Precision Vernier Caliper with Fine Adjustment Hardened Stainless Steel, Optional Titanium Coating, Multiple Ranges & Scale Options Hoshing

Industrial-grade high-precision mechanical vernier caliper equipped with an independent fine adjustment mechanism for micrometer-level precise positioning, designed for precision machining, mold making, QC laboratories and other high-accuracy applications. Crafted from high-grade hardened stainless steel, with optional titanium coating upgrade for enhanced surface hardness and wear resistance. Available in 150mm, 200mm and 300mm measuring ranges, with metric-only, metric/imperial dual-scale and fractional scale versions. Supports 4-in-1 outside, inside, depth and step measurement. Purely mechanical design requires no batteries, delivering reliable performance across industrial environments. Single-unit retail supported with no minimum order quantity.

High Precision

ISO/CE Certified

Industrial Durability

OEM/ODM Support

Fast Global Delivery

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Description

The H-305 series fine-adjustment vernier caliper is a professional-grade mechanical measuring tool developed for high-precision measurement scenarios. Its core upgrade is the independent fine-feed adjustment mechanism, which solves the common pain point of standard vernier Calipers — overshoot and imprecise alignment during fast sliding. It enables slow, micrometer-level feed and accurate jaw alignment, making it particularly suitable for precision parts, mold cavities and tight-tolerance quality inspection.

The entire caliper is manufactured from high-grade stainless steel with special hardening treatment, featuring high rigidity, low deformation and stable measurement accuracy even after long-term high-frequency use. An optional titanium nitride (TiN) coating upgrade is available to significantly boost surface hardness and wear resistance of the beam and jaw surfaces, greatly extending service life and reducing long-term ownership cost for high-volume inspection stations.

Precision Fine Adjustment Mechanism for Micrometer-Level Alignment

Equipped with an independent fine-adjustment lock and feed structure: operators first slide the main carriage to the approximate measuring position, lock it, then turn the fine-adjustment knob to advance the measuring jaws slowly and smoothly. This effectively eliminates measurement errors caused by manual overshoot, greatly improving repeatability and accuracy for tight-tolerance workpieces — a key advantage for precision machining, laboratory QC and mold inspection.
High-Grade Hardened Stainless Steel with Optional Titanium Coating

Both the main beam and measuring jaws are machined from high-purity hardened stainless steel, delivering excellent deformation resistance, wear performance and corrosion protection. It withstands daily workshop exposure to oils, coolant splashes and frequent opening-closing cycles. An optional titanium nitride (TiN) surface coating upgrade further increases surface hardness of the guide rail and jaw working faces, reduces sliding friction, and significantly extends calibration intervals and overall tool life in high-volume, high-frequency inspection environments.
Multiple Scale Configurations for Diverse Application Needs

Three scale system versions are available to match different industry and regional usage habits:

Metric-only version: 0.02mm resolution, for general machining and quality inspection
Metric/imperial dual-scale version: 0.02mm / 0.001" resolution, for export trade and international engineering projects
Fractional scale version: 0.05mm / 1/128" resolution, for woodworking and imperial-dimension manufacturing

All graduations are produced with a precision etching process, delivering sharp, permanent markings that resist wear and fading for clear, error-free reading over years of use.

4-in-1 Versatile Measurement for Full-Scope Dimensional Inspection

A single caliper performs four common dimensional measurement tasks: outside diameter (OD), inside diameter (ID), depth and step dimensions. Precision-lapped jaw faces ensure full, parallel contact with workpiece surfaces, delivering stable, trustworthy readings across all measurement modes to meet dimensional inspection requirements in precision machining, mold making, automotive components, aerospace parts and more.

Core Retail Selling Points

✅ Single-unit retail available with no minimum order quantity, suitable for individual technicians, laboratories and workshop restock

✅ Independent precision fine adjustment mechanism for micrometer-level accurate feed, greatly improving tight-tolerance measurement accuracy

✅ High-grade hardened stainless steel construction, high rigidity, deformation-resistant, rust and wear proof for heavy industrial use

✅ Optional titanium coating surface upgrade for further improved hardness and wear resistance, extending tool service life

✅ Three measuring ranges: 0–150mm / 0–200mm / 0–300mm to match different workpiece sizes

✅ Three scale options: metric-only, metric/imperial dual-scale, fractional imperial to fit global application habits

✅ Precision-etched permanent graduations, sharp and clear, resistant to wear and fading

✅ 4-in-1 measurement: outside diameter, inside diameter, depth and step dimensions in one tool

✅ Purely mechanical vernier design, no batteries required, reliable in dusty and oily workshop environments

✅ Cost-effective high-precision workshop measuring tool with low long-term maintenance cost

✅ 12-month retail warranty against manufacturing and accuracy defects

Standard Specification

Order No.	Measuring Range	Resolution	Accuracy	Feature
H-305-151	0 – 150mm / 0 – 6"	0.02mm	±0.03mm	Metric Only
H-305-201	0 – 200mm / 0 – 8"	0.02mm	±0.03mm	Metric Only
H-305-301	0 – 300mm / 0 – 12"	0.02mm	±0.04mm	Metric Only
H-305-152	0 – 150mm / 0 – 6"	0.02mm / 0.001"	±0.03mm	Dual Scale
H-305-202	0 – 200mm / 0 – 8"	0.02mm / 0.001"	±0.03mm	Dual Scale
H-305-302	0 – 300mm / 0 – 12"	0.02mm / 0.001"	±0.04mm	Dual Scale
H-305-155	0 – 150mm / 0 – 6"	0.05mm / 1/128"	±0.03mm	Fractional Readout
H-305-205	0 – 200mm / 0 – 8"	0.05mm / 1/128"	±0.03mm	Fractional Readout
H-305-305	0 – 300mm / 0 – 12"	0.05mm / 1/128"	±0.04mm	Fractional Readout

Target Retail Buyers

Precision machining operators, mold and die technicians, QC laboratory inspectors, aerospace component measurement staff, automotive precision parts inspectors, research institution technicians, vocational metrology training instructors, high-precision workshop owners.

Applications

CNC Machining

Ideal for CNC lathe, milling and machining center operations, ensuring high-precision dimensional control and reliable tool holding for mass production.

Quality Control Labs

Suitable for quality inspection departments and calibration labs, providing accurate measurement data to verify product compliance with ISO and industry standards.

Mold & Die Making

Perfect for mold and die workshops, where micron-level precision tools and gauges are essential for complex cavity machining and final inspection.

OEM/ODM Projects

Customizable solutions for OEM and ODM manufacturing partners, offering tailored measuring tools and CNC accessories to meet unique production requirements.

Automotive Manufacturing

Designed for automotive component production lines, ensuring consistent precision and durability in engine parts, transmission components and assembly processes.

Aerospace & Precision Engineering

Ideal for aerospace and defense manufacturing, where ultra-high precision instruments and reliable tool holders meet strict quality and safety requirements.