Notching machine


// Quality Products

Notching machine

Slot punching is used for the produc­tion of rotor and stator lami­na­tions using the single-slot process. This process is mainly used for the produc­tion of elec­tric motors and generators.
The high precision of our groo­ving punches achieves a pitch accu­racy that signi­fi­cantly influences the quality of your products.


Our custo­mised solu­tions are suitable for any produc­tion task, whether it is a stand-alone system or a fully auto­mated produc­tion line. Our slot­ting machines can be flexibly custo­mised to your requi­re­ments and enable effi­cient and cost-effec­tive proces­sing of your elec­trical sheets.


Place your trust in German manu­fac­tu­ring and our decades of expe­ri­ence as a reliable partner in stam­ping and forming technology.


Contact us today and find out how our groo­ving presses can take your produc­tion to a new level.










// Options

Notching machine

Sound­proof cabin

The sound­proof booth can be confi­gured either for a single groo­ving machine or as part of a fully auto­mated produc­tion line. This signi­fi­cantly reduces noise pollution.


Height-adjus­table tool table

A manu­ally height-adjus­table tool table is used to correct the infeed height when regrin­ding a tool.


Punching waste control

Moni­to­ring of the scrap chute, falling punched parts are detected in order to reco­g­nise a backlog of punching waste in good time.


Auto­matic tool clamping

Auto­matic tool clam­ping simpli­fies the set-up process and enables precise mecha­nical instal­la­tion of the tool in the groo­ving press.


Board clam­ping by means of mandrel in holder

Blanks that are picked up by a mandrel can be clamped with an expan­ding mandrel deve­loped by us and can ther­e­fore be run without a hold-down device.


Double sheet control

Inserted sheets are checked for sheet thic­k­ness before punching to prevent the acci­dental inser­tion of two components.


Tool lubri­ca­tion

Auto­mated spraying device that enables precise and econo­mical appli­ca­tion of an oil film before punching.


Controlled tool

Tool with two or more inte­grated punches that can be indi­vi­du­ally controlled to perform several groo­ving passes in one clam­ping opera­tion. In most cases, the pitch circle is also adjusted dyna­mi­cally between the passes.


Marking punch

Embos­sing devices can mark the sheets accor­ding to customer requirements.


Partial package production

A motor can be cons­tructed in various sub-packages of lami­na­tions. Each package can be different.

The sheet packs are auto­ma­ti­cally produced in the correct sequence.



With inter­mit­tent punching, grooves can be punched in blocks.

With asym­me­trical inter­mit­tent machi­ning, the groove pattern can be programmed comple­tely freely.



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Two-posi­tion punching

Grooves are punched with a two-stage punch that is offset in height. Depen­ding on the immersion depth, one or both punches are used for punching. This makes it possible to punch addi­tional and diffe­rent features such as air holes or markings in a single pass.


Spiral groo­ving

The groove pattern is offset for each sheet depen­ding on the angle. This creates a conti­nuous groove in the form of a spiral in the finished sheet stack.


Groove widening

With groove widening, a groove is punched twice with an offset in order to widen it. This may be neces­sary to create a run-out radius at the end of the stack of sheets.

Martin Hagel 
Head of Automation 
+49 751 56082 – 0 
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// Univer­sally applicable

Notching machine

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In this appli­ca­tion example, the groo­ving machine is speci­ally desi­gned as a manual inser­tion machine. Parti­cular emphasis was placed on ergo­nomic design and easy hand­ling for the operator.


The tool frame of the groo­ving press can be auto­ma­ti­cally clamped and aligned using pneu­matic clamps, thus ensu­ring a secure and posi­tive connection.


The special O‑frame design enables a very high rigi­dity of the machine frame.


Sound insu­la­tion has also been inte­grated to reduce acou­stic noise in the working envi­ron­ment. The groo­ving machine ther­e­fore fulfils the requi­re­ments for a powerful and user-friendly solu­tion for manual inser­tion operations.


The optional pneu­ma­ti­cally clamped drive pins, depen­ding on the holder, ensure precise posi­tio­ning of the work­pieces during punching and also enable a punching process in which no hold-down device is required.


Tools are changed from the rear of the machine with the best possible acces­si­bi­lity and ergonomics.


The simple and intui­tive HMI enables easy set-up and safe opera­tion of the machine.

Play Video

// Picture gallery

Notching maschine in use

Here you will find pictures and videos from instal­la­tion to use by the end customer.

Let us inspire you and convince you of our exper­tise and experience.

// Hagel Automation

Latest news

Transfer system in press

Transfer system for a 5 metre press table

DEZ 2023 | We have built a transfer for a customer in the Czech Repu­blic. The transfer system was inte­grated into a press which has a 5m press table. The control of the transfer was planned, installed and commis­sioned by us 

Rendering Tandem slot cutter

Slotting centre 1400mm

DEZ 2023 | For a customer in Germany, we are curr­ently manu­fac­tu­ring a slot­ting centre that includes two single slot­ting machines connected in series. The system is equipped with two 200KN groo­ving centres. The entire project includes two comple­tely inde­pen­dent slot punching auto­ma­tions Centre 1 can punch a sheet diameter of 1400mm Centre 2 can punch a sheet diameter of 1000mm 

Feeder in press line

Feeder between C‑frame presses

JAN 2022 | Teles­copic feeder successfully installed between C‑frame presses in the auto­mo­tive sector in Germany. 

Tandem grooving machine installed at a customer's premises

Tandem grooving machine installed

DEC 2021 | We have installed a tandem groo­ving press for a customer in the Czech Repu­blic, which can be used in single or tandem opera­tion. Two 160KN groo­ving punches are installed in the system.

Press system with automation

Press system with automation

NOV 2021 | We have installed a 300 tonne press for a customer in the auto­mo­tive sector in Germany. The auto­ma­tion sequence of the system includes: Blank loader, gripper feed & transfer. 

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Hagel Automation in figures



Employees at the Grün­kraut site


Transfer systems installed


Years of experience
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// FAQ

Questions and answers

How long does a tool change on a grooving press take?

Normally, a tool change on a groo­ving press takes less than 10 minutes.

What does a groove punch do?

A groo­ving press produces rotor and stator lami­na­tions for elec­tric motors and gene­ra­tors using the single groo­ving process.
The stamped metal sheets are assem­bled into packages and then wound or moulded and assem­bled into a motor or generator.

Which parts are mainly produced on grooving presses?

Slot punches are used to manu­fac­ture elec­trical lami­na­tions (stators and rotors) for elec­tric motors.

How does a groove punching machine work?

A single groove is punched into a circular sheet using a punching tool.
The sheet is then fed through a feed device (divi­ding head) by one divi­sion – the punching process is repeated.
Depen­ding on the pitch, between 30 and 100 punching opera­tions are carried out per sheet until the finished sheet is produced. This takes place at a stroke rate of 600 to 1200 punching opera­tions per minute.

What are the advantages of a groove punch?

The produc­tion of sheet metal using the single groo­ving process is consider­ably cheaper and more flexible compared to a mould with a complete cut.

How fast is a groove punch like this?

As a rule, the groo­ving press is operated at 600 to 1200 strokes per minute. This depends on the size and comple­xity of the component.

How many tonnes can a grooving machine punch?

We curr­ently offer groo­ving punches in a range of 5 – 20 tonnes punching force.

Why a Hagel Automation grooving machine? 

Slot punching at the highest level and maximum precision and output. The patented design of the groo­ving press enables high rigi­dity and optimum condi­tions for good auto­ma­tion.
Thanks to the drive tech­no­logy used, there are no more wearing parts on the groo­ving press.

Modernise or replace old grooving presses?

We offer custo­mised solu­tions for the mecha­nical and elec­trical moder­ni­sa­tion of old groo­ving presses. In addi­tion, exis­ting groo­ving presses can be retro­fitted with our auto­ma­tion concepts.

How large is the output of a grooving machine?

Depen­ding on the size and degree of auto­ma­tion, the output of our systems is between four and ten sheets per minute.

What is the delivery time for a groove punch?

It usually takes around 10 months from orde­ring to deli­very of a groo­ving machine. We often have a demons­tra­tion machine in-house that is available at short notice.

How easy is it to maintain a grooving machine?

The groo­ving machine has a modular design and is very easy to main­tain, as the groo­ving machine no longer has any wearing parts.

Who supplies grooving presses and builds the automation for them?

Hagel Auto­ma­tion specia­lises in the design and cons­truc­tion of slot­ting machines and the entire auto­ma­tion process. Hagel Auto­ma­tion supplies effi­cient, modern and highly precise slot­ting machines.

What does a groove punch cost?

The costs depend on the required punching force, the equip­ment and the degree of auto­ma­tion of the groo­ving press. We are able to prepare a quota­tion for any appli­ca­tion at short notice.

How heavy is a groove punch?

Approx. 4000 to 7000 kg.

What are the areas of application of a grooving machine?

Produc­tion of elec­trical sheets for motors and gene­ra­tors for wind power, hydro­power and drive technology.

How does the single grooving process work with grooving punches?

A single groove is punched into a circular sheet using a punching tool.
The sheet is then fed through a feed device (divi­ding head) by one divi­sion – the punching process is repeated.
Depen­ding on the pitch, between 30 and 100 punching opera­tions are carried out per sheet until the finished sheet is produced. This takes place at a stroke rate of 600 to 1200 punching opera­tions per minute.

What sheet diameters are possible on a grooving press?

Curr­ently, sheet metal with a diameter of 35 mm to 1300 mm is processed on groo­ving machines. The current trend is towards larger diame­ters of up to 1800 mm.

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