Rockwell Hardness Tester

D

Diggerdog

Joined
Aug 30, 2005
Messages
173
I've just purchased a Rockwell Hardness Tester. For a 200 lb. piece of equipment it looks fairly simple to use. There is a dial on the front for reading the scale and there is a dial for loading weight and a switch for loading and one for unloading. However I won't have the users manual for it for another week. Can someone tell me how to operate this thing. I hate to have a new toy and not no how to use it. Thanks.
 
Digger, what brand is it? do you have a test block with it for calibration? There is a jack screw that you turn to preload the test pc. You turn the screw until the dial reads zero, flip the trip switch lever to put on the final load, wait till the dial settles again and flip another lever to read the rockwell value. Be carefull if you are not sure, the diamond indentor is somewhat fragile and if you break it your are in the $200 range for replacement. PHIL
 
Thank you Phil. It's an Accupro, very similar to a Wilson. It was calibrated this year so it should be accurate, although I am going to buy a test block. I'll give it a try with your advice. Dave
 
OK, give me a call if you need more help. I can give you the benefit of my learning curve on hardness testing. PHIL
 
A good friend of mine whom I work with just got an Accupro rockwell hardness tester and needs the owners manuel, he knows how to operate it but he needs to know what the readings mean. were can i purchase the owners manuel or get information about his scale?
 
Being calibrated once this year won't mean it is testing right Especially after shipping). It needs to be checked with a test block and adjusted frequently. The wooden box that came with the machine usually has a couple of braille points (indenters) and some test blocks along with the various anvils for testing)
Stacy
 
if somebody wants to make a bundle, invent a rockwell hardness tester for about $100 or less. would sell as many as he could make....
 
Actually, the penetrators aren't all that costly to make ( I would guess that it costs about $20-30 to make one). The problem is the small number that are sold. Like cell phones, when they sold a couple thousand a year they cost a fortune. Now that they sell hundreds of million a year, the cost is negligible.
Stacy
 
That is probably why rockwell testers are spendy to. I would think if there was a market for a cheap knock off Grizzly and Harbor Frieght would have them. I would think that if one made a small frame and had a jack screw on the bottom and a device on top to fire the pentetrator with a very consistant force (like a firing mechanism from a rifle bolt with a diamond tip) all you would need is a way to measure the up force exserted by the bottom screw (heavy spring on the top tool housing and a dial indicator) and then another indicator to measure the top of the penetrator after the strike to measure the amount of penetration. That and a set of known test pieces to calibrate should work. I am sure you would need very good indicators. It must be a market thing or small ones for a couple hundred would exsist. Industrial diamonds are not that spendy.
 
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