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Springfield OH, 45502

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Oil hydraulic drives for forging presses

Our customers are provided with either variable flow or constant flow hydraulic drives, depending on their unique requirements.

Based on designs by Hans-Joachim Pahnke, PAHNKE Engineering developed the PAHNKE Modified Sinusoidal Direct drive (PMSD) especially for oil-hydraulic press drives.

This drive does not need any valves for the control of the press movement, but uses Wepuko's quickly-controllable RX series high-pressure pumps to determine the press force, forming speed, and direction of movement of the press.

Oil Hydraulic Drive Examples - Variable Flow (PMSD)

12 RX pump drive (PMSD) for Villares Metals (Brazil)
2 RX pump drive (PMSD) for Standard Steel (USA)
9 RX pump drive (PMSD) for Press Forge (USA)
10 RX pump drive (PMSD) for Union Electric (USA)
7 RX pump drive (PMSD) for Weber Metals (USA)

Oil Hydraulic Drive Examples - Constant flow

6 RF pump drive for the 1,675 ton open die press at Mattco (USA)
8 RF pump drive for the 10,000 ton closed die press at Standard Steel (USA)

Wepuko PAHNKE’s PMSD drive

PMSD stands for PAHNKE Modified Sinusoidal Direct drive. This is a design developed by PAHNKE Engineering in accordance with plans from Hans-Joachim Pahnke.

This drive does not require any valves for the control of the press movement. The RX-series high-pressure pumps are able to determine the force, speed and direction in a fast, smooth (shock free) and efficient manner. These pumps are extremely reliable and will perform flawlessly for at least 30,000 hours. Some of our customers have logged more than 50,000 hours of operation without needing any repairs!

Energy savings of approximately 25% vs. any other drive system of comparable drive system is achieved as a result of this brilliant design. All of our new presses are equipped with hydraulic drives that are designed and manufactured in accordance with the PMSD principle.

16-pump PMSD drive of an 8,000/10,000 ton press.

What's special about the PMSD?

  • Shock free & quiet performance
  • Extremely high reliability (at least 30,000, but in some cases well over 50,000 operating hours without repair)
  • Energy savings of more than 60% in comparison to water-hydraulic drives and between 20 and 30 % in comparison to other oil hydraulic drives

The most powerful hydraulic plant in the world

Based on the PMSD drive, we have designed the 42-pump drive (RX 500), the most powerful hydraulic plant in the world. With 40,000 hp installed power, it operates a 40,500 ton steel extrusion press and a 16,750 ton preforming press for Norheinco, China.