Hexagonal & Bar Weights

  • Hexagonal weights available in 0.5kg, 1kg and 2kg

  • Bar weights available in 5kg, 10kg , 20kg and 25kg versions. 

  • Supplied painted in Matt Black etch primer.

  • Accuracies optoins offered on all the weights are M1, M2, M3 and Trade. 

  • Weights can be balanced to suit your application and will comply with Weights Regulations 1986 for Trade Weights, or OILM R111 2004(E) for Test Weights. 


Slotted Weights (Kg)

  • Slotted Weights available in 0.5kg, 1kg, 2kg, 5kg, 10kg and 20kg.

  • Also available are 0.5kg and 1kg Hanger Weights 

  • Supplied painted in Matt Black etch primer.

  • Calibration options offered on all the weights are M1, M2, M3,Trade Approved and UKAS Accredited. 



Block Weights & Pallet Truck Weights

  • Available in 100kg, 200kg, 250kg, 500kg, 1000kg and 2000kg.

  • Supplied painted in red oxide etch primer as standard though other finishes can be arranged.

  • Block Weights are manufactured and calibrated to comply with OILM R111 2004(E).

  • Typically used to load test Cranes, Weigh Bridges, Lifts and Hydraulic Lifting Equipment.

  • We can manufacture larger weights for cranes with extremely large lifting capacities and for load testing offshore cranes. 


Roller Weights

  • Available in 100kg, 250kg & 500kg.

  • Supplied with standard or counterbalanced handles for easier handling.

  • Supplied with Trading Standards Certifcate of Calibration.

  • Forged Handles are strength tested by an independent test house.

  • Load Test Certificates supplied free of charge.

​For bespoke weights or sinker weights up to a maximum of 8500kg's, contact us.



Cast Iron Test Weight
Calibration Weight
500kg M1 roller weight
Cast Iron Calibration Weight

Calibration Test Weights


We are a leading UK manufacturer of Test Weights. You can now purchase our competitively priced weights online at www.JWSweights.co.uk . The complete range is traceable to National Standards.  

We manufacture a wide range of Test and Trade Calibration Weights all of which can be stamped and certified to comply with customer ISO9001 quality systems. Bar Weights are calibrated in-house in our own Metrology Department, equipped with both Sartorius

and Mettler Toledo scales. Our scales are calibrated using certified F1 stainless steel test weights and serviced under a UKAS accredited service contract.  

Cast Iron Calibration Weight