MKF metal milling machine for efficient notching and simultaneous separation

Notch + separate (or segment) 36 impact samples (12 bars) in under 60 seconds

Your sample volume for impact test specimens ISO 148 / ASTM E23 is >30 sets (90 specimens) per day?

Then you should switch to rationalised production!

The production of notches on bars for impact bending tests is relatively simple: The required bars (3 impact bending specimens per bar) are machined from the primary material. Depending on the quality of the milling, these must be ground on a surface grinding machine to the dimensional accuracy and roughness (<5RA) required by ISO 148 / ASTM E23

  • Width / Height in hit direction : 10 +0,110 mm
  • Depth                                         : 1 +0,075 mm
  • Roughness                                 : <5 µm (without end faces)

The samples are not yet separated and 3 samples form a rod with a length of at least 170 mm (up to approx. 200 mm).

Clamp up to 12 rods in the sample magazine (magnetic clamp with additional lateral clamping). The thickness (height) of the specimen must comply with the standard. The width (e.g. sheet thickness) may be smaller than the nominal dimension (reduced cross-section). The cycle is started and after only 1 minute perfectly milled notches are achieved. At the same time, the sample is divided into 3 impact bending samples and a remnant.

Alternatively, a disc cutter with a smaller diameter can be used instead of the separating cutter. In this case, the samples are not separated, but a residual web remains. In this case, the individual samples are broken immediately before the test.

MKF milling machine metal notch impact test ISO 148 / ASTM

High-performance metal notch milling machine MKF

Newly developed in 2023 - for the efficient, simultaneous milling of notches and the cutting (or sectioning) of a test bar for 3 impact test specimens of 55 mm each (Charpy / Izod). The test bars are fixed on the travelling table using magnetic clamps and clamping screws. 12 test bars with a length of approx. 170 mm can be clamped at the same time. After closing the safety cover / starting, the travelling table moves the clamping table with the clamped specimens under the extremely stable high-speed milling shaft. The entire milling cycle with simultaneous notch milling and separation into individual samples takes (depending on the material) only approx. 30 - 180 seconds (including return to the start position). Operation is extremely simple and can be carried out by anyone.


- Extremely stable frame with height adjustment via spindle and spindle fixation
- Powder-coated housing
- Base frame coated with special oil chamber paint (oil emulsion resistant)
- Very solid milling spindle with excellent bearings, extremely rigid C-shaped frame
- Oversized milling spindle drive motor: 5.5 kW for speeds: 190 - 465 rpm
- Cutting speed notch milling cutter 38 - 92 m/second
- Cutting speed separating cut 48 - 117 m/second
- Travelling cut with precision linear guides with wipers and roller blind covers
- Drive power feed: 0.37 kW (gearbox 1:26) for milling feed: 260 - 645 mm/min.
- Total power in average milling operation approx.: 4 KW
- Cycle time approx. between 30 - 180 seconds, depending on material
- Emulsion cooling of the milling cutters by means of a circulation cooling system
- Integrated coolant tank 60 litres with coarse filter, chamber filter, circulation pump
- Optional chip collector magnet available
- Clamping device for 12 test bars with 3 samples each = 36 impact bending samples per cycle
- Speed and feed programmable via display
- 60 liter tank on rollers with drain valve, lid, coarse filter, chamber filter, circulation pump

Ready-to-use delivery included

- Parting cutter (saw cut for separation) made of carbide, diameter 80 x 1 mm (or segment cutter for residial 2mm to break before test)
- Contour/notch milling cutter for V-notch 45 degrees, made of carbide, diameter 63 x 2 mm
- Water-based lubricating emulsion (environmentally friendly), can be disposed of with waste water
- Dimensions / weight approx.: 1180 x 700 x 1680 mm / approx.: 1150 kg
- Connection 400V/50Hz 16A plug

The machine is bolted to an extremely solid base frame. A 60 litre recirculating cooling system is housed in this base. The height adjustment (unique during set-up) is guided by a very solid graphite self-lubricating linear guide. The infeed spindle is protected against splash water and milling chips by a dirt roller blind. The control system is installed in a separate electrical box. Once the machine has been set up, operation is extremely simple:
- Open the protective cover
- Unclamp and remove samples from the previous cycle
- Clean the holder from the previous milling process (blow out chips)
- Insert new sample rods to the stop and clamp using magnetic clamps and clamping screws
- Close the protective bonnet
- If necessary, change the milling speed or infeed speed, press start
- Wait 30 - 180 seconds ...

Interested? Enquire now without obligation!