I recently added a pair of 8" pedestal grinders. On the first one I have a braided wire wheel and a coarse Norton (Gemini) general purpose coarse wheel. Was lead to beleive it was US made but is in fact made in China. Seems to work well. I use it for general grinding.
On the other grinder I have a 60 grit white alum oxide, J hardness, Norton wheel (was $40 from MSC) that I use stricly for grinding HSS. It works well. On the other side I have a brown norton wheel that came with the grinder, the wheel is probably 20 yrs old, it is med grit. I think it is a surface grinding wheel actually. I use that for general grinding when my coarse wheel is too coarse for the task.
These are older Brown & Brockmeyer 3-phase grinders. They are controlled by the same VFD that controls my mill. I keep all the machines switched off and only turn on the one I wish to run at any given time, and control it from a For-off-rev switch w/ a speed pot. I wouldn't recomend 3 phase grinders but they work, one grinder was free, the other was $20. The price was right and they were on pedestals.
Sell your cheap import bench grinder. Getting these B&B grinders setup made grinding HSS tool bits much easier.
Finding grinding wheel info is very difficult. I put a lot of effort into research before I bought my wheels, good info is hard to come by. Use the search function here, and there are some things on the
mark
Kinda waiting for some more experienced people to post, but hey I'll bite here. I used a cheap import 6" grinder for years and my results were less than spectacular and always difficult to get.I recently added a pair of 8" pedestal grinders. On the first one I have a braided wire wheel and a coarse Norton (Gemini) general purpose coarse wheel. Was lead to beleive it was US made but is in fact made in China. Seems to work well. I use it for general grinding.On the other grinder I have a 60 grit white alum oxide, J hardness, Norton wheel (was $40 from MSC) that I use stricly for grinding HSS. It works well. On the other side I have a brown norton wheel that came with the grinder, the wheel is probably 20 yrs old, it is med grit. I think it is a surface grinding wheel actually. I use that for general grinding when my coarse wheel is too coarse for the task.These are older Brown & Brockmeyer 3-phase grinders. They are controlled by the same VFD that controls my mill. I keep all the machines switched off and only turn on the one I wish to run at any given time, and control it from a For-off-rev switch w/ a speed pot. I wouldn't recomend 3 phase grinders but they work, one grinder was free, the other was $20. The price was right and they were on pedestals.Sell your cheap import bench grinder. Getting these B&B grinders setup made grinding HSS tool bits much easier.Finding grinding wheel info is very difficult. I put a lot of effort into research before I bought my wheels, good info is hard to come by. Use the search function here, and there are some things on the Chaski machine board that Marty runs. You might even find some of my threads where I asked for guidance a few months ago.mark
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Prayers for you Dave.
I will play devils advocate here for a bit. I have seen osha regulations render brake presses unusable for the job at hand, lathes all but useless for the job at hand, and CERTAINLY grinders useless for the job at hand. I have to give superflux some props here as he has a valid point. Eight inch beam grinding a weld or preparing a joint in PLACE...there is no damm room for the handle!!!! I could probably name 100 other cases in short order where it simply will not work....including guards on multiple types of grinders. Having said that I believe its up to the person doing this work to present the issue to the safety team and work out a "best case soulution" to reduce possibility of injury as much as possible. BUT because of ambulance chasing SOB'S often the answer is we cannot do it that way, thats it period. That is a failure of the insurance industry, the employer, and the safety team to deal with a real world problem of the operator. It's unfortunate but its very real and happens daily. It's my personal belief that 100% of workers do not want to get hurt, 99% care about following the rules of the job, and 50% of them get extremely frustrated at some point or another by trying to perform their job under the constraints imposed by the safety authority.
Having said all that there is absolutely nothing wrong with saying I cannot do the job because....and point out the safety issues with it. Let the powers that be figure the solution...if its wrong then show them why its wrong. Sure you may run into the cases where the strawboss will send someone else up and turn there head while they do just what you suggested (break the safety rules) and try to make you look bad cause they took care of it and you did not.....but thats a social/political issue on a job and you still get to go home knowing you did the right thing.
Point being all processes have a flaw somewhere, there is no all encompassing set of rules that allow the work to get done and at the same time insure ultimate safety. It really is a microcosm that applies on a case by case basis, job by job basis. This is where the safety officer needs to have the POWER to implement procedures that at times may override the recognized general procedure bodies like the insurance regulators and OSHA....I guess in the end that requires serious trust between the safety officer and the employer. Most safety executives are educated people with little practical experience in the jobs in which they are applying rules....this is fine as long as that person can be hands on and physically view and deal with production issues. The type that just impose rulings based on what they have read without observing the real world scenarios on the job site are useless as tits on a bore hog. On another note safety leads or shop safety officers need to take thier job seriously and need to be capable of putting social or buddy system issues out of the way of their decision making process. Overall in my experience the safety authority on most jobs is not chosen carefully enough....its a secondary consideration...like oh crap we got to nominate someone who is willing? Lots of problems stem from that point. A safety authority of any rank must truly be interested in two things: 1. Nobody gets hurt. 2. we have to get the job done as efficiently as possible without anyone getting hurt. I do not give a crap what your doing ....that job is a tightrope walk and if you do not really care, you will do it poorly.
This stuff drives me crazy, but in the end most of the problems occur because someone said screw it out of frustration. Lack of good communication causes most accidents.
Regards
Tommy
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