Jewellery Tools UK — Hand Tools for Jewellers & Silversmiths

Heavy Duty Perforated Casting Flask, X-Large 5" x 7", Stainless Steel, 1/8" Wall, Vacuum Casting

Heavy Duty Perforated Casting Flask, X-Large 5" x 7", Stainless Steel, 1/8" - Main image
$23.67 $36.99 In stock

Category: Jewellery Making Tools

This extra-large perforated casting flask enables efficient vacuum casting of substantial jewellery trees for professional UK jewellers.

What it does

Designed for demanding production, this flask ensures consistent vacuum distribution across larger investment moulds thanks to its precisely spaced perforations. The robust 1/8-inch stainless steel wall construction withstands the thermal stresses of kiln burnout cycles without warping. Its substantial 5" x 7" internal volume accommodates significantly more components per casting pour, streamlining your workflow and increasing workshop output for complex or multi-piece designs.

How to use it

  • Prepare your wax tree and place it centrally within the flask.
  • Securely attach the flask to your vacuum casting machine.
  • Pour investment, allow to set, and proceed with burnout and casting.

Who it's for

This flask is essential for professional jewellers, silversmiths, and small-scale production studios in the UK looking to expand their casting capacity. It replaces smaller flasks, allowing for more efficient casting of larger items or multiple components simultaneously, thereby reducing setup time and increasing throughput.

What's in the box

1 x Heavy Duty Perforated Casting Flask, 5" x 7"

Our promise

UK-stocked at our Birmingham workshop. Same-day dispatch on orders placed before 2pm. Free UK delivery on orders over £30. 30-day returns — try it at the bench.

Before you pay

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When it ships

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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If you need a refund

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Alexander O. ★★★★★

The 1/8" wall on this flask feels solid and well-built, and the perforations let my vacuum setup work perfectly. I've already cast a full tree of silver rings with zero issues. Exactly what I needed for larger production runs.

Christopher S. ★★★★★

I was genuinely surprised how much a 5" x 7" flask can hold once you attach a big tree, and the perforations let the vacuum pull through evenly without any sagging. The stainless steel is thick enough that it doesn't warp under repeated heating, which has saved me a lot of wasted casts. Perfect for

Christopher ★★★★★

The 1/8" wall is a proper chunk of steel, so this flask takes a beating without flexing. I fit a full 5x7 tree with no struggle and the perforations let vacuum pull through evenly, casting clean every time.