Mitutoyo 521-106 | Dial Indicator | Calibration Tester | Series 521 | Inch | Graduation 0.00001 inch | Range 0 to 0.2 inch | Mass 7.5 kg
Part No. 521-106 | Range 0–0.2" | Graduation 0.00001" | Accuracy ±0.00003"
Product Overview
The Mitutoyo 521-106 is a Series 521 calibration tester designed for checking the performance and indication accuracy of dial indicators, dial test indicators and electronic comparison gauge heads. It provides a 0–0.2" measuring range, 0.00001" graduation and ±0.00003" accuracy for precision verification work.
The tester provides a controlled reference movement against which an indicator under test can be compared. The instrument is mounted in the universal bracket, its contact is brought into position against the tester spindle, and the tester is advanced through defined measuring points. The readings from the indicator can then be compared with the reference values from the tester.
The universal bracket accepts indicator stems from Ø4 mm to Ø10 mm, allowing a range of dial and lever-type indicators to be checked without additional mounting accessories. Dual colour-indexed graduation markings help identify the measuring direction during testing.
A carbide-tipped measuring face provides a durable contact surface for repeated verification work. The 521-106 is supplied in a wooden case for protected storage when the tester is not being used.
With its 0.00001" graduation and ±0.00003" accuracy, the 521-106 is intended for precision indicator verification rather than routine dimensional measurement. It can be used as part of an internal equipment-checking procedure before critical inspection work, after an instrument has been dropped or subjected to suspected damage, or at defined intervals within a workshop's quality system.
The tester covers 0–0.2". For applications requiring a shorter 0–0.05" range, the Mitutoyo 521-104 is the corresponding range option supplied in your product reference.
Key Benefits
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0–0.2" measuring range for short-range indicator verification.
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0.00001" graduation for fine reference readings.
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±0.00003" specified accuracy.
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Universal bracket for Ø4–10 mm indicator stems.
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Suitable for dial indicators, dial test indicators and electronic comparison gauge heads.
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Dual colour-indexed graduation markings for directional indication.
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Carbide-tipped measuring face for repeated contact.
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Supplied in a wooden case for protected storage.
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Suitable for in-house indicator verification and metrology applications.
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Inch configuration for compatible inch-based inspection equipment.
For current pricing and availability of the Mitutoyo 521-106, call +966 53 132 1586 or email mathews@generaltechsaudi.com.
Who This Product Is Best For
The Mitutoyo 521-106 is suited to quality-control departments, metrology teams, calibration laboratories, machine shops and maintenance departments that regularly use dial indicators and dial test indicators.
It can be useful where indicators need to be checked between scheduled external calibration activities or whenever an instrument's indication is in question. Typical situations include checking an indicator after accidental impact, verifying an instrument before a critical inspection job, and performing periodic internal equipment checks according to the organization's documented quality procedure.
The tester can also support workshops that maintain multiple indicators with different stem sizes because its universal bracket accommodates Ø4 mm to Ø10 mm stems.
How to Use
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Secure the indicator under test in the universal bracket.
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Position its measuring contact against the tester's measuring spindle or contact face.
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Establish the appropriate zero or reference position on both the tester and indicator.
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Advance the calibration tester through the required measuring points within the 0–0.2" range.
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Record the indicator reading at each reference position.
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Repeat the measurement in the required direction to evaluate the indicator's indication behaviour.
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Compare the observed readings with the applicable tolerance or calibration procedure.
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Document the results according to your organization's inspection or calibration records.
For formal calibration work, use the applicable documented procedure, reference standards and traceability requirements of your quality system.
Frequently Asked Questions
What does the Mitutoyo 521-106 calibrate?
The 521-106 is designed for checking short-range dial indicators, dial test indicators and electronic comparison gauge heads.
What is the measuring range of the Mitutoyo 521-106?
The tester has a 0–0.2" measuring range.
How accurate is the Mitutoyo 521-106?
The supplied Series 521 catalogue data specifies ±0.00003" accuracy with 0.00001" graduation.
What indicator stems does the 521-106 accept?
The universal bracket accepts stems from Ø4 mm to Ø10 mm.
What is the difference between the 521-106 and 521-104?
The supplied product data identifies the 521-106 as the 0–0.2" range model, while the Mitutoyo 521-104 is the shorter 0–0.05" range option. Select the tester according to the measuring range of the indicators you need to verify.
How often should a dial indicator be checked?
The appropriate interval depends on the instrument, application and documented quality procedure. Indicators may also require verification after a drop, impact, suspected damage or whenever their readings appear questionable.
Does the Mitutoyo 521-106 require additional mounting accessories?
The supplied data specifies a universal bracket that accepts Ø4–10 mm stems without additional accessories for the stated indicator types.
How do I buy the Mitutoyo 521-106 in Saudi Arabia?
Contact General Tech Services in Dammam at +966 53 132 1586 or email mathews@generaltechsaudi.com for current pricing and availability.
