COAXIAL INDICATOR SPECIFICATIONS

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The Blake 801 Coaxial Indicator is engineered for accurate centering and alignment applications in machining environments. Designed for use under spindle rotation, the indicator provides fast and repeatable setup for internal and external diameters.

Standard Specifications

Accuracy

• Centering      accuracy: within +/-.0002" *
• Dial      graduation: .0005" **

Operating Speed

• Maximum      recommended spindle speed: 800 RPM

Capacity

• Internal      diameter range: approximately 5/32" to 4-1/4"
• External      diameter range: up to approximately 4-1/4"

Included Components

• 801
  • Coaxial indicator body assembly
  • Internal feeler
  • External feeler
  • Restraining arm
  • Protective storage case
• 801-X
  • Coaxial indicator body assembly
  • 3 Internal feelers (2 inch, 4 inch, and 6 inch)
  • 3 External feelers (2 inch, 4 inch, and 6 inch)
  • Restraining arm
  • Protective storage case

Important Operating Notes

The Blake Coaxial Indicator is designed as a centering instrument and should not be used as a direct measuring device. The indicator is intended to locate spindle center by comparing movement across the diameter being indicated.

For best performance:

• Operate      at moderate spindle speeds
• Verify      proper feeler contact before spindle rotation
• Use      under normal machine operating conditions
• Avoid      excessive shock or impact

Designed for Machine Shop Performance

The Blake Co-Ax Indicator is suitable for:

• Manual milling machines
• CNC equipment
• Tool room applications
• EDM machines with spindle chuck/collet for aligning
• Horizontal and vertical spindle setups

Its quality construction and precision movement make it a trusted setup tool for machinists requiring reliable centering performance.

* +/- .0002" positional accuracy is verified at the factory under optimal conditions. Needle must be perfectly still under power for maximum accuracy. 

** .0005" applies when used with 2" feeler and diameter being measured is 2 inches.  For dial graduations for other configurations see table at bottom of this page.