The Affri 250 MRS, 3332 MRS, 3332 MRSA and 3302 MRSA are automatic hardness testers for Rockwell, Superficial Rockwell, Brinell, Vickers and Shore test methods in compliance with ASTM and ISO hardness standards. These are superior quality bench-style testers for the toughest environments or the most meticulous lab applications. The MRS Series are fully motorized for fully automatic test cycles. They offer absolute accuracy (better than 0.5%) in every condition.
How it Works:
Load forces are applied through load cells and electronically controlled in Closed Loop (Pat. Affri). Exact hardness results are achieved on the first test and R&R data is at the top of his class. The user friendly interface features digital durometers with LCD screen, real time statistics, graphs and large archive storage. The MRS Series features hardness testing on all metals: iron, steel, tempered steel, cast iron, brass, aluminum, copper and metal alloys, as well as hard and soft plastics. They also provide heat treatment, hardening, nitriding, cementation and hardfacing.
4 Different Versions to Suit Your Needs
250 MRS Hardness Tester with elevating screw and 8.5" (215 mm) height capacity
3332 MRS Hardness Tester with a large base and vertical head stroke of 11.75" (300 mm)
3332 MRSA Hardness Tester with a large base and vertical head stroke of 11.75" (300 mm)
3302 MRSA Hardness Tester with a large base and vertical head stroke of 20" (500 mm) and 2" (50 mm) Indenter and Clamping-Hood Stroke
All Models Have the Following Features:
Load forces: from 3 to 187.5 kgf (From 29.42 to 1,839 N)
Software: The software controls the whole instrument during the entire cycle avoiding operator errors. Through the user interface, you can set the hardness test method, measurement settings, access and save storable and printable statistics and view results, averages and conversions
One Button Measurements
Just press one button and the hardness tester's head moves down to make contact with the sample's surface, locking it. The hardness test cycle will automatically begin in automatic succession without breaching a phase. Within seconds results appear.
When testing unstable samples or deflecting parts, the AFFRI System will follow the sample without losing contact thanks to its 2" (50 mm) stroke for indenter and clamping hood. Easy and fast hardness measurements on pieces with different thicknesses without acting on tester head or elevating screw.
Closed Loop Technology (Pat. Affri)
Load forces are applied through load cells and controlled in "Closed Loop" with a frequency of 1 khz, assuring perfect linearity in every range. Results are not affected by any structural deflection, misalignment or vibration.
Repeatability and Reproducibility (R&R)
Accurate measurements on the first test, even in extreme conditions, eliminate the need for repeated tests. The R&R data is at the top of its class.
Motorized Tester's Head
Automatic movement with automatic stop when contact is made with samples. Total of 27.5" (700 mm) of motorized vertical stroke. The approach of the head moving to the piece as opposed to the piece moving to the head allows for more accurate, stable and safe measurements.
Clamping System (Pat. Affri)
Secure contact with the specimen is always maintained, even in the unlikely event of any specimen movement during the operation cycle. The clamping system assures perfect stability of any test piece throughout the test cycle, even if it's oiled, rusty or dirty.
The 3332 MRS’s wide work table base is capable of bearing masses beyond 2,204 lbs (1000 kg) which allows for steady hardness measurements on bulky or irregular pieces. It also offers a comfortable working base for small pieces.