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thanks for the help on an analyzer in previous post. i now find i have another difficulty coupling the sensors i'm considering and the equipment i want to control. the equipment expects a directly propotional 4-20 man signal but the sensor will yield an inversely proportion signal. this is a...

thanks everyone for the helpful responses . . . roydm, i thought about building a 'source' circuit that would allow a standard multimeter to provide a mA reading. I wanted to test the response of some sensors in various installations for which they aren't rated and where i'm trying to work...

sorry, cross posted this from electrical engineering froum, didn't see this measurement and control forum. testing the current loop tester. how important? i'm looking at the extech line of PRC testers that can provide source and sensor simulation for 4-20ma current loop, voltage measuring...

thanks again for more food for thought. so i happened to find brand new 575V 10 HP 6 pole motors on offer from ebay but local pickup. who knew. i'm a little confused on 3 phase options. so called 208/480 ? is the standard? i've got new 575 V 6 pole motors 10 HP on offer right down the...

thanks for these replies. itsmoked seems to capture the problem. i had no idea that thermal overloads had a flakey reputation. i don't run a lot of large motors and didn't realize i could have installed electronic over current protection. this reefer is no longer in refrigeration service...

Need to replace a compressor motor that has always struggled with cold starts and melted down when the overload failed on a cold start. I could have this motor rebuilt again. theoretically it was matched to the load in the day (1950s refrigeration compressor) Its a massive Westinghouse 5 HP...

tmoose, thanks for taking a look a this repair. so .001 diametrical (so that means .0005 actual clearance on avg.?) is enough space for grease? you are definitely right about the post. the turning has been taking place at the outside of the bushing assembly. they tell me the bushing...

hopefully if all goes well there are a picture of a steering link and mounting post below. this is from small gray market japanese truck from 1991. newer models use bearings, oldermodels used bushing constructed of two steel collars bonded by rubber similar to a shock mount bushing. parts and...

found this helpful chart but in conformity to murphy's law it does not include two manufacturers whose bearings i happen to be looking at at the moment, i.e., koyo and SNR. the table doesn't reproduce perfectly here but i think it is interpretable. I found it at...

and there is the question of the oil groove. talking to an engineer at koyo who said that some users/designers have an instinct that the oil groove weakens the outer cup. he seemed to be suggesting that , from his perspective, the oil groove was a non-issue insofar as bearing cup failure or...

geesamand so this confirms what i have sensed, that brass is the upgrade option. Whereas there is not significant thrust on these bearings there doesn 't seem to be a downside to brass. that's what i wanted to know because i have a brass cage bearing available. it is C3 style. it does appear...

OK, got off the phone with Koyo and I misinterpreted what some salesman somewhere along the line said about brass. it's not a brass race, it's a brass cage. Now I figure that doesn't make that much difference. The Koyo engineer said the steel cage is more common and that it is sometimes...

I have removed an koyo spherical roller bearing and have the numerical designation from the race however this really only tells the sizing and not several other features that different manufacturers encode differently from other manufacturers and from their earlier designations. I'm looking for...

This is a piece of standard aluminum gutter so the cross section is a "U" with 2 flat sides at a right angle and the front is an ogee running upwards from the bottom of the "U" at about 65 degrees. During casting I'd run some tape around the gutter to keep the U from spreading open. As I...

Engineering, other than in the simple emperical sense, might be slightly overstating the work on this project but couldn't find another forum discussing rubber properties. I am simply trying to fill a short piece of aluminum gutter with a moderately soft rubber that would cure into maybe a one...