in machining, metrology, and quality-control applications. The instrument covers a measuring range of 3.5 to 4.0 inches (87 to 100 mm) with a resolution of 0.00005 inches (0.001 mm) and an accuracy of plus or minus 0.0002 inches (0.004 mm). Measuring faces are carbide-tipped for durability. The hardened stainless steel body carries an IP65 ingress protection rating, making it suitable for use in wet or coolant-present environments. The unit ships calibrated with a traceability certification included.

This inside micrometer is suited for production floor and inspection room use where bore diameter verification at 3.5 to 4.0 inches is required. The extension rod design allows measurements near the bottom of blind holes, with a maximum extension rod length of 5 inches and a gage depth of 5 inches (127 mm). A built-in wireless data transmission port supports integration with SPC data collection systems. The 330-degree rotating display lets the operator read measurement data from multiple angles without repositioning the instrument, which is useful in confined or awkward setups.

Key Features

• Measuring range: 3.5 to 4.0 inches (87 to 100 mm) with 0.00005-inch resolution
• Three-point contact design for self-centering bore measurement
• Carbide measuring faces resist wear in high-cycle inspection tasks
• IP65-rated hardened stainless steel body withstands coolant and debris exposure
• Built-in wireless data transmission with tolerance preset and GO/NG judgment function
• 330-degree rotating digital display for multi-angle readability
• Ships calibrated with traceability certification; one setting ring and one extension rod included

Compatibility

Designed as an OEM-style precision instrument for bore measurement applications conforming to ASME B89.1.13 standards. Compatible with SPC and data collection systems that accept standard digital output signals.

Installation Notes

Setup and calibration should be performed by a qualified metrology technician or machinist familiar with inside micrometer procedures. Before use, zero the instrument against the included 87 mm (3.5-inch) setting ring on a stable, temperature-controlled surface per ASME B89.1.13 guidelines. Keep the instrument clean and free of chips or coolant residue on the measuring faces prior to each measurement. Replace the CR2450 lithium battery as indicated by the low-battery indicator to maintain measurement accuracy.