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Press Brake Machine For Sale

Affordable Price

With the same quality, our prices must be the best compared to other suppliers.

Good quality

When we say good quality we mean really good quality, not just talk. Good quality is what really impresses customers.

Timely after-sales service

In time 24x7 hours service and oversea service avaliable

Some Words for You

I believe you're on the process to find the best press brake machine on the market. However, shopping online for the perfect press brake for your business can be tough. You need a new press brake, but you still haven't found the reliable supplier, or I can say, the manufacturer.

Quality, costs, uses, services, and many other factors will decide which press brake you buy. That's why every step of the way to buying a press brake machine requires great care. And you should do your research very carefully before saying yes to the press.

After do the research and start talk to the press brake suppliers, and get quotes as well as technical data, you will see a clear decision unfold, and you have to do your due diligence to know which one should you cooperate.

Our mission is not only to provide you the best press brake machine on the market with unbeatable prices, but also ensure our machine works well during its service life. Then a professional team will be needed and you can TRUST US to be your best choice.

When you're ready to discuss the details about our press brake, contact us and start our negotiation. We'll provide you our professional solution that you need.

What Our Customer Say

We at R S Machine tool Services are a team of well qualified engineers having experience for past 30-40 years working towards providing best manufacturing solutions for sheet-metal forming with And offered our services to 400 plus customers across Karnataka and Hosur Road We supply high quality reliable products with excellent customer support and after sales services. In collaboration with ADH machine tools we have 50 plus customers who are using our reliable and robust products with positive feedback and testimonials. We supply machinery such as Press brake, Shearing and Fiber Laser Cutting Machine of ADH machine tools.
Raju R
CEO

88 ° and 90° Bend Allowance Chart

What is bend allowance?

Bending allowance is statistical data which summed up by experienced mold designers based on years of experience.

The later mold designers can directly put the data into the formula to calculate the unfold size of various sheet metals.

Therefore, press bend allowance is summarized for calculating unfold dimensions for mold designers.

The functions of bend allowance:

The one who has designed the punch mold all know that the first step is to expand the bend structure into the flat structure in reverse way step by step when getting the product drawings from the customers and began to design mold drawing.

Then punching the flat structure and design the bending mold based on the above process so as to meet customer’s requirements.

The structure design of the mold not only need to consider the customer drawings requirements but also need to meet customer requirements of drawing dimension tolerance requirements, namely, the precision also needs to meet customer’s demand.

The most difficult thing here is to guarantee the accuracy of the relevant unfolds dimensions of stamping bending.

How to calculate bend allowance?

After learning what is bend allowance, the next thing is how to calculate the bend allowance.

You can directly use our bend allowance calculator to calculate the bending allowance. Besides, the fabrication calculator can also help you calculate K-factor, Y-factor, bend allowance, bend deduction, etc.

In one of our blog post we make a very detailed analysis on this, so go ahead and check out the method to calculate the bend allowance.

Bend allowance chart

Material Thickness Deduction Inside
R
Angle Die Punch
R V
Width
R Angle
Steel Plate 0.8 1.5 1.3 90° 0.5 8 0.2 88°
0.9 1.7 1.3 90° 0.5 6 0.2 88°
1 1.8 1.3 90° 0.5 8 0.2 88°
1.2 1.91 1 90° 0.4 6 0.2 88°
1.2 2.1 1.3 90° 0.5 8 0.2 88°
1.5 2.5 1.3 90° 0.5 8 0.2 88°
Cold Rolled
Plate
1.6 2.65 1.3 90° 0.5 8 0.6 88°
1.8 3.4 2 90° 0.8 12 0.6 88°
2 3.5 2 90° 0.8 12 0.6 88°
2.3 3.75 2 90° 0.8 12 0.6 88°
2.5 4.2 2.6 90° 0.8 16 0.6 88°
3 5.05 2.6 90° 0.8 16 0.6 88°
4 6.9 4 90° 0.8 25 0.6 88°
Hot Rolled
Plate
2.3 3.77 2.6 90° 0.8 16 0.6 88°
3.2 5.2 2.6 90° 0.8 16 0.6 88°
4.2 7.4 4 90° 0.8 25 0.6 88°
4.8 8.1 4 90° 0.8 25 0.6 88°
Aluminum Plate 0.8 1.5 1.3 90° 0.5 6 0.2 88°
1 1.6 1.3 90° 0.5 8 0.2 88°
1.2 2.1 1.3 90° 0.5 8 0.2 88°
1.5 2.45 1.3 90° 0.5 8 0.2 88°
1.6 2.7 1.3 90° 0.5 8 0.6 88°
1.6 2.4 1.3 90° 0.6 10 0.6 88°
2 3.25 2 90° 0.8 12 0.6 88°
2.3 3.6 2.6 90° 0.8 16 0.6 88°
2.5 4.2 2.6 90° 0.5 16 0.6 88°
3 4.7 2.6 90° 0.8 16 0.6 88°
3.2 5 2.6 90° 0.8 16 0.6 88°
3.5 5.9 4 90° 0.8 25 1.5 88°
4 6.8 4 90° 0.8 25 1.5 88°
5 8.1 4 90° 0.8 25 3.2 88°
Copper Plate 0.8 1.6 1.3 90° 0.5 6 0.2 88°
1 1.9 1.3 90° 0.5 8 0.2 88°
1.2 2.15 1.3 90° 0.5 8 0.2 88°
1.5 2.55 1.3 90° 0.5 8 0.2 88°
2 3.5 2 90° 0.8 12 0.6 88°
2.5 4.2 2.6 90° 0.8 16 0.6 88°
3 5 2.6 90° 0.8 16 0.6 88°
3.2 5.1 2.6 90° 0.8 16 0.6 88°
3.5 6 4 90° 0.8 25 1.5 88°
4 7 4 90° 0.8 25 1.5 88°

Calculate unfold size with bend allowance chart

Bend Allowance Chart

Bend forming 0°L=A+B-0.43T, T=Thickness, Deduction=0.43T

Formula: L(unfold length)=A(Outside size)+B(Outside size)-K(K-factor)

None-90° bend unfold according to the neutral layer, the distance from neutral to sheet inner side is T/3, inner R can refer to the above chart.

V-die width is 6-8 times the plate thickness

None-90°bend = 180°- Angle/90°*Deduction

The deduction is 1.8 times the steel plate thickness and 1.6 times the aluminum plate.

For plate under 2mm, K-factor is 0.432, R=plate thickness, unfold size can accurate to 0.05.

Generally, when design the sheet metal parts, the min inner R=thickness/2, if less than that, the grooving (V-cutting) will be required to solve the problem.

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