HS-CNC Hollow Grinding Machine

HS-CNC Hollow Grinding Machine for e.g. sporting and hunting knives, pocket and kitchen knives. 2 different machine sizes. Possibility of combination with other grinding machines.


The HS-CNC series (2 CNC-machine sizes) is used to form high-accuracy hollow-ground features into stamped workpieces, such as folding and fixed knife blades, table and kitchen knives and specialty sporting knives. Grinding wheels are angled at 45° relative to the grinding stroke to ensure consistent grinding width for the life of the wheels.

  • CNC piloted feeding axis of the 2 grinding heads with integrated compensation of the grinding wheel wear.
  • Playfree and highly precise linear roller bearing guides, result in an amazing quality improvement and higher precision.
  • Double the non-grinding speed and triple the acceleration reduce the non-grinding time by 70%.
  • Every conceivable shape of the knife shoulder can be easily programmed.
  • PC-CNC control SINUMERIK 840D with Windows®
  • Software DialogPLUS with automatic radius calculation.
  • The software TeachInPLUS automatically sets up of the required CNC program by sensing the shape of the workpieces.
  • Possibility of combination with other machine types (e.g. serration & profile WS-CNC) because of modular method of construction. Due to this processing cells for a complete processing of hand tools can be put together.


Optional features

  • The grinding wheel speed can be adjusted with infinite variability.
  • Automatic feed and automation system with stackable, chain and cassette magazine
  • Technological support and immediate troubleshooting with SIEPMANN-Teleservice
HS 1 - CNC HS 2 - CNC
max. grinding length 150 mm (6") 250 mm (12")
max. vertical stroke 100 mm
grinding wheel drive option: 2 x 5,5 kW (7,5 HP) 2 x 7,5 kW (10 HP) 2 x 7,5 kW (10 HP) 2 x 11kW (15 HP)
grinding wheel Ø 125 mm - 200 mm (appr. 5" - 8") 125 mm - 300 mm (appr. 5" - 12")
grinding spindle bearings preloaded 125 mm (5")
feeding rate 0 - 15 m/min (0-60"/min.)
rapid traverse speed 30 m/min (120"/min.)
capacity of stackable magazine (replaceable) 600 mm (24") option: restackable magazine
chain type magazine with spacer up to 2000 mm (80")
machine weight 2.220 kg (4800 lbs) 2.900 kg (6.400 lbs.)

Subject to technical change without notice