User Guide

Operating forces for standard torque hinges / torque stays for doors and lids

• The graph shows the median value (catalogue specification) as a solid line, and the range from minimum to maximum as a shaded area.
• For heavy lids and doors, we recommend using one-way torque hinges (see "Operating doors and lids with one-way torque hinges").

Operating force for doors and lids using one-way torque hinges

• One-way torque hinges (unidirectional torque) do not generate torque in the lifting direction, meaning the only force required is to physically lift the lid or door.
• As shown clearly in the graph, much less force is needed compared to standard torque hinges.
• For particularly heavy lids, we recommend considering lift-assist products instead of torque hinges.

Door/lid operating force with the HG-TQJD hinge

• The HG-TQJD is a one-way torque hinge, meaning no torque is applied in the lifting direction — only the force to raise the lid is needed.
• As clearly shown in the graph, it requires less force to lift than a standard torque hinge.

Door/lid operating force for the HG-PA

• The graph compares the operating force both with and without the use of lift-assist hinges.
• A negative operating force means the door is exerting force in the opening direction (a small negative value indicates a balanced state).

For example

The graph shows that the operating force turns negative from around 15°, and since the value is small, this is considered optimal.

The difference between using a lift-assist hinge and not using one is substantial, clearly showing the hinge’s effectiveness.

There is a difference of approximately 27N when comparing the respective operating forces at 0°.

• Operating force with assist hinge: approximately 5N
• Operating force without assist hinge: approximately 32N

Operating force for doors and lids using S-AT and S-ATH stays

• The graph shows operating forces both with and without S-AT stays.
• In theory, the closer the lid's operating force is to zero, the lighter the feel. If the force is negative during opening, the lid may open on its own.
• If resistance is present elsewhere (e.g., at the hinges), whether or not the lid opens depends on the balance between forces.

Swivel torque hinge operating force

• With horizontally opening lids or doors (i.e., rotating horizontally), the mass of the lid or door is theoretically irrelevant, so the operating force remains constant regardless of the opening angle.

Lid moment for general torque hinges / torque stays

• If the total minimum torque is greater than the lid or door moment, the lid will stop in place (free stop).
• Torque values shown are lower limit specifications.

For example

For a product with a torque value of 5N·m ±20%, the solid line represents the lower limit (-20%) of 4N·m, and the shaded area indicates the range up to 6N·m (+20%).

It is best to bring the total minimum torque as close as possible to the lid/door moment, as this results in a lighter operating feel.

Lids and doors moment using HG-TQJD Hinges

• If the soft-close starting angle (which equals the torque value) is smaller than the lid moment and within the self-opening range, soft-close functionality will be activated.
• If the torque value is larger than the lid moment, the lid will stop in place (free stop).
• For a lighter feel, the torque value and the lid moment should be as close as possible.

Operating force for doors and lids using HG-PA and HG-JH210 hinges

• If the lid moment > total hinge torque: the lid will fall naturally (closing force).
• If the lid moment < total hinge torque: the lid will not fall naturally (opening force).

For example

From approximately 15°, the total hinge torque exceeds the lid moment.

As the total hinge torque exceeds the lid moment, the lid will not drop automatically beyond 15°.

Please note: even if the total hinge torque exceeds the lid moment, if the difference is too great, the lid may open by itself. Therefore, a smaller difference is preferable, as shown in the graph on the left.

At around 0°, the total hinge torque is lower than the lid moment.

The lid therefore drops automatically. This product range is equipped with a damper, allowing lids to close slowly.

Please note: if the total hinge torque is greater than the lid moment at 0°, it may cause the lid to float, making it more difficult to use. Since this product is equipped with a damper, it is preferable for the total hinge torque to be lower around 0°.

Please note: if you are unable to achieve the desired results, consider adjusting the centre of gravity. The aforementioned conditions are merely what we consider ideal.
It may still be possible to use this product even if not all these conditions are met. Please make sure to check on working or testing equipment.

What are the minimum/maximum values for hinge torque adjustment?

• Certain products allow for adjustments of ±5%. The graph displays values adjusted by ±5% from the baseline.
• The graph does not take into account torque variation for this product (±10%).

Lids and doors moment using S-AT and S-ATH stays

• If lid moment > S-AT stay's retention torque: lid will drop automatically (force acts in the closing direction).
• If lid moment < S-AT stay's retention torque: lid will not drop automatically (force acts in the opening direction).

For example

From approximately 10°, the S-AT stay's retention torque exceeds the lid moment.

As the S-AT stay's retention torque exceeds this threshold, the lid will not drop automatically beyond 10°.

Please note: Furthermore, it is advisable for the lid's operating force to always be positive (0N or more) during opening.

Around 0°, the S-AT stay's retention torque is lower than the lid moment.

The lid therefore drops automatically.

Please note: if the S-AT stay’s retention torque is greater than the lid moment at 0°, the lid may ‘float’, making it harder to use.

Please note: this graph shows only the conditions we consider ideal. It may still be possible to use the product even if not all conditions are met. Please verify using actual equipment or test rigs.

Installation position	Xa	Ya	Xb	Yb	Features
1	30	-10	123	-12.5	A suitable installation position for L-shaped lids (with the centre of gravity in the negative direction). Effective when you want to reduce the assist force.
2	40	-10	123	-12.5	A suitable installation position for L-shaped lids (with the centre of gravity in the negative direction). Assist force on the closure side (narrow angle) is stronger than position 1.
3	50	-10	122	-12.5	A suitable installation position for lids where the centre of gravity is near the horizontal point of rotation. Assist force during closing is even weaker than position 5.
4	30	-20	113	-12.5	A suitable installation position for L-shaped lids (with the centre of gravity in the negative direction). Assist force on the closure side (narrow angle) is stronger than position 1.
5	40	-20	113	-12.5	A suitable installation position for lids where the centre of gravity is near the horizontal point of rotation. Lids are less likely to float during closing than at position 7.
6	50	-20	112	-12.5	A suitable installation position for lids where the centre of gravity is near the horizontal point of rotation. Assist force during closing is even weaker than position 5.
7	30	-30	103	-12.5	A suitable installation position for lids where the centre of gravity is near the horizontal point of rotation. Assist force on the closure side (narrow angle) is stronger than position 4.
8	40	-30	103	-12.5	A suitable installation position for lids where the centre of gravity is near the horizontal point of rotation. Lids are less likely to float during closing than at position 10.
9	46.5	-25	108	-12.5	Catalogue-listed installation position for S-AT02W (side panel mounted) and S-ATJD stays.
10	30	-40	93	-12.5	A suitable installation position for L-shaped lids (with the centre of gravity in the positive direction). Assist force on the closure side (narrow angle) is stronger than position 7.
11	35	-38	94	-10.2	Catalogue-listed installation position for S-AT005S (back panel mounted), S-AT01S (back panel mounted), S-AT02S (back panel mounted), and S-ATJS stays.
12	46.75	-25	108	-10.2	Catalogue-listed installation position for S-AT005 (side panel mounted), S-AT01 (side panel mounted), S-AT02 (side panel mounted), and S-ATJ stays.
13	30	-40	96.5	-32.5	An inset lid (panel thickness 20mm) can be installed at this position.
14	35	-38	94	-12.5	Catalogue-listed installation position for the S-AT02W (back panel mounted) stay.
15	30	-40	95.5	-37.5	An inset lid (panel thickness 25mm) can be installed at this position.
16	40	-45	101.5	-32.5	An inset lid (panel thickness 20mm) can be installed at this position. Opens at angles up to 70°.
17	30	-45	91.5	-42.5	An inset lid (panel thickness 30mm) can be installed at this position.
18	35	-50	96.5	-37.5	An inset lid (panel thickness 25mm) can be installed at this position. Opens at angles up to 70°.

Please note: Please contact us if you require installation positions other than those listed above.

For example

Ideal door motion is achieved by reducing retention torque at narrow angles and increasing retention torque at wide angles.

HG-PA Balance Adjustment (Torque Adjustment)

By turning the balance adjustment screw with a hex key (size 5), you can adjust the hinge torque to correspond with the lid’s centre of gravity.
Lid moment Mu > hinge torque: the lid applies force in the closing direction.
Lid moment Mu < hinge torque: the lid applies force in the opening direction.

S-AT Stay Balance Adjustment

Turning the balance adjustment screw causes the indicator to move.

The closer it gets to adjustment position A, the easier it becomes to lift box-shaped lids, where the centre of gravity is higher than the axis of rotation. Conversely, the closer it is to position C, the easier it becomes to lift L-shaped lids, where the centre of gravity is lower than the axis of rotation.

S-TAR Torque Adjustment

Turning the torque adjustment screw allows you to fine-tune the torque.

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