Product Description
The MITUTOYO 209-954 is an outside electronic caliper gage designed to measure external groove dimensions with ball-to-ball contact points. It delivers a maximum measurement of 1.97 inches (50.00 mm) and a resolution of 0.001 inch (0.02 mm), making it well-suited for precise groove and bore spacing checks. Accuracy is rated at 0.002 inch (0.04 mm). The gage outputs measurement data electronically, allowing integration with SPC systems or data loggers. It runs on two AAA batteries, which are included. Licensed metrologists, machinists, and quality technicians use this tool in production and inspection environments.
This gage is built for external groove measurement applications where a standard caliper jaw cannot reach. Typical use cases include measuring snap ring grooves, retaining ring seats, and external undercuts on turned or machined components. The ball-to-ball tip configuration allows the gage to seat reliably inside narrow groove profiles. Leg length is 6.57 mm and tip diameters are available at 3.0 mm and 12.0 mm, supporting a range of groove widths. The groove width capacity in decimal inch is 1.17 inches. This tool is commonly used in machine shops, toolrooms, and quality inspection stations handling precision machined parts.
Key Features
- Ball-to-ball contact point design for accurate seating in external grooves
- Maximum measurement of 1.97 inches (50.00 mm) with 0.001 inch resolution
- Rated accuracy of 0.002 inch (0.04 mm)
- Electronic data output compatible with SPC and data collection systems
- Groove width capacity of 1.17 inches
- Includes two AAA batteries ready for immediate use
Compatibility
Designed as a replacement-style outside electronic caliper gage for external groove measurement tasks on precision machined components. No specific compatible model numbers or system families were provided by the manufacturer for this listing.
Installation Notes
This gage is a handheld precision measuring instrument and does not require permanent installation. Calibrate or zero the gage before use following standard metrology procedures. Keep contact points clean and free of chips or coolant residue to maintain measurement accuracy. Store in the provided case when not in use to protect the contact tips and electronic components.
Technical Specifications
- Gage Type: External (Outside)
- Contact Point Type: Ball to Ball
- Maximum Measurement: 1.97 inches (50.00 mm)
- Minimum Measurement: 0.0000 mm
- Resolution (Decimal Inch): 0.001 inch
- Resolution (mm): 0.02 mm
- Accuracy: 0.002 inch (0.04 mm)
- Groove Width Capacity: 1.17 inches
- Tip Diameter: 3.0 mm and 12.0 mm
- Leg Length: 6.57 mm
- Data Output: Yes
- Battery Size: AAA
- Number of Batteries: 2 (included)
- Package Weight: 3 pounds
- Package Dimensions: 16 inches x 10 inches x 5 inches
Standard Information
- Brand: MITUTOYO
- Manufacturer Part Number: 209-954
