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BUYING A BENDING MACHINE


18 / Dec / 2014

BUYING A BENDING MACHINE

For more than 50 years Prada Nargesa have been manufacturing profile formers. With over 3000 units sold worldwide, we are considered to be one of the best manufacturers of bending machines, not only for our quality, but also our prices.   
Thanks to our customers who have put their trust in us over the years, we strive to exceed day by day, innovating and offering new products and also to give technical orientation and advice to those who wish to purchase a bending machine, being professionals in the metalmechanic sector, or simply to those who have any doubts with respect to this type of machine.
Therefore we propose some points which should be considered before deciding which bending machine is best suited to your needs.

What should be taken into account before buying a bending machine

The first and most important is to know the type of work to be carried out, as well as the type of profiles and sections which are to be bent.

This means the maximum diameter of the round pipe, profile or shape must be considered. This will determine the bending power of the machine required.

The capacity of the machine is often regulated by the dimension of the axis. That is to say a bending machine which has an axis of 80mm can bend a pipe with a diameter of 80mm maximum, under normal conditions, with the exception of the smaller machines with an axis of 40mm which can bend pipes up to two and a half inches (63.5mm).

Some manufacturers use different diameters in the upper and lower axes. It is important to know the diameter of all axes not only the upper one.

The prices of tube benders may vary depending on the diameter

The price of a machine bending pipes of one, two and two and a half inches is similar, however, if the sections to be bent are over two inches then the cost of the machine is considerably more.

Once the dimension of the axes have been calculated we can go on to the next point.

What type of traction do you need? Traction to 2 rollers or traction to 3 rolers?

A 2 traction roller machine or a 3 traction roller machine. If the work to be carried out is sporadic and the finish is not significant, it is possible to use a machine where only two of the axes are motorized. The bending machine which has two motorized axes must have knurled rollers, these being with ridges to help drag the material. In this case only the two lower axes are motorized whereas the upper one is not. When bending profiles and square pipes with this type of machine the part of the material in contact with the two inferior ribbed rollers will leave a mark made by these rollers.

When bending a round pipe, some motricty problems may arise and the round pipes may slip on the roller preventing the work to continue at a normal speed as it would do with bending machines of 3 traction rollers.

Piramidal bending machine or Asymmetric bending machine

  • The Piramidal bending machine is easy to recognise, only the upper and central roller moves up and down, functioning manually with a spindler or with a hydraulic piston.
  • The Asymmetric bending machine however, allows the lateral rollers to move up and down to determine the diameter of the curve.   

Which is the better bending machine. Piramidal bending machine or asymmetric bending machine

The piramidal bending machine can be of 2 lower traction rollers or 3 traction rollers. With this type of machine it is easier to bend pipes of a greater diameter as the distance between the centres of the lower axes is superior and always equal. Therefore, if you are bending profiles of greater dimensions with large curves, this machine is a good option. However, if the work to be carried out is varied and on occasion the need is for small curves to be made then the asymmetric bending machine is the better choice.

The distance between the centres of the lower axes can vary until the lower rollers touch the upper rollers reducing the diameter of the curve to the minimum.

This system of bending allows for much more usage of the material when having the axes closer. In our opinion the asymmetric bending machine is more versatile, efficient and faster than the piramidal bending machine.

Advice when purchasing a bending machine from a mechanical point of view

Being familiar with the material from which the axes are manufactured helps us to judge their elasticity. A bending machine should never be purchased where the axes are not tempered and rectified and if possible made of D2 steel or its equivalent. This will allow for the overworking of the machine without the possibility of breaking the axes. The motorization of the bending machine is very important.

There are several different traction systems:

  • By means of pinions and chain, with time the chain can slacken and in many cases is not sufficiently productive. By means of tempered gears by induction, and in our opinion the best choice, as there is no loss of productivity during the logevity of the machine.
  • Other bending machines use a cardan system, fitted with a plastic security device for the for the overworking of the machine. This device breaks when the machine is used to curve over its possibilities or speed.
  • Another system, in machines of a superior bending capacity, is by means of a hydraulic motor and tempered gears by induction, a system very similar to the gearmotor, with tempered gears, and which is equally productive.

Taking these mechanical aspects into account is very important, because although there are machines which are initially more economic, in the long run they end up being more expensive and unsustainable.

Choosing a vertical or horizontal bending machine

This choice is very simple. The height of the workshop will determine this.

When bending curves with a diameter of 4 metres and the workshop does not allow for this height then a horizontal bending machine must be the obvious choice.

The machines bending two and a half inches, or axes of 40mm are usually vertical bending machines. This is a more comfortable method of bending all shapes.

Machines of 60mm axes or over are normally set up to be used in both positions, always depending on the piece to be bent. That is, when curving superior dimensions the horizontal position is preferable adding conveyor belts to both ends to facilitate the work.

The chassis of the bending machine

Today there are practically no manufacturers who use cast iron chassis.   Under no concept, and above all if a professional job is to be obtained and guaranteed, a bending machine of cast iron should never be purchased. If overworked this type of machine could crack without detection or warning. The chassis of the machine should always be made of welded iron, and after its stabilisation, duly mechanised.

Which bearings should a bending machine use to make it more resistant

Avoid bending machines with conventional ball bearings. The modern bending machines use tapered roller bearings which are more resistant and reliable.

What guarantee should a bending machine have

The manufacturer’s guarantee is another factor to take into account when choosing a brand.   By law, and depending on the country of purchase, it is usually one year. Prada Nargesa gives a 3 year guarantee on all our models. The MC150B bending machine, the MC200 bending machine, the MC200H hydraulic bending machine, the MC400 bending machine and the MC650 bending machine.

Can an iron bending machine be used with aluminium?

In most cases the iron bending machines are used to bend iron and there are specific aluminium machines to bend aluminium. To obtain a perfect curve on an iron profile it is important that the distance between the centres of the axes is minimum, whereas the aluminium bending Machine has its axes further apart and the distance between them is easily adjustable.

If the aluminium profile is small or simple, the manufacturer will be able to advise you on its curved viability, always indicating the minimum diameter required. In most cases the aluminium profiles are filled with fine sand or marble dust, it is then vibrated and finally the profile is ready to be bent. Only in this way can the aluminium profiles be bent. 

We hope that our observations have helped you better know the world of the bending machine and the most important aspects to take into account. Furthermore we hope that you will find them usefull when decidint to purchase your machine. For any queries please do not hesitate to contact us and we will reply as soon as possible.




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Comments

Bending

Samuel perez - Fri, 09/16/2016

I want to bay a nargesa bending machine with everything

buying a MC650 - Nargesa

Gangadhar Maru… - Tue, 09/27/2016

I am intending in buying a MC650 - Nargesa with all accessories . kindling forwad me the qoutation and time of delivery onces the order is confirmed

Buying MC650

Awadh Ahmed - Sat, 04/01/2017

I will lke to buy MC650 please let me know CIF to Dar-es-Salaam Tanzania please.
Cheers
Awadh

MC650-NARGESA

John - Fri, 04/07/2017

I WANT TO BUY THIS THINGS

mc 150b price

polpoj polchar… - Sun, 10/02/2016

I am intending in buying a MC 150b with all accessorries .please kinding to sent me the price by e-mail.

Quotation

Sushanta kundu - Mon, 11/07/2016

I am from India kindly quote me the price of mc150 with all types of rollers
Thank you.

please send me your price

marlon - Mon, 10/03/2016

please send me your price list for bending machines.

pricing

Bob Wilt - Tue, 10/18/2016

How can I get pricing quote on the mc150 bender

About prise of mc 150 b

Asela madusanka - Mon, 11/14/2016

Hi I would like to know prise of MC150 B with all of accosery ? For Dubai

MC150B price

Justin Herrera - Sat, 12/03/2016

Hi could you please send me a price on this machine MC150B and could you also include shipping to the U.S. in San Diego

Quotation

Anil kumar - Wed, 12/07/2016

Could you please send a quotation of this machine MC150 B and also include shipping to the India
Thanks

Hi I want to bay a nargesa

ashraf kapoor - Sun, 12/11/2016

Hi I want to bay a nargesa bending machine plz send me your price list and include shipping to the india

Mc 150d price in Indian

shaik ismail - Mon, 01/30/2017

Mc 150d price in Indian rupees

price

anees rahman - Sat, 03/11/2017

sir, iwant MC150B NARGESA price

Hi I want to bay a nargesa

Deepak - Tue, 02/21/2017

Hi I want to bay a nargesa bending machine plz send me your price list and include shipping to the india kerala.

Bending Machine

David Kabengule - Tue, 12/27/2016

I need your quotion for MC150B NARGESA bender. Also advise i need it for stationing at the workshop and do bending metal for various purposes. Handling Mild steel, Stainless steel aluminium e.t.c

Quotation

JOSEPH DEVLIN - Sun, 01/29/2017

Hi I am after a quotation on your rolling machining. Possibly mc150.I wish to bend polished stainless steel 1.2mm wall. Will this be possible? I intend to make polished bars for lorries etc so I would need to be fit to bend up to 2 1/2". Could you quote and advise the best option for me and do I need different size dies to bend different diameters pipe. Thanks

HI! please send me your price

aleksander - Sun, 02/05/2017

HI! please send me your price list for bending machines whith accsessories,and shipping to Latvia,Riga.thank's!

mc150 b

joko budi raharjo - Sat, 03/25/2017

I am very interested in your product, but how can I get it

MC 650 and MCH 400

Awadh Ahmed - Sat, 04/01/2017

Hi
Please let me know the price of that two Machine as subject above,
Cheers
Awadh

Mc150B

Ian Gillett - Sun, 05/14/2017

I would like a price please, on a Nargesa Mc150B.

Machine price?

Pratik chichkoti - Sun, 05/21/2017

I want to buy the machine ,what is its cost

Machine price?

Pratik chichkoti - Sun, 05/21/2017

I want to buy the machine ,what is its cost

ms pipe bending

savan - Sun, 05/21/2017

Nargesa pipe bending machine price in India gujrat pin:384315
mod. mc150b

purchase price

Steve Young - Thu, 06/15/2017

Hi to all could you provide an estimated cost of the MC150B bending machine capable of performing all of the actions shown on your tutorial. could you also provide freight cost in total.
Thanks for your time Steve

mc 150B nargesa

Kritivas badtiya - Sat, 07/01/2017

please send me your bending maching price.

Banding machine

Santosh sharma - Mon, 08/21/2017

Nargesa banding machine
I am menufacturer of Furniture and we need banding machine
Please send price small size banding machine price

Machine price enquiry

Prashanth jain - Tue, 10/17/2017

I am from India I want buy bending machine pls contact me 919900927921

Quote

Buyer - Fri, 11/17/2017

What's the price for mc 150 bender
I want to bent stainless steel tubes from 7/8 to 11/4 dia tubes.n metric equivalent
Thank you.k1tp5

QUOTE

Mariana - Fri, 01/12/2018

Hi, could you please tell me the price of the MC650 in the US?

Nargesa MC 150b

Daniel - Tue, 01/30/2018

Salut cat costa MC150B transport in Romania,EU locuiesc acum in Irlanda,va multumesc Daniele

MC 150B

Edgardo Aves - Sun, 02/18/2018

Please send me the price of MC150 B with all bending options to all metal profiles, like: flat bar, angular, round bar, and tabular profile, square tubing and rectangular..

MC 150B

Edgardo Aves - Sun, 02/18/2018

Price if ship to FILIPINAS

Mt500a

Jerome - Mon, 10/22/2018

Do you deliver to philippines/filipinas.how much this machine mt500a and cost of deliver in manila.thank u. Please reply

REPLY: Mt500a

Nargesa - Mon, 10/22/2018

Hello Jerome. We arrange shipment anywhere in the world. Our sales department will send you a quotation as soon as possible

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