{"id":12812,"date":"2026-09-03T11:03:39","date_gmt":"2026-09-03T11:03:39","guid":{"rendered":"https:\/\/www.alcircle.com\/blog\/?p=12812"},"modified":"2026-10-07T02:49:07","modified_gmt":"2026-10-07T02:49:07","slug":"how-to-evaluate-pre-owned-aluminium-extrusion-press","status":"publish","type":"post","link":"https:\/\/www.alcircle.com\/blog\/how-to-evaluate-pre-owned-aluminium-extrusion-press","title":{"rendered":"How to evaluate a pre-owned aluminium extrusion press for capacity expansion"},"content":{"rendered":"\n

Expanding an extrusion plant does not always require a new press. A well-selected pre-owned extrusion press can add production capacity faster and with lower initial capital expenditure.<\/p>\n\n\n\n

However, the lower purchase price is only an advantage if the machine can reliably produce the required profiles at the intended output rate. Buying on tonnage, age or appearance alone can turn a capacity project into an expensive maintenance problem.<\/p>\n\n\n\n

Before evaluating equipment, define the target alloys, billet dimensions, maximum profile size, product weight per metre, tolerances, annual output and operating pattern. This production brief should determine the required capacity of the aluminium extrusion press.<\/p>\n\n\n\n

1. Match press tonnage to the intended product mix<\/h2>\n\n\n\n

Extrusion press tonnage<\/strong> is the maximum force the press can apply, but a higher number does not automatically mean better production. The required force depends on billet diameter, alloy, extrusion ratio, die geometry, billet temperature and desired extrusion speed.<\/p>\n\n\n\n

A press that is oversized for the normal product mix may consume unnecessary energy, while an undersized machine may run slowly, struggle with harder alloys<\/a> or restrict future product development.<\/p>\n\n\n\n

1.1 Tonnage is not a standalone spec<\/h3>\n\n\n\n

Two presses rated at the same tonnage can behave very differently in production depending on specific pressure (tonnage divided by ram area), container condition and stroke length. Always ask for the specific pressure figure, not just the headline tonnage.<\/p>\n\n\n\n

1.2 UST vs metric tons<\/h3>\n\n\n\n

Used-equipment listings mix units. A press rated in US short tons (UST) is not the same as one rated in metric tons (MT) – 1 UST \u2248 0.907 MT. When comparing two listings, convert to a single unit before concluding relative capacity.<\/p>\n\n\n\n

1.3 Worked example<\/h3>\n\n\n\n

For example, this 8 inch used aluminium extrusion press (1,800 UST)<\/a> listed on AL Biz may suit certain aluminium profile operations. Yet the 1,800 UST rating and 8-inch billet size are only starting points. Buyers should verify usable container dimensions, ram speed, stroke, specific pressure and compatibility with the planned alloys and dies before treating the headline spec as confirmation of fit.<\/p>\n\n\n\n

1.4 Indicative tonnage-to-capability guide<\/h3>\n\n\n\n

The table below is a general industry guide, not a substitute for manufacturer-specific data. Always confirm exact figures against the press’s original specification sheet.<\/p>\n\n\n\n

Aluminium extrusion press tonnage<\/strong><\/td>Typical billet\/container diameter<\/strong><\/td>Typical profile capability<\/strong><\/td>Common application segment<\/strong><\/td><\/tr>
500\u2013800 UST<\/td>4″\u20135″ (100\u2013127 mm)<\/td>Small-to-medium profiles<\/td>Light building products, general hardware<\/td><\/tr>
900\u20131,200 UST<\/td>5″\u20136″ (127\u2013152 mm)<\/td>Medium profiles, moderate hollow sections<\/td>General architectural, furniture, industrial<\/td><\/tr>
1,300\u20131,800 UST<\/td>6″\u20138″ (152\u2013203 mm)<\/td>Larger architectural and structural sections<\/td>Curtain wall, structural building products<\/td><\/tr>
2,000\u20133,500 UST<\/td>8″\u201310″ (203\u2013254 mm)<\/td>Large structural and multi-void profiles<\/td>Heavy structural, transport, rail<\/td><\/tr>
4,000+ UST<\/td>10″+ (254 mm+)<\/td>Very large or specialised profiles<\/td>Aerospace, defence, specialised heavy industry<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

2. Inspect the machine\u2019s condition under load<\/h2>\n\n\n\n

Request the machine’s serial number, manufacturing year, operating hours, maintenance records, overhaul history, original drawings and current production data before any site visit – incomplete documentation is itself a risk signal.<\/p>\n\n\n\n

2.1 Structural and hydraulic inspection<\/h3>\n\n\n\n

Inspect the main cylinder, platen, tie rods, container holder, crosshead, guides, seals and alignment. Look for hydraulic leakage, scoring, fatigue cracks, abnormal vibration and evidence of improvised repairs.<\/p>\n\n\n\n

2.2 Observed production trial<\/h3>\n\n\n\n

The press should ideally be observed during profile production. Record cycle time, pressure stability, extrusion speed and oil temperature. Check whether it reaches rated pressure without excessive leakage or overheating. Obtain recent quality results from representative profiles, not just the seller’s own samples.<\/p>\n\n\n\n

2.3 If the press has already been dismantled<\/h3>\n\n\n\n

If the machine has been dismantled, insist on inspection reports, operating videos and preservation records. Uncertainty at this stage should be reflected directly in the price and in a contingency line in your budget – do not assume “as last operated” condition without evidence.<\/p>\n\n\n\n

3. Evaluate the complete extrusion line<\/h2>\n\n\n\n

A press alone does not create saleable output. A used aluminium extrusion line<\/strong> may also require a billet heater or log furnace, hot saw, puller, run-out table, cooling system, stretcher, finish saw, ageing oven, die oven and material-handling equipment. Each component must match the press speed, billet size, profile length and plant layout.<\/p>\n\n\n

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<\/a>An apparently inexpensive press can become uneconomic if critical auxiliaries are missing or mismatched. <\/p>\n\n\n\n

3.1 Auxiliary equipment checklist<\/h3>\n\n\n\n