The Blum AVENTOS HF 20F7051 opening-angle stop restricts a correctly planned legacy HF bi-fold lift system to a 104° opening angle. It is intended for installations where the full opening movement would conflict with a ceiling, cornice, lighting feature or another overhead obstruction.

The stop changes the maximum opening position; it does not supply lifting force, replace system adjustment or guarantee collision protection. Check the complete front path and available clearance before installation.

For legacy AVENTOS HF

Part 20F7051 belongs to the original AVENTOS HF programme. Blum lists it in both standard BLUMOTION and SERVO-DRIVE HF planning for wooden fronts, wide aluminium frames and narrow aluminium frames.

Do not confuse legacy AVENTOS HF with AVENTOS HF top. HF top mechanisms and arms use a different component generation, and visual similarity is not proof of compatibility.

104° restricted opening

The stated 104° is the resulting restricted opening angle specified by Blum. It is not a load rating, adjustment range or amount subtracted from the normal movement. For a more restrictive legacy HF option, Blum lists the separate 20F7011 opening-angle stop at 83°.

Select the angle only after checking the front's complete travel, handle projection, ceiling, cornice and adjacent fittings. An opening-angle stop is a planning accessory and must not be used to compensate for incorrect cabinet dimensions or an unsuitable mechanism and arm combination.

Key features

• Genuine Blum AVENTOS HF opening-angle stop
• Blum part number: 20F7051
• Stock code: HI20F7051
• Restricts planned opening to 104°
• For original legacy AVENTOS HF bi-fold systems
• Listed for standard BLUMOTION and SERVO-DRIVE HF planning
• Suitable across verified wooden and aluminium-frame HF applications
• Colour: dark grey (TGR)
• Separate from the 83° stop, part 20F7011

Product details

Planning and fitting

1. Confirm the application uses the original AVENTOS HF system, not HF top.
2. Measure the available opening clearance and verify that a 104° limit is suitable.
3. Confirm the required quantity from current Blum planning and Hart pack data.
4. Fit the stop only in the position shown by Blum's current assembly instructions.
5. Operate the complete front slowly after fitting and check all clearances.
6. Recheck lift adjustment, front alignment and secure engagement before use.

Questions and answers

What opening angle does 20F7051 provide?

It restricts the planned legacy AVENTOS HF opening angle to 104°.

When is a 104° stop useful?

It can be planned where a ceiling, cornice, light or other overhead feature limits the available front travel. Measure the actual clearance first.

Is this the 83° version?

No. The separate legacy HF 83° opening-angle stop is Blum part 20F7011.

Can it be used with SERVO-DRIVE?

Blum lists 20F7051 in both standard and SERVO-DRIVE legacy HF planning. The remaining system components must still match the chosen configuration.

How many stops are supplied or required?

Hart's verified pack quantity is 1 piece per unit purchased. Use current Blum planning to determine the quantity required for the application.

Will it fit AVENTOS HF top?

Do not assume compatibility. Part 20F7051 is documented for the original AVENTOS HF system; HF top uses a different component generation.

For a more restrictive opening, see the Blum AVENTOS HF 20F7011 83° stop. Browse the Blum AVENTOS HF and HF top range for mechanisms, arms and accessories.