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Chicago Dial Indicator

American Made Precision Measuring Products Since 1932

Chicago Dial Indicator Co. offers a full line of dial indicators and accessories to expand their usefulness. The advanced, simplified design of these gages is based on over 85 years of experience in manufacturing dial indicators which are well known for their accuracy, sensitivity, trouble-free long life, and ease of operation.

Design Features:

  • Heat-treated stainless steel racks, gears and pivots
  • Non-magnetic hairsprings
  • One piece forged brass case
  • Knurled bezels for easy, no-slip grip
  • Acrylic plastic crystals are non-yellowing, provide high scratch resistance
  • Fine, easy-to-read graduations on non-glare dials (English: white, Metric: yellow)
  • Four-position back permits 90 degree dial positioning
  • Chrome plate finish
  • All CDI indicators are supplied with serial # labels


Balanced and Continuous Dial Models

Two types of dials are offered in all models: Balanced dials with plus and minus readings for comparative work and continuous dials for direct measurement of length and depth. Long-range continuous dial indicators have single or dual revolution counter hands to facilitate reading. CDI can furnish special dials to fit your specifications. Price on application.

Graduation and Range

CDI dial indicators are built to provide precise measurement with graduations of .0001", .00025", .0005", .001" and .010" (0.002mm, 0.005mm to 0.01mm). Total range of travel is .020" to 5" or 0.5mm to 50mm.

Jeweled Bearings

All CDI dial indicators are available with fully jeweled movements. Sapphire bearings mount directly into upper and lower plates with no auxiliary bushings, reducing the possibility of misalignment. Highly polished jewels have an olive hole design which, together with CDI hardened and burnished pivots, provide lowest possible bearing friction and maximum resistance to wear. Jeweled bearing movements are recommended for heavy use applications and whenever extremely high sensitivity is required.

Special Applications

CDI has always been a leader in OEM or special application dial indicators. If you have a special application, please contact our sales department for assistance. We have been manufacturing specials for over 85 years and there is a good chance we have already seen your application or experienced something similar. A few examples of special application include:
  • Special Stems
  • Long Stems
  • Threaded Stems
  • Stop Brakes
  • Inverted Dials
  • Pushdown Indicators
  • Waterproofing
  • Special Dials
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