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Home  >>  Products  >>  Hardness  >>  PaperSchmidt Roll Hardness Tester

PaperSchmidt Roll Hardness Tester

Conforms to: TAPPI T834

PaperSchmidt Roll Hardness Tester

The PaperSchmidt Roll Hardness Tester is designed specifically for the paper industry to cut costs and increase winding machine efficiency. The need for roll testing - Out of round rolls and other defects such as corrugations caused by non-uniform roll hardness profiles are a major cause of lost production for both producers and converters alike. A reliable measurement of the roll hardness profile is of critical importance in deciding whether a roll is good or bad. Production staff needs to be able to test quickly and reliably and to interpret the results as efficiently as possible.


  • PaperSchmidt is the first rebound hammer designed specifically for roll hardness testing. A new measuring principle and a high compliance plunger provide rollprofiling accuracy and repeatablility that was unachievable before now. In addition to this it has an extended lifetime to cope with the heavy demands of the paper industry and dedicated tools, such as pre-defined tolerances that make assessing a profile a simple matter.
  • Accurate Profiling: Sensitivity and repeatability to a degree unmatched by conventional roll testers. Dedicated firmware allows instant analysis of the data on the instrument’s display.
  • Durability: The PaperSchmidt has a vastly improved service lifetime compared with traditional instruments.
  • Ease of Use: Intuitive operator interface (displaying hardness profiles, limits, roll IDs, etc.). Automatic reloading and automatic data storage allows the fastest possible test performance.
  • Data Export and Analysis: The Paperlink software provides simple tools to make a clear assessment of the results.
  • Unique Design: Combines the simplicity of the rebound hammer method with accuracy that was previously only achievable with much more expensive instruments and provides a lot of useful information about the roll profile.
  • Paperlink: The Windows based software Paperlink makes it possible to download, present and edit data measured by the PaperSchmidt in a fast and easy way using a PC. This allows the user to quickly check the roll profile against user defined tolerances. It also allows the user to define roll identifier names for batch testing and download these onto the hammer. All data can be exported to third party applications. System requirements: Windows XP, Windows Vista, USB-Connector. An internet connection is necessary for automatic updates if available. An internet connection is necessary for firmware updates (using PqUpgrade) if available. PDF Reader is required to show the “Help Manual”.
PaperSchmidt Roll Hardness Tester

Technical Data

Technical Data
Mechanical Data
Impact Energy: 0.735 Nm
Hammer Mass: 135 g
Spring Constant: 0.262 N/mm
Spring Extension: 75 mm
Dimensions of Housing: 2.16” x 2.12” x 9.64” (55 x 54 x 245 mm), 13” (330 mm) to tip of plunger
Dimensions (plunger visible part): 3.7” L x 0.59” diam (94 x 15 mm), radius of spherical tip is 0.98” (25 mm)
Weight: 648 g
Memory Data
No. of series names: 50 series names. Each name can be up to 12 characters long.
Memory Capacity: Dependent on length of test series
Example 1 - 428 series with 10 values per series
Example 2 - 257 series with 20 values per series
Electrical Data
Display: 17 x 71 pixel, graphic
Power Consumption: -13 mA measuring, -4 mA set-up and review, -0.02 mA idle
Accumulator Duty: >5000 impacts between charges
Charger Connection: USB type B (5 V, 100 mA)
Accumulator Capacity: -150p mAh
Environmental conditions
Operating Temperature: 32 to 122°F (0 to 50°C)
Storage Temperature: 14 to 158°F (-10 to 70°C)



Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices

PaperSchmidt, Battery charger with USB cable, CD with Paperlink software, Carrying strap, Documentation, Carrying bag
HA-835501 PaperSchmidt $2,596.00
Optional Accessories/Parts
HA-835531 Plunger complete with plunger spring 199.00
HA-835553 Testing Anvil PaperSchmidt 1,490.00


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