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Albert Gnehm (Swiss Made) Rockwell Tester user instructions
Q. My job function is as R&D Design Engineer responsible for all new product development. We have in-house a bench type Rockwell Tester that has been sitting in storage and not calibrated since 1995. My purpose would be to use this tester (after being lab certified) to verify Rockwell ranges of heat-treated parts in-house only. My only question is, and to be brutally truthful, I am not sure on the correct method of performing hardness test with this kind of tester. We currently have no qualified personnel that are familiar with this unit. There is no in-house literature to be found on this unit. Fortunately there seems to be accessories that go with the unit, but no user instruction manual. Is anyone familiar or have information on this particular tester?
Any information or leads would be greatly appreciated.
Jose Tuero- Ft. Lauderdale, Florida, U.S.A.
2002
A. Hello Jose!
There are a few things I'd suggest. First, read through the excellent FREE handbook that NIST has prepared on Rockwell hardness testing, found at www.nist.gov/public_affairs/practiceguides//practiceguides.htm^ www.nist.gov/customcf/get_pdf.cfm?pub_id=853006. That should give you the information on how the tester works.
Secondly, you'll need -- not want, need -- a copy of ASTM E18 on Rockwell hardness testing, available from the ASTM website.
Thirdly, check with a mechanical calibration house in your area: they'll likely have someone who can calibrate the machine for you. It won't be THAT different from the other Rockwell hardness test machines that they'll be familiar with...
Good luck!
Lee Gearhart
metallurgist - E. Aurora, New York
2002
Ed. note: A lot of people have been looking for that company here for many years. If anyone has any info it would be appreciated. Meanwhile, Lee has offered great advice, and we've updated the link to the NIST manual.
A. Are you still in need for your Manual? Because I used an ancient hardness-proofing machine of GNEHM today and had a Manual for it.
Dino Trovatelli- Islisberg,Aargau SWITZERLAND
November 11, 2014
Q. We need to contact ALBERT GNEHM, manufacturer of our hardness testing equipment. Does anyone have their address, e-mail or phone number? Many thanks!
J Rowemanufacturing - Haguenau, France
2003
Q. We need to contact ALBERT GNEHM, manufacturer of our hardness testing equipment. Does anyone have their address, e-mail or phone number?
Many thanks!
Derek Daviesindustrial supply - Leominster, Herefordshire, UK
2004
A. Anyone can contact Albert Gnehm at www.gnehm-haertepruefer.ch
Marco Chiappina- Lima, Peru
February 11, 2013
2004
RFQ: I'm Andy Lee, a Materials Science Ph.D student. My thesis topic is on Zirconia-Toughened-Alumina (ZTA) Nanocomposites and Cerium Oxide-Alumina Nanocomposites. I have an indentation machine - Albert Gnehm Universal Hardness Tester - OM-150, for me to do hardness and toughness test for my materials.
I would like to source a VICKERS Diamond Indenter for this machine. It doesn't matter if it is original or OEM as long as I can use it with load from 10kg-50kg.
Please do not hesitate to contact me if there's any queries.
Many Thanks!
Andy LeePostGrad Student - Sydney, New South Wales, Australia
Ed. note: Sorry, this RFQ is old & outdated, so contact info is no longer available. However, if you feel that something technical should be said in reply, please post it; no public commercial suggestions please ( huh? why?)
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