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Hardness Testing

Equotip 550 Portable Rockwell

Hardness tester for scratch-sensitive, polished and thin parts.
  • No thickness limitation of tested objects - perfect for thin metal sheets
  • Faster than stationary Rockwell hardness testers, yet very accurate
  • Purely material-independent method thanks to the direct measurement of the indentation depth

Applications:

Hardness testing of thin metal sheets and wires / Hardness testing of casts, flanges, shafts, and bars/pipes / Quality and wear control of turbine blades and brake systems

Extremely precise, and material independent version of conventional Rockwell method
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Resolution & depth
The only portable measurement method that has practically no minimal thickness limitation - perfect for thin sheets of metals, any material.
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Versatility
Equally reliable, accurate and standardized but faster than stationary Rockwell hardness testers.
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User Experience
Material independent method - that can be combined with Leeb and UCI in one measurement device. One device - all applications.
Equotip 550 Portable Rockwell Tech Specs
Sensor
Tech Specs
Native Scale
µm, µinch

Available Scales
HB, HV, HRA, HRB, HRC, R15N, HR15T, HMMRC, MPA

Available Probes
Portable Rockwell Probe 50N (can also be connected directly to PC)

Combination With Other Methods
Leeb, UCI

Average Roughness Ra (µm / µinch)
2/80

Minimum Mass (kg / lbs)
No requirement

Minimum Thickness (mm / inch)
10 x indentation depth

Instrument Firmware
Automatic compensation for impact direction
Personalized user profiles and views
Integration in automated testing environments (incl. remote control)
11 Languages and timezones
Measurement wizards
Custom curve wizard
Combined method wizard
User guidance features
Custom report features
One-step calibration
metric and imperial units support

Pc Software
Equotip Link allowing direct reporting and custom reports

Display
7” color rugged touchscreen unit (800 x 480 pixels) with dual core processor

Memory
Internal 8 GB flash memory (> 1’000’000 measurements)

Connections
USB host / device and Ethernet

Measuring Range
0 - 100 µm; 19 - 70 HRC; 35 - 1‘000 HV

Verification according to
DIN 50157, custom method, combined method

Protection
IP54, fully rugged with shock-absorbing casing

Custom conversion curves
Yes, 1-point shift, 2-point, polynomial

Measuring Accuracy
± 0.8 µm; ~ ± 1.0 HRC

Innovation Award
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FAQ

What is the mass limitation for samples tested with portable Rockwell?
Portable Rockwell method can be applied for any metal object regardless of its mass.

What materials can be investigated with portable Rockwell and what materials require corrections?
Portable Rockwell can be used to investigate any type of metal objects. Portable Rockwell is based on direct measurement of penetration depth and therefore does not require any material correction. Portable Rockwell is only limited by the thickness of the tested object that shall be larger than 10 x indentation depth. It is hence perfect for thin metal sheets.

What is the principle behind the portable rockwell method?
The Portable Rockwell metal hardness tester is based, as its name suggests, on the static Rockwell measuring principle where the penetration depths under a defined preload are measured before and after application of a large force. During measurements with the Portable Rockwell probe, a diamond cone indenter is forced into the test piece to be measured and then released back out of the material. The indentation depth of the diamond is continuously measured while the load is applied and released. From the indentation depths d1 and d2 recorded at two defined loads, the difference is calculated: Delta = d2 – d1. The difference Delta reflects the plastic deformation and therefore is a direct measure of the hardness of the material. The Portable Rockwell method covers a wide range of applications like hardness measurements on small, light, thin, walled or tubular test objects, but also large and heavy objects can be tested as long as the surface roughness and grain size are small enough.

What is the minimum thickness of the thin metal sheet that can be successfully tested with portable Rockwell?
Test objects should have at least 10 times the thickness of the penetration depth to avoid influences on the measurement value. The penetration depth and so the minimum thickness can be assessed from the attached plot when knowing the approximate hardness value in HRC.
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Standards & Guidelines

Standards

  • Arrow, click names to download Standards & Guidelines DIN 50157

Guidelines

  • Arrow DGZfP Guideline MC 1
  • Arrow Nordtest Technical Reports 424-1, 424-2, 424-3
  • Arrow VDI / VDE Guideline 2616 Paper 1