Choosing between a hydraulic and a servo-electric CNC turret punch press is mainly a decision about the punching drive and how it suits your production. Both technologies can position sheet accurately and carry out a range of punching and forming operations. The differences become more useful when you examine the duty cycle, stroke control and maintenance requirements.
Within the Morgan Rushworth range, the TPH is the hydraulic option and the TPS uses a servo-electric punching system. Both include 20- and 30-tonne configurations. Choosing between them should involve more than picking the newest drive technology.
What changes in the punching mechanism
A hydraulic punch uses pressurised oil and a hydraulic cylinder to deliver the punching stroke. On the TPH, the punching system uses H+L Voith technology, with adjustable stroke parameters for different tools and operations.
The TPS controls its punching hammer through a servo-electric drive instead. Its punch position, speed and dwell settings can be programmed to suit the operation, without a hydraulic punching circuit.
It is important to distinguish the punching drive from the sheet-positioning axes. A hydraulic turret punch can still use electric servo motors to move the sheet and control the turret. Seeing FANUC servo motors on a specification does not, by itself, make the punching mechanism servo-electric.
Energy use depends on the production cycle
Servo-electric punching can reduce the energy associated with keeping a conventional hydraulic punching system ready between strokes and during idle periods. The benefit depends on how the machines being compared manage standby, how much time they spend punching and what auxiliary equipment is running.
Modern hydraulic designs also vary in their energy management. Comparing a new servo-electric machine with an older hydraulic press is not the same as comparing two current machines configured for the same work.
For a useful comparison, measure energy over a representative batch, including normal loading and waiting time. Record the number of acceptable parts produced and express the result in kWh per part. Keep the scope clear: include cooling and other machine auxiliaries consistently, and account for compressed air if you include it in either estimate.
A quoted electrical supply requirement in kW is not a measurement of average energy consumption. It should not be multiplied by the shift length and presented as the machine’s actual energy bill. Ask for measured or properly modelled consumption for your production pattern.
Programmable strokes and formed features
The TPS allows the punching movement to be adapted through programmed positions, speeds and dwell times. A short movement may suit a shallow marking operation, while a forming tool may need a more controlled stroke and additional clearance above the sheet.
The TPH also provides stroke adjustment for punching and forming applications. Hydraulic should not be taken to mean fixed-stroke or unsuitable for forming.
Compare the actual tool and programme you intend to use. The important questions are whether the machine can achieve the required form, repeat it consistently and move the sheet clear of it afterwards. Tool geometry, material behaviour and available clearance remain important whichever drive is selected.
Accuracy and output need separate checks
Servo-electric does not automatically mean that every part will be more accurate. Finished accuracy depends on the frame, axis positioning, tool condition, clamping, material and process. The published TPH and TPS tables give the same nominal positioning and repetition accuracy figures, so they do not support a blanket accuracy advantage for either range.
Equally, do not compare one machine’s marking rate with another machine’s punching rate at a longer pitch. A short-stroke marking figure does not describe the time needed to produce a formed enclosure panel.
Ask for cycle estimates using the same drawing, material, tools and quality criteria. Include indexing, repositioning and handling, then check the estimate against a trial where practical.
Noise and maintenance
Removing a hydraulic punching circuit removes its pump-related noise and oil-management tasks. The punching impact itself remains, however, and the noise generated by a particular job still needs consideration. A servo-electric machine should not be treated as silent.
Likewise, a hydraulics-free punching drive does not make the entire machine lubrication-free or maintenance-free. The TPS still uses tooling lubrication, and its servo hammer system has water cooling. Tools, clamps, guides, cooling equipment and protective systems all need the care specified for the machine.
For a hydraulic machine, the maintenance plan must also address its hydraulic system and the relevant oil, filtration and temperature requirements. Compare the documented schedules and support arrangements rather than relying on broad claims about reliability.
Which option should be on your shortlist
The TPH deserves consideration where its hydraulic configuration, tooling and complete quoted package fit the work and investment budget. The TPS deserves consideration where servo stroke control and reduced idle energy demand are particularly relevant to the production pattern.
Neither choice removes the need to check sheet size, turret layout, handling, software and service. A suitable hydraulic machine can be a better production fit than an underspecified servo-electric one, and vice versa.
Before deciding, ask each supplier to identify the tooling required for your sample parts, what is included in the quotation and how routine maintenance will be supported. Confirm optional forming and automation equipment in writing.
Compare the Morgan Rushworth TPH and TPS alongside the wider Selmach CNC punch range. The most useful next step is a discussion based on the parts, quantities and production interruptions you actually experience.
Published 1st October 2026