Sheet metal bending

We use modern CNC folding machines for metal folding. Advanced folding machines allow folding of even complex parts and ensure the accuracy and quality of the hinges. AMADA HFE 3I press brake models are currently operating in the company.

Guidelines for bending

ANTARA LT provides sheet metal bending guidelines focused on process optimization and dimensional accuracy. Key parameters such as bend angles and applied force are defined to support a stable, efficient, and repeatable bending operation.

Max dimensions and forces
Maximum aluminium thickness	10mm
Maximum Mild steel thickness	10mm
Maximum stainless steel thickness	10mm
Maximum product length	3000mm
Maximum bends in part	20
Maximum force for bending	100 tons
Maximum part weight	120 kg

Tolerances:

Angle tolerance is ± 0,5˚
Bending tolerance for each bending is ± 0,5

U-profiles for bending

We use special shape bending tool for the minimum required height-to-width ratio is determined by the type of tool. You can use the drawings below to check the height-to-width ratio.

Distance to the Bend Line

Slots, holes, and angled edges positioned too close to the bend line may deform during bending, often making them unusable. To prevent deformation, the distance from the edge of a hole to the bend line must be greater than the width of the bending tool (V-die opening). Please refer to our bending tables for the available tooling per material and sheet thickness.

The minimum distance (A) can be calculated using the formulas below:

Minimum distance for holes:
A = (V-die opening ÷ 2) − 1
Minimum distance for slots and angled edges:
A = (V-die opening ÷ 2) + 1

If contours are detected within the bend line in your design, the system will display a warning in the viewer.

Warning: Distance to bend line

Bend Relief: Cut at the Bend Line

When features such as holes, slots, or angled edges are located within the bending tool area, a cut along the bend line is required. This cut, commonly referred to as bend relief, allows the material to bend smoothly without tearing or unwanted deformation.

For holes and slots, a fixed proportion applies: the length of the relief cut must be equal to the width of the feature, and the width of the relief must be at least 0.8 times the material thickness.

Important: The bend line must always be straight and perpendicular to the sheet. An angled finish at the end of the bend line may result in an inaccurate bend radius and cause the final part to fall outside the specified tolerances.

Minimum Clearances

When submitting your design, it is important to allow sufficient clearance. A minimum distance of 0.5 mm must be maintained between the edge to be bent and the flat area of the material. This ensures clean, accurate processing and a high-quality final product.

Internal Bend Radius

The internal bend radius is determined by the shape of the tooling and the properties of the material being bent. For correct product recognition, the bend radius must fall within a defined range. Please refer to our bending tables to see the available radius for each material and thickness.

If the specified internal radius falls outside these guidelines, a warning will be displayed. ANTARA LT will then automatically adjust the drawn radius to ensure the final product maintains the intended shape.

Bending Tables
Our bending tables are a key element of the press brake process. They include all essential data required for sheet metal bending, such as bend angles, bend radius, and tooling specifications. By using these tables, we improve production efficiency while ensuring precise, high-quality parts that fully meet your requirements.

Bending table for mild steel:

UAB ANTARA LT recommended bending tables:
Updated: 2026-01-28

D(thickness) [mm]	[mm]	V=6	V=8	V=10	V=12	V=16
1	correction	0	0
	Inner Radius	1	1,3
	K-factor	0,442	0,445
	Max.length	3000	3000
	min. bending angle	30	30
	min. dimension (Z) 90°	5	5,5
	min. dimension (Z) 0-30°	5	5,5
1,5	correction		0,6	0,4	0
	Inner Radius		1,2	1,3	2
	K-factor		0,473	0,407	0,458
	Max.length		3000	3000	3000
	min. bending angle		30	86	30
	min. dimension (Z) 90°		6	7	8
	min. dimension (Z) 0-30°	5	6	7,5
2	correction			0,6	0,6	0
	Inner Radius			1,3	1,8	2,4
	K-factor			0,45	0,458	0,43
	Max.length			3000	3000	3000
	min. bending angle			86	30	30
	min. dimension (Z) 90°			7	8	11
	min. dimension (Z) 0-30°		6	8	9,5
2,5	correction				0,7	0,5
	Inner Radius				1,8	2,6
	K-factor				0,42	0,42
	Max.length				3000	3000
	min. bending angle				30	30
	min. dimension (Z) 90°				8	11
	min. dimension (Z) 0-30°			8	9,5

D(thickness) [mm]	[mm]	V=12	V=16	V=20	V=25	V=32	V=40	V=50
3	correction		0,9	0,6	0,3
	Inner Radius		2,6	3	4
	K-factor		0,41	0,356	0,392
	Max.length		3000	3000	3000
	min. bending angle		30	86	86
	min. dimension (Z) 90°		11	13	16
	min. dimension (Z) 0-30°	10	12	14,42
4	correction			1,3	1,2	0,8
	Inner Radius			2,6	4	5
	K-factor			0,442	0,442	0,43
	Max.length			3000	3000	3000
	min. bending angle			86	86	86
	min. dimension (Z) 90°			13	16	20
	min. dimension (Z) 0-30°		12	14	18,0333
5	correction
	Inner Radius					5	6,5
	K-factor					0,434	0,444
	Max.length					2200	2500
	min. bending angle					45	45
	min. dimension (Z) 90°					20	24
	min. dimension (Z) 0-30°				18	23,05
6	correction					2	1,5	0,8
	Inner Radius					5	6,5	8
	K-factor					0,441	0,441	0,427
	Max.length					1200	1500	2000
	min. bending angle					86	86	86
	min. dimension (Z) 90°					22	28	35
	min. dimension (Z) 0-30°

D(thickness) [mm]	[mm]	V=50	V=63
8	correction
	Inner Radius	8	10
	K-factor	0,443	0,365
	Max.length	1000	1300
	min. bending angle	86	86
	min. dimension (Z) 90°	35	45
	min. dimension (Z) 0-30°
10	correction
	Inner Radius	8	10
	K-factor	0,445	0,36
	Max.length	700	900
	min. bending angle	86	86
	min. dimension (Z) 90°	35	45
	min. dimension (Z) 0-30°

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