IMPORTANT PLEASE NOTE We are not registered for VAT so the prices you see are the prices you pay!

If you have any questions or wish to discuss product details, please call and ask to speak to Art. Please note there is a 4 to 6 week waiting list from placing Furnace and Tong orders until their dispatch due to demand.

STORE CLOSURE DATES Due to a high workload of booked metal casting courses and sign commissions any orders placed during 2nd March to the 6th March inclusive will be on hold and dispatched on 9th March dependant upon stock levels. This will also add a week to the above tong and furnace lead times.

 A good value for money 4 Scale contraction /Shrinkage rule.
(Both sides of rule shown in photograph)

Castings are always smaller in dimensions than the pattern from which they are made, because as the metal cools from its solidification temperature to room temperature, thermal contraction /shrinkage occurs.

Patternmakers allow for this contraction /shrinkage by making patterns larger in dimensions than the required castings by an amount known as the “contraction / shrinkage allowance”. This is done by making use of specially engraved rules, known as “contraction or shrinkage rules”, the dimensions of which incorporated a contraction /shrinkage allowance such as 1 in 75 for aluminium alloys, or 1 in 96 for iron castings.
Due to computer controlled machines being used for pattern-making shrinkage rues are sometimes expressed as a percentage allowance.