Mitutoyo 293-668-20 Digital Absolute Micrometer QuickMike 50-80mm
Mitutoyo 293-668-20 QuickMike Micrometer, 50–80 mm, Digimatic ABSOLUTE, 0.001 mm, IP65
Mitutoyo 293-668-20 QuickMike Micrometer 50-80mm | KSA
Product Summary
The Mitutoyo 293-668-20 QuickMike micrometer measures outside dimensions from 50 to 80 mm with 0.001 mm resolution and ±3 µm instrumental accuracy. Its rapid spindle advances 10 mm per thimble rotation, allowing the full 30 mm range to be covered in approximately three rotations. The ABSOLUTE linear scale retains the origin after power-off, while IP65 protection helps protect against dust and coolant. A 50 mm standard bar is included for origin setting.
Product Description
The Mitutoyo 293-668-20 QuickMike micrometer is designed for fast outside measurement of medium-to-large metric components in the 50–80 mm range. It is suitable for production inspection, machine shops, maintenance workshops and quality-control applications where larger components need to be checked without excessive spindle winding.
The QuickMike mechanism provides a rapid 10 mm spindle feed per thimble rotation. This allows the spindle to travel across the full 50–80 mm measuring range in approximately three rotations, reducing positioning time during repetitive inspections.
The instrument provides 0.001 mm resolution and ±3 µm instrumental accuracy. Its measuring faces are carbide-tipped with a micro-lap finish, while the 6.35 mm diameter non-rotating spindle helps maintain controlled contact with finished or coated surfaces.
The ratchet friction thimble provides a specified measuring force of 5–12 N, supporting consistent measurement technique. The measuring faces have 0.3 µm flatness, while parallelism is specified at 2 µm.
The ABSOLUTE linear scale retains the origin after power-off, reducing the need for repeated zero-setting during routine inspection. The LCD has 10 mm character height for clear viewing, while MIN Hold can be used to retain the minimum reading during appropriate measurement procedures.
The 293-668-20 has an IP65 rating, providing protection against dust and coolant under the specified rating conditions. Its Digimatic SPC output can transfer measurement results to compatible inspection and data-collection equipment.
The micrometer is supplied with an SR44 battery, 50 mm standard bar and fitted plastic case. The standard bar provides the reference for setting the origin before measurement.
For smaller metric components, the Mitutoyo 293-667-20 covers 25–55 mm. For larger metric components, the 293-669-20 covers 75–105 mm. The corresponding inch-range model is the 293-678-20.
Key Benefits
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Measures 50–80 mm outside dimensions.
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Provides 0.001 mm resolution for detailed metric measurements.
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Offers ±3 µm instrumental accuracy.
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Rapid 10 mm spindle feed per thimble rotation reduces positioning time.
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Covers the full 50–80 mm range in approximately three thimble rotations.
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ABSOLUTE linear scale retains the origin after power-off.
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Carbide-tipped, micro-lapped measuring faces support precision inspection.
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Non-rotating 6.35 mm spindle helps maintain controlled contact.
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Ratchet friction thimble provides a specified 5–12 N measuring force.
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IP65 protection helps protect the instrument against dust and coolant.
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MIN Hold supports minimum-value inspection tasks.
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Digimatic SPC output supports compatible data collection.
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Includes a 50 mm standard bar, SR44 battery and fitted plastic case.
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Suitable for measuring shafts, pistons, hubs and other cylindrical components.
For pricing and availability in Saudi Arabia, contact General Tech at +966 569 289 544 or mathews@generaltechsaudi.com.
Who This Product Is Best For
The Mitutoyo 293-668-20 is suitable for:
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Automotive engine and gearbox workshops
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Precision machine shops
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Aerospace MRO teams
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Oil and gas machining operations
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Pump and compressor service workshops
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Hydraulic equipment maintenance
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Production quality-control departments
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General industrial inspection teams
Typical applications include measuring pistons, crankshaft journals, camshaft journals, pump shafts, flanged hubs, sleeves, turned rings and other cylindrical components between 50 and 80 mm.
Its metric-only configuration makes it particularly suitable for workshops where measurements and production drawings are specified in millimetres.
How to Use / How It Works
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Prepare the surfaces: Clean the measuring faces and the workpiece before measurement.
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Set the origin: Place the supplied 50 mm standard bar between the measuring faces, close using the ratchet and establish the reference.
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Position the spindle: Open the micrometer quickly using the 10 mm-per-rotation spindle feed until the measuring faces are just beyond the workpiece size.
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Take the measurement: Keep the frame square to the measurement surface and close the spindle using the ratchet friction thimble.
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Read the display: Check the measurement at 0.001 mm resolution.
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Capture the result: Use MIN Hold when the inspection requires the minimum reading, or transfer the measurement through the Digimatic SPC output.
For repetitive inspection, verify the reference periodically with a suitable standard.
Frequently Asked Questions
What is the measuring range of the Mitutoyo 293-668-20?
The measuring range is 50–80 mm.
What resolution does the 293-668-20 provide?
It provides 0.001 mm resolution.
What accuracy does this QuickMike micrometer provide?
The specified instrumental error is ±3 µm. The measuring faces have 0.3 µm flatness and 2 µm parallelism.
How fast does the spindle move?
The spindle advances 10 mm per thimble rotation, allowing the 50–80 mm range to be covered in approximately three rotations.
What comes with the 293-668-20?
The standard package includes an SR44 battery, 50 mm standard bar and fitted plastic case.
Does the micrometer retain its zero after power-off?
Yes. The ABSOLUTE linear scale retains the origin after power-off, reducing the need for repeated zero-setting.
Is the 293-668-20 suitable for machining environments with coolant?
Yes. The -20 generation has an IP65 rating for protection against dust and coolant under the specified rating conditions.
Does it support SPC data output?
Yes. The 293-668-20 provides Digimatic SPC data output for compatible inspection and data-collection equipment.
Which QuickMike should I choose?
Choose according to the required measuring range. The 293-667-20 covers 25–55 mm, the 293-668-20 covers 50–80 mm, and the 293-669-20 covers 75–105 mm. For inch measurements in the corresponding larger range, the 293-678-20 is an option.
Is the 293-668-20 the same as the 293-668-22?
The -20 refers to the 2019 IP65 generation, while Mitutoyo America lists 293-668-22 as a newer US listing. Contact General Tech to confirm the version currently available before ordering.
Where can I buy the Mitutoyo 293-668-20 in Saudi Arabia?
Contact General Tech Saudi Arabia at +966 569 289 544 or mathews@generaltechsaudi.com for pricing, availability and product information.
