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CNC Bending Machines – Servo-Electric Vs Hydraulic

By Luis Torres

Advances in technology have transitioned sheet metal bending machines. Mechanical sheet metal bending machines were reasonably quick in their day. They made repeat bending operations possible. The concept of a sheet metal bending machine (press brake) is developed around a servo-electric based drive which evenly distributes force thus eliminating the need for a crowning table.

Hydraulic benders performed much more accurately and consistently than the machines that were used before the technology was applied. The first servo electric sheet metal machine for bending was made by Safan. The much tougher tolerances are more easily met with repeatable and economical processes for tonnage work of the low and medium sizes. The high flexibility capabilities of the sheet metal bending machine are crucial to most shops today.

Businesses cannot sustain wasted time that is caused by bad runs or untimely operating setup procedures. No hydraulic fluid needs to be disposed of in the servo electric bending machines. This allows savings in power usage, making these machines more environmentally friendly.

A unique combination of mechanics and electronics has produced an innovative drive for the Safan Brake machine called a mechatronic drive. Using a pulley principle for the drive, an even distribution of force along the length of the machine, has eliminated the need for crowning and improved precision.

Precision is crucial in most shops today. Much tougher tolerances are adhered to than in past years. Processes must be repeatable and accurate. It is unacceptable for business to sustain wasted time due to bad runs or timely set up procedures. The high flexibility of the servo-electric sheet metal bending machine is suited perfectly. That there is no hydraulic fluid to be disposed of and savings in power usage make these environmentally friendly. The industry need not be concerned with very expensive disposal processes that involve hazardous waste.

These bending machines are suitable for small runs as well as larger ones and the accuracy of a servo-electric system will ensure repeatable accurate runs, whether they are small or large. The short cycle time on a servo electric bending machine will increase the productivity of the shop.

Optional programs make this type of machinery even more desirable. The many features that are offered are high speed options and fixed lower beam heights. Scalable tonnages make this machinery a much better option than standard hydraulic heavy duty machines of the past.

Manufacturers are very pleased with this new technology that provides more precision accuracy and the abilities to reduce labor cost or intensity. For bending and cutting sheet metal the pre-programmable machines that use cutting edge technologies to ensure a better cut are starting to employ laser technologies into the robotics of their pre-programmable sheet metal bending machines.

Optional factors such as the extended working lengths, scalable working press tonnages, high speed options, fixed lower beam height of 930 mm and a programmable safety light guard can provide a far better option for sheetmetal bending than the standard heavy duty hydraulic heretofore considered the industry standard.

Luis Torres is Owner of CML Machine Tools, a CNC Bending Machine Supplier situated in Johannesburg, South Africa. To find out more information on specialized bending machinery, visit CNC Bending Machines

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Article Citation
MLA Style Citation:
Torres, Luis "CNC Bending Machines – Servo-Electric Vs Hydraulic." CNC Bending Machines – Servo-Electric Vs Hydraulic. 3 Jul. 2010. 27 Sep 2014 <>.

APA Style Citation:
Torres, L (2010, July 3). CNC Bending Machines – Servo-Electric Vs Hydraulic. Retrieved September 27, 2014, from

Chicago Style Citation:
Torres, Luis "CNC Bending Machines – Servo-Electric Vs Hydraulic"

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