Blum AVENTOS HF Centre Hinge 134° Set Wood Unsprung Screw-On (HI20F78Z50T)

The Blum AVENTOS HF top 78Z5500T12 hinge set provides the unsprung outer and centre hinges required for a screw-on bi-fold front. Intended for wooden fronts and wide aluminium frames, this genuine nickel-plated set contains four CLIP top hinges and six 0mm horizontal-cam mounting plates. Two 120° outer hinges connect the upper front to the cabinet, and two centre hinges connect the upper and lower panels so they fold together as the HF top lift opens.

Complete Screw-On Hinge Set

Blum set 78Z5500T12 combines matched unsprung hinges and plates for screw-on installation. The lift mechanism controls front movement, so do not substitute conventional sprung hinges. Narrow aluminium frames require a separately specified set.

Set Contents

• 2 × CLIP top 120° unsprung screw-on hinges — 70T5550.TL
• 2 × CLIP top unsprung screw-on centre hinges — 78Z5500T
• 6 × 0mm horizontal-cam mounting plates — 175H3100

The centre hinges have a 134° folding angle; the outer hinges are 120°, and final movement depends on the full system.

Front and Fixing Compatibility

For wooden fronts, Blum specifies chipboard screws 609.1x00. For wide aluminium frames, it specifies countersunk self-tapping screws 660.0950. Screws are not included in Blum's listed 78Z5500T12 set contents and must be sourced separately. Wide aluminium-frame planning may require an additional cruciform plate at each centre hinge, so check frame-frieze width and current Blum planning guidance before ordering or machining.

Fitting and Ordering Notes

This is not a complete lift system: the application also requires the selected HF top lift mechanisms, telescopic arms, cover caps and front fixings, and SERVO-DRIVE electrical parts are separate. Confirm an HF top wooden-front or wide-aluminium-frame application, select mechanisms and arms from current Blum planning data, use the current drilling positions and specified screws, install the hinges and plates in their planned positions, then assemble and adjust the system and check alignment, folding movement and secure engagement. The image shown is a representative product image; confirm the part number before ordering.

Frequently Asked Questions

Is this only a pair of centre hinges?

No. Blum 78Z5500T12 is a complete hinge set containing two outer 120° unsprung hinges, two unsprung centre hinges and six 0mm mounting plates.

Does the whole AVENTOS HF top front open to 134°?

No. It is the centre-hinge folding angle. The outer hinges are 120°, and complete front travel depends on the planned system.

Can the set be used with aluminium frames?

Yes, for wide aluminium frames. Narrow frames need the separate narrow-frame set. Check whether additional cruciform plates are required at the centre hinges.

Are the hinges sprung?

No. Both the 70T5550.TL outer hinges and 78Z5500T centre hinges are unsprung for use in the planned AVENTOS HF top lift application.

Are fixing screws included?

Not in Blum's listed set contents. Blum specifies 609.1x00 chipboard screws for wooden fronts and 660.0950 self-tapping screws for wide aluminium frames. These must be sourced separately.

For narrow aluminium-frame applications, see the Blum AVENTOS HF narrow-frame hinge set. Browse the Blum AVENTOS Eclipse Lift Systems range or the dedicated AVENTOS HF top collection for compatible mechanisms and components.