IWM 4 Piston Hydraulic Stair Cramps
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The IWM 4 Piston Hydraulic Stair Cramp (4.5 metre model) is a robust and precise machine designed for both open-plan and wedged stair construction. Built to handle stair widths between 800 mm and 1200 mm, it features four hydraulic cylinders that deliver smooth, parallel movement, powered by a motorised pump with a simple push-button starter. The easy-to-use lever control ensures consistent, accurate operation, while the eight cramping bars positioned at 500 mm centres provide excellent accessibility during assembly. Its heavy-duty welded frame and reinforced steel cramping fingers guarantee long-term durability, making it ideal for demanding workshop environments.
With a standard length of 4.5 metres, the stair cramp can be ordered in 500 mm increments to suit your specific requirements. The adjustable base can be fitted with wheels for easy movement or with adjustable feet for secure placement. Offering a clamp height of 400 mm and hydraulic pressure of approximately 10 tons, the machine ensures perfect parallel movement through its four hydraulic rams. It also provides flexibility with left- or right-hand starter and lever options at no extra cost. Operating on 380/400 V, 3-phase power, the IWM 4 Piston Hydraulic Stair Cramp is delivered within 4–6 weeks of order and weighs approximately 500 kg.
IWM 4 Piston Hydraulic Stair Cramp – 4.5 Metre
Description
Key Features:
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Suitable for stair widths from 800 mm to 1200 mm
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Equipped with four hydraulic cylinders ensuring precise parallel movement, powered by a motorised pump with push-button starter
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Simple lever control for smooth parallel opening and closing operations
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Eight cramping bars positioned at 500 mm centres for easy assembly access
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Heavy-duty welded frame and side rails, constructed from thick-gauge box steel
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Reinforced steel cramping fingers prevent deformation during use
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Base can be fitted with wheels for mobility or adjustable feet for stability
Technical Specifications:
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Length: 4.5 metres (standard), available in 500 mm increments
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Width: 840 mm minimum, expandable by 400 mm (maximum 1240 mm)
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Starter and lever: Left- or right-hand operation (free option per client preference)
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Hydraulic pressure: Approx. 10 ton
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Hydraulic rams: 4 units providing perfect parallel movement
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Clamp height: 400 mm
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Vertical clamping bars: 8, spaced at 500 mm centres
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Voltage: 380 / 400 V, 3-phase
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Delivery: 4–6 weeks from order
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Weight: Approx. SC4M 500 kg














