Posted By Robin M To the best of my knowledge there is no real guidance. It will depend on 2 things. A training company may give an expiration on a course they provide. You will have to adhere to any validity limits they put on there training. Secondly your own Risk Assessment. Think of how often those involved are using Ab Wheels etc when doing this. In my opinion you should refresh annually for abrasive wheels. It doesn't have to be a big course, just a couple of hours to go through everything. Would be interesting to hear other points of view.

Posted By Derek Williams Hi Guy's, Thanks for the responce, as I first thought quite a grey area but to ensure some sort of compliance a refresher would be wise, it is to cover, inspection and dressing of bench grinders. Regards, Derek.

Posted By Robin M I disagree. The training given should be taylored to what is required. In the regs it only refers to mounting of the wheel, but a training course should incorporate mounting, safe use, gaurds, noise, vibration, PPE etc etc etc. Whatever is required to train the person as an operator, not merely a wheel changer. Competence should still be monitored by supervision until you are happy a person is competent, but the training should teach the skills.