Mitutoyo 103-137 Outside Micrometer, Range 0-25mm
The Mitutoyo 103-137 is a precision outside micrometer with a 0–25 mm measurement range and 0.01 mm graduation, manufactured by Mitutoyo — the world's leading maker of dimensional measuring instruments. This is the foundational micrometer in Mitutoyo's 103 series, designed for everyday precision measurement in machine shops, quality control departments, and inspection laboratories across the UAE.
Built to ISO 3611 and DIN 863 standards, the 103-137 delivers ±2 µm accuracy with carbide-tipped measuring faces that resist wear from repeated contact with hardened steel, aluminium, and other metals. The micro-lapped measuring surfaces ensure full-face contact for reliable, repeatable readings — critical when checking shaft diameters, wall thicknesses, and turned component dimensions to tight tolerances.
✦ Key Features
Carbide-Tipped Measuring Faces — Micro-lapped for 0.6 µm flatness. Resists wear far longer than hardened steel faces, maintaining accuracy over thousands of measurements.
Ratchet Thimble — Ensures consistent 5–10 N measuring force on every reading, eliminating operator-dependent variation.
Spindle Lock — Clamp the spindle at any position for comparative measurements or setting gauges without losing the reading.
Satin Chrome Finish — Anti-glare barrel and thimble for easy reading under shop-floor fluorescent and LED lighting.
Heat-Insulating Plates — Mounted on the frame to minimise thermal expansion from hand contact during extended measurement sessions.
📐 Technical Specifications
| Model | 103-137 |
| Range | 0–25 mm |
| Graduation | 0.01 mm |
| Accuracy (MPE) | ±2 µm |
| Flatness | 0.6 µm |
| Parallelism | 2 µm |
| Measuring Faces | Carbide-tipped |
| Thimble Type | Ratchet |
| Standard | ISO 3611 / DIN 863 |
| Origin | Mitutoyo (Japan) |
🏭 Applications
CNC Machining — Verify turned shaft diameters, bore dimensions, and step lengths between machining operations.
Quality Control — Check received components against drawing tolerances before assembly.
Tool and Die Making — Measure punch diameters, die clearances, and precision-ground surfaces.
Maintenance and MRO — Check bearing journals, valve stems, and piston diameters during overhaul.
Training — The standard teaching micrometer in technical colleges across the Middle East.
Why Buy from San Tools?
✅ Authorised Mitutoyo Distributor — Genuine product with full manufacturer warranty.
✅ In Stock in Dubai — Ships same-day from our Al Quoz warehouse.
✅ Calibration Certificates — Traceable certificates for ISO 9001 and IATF 16949 audits.
✅ Free UAE Delivery — On orders over AED 500.
✅ Expert Support — 38 years matching the right instrument to the right application.
Frequently Asked Questions
Is this a genuine Mitutoyo product?
Yes. San Tools is an authorised Mitutoyo distributor in the UAE. Every micrometer ships with Mitutoyo packaging and an inspection certificate.
Does the 103-137 come with a setting standard?
The 0–25 mm range zeroes against its own anvil and does not require a setting standard. Models from 25 mm upward include one.
Can I get a calibration certificate?
Yes. We provide traceable calibration certificates on request — essential for ISO 9001, IATF 16949, and AS 9100 quality systems.
What is the difference between the 103-137 and 103-137 (old model)?
The current production 103-137 features an updated ratchet mechanism and improved carbide face lapping. Dimensions and specifications remain the same.