Description High-Capacity Cast Iron Block Weights for Industrial Calibration & Proof Load Testing Not got your size? Get in touch and we’ll be happy to help. Built for precision, compliance, and extreme durability — these M1-class cast iron block weights are the trusted choice across UK industries for scale calibration, LOLER proof load testing, and regulated weighing. Why Choose Our Cast Iron Block Weights? Whether you’re calibrating large-capacity industrial scales or performing heavy-duty load tests, our cast iron block weights offer the reliability and compliance you need. Engineered from dense, shot-blasted cast iron and finished with a durable, chip-resistant coating, each weight is designed for long-term use in harsh working environments. With stackable construction and forklift compatibility, these weights are easy to manoeuvre and store safely. Every unit is clearly marked with its nominal value, ensuring quick identification during audits or calibration checks. Trusted for Accuracy and Legal Compliance OIML Class M1 certified for use with non-automatic weighing instruments with ≥1g readability Precision tolerance of ±0.005% for consistent, verifiable results Compliant with UK regulations, including: Non-Automatic Weighing Instruments Regulations 2016 (Trade Use) LOLER 1998 (Proof Load Testing of Lifting Equipment) These weights are also available with an optional Trading Standards calibration certificate, ensuring full traceability and providing documented accuracy for regulated industries. This is ideal for businesses undergoing audits or working with third-party inspectors. Applications Across Key UK Sectors These high-capacity weights are not general-purpose — they are specialised tools that directly support regulatory compliance, risk reduction, and process efficiency: Manufacturing – Bulk ingredient weighing and finished goods control Warehousing & Logistics – Calibration of platform and pallet truck scales Transport & Freight – Verification of weighbridges and axle weighers Construction – LOLER-compliant proof load testing of cranes and hoists Pharma & Food Production – Ingredient accuracy for batch processing Mining & Heavy Industry – Verification of large-scale weighing systems and lifting gear Need UKAS traceability or specific calibration documentation? We can tailor to your compliance needs — just ask. Product Options & Specifications Capacity (kg) OIML Class Material Key Features 100 M1 Cast Iron Stackable, Forklift Compatible, Coated Finish 250 M1 Cast Iron Stackable, Forklift Compatible, Coated Finish 500 M1 Cast Iron Stackable, Forklift Compatible, Coated Finish 1000 M1 Cast Iron Stackable, Forklift Compatible, Coated Finish Please note: Images are for reference only. For actual product photos, please contact us. FAQs Are these weights legal for trade use in the UK?Yes. All options meet OIML Class M1 requirements and are suitable for trade use under the NAWI Regulations 2016. Can they be used for LOLER proof load testing?Absolutely. Their design and capacity make them ideal for verifying lifting equipment safety in line with LOLER 1998. Do you provide calibration certificates?Yes. We offer Trading Standards traceable calibration certificates upon request.
