How Calibration Weights Are Manufactured – Step-by-Step Process at V-CARE IMPEX

At V-CARE IMPEX, we take immense pride in being one of India’s most trusted manufacturers of calibration weights and standard weights, supplying to industries across India, UAE, Saudi Arabia, Singapore, and Qatar.

In this blog, we’ll take you behind the scenes to show how calibration weights are manufactured with utmost accuracy, precision, and care at our state-of-the-art facility.

Precision calibration weights manufactured at V-CARE IMPEX using CNC machining and NABL-certified processes.

1. Selection of Raw Material

The manufacturing of calibration weights begins with high-grade stainless steel—typically AISI 304 or AISI 316L—chosen for its corrosion resistance, density uniformity, and non-magnetic properties. Each batch of material undergoes strict inspection to ensure density consistency and absence of surface defects, which are crucial for maintaining calibration accuracy.

2. Precision Machining and Shaping

Once approved, the stainless steel rods are cut, turned, and machined to form weights of specific nominal values (e.g., 1 mg to 50 kg).Using CNC lathes and precision milling machines, V-CARE IMPEX ensures that every weight achieves perfect dimensional accuracy as per OIML R111-1 standards.

3. Heat Treatment and Stress Relief

To enhance material stability, the weights undergo heat treatment to remove internal stresses developed during machining. This step prevents dimensional distortion over time, ensuring that the weight remains stable even under long-term usage or varying environmental conditions.

4. Surface Finishing and Polishing

After machining, weights are carefully polished and finished to achieve a mirror-like surface. Our specialized polishing process reduces surface roughness and eliminates contamination. For E2 and F1 Class calibration weights, ultra-fine polishing ensures minimum air buoyancy effect during calibration.

5. Initial Verification and Pre-Calibration Check

Each weight is checked for mass stability, magnetic susceptibility, and surface cleanliness. V-CARE IMPEX technicians use precision comparators and mass comparators to ensure every weight meets tolerance limits defined under OIML standards.

6. NABL Certified Calibration

At this stage, all weights are sent for NABL Accredited Calibration. Calibration is performed using high-precision mass comparators in a temperature-controlled environment (20 ± 0.5°C).Traceability is maintained to National and International Standards, ensuring compliance with ISO/IEC 17025.

V-CARE IMPEX provides 1-year and 2-year NABL Calibration Certificates with every weight or set, ensuring trust and reliability for laboratory and industrial applications.

7. Marking and Identification

Weights are then laser-marked or engraved with nominal values, class, and serial numbers (if applicable).This ensures easy traceability, especially for calibration laboratories and metrology departments.

8. Cleaning, Packaging, and Storage

Before final dispatch, all weights undergo ultrasonic cleaning to remove any residues. They are packed in ABS boxes, wooden cases, or aluminum boxes depending on the weight class and range. For example:

• F1 Class: Provided in wooden or ABS boxes

• E2 Class: Provided in aluminum or high-grade plastic boxes

• M1 Class: Packed in standard durable boxes

Each packaging ensures maximum protection against dust, moisture, and physical damage.

9. Quality Assurance and Final Inspection

Before leaving the V-CARE IMPEX facility, every calibration weight undergoes a final visual, dimensional, and mass stability check. Our ISO 9001:2015 certified quality control team ensures that only precision-tested, NABL-traceable weights are delivered to customers worldwide.

Why Choose V-CARE IMPEX for Calibration Weights?

✅ NABL Certified Calibration Facility

✅ Precision Manufacturing as per OIML Standards

✅ Global Supply Network across the Middle East and Asia

✅ Custom Weight Boxes and Engraved Markings

✅ Trusted by Laboratories, Industries, and Research Institutes

At V-CARE IMPEX, we combine precision engineering, international standards, and exceptional quality control to manufacture calibration weights that guarantee accuracy, reliability, and long-term stability.

Conclusion

The process of how calibration weights are manufactured requires a blend of technical expertise, quality control, and precision instruments. At V-CARE IMPEX, our focus on innovation and accuracy has made us one of the top manufacturers and exporters of calibration weights in India and across the Middle East.

To know more, visit: 🌐 www.vcareimpex.com

Frequently Asked Questions (FAQs)

1. What materials are used in calibration weight manufacturing?

Calibration weights are made using non-magnetic stainless steel (AISI 304 or 316L) to ensure corrosion resistance and long-term stability.

2. What standards do V-CARE IMPEX calibration weights follow?

Our calibration weights are manufactured as per OIML R111-1, ASTM, and NABL guidelines.

3. Are V-CARE IMPEX calibration weights NABL certified?

Yes, all our weights come with NABL Accredited Calibration Certificates, traceable to national standards.

4. Can I get custom engraving or packaging for my calibration weights?

Yes, V-CARE IMPEX offers custom laser engraving and premium packaging options such as ABS, wooden, and aluminum cases.