Mitutoyo 369-353-30 | Non-Rotating Spindle Disc Micrometer | 3–4 in, IP65, 20 mm Disc
The Mitutoyo 369-353-30 is a Series 369 IP65 inch/metric disk micrometer with a non-rotating spindle, 20 mm measuring disks and a 3-4" (76.2-101.6 mm) measuring range. Genuine Mitutoyo from General Tech, authorised distributor in Saudi Arabia. Request a quote for the Mitutoyo 369-353-30 for precision measurement applications.
Part No.: 369-353-30
Phone: +966 531 321586
Product Overview
Measuring gear teeth, thin flanges and soft materials with a standard micrometer can be difficult because flat anvils cannot easily reach between teeth, while a rotating spindle can twist or mark the workpiece. The Mitutoyo 369-353-30 uses thin 20 mm measuring disks to reach into narrow spaces across a 3-4" (76.2-101.6 mm) measuring range.
The non-rotating spindle eliminates torque on the workpiece, helping prevent deformation and wear. IP65 protection allows the micrometer to be used in environments where dust and coolant may be present. It is genuine Mitutoyo, supplied through an authorised distributor.
Typical applications include gear manufacturers checking root tangent length, measuring thin flanges, ribs and narrow recesses, and inspecting soft materials such as rubber, felt, cardboard and fabric. Disk micrometers are designed for measuring the root tangent length of spur and helical gears and are also suitable for thin sections and soft materials. The Digimatic data output allows readings to be transferred to SPC software and data collection systems.
For the best accuracy, allow the micrometer and workpiece to reach the same temperature before measuring. Avoid holding the frame for long periods because heat from your hand can cause the frame to expand. This is particularly important with larger micrometer frames, where small temperature changes can affect the measurement.
For ranges that do not start at zero, the micrometer is set using a standard bar. Confirm your gear module or part size with our team so we can recommend the appropriate range. General Tech can also arrange calibration.
Comparing options? See the Mitutoyo 369-352-30, which covers 2-3" (50.8-76.2 mm), before you order.
Key Benefits
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20 mm measuring disks reach into narrow recesses
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Designed for measuring gear root tangent length
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Non-rotating spindle eliminates torque on the workpiece
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IP65 protection for shop-floor environments
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3-4" (76.2-101.6 mm) measuring range
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0.00005" / 0.001 mm resolution
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Digimatic data output for SPC and data collection
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Genuine Mitutoyo from an authorised distributor in Saudi Arabia
Call +966 531 321586 for pricing and stock availability.
Who This Product Is Best For
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Gear manufacturers checking root tangent length
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Manufacturers measuring thin flanges, ribs and narrow recesses
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Quality-control teams measuring soft materials such as rubber, felt and cardboard
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Machine shops requiring disk-style micrometer measurement
How to Specify & Install It
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Clean the measuring disk faces before measurement.
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Set the origin using the measuring disks or an appropriate standard bar.
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Position the disks on the part and apply measuring force using the ratchet stop.
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Read the measurement on the display or transfer the value through the data output.
Frequently Asked Questions
What is a disk micrometer used for?
A disk micrometer is mainly used to measure the root tangent length of spur and helical gears. It is also suitable for measuring thin sections, narrow recesses, flanges and soft materials such as felt, rubber, cardboard and fabric.
What size are the measuring disks?
The Mitutoyo 369-353-30 has 20 mm diameter measuring disks designed to reach into narrow measurement areas.
Why does it have a non-rotating spindle?
The non-rotating spindle eliminates spindle rotation against the workpiece, reducing torque and helping prevent deformation or wear during measurement.
Should I choose the 369-353-30 or the 369-352-30?
The Mitutoyo 369-353-30 covers 3-4" (76.2-101.6 mm), while the 369-352-30 covers 2-3" (50.8-76.2 mm). Choose the range that matches the dimensions of the parts you need to measure.
How should I care for the instrument?
Wipe the measuring faces clean after use and store the instrument in its case away from excessive heat, humidity and coolant. Remove the battery if the instrument will be stored for an extended period. Regular calibration helps maintain measurement reliability.
Can the instrument be calibrated?
Yes. General Tech Saudi provides calibration services for dimensional instruments. Ask our team about calibration when you order.
Can you supply other Mitutoyo instruments in the same order?
Yes. General Tech supplies a wide range of Mitutoyo micrometers, bore gauges, calipers and indicators. Tell our team what you need and they can quote the instruments together.
Is genuine Mitutoyo available in Saudi Arabia?
Yes. General Tech is an authorised Mitutoyo distributor. Contact the team for current pricing, availability and lead time.
Call +966 531 321586 for pricing, stock availability and product support.
