PaperSchmidt Paper Roll Hardness Tester

PaperSchmidt Paper Roll Hardness Tester

Paper / Films / Foils

Paper Roll Hardness Tester – PaperSchmidt

PaperSchmidt Paper Roll Hardness Tester
PaperSchmidt Paper Roll Hardness Tester

The PaperSchmidt is the first rebound hammer designed specifically for paper roll hardness testing. Extensive field tests carried out at major manufacturers and converters in the US and Europe have consistently shown that it provides previously unachievable roll-profiling accuracy and repeatability.

The instrument is fully compliant with the TAPPI T834 om-07 standard used in North America to regulate roll hardness testing and it delivers instantly all of the key parameters required for assessing the quality of paper rolls.


  • It has a high compliance plunger and a revolutionary measurement principle that is independent of the angle of impact. This gives the PaperSchmidt its “Best in Class” roll profiling performance.
  • The paper roll profile can be viewed directly on the integrated display.
  • The user interface is highly intuitive and language independent.
  • The instrument provides an automatic calculation of the average paper roll hardness, the range and standard deviation.
  • It can also be programmed to indicate immediately if pre-set max/min values are exceeded.
  • A high quality robust construction, a sealing system and specially treated impact plungers greatly extend the lifetime of the instrument beyond that of any comparable product – significantly reducing maintenance costs in a heavy usage industry.
  • The unit can be easily programmed for individual user requirements


  • Paper industry
  • Foils, films and other plastic sheet materials


  • TAPPI T834

Technical Data

Mechanical Data
Impact energy0.735 Nm
Hammer mass 115 g
Spring constant0.262 N/mm
Spring extension75 mm
Dimensions of housing55 x 55 x 250 mm (2.16” x 2.16” x 9.84”), 340 mm (13’’) to tip of plunger
Dimensions (plunger visible part)94 x ø15 mm (3.7” l. x 0.59” diam.), radius of spherical tip is 25 mm (0.98”)
Weight 570 g
Memory Data
No. of series names50 series names. Each name can be up to 12 characters long
Memory capacityDependent on length of test series
Example 1 - 401 series with 10 values per series
Example 2 - 246 series with 20 values per series
Electrical Data
Display17 x 71 pixels, graphic
Power consumption~13 mA measuring, ~4 mA set-up and review, ~0.02 mA idle
Accumulator duty>5000 impacts between charges
Charger connectionUSB Typ B (5 V, 100 mA)
Accumulator capacity~150 mAh
Environmental conditions
Operating temperature0 to 50 °C (32 to 122 °F)
Storage temperature-10 to 70 °C (14 to 158 °F)
DYWIDAG-Systems International GmbH

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