SPI Dial Test Indicator – 0.0005″ Graduation, White Dial, Calibrated

This SPI Dial Test Indicator (Model 21-378-5) provides precise, reliable measurement for machine setup, alignment, and inspection tasks. Featuring a 1-1/4″ white dial face and fine 0.0005″ graduations, it delivers high-resolution feedback ideal for CNC, milling, grinding, and tooling applications.
The indicator includes a 0.0790″ ball contact point mounted on a 0.6400″ stem, ensuring smooth, accurate readings across a range of surfaces. Each unit is calibrated for accuracy and ships in a protective storage case with included attachments for mounting flexibility. Built for machinists and inspectors who require dependable, repeatable precision, this SPI indicator is a robust tool for daily shop use.

• Specifications:
  ◦ Manufacturer: SPI
  ◦ Model / Item Number: 21-378-5
  ◦ Dial Diameter: 1-1/4″
  ◦ Dial Color: White
  ◦ Graduation: 0.0005″
  ◦ Ball Diameter: 0.0790″
  ◦ Contact Point Length: 0.6400″
  ◦ Calibration: Yes, calibrated
  ◦ Case: Included protective storage case
• Applications:
  ◦ Precision machine setup and alignment
  ◦ CNC router, mill, and lathe calibration tasks
  ◦ Inspection of part features and tolerances
  ◦ Surface plate and fixture measurement work
• Features & Benefits:
  ◦ High-resolution 0.0005″ graduations for precise measurement
  ◦ Calibrated for accuracy and ready for use
  ◦ Smooth indicator movement with ball-contact point
  ◦ Compact 1-1/4″ dial for clear, easy-to-read feedback
  ◦ Includes mounting accessories and storage case