The Blum AVENTOS HF top 22F3900 telescopic arm set provides the long linkage required for two-part bi-fold fronts in symmetrical-front cabinets from 840 to 1200 mm high. The package contains two symmetrical nickel-plated steel arms that connect the separately chosen HF top lift mechanisms to the corresponding front hardware.

This is the tallest arm option in the current AVENTOS HF top range. It is a system component, not a complete lift.

For tall 840–1200 mm HF top cabinets

Use part 22F3900 for symmetrical fronts where the cabinet height falls between 840 and 1200 mm. The lower part of this range overlaps with the 22F3500 arm option, so confirm the correct geometry using Blum's current planning information rather than choosing solely from a rounded nominal height.

For an asymmetrical bi-fold front, calculate theoretical cabinet height from twice the upper-front height plus the applicable gaps. Select the arm from that calculated value instead of applying the 840–1200 mm overall-height range directly.

What is supplied?

• 2 × symmetrical AVENTOS HF top telescopic lever arms

The listing does not include lift mechanisms, cabinet hinges, centre hinges, mounting or adapter plates, front-fixing hardware, cover caps, screws or SERVO-DRIVE equipment.

Product specifications

Pair with the correct mechanism strength

Combine the 22F3900 arm set with the appropriate AVENTOS HF top 22F2500 or 22F2800 lift-mechanism set. Mechanism selection is based on Blum's power-factor calculation using cabinet height, or theoretical cabinet height for asymmetrical fronts, multiplied by the combined weight of both fronts including handles.

Do not infer mechanism strength from the arm length. The same 22F3900 arm range can be used with different mechanism strengths when the completed cabinet calculation supports that selection.

Complete the HF top installation

The finished system also requires the specified cabinet and centre hinges, suitable mounting plates, lever-arm adapter plates, front-fixing hardware and a matching cover-cap set. If SERVO-DRIVE is required, plan the compatible drive unit, cabling, power components, switches and powered cover set separately.

Selection checklist

1. Confirm that the system is AVENTOS HF top, not original AVENTOS HF.
2. For symmetrical fronts, verify cabinet height is within 840–1200 mm.
3. For asymmetrical fronts, calculate theoretical cabinet height using Blum's current method.
4. Match MPN 22F3900, Hart SKU HI22F3900 and barcode 9009494771671.
5. Select the lift mechanisms separately using the complete power-factor calculation.

Frequently asked questions

Are two telescopic arms included?

Yes. Blum specifies two symmetrical lever arms in the 22F3900 set.

What cabinet height does 22F3900 cover?

It covers 840–1200 mm for symmetrical fronts. Asymmetrical fronts require selection using theoretical cabinet height.

Are the two arms handed?

No separate handed design is specified. The arms are symmetrical and the supplied pair is used across both cabinet sides.

Does the set include lift mechanisms?

No. The compatible HF top mechanism set must be chosen separately according to the calculated power factor.

Is this the same as original HF part 20F390?

No. Part 22F3900 belongs to AVENTOS HF top and covers a different documented height range. Do not claim interchangeability with 20F390.

Can it form part of a SERVO-DRIVE installation?

Yes, when used within a correctly planned HF top SERVO-DRIVE system. This listing itself contains only the two mechanical arms.

Browse the Blum AVENTOS HF top range for mechanisms and related parts.