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ZigFire	27/03/2011 10:37:14
32 forum posts	Okay, my two bobs worth. Never leave the chuck key in your lathe chuck. Very easy to do especially if you don't have an interlocked cover over your chuck. Did this once, started the lathe and the key flew out and hit me in the chest and it hurt! Haven't done it since I can tell you. Cheers Michael
Ian S C	27/03/2011 11:03:19
7468 forum posts 230 photos	Came across an interesting one during my time as a nurse in a country hospital. A chap came in with the end of his finger off, it was reattached, and he recovered well. A few months later some one asked him how did he do it, oh I was mowing the lawn (he was again mowing the lawn), and I did this, he stuck his hand under the skirt of the rotary mower to lift the mower on its side without waiting for it to stop. This time he lost two fingers, and the were not reattached. The chap was not normally considered unintellegent! Ian S C ps H&S is getting up a few peoples noses here with regard to access to buildings and areas in Christchurch, although that is improving now. Ian S C Edited By Ian S C on 27/03/2011 11:08:14
Steve Garnett	27/03/2011 11:48:33
837 forum posts 27 photos	Posted by ZigFire on 27/03/2011 10:37:14: Okay, my two bobs worth. Never leave the chuck key in your lathe chuck. Did that on page one of this thread... only I said all chucks - I've seen a key fly out of a drill press with quite spectacular results. If you use C spanners, make sure that they are fully engaged before giving them a good yank. (don't ask) Put up a small shelf just for your tea or coffee mug - neither liquid makes an adequate replacement for suds... Don't clutter up the floor around machinery - you tend not to concentrate on what your feet are doing when you are using it, after all. And after reading the rest of the thread, I was tempted to say something about alcohol, but I'll leave that to somebody else! Edited By Steve Garnett on 27/03/2011 11:49:52
GoCreate	27/03/2011 12:03:41
387 forum posts 119 photos	Posted by Ramon Wilson on 27/03/2011 09:58:10: Never machine - mill or turn - anything that is held with just one clamp but always use a minimum of two with the packing only very slightly higher than the work or interpose a small pad between work and clamp to spead the pressure. A thin sheet of paper beneath the work will increase the grip considerably + where possible keep the distance from the stud to the work shorter than the distance from the stud to the packing. This increases the leverage in favour of the work piece thus increasing the clamping load holding the work piece . Nigel
Terryd	27/03/2011 12:16:16
1946 forum posts 179 photos	Posted by ady on 27/03/2011 02:59:49: I feel that this thread is pretty unbelievable. If you're a moron then machine tools will soon tell you this. Ady, Don't be so dismissive of everything that doesn't fit into your belief pattern. There is a difference between an 'unknowing beginner (I wont use the correct word 'ignorant' as that has been demeaned by modern usage)' and a moron'. In your definition we were all morons once. With regards, Terry
Andrew Johnston	27/03/2011 12:35:16
7061 forum posts 719 photos	Do not wear gloves when operating machinery - if it gets caught, it'll drag your hand in. Do wear gloves when welding - they protect against burns. Regards, Andrew
John Stevenson	27/03/2011 12:53:18
5068 forum posts 3 photos	Posted by Terryd on 27/03/2011 05:15:17: Do not disconnect guard interlock switches. Terry WHY ? None of the Myford, Boxfords, Harrisons etc I have owned have never had them so they must have been considered safe in their day because at the time we still had factory acts and inspectors. I often have to hold large motor flanges to resleeve the bearing housing. Often this means holding just by the shallow register, often only 5mm on a large 18" housing which is scary. So I fit a washer inside the bearing recess and a long drawbar right thru the spindle to a washer and nut on the outboard side to hold it all together. It is then impossible for the flange to fly out the chuck. However to do this I have to have the change wheel guard open, it's only a tin cover and not a flanged guard so the gears are still inside but taking your advise if the guard is open and the drawbar fitted the machine won't run. If I leave the drawbar out the machine will run but is it safe? It's all down to common sense which, and this is from a H&S guy, because it can't be defined it cannot be used or quoted. Sucess in this world is measured in how much you have, not rules on pieces of paper. John S.
GoCreate	27/03/2011 14:02:44
387 forum posts 119 photos	Some machining operations produce long stringy swarf. Never under any circumstances be tempted to clear swarf while the machine is cutting or running, not even using a stick or anything, you could lose fingers in an instant. Peek drilling will prevent long stringy swarf or when turning experiment with different tooling, if using HSS grinding a chip breaker (groove ground just behind the cutting edge) can break up the swarf and make the turning operation safer. An obvious safety precaution but one easily forgotten or ignored, always wear eye protection It's not nice to lose any body parts but to lose an eye! Nigel
Terryd	27/03/2011 15:59:04
1946 forum posts 179 photos	Thank you Graham for answering John with exactly the same themes that I was going to, However John, I will add that in my second career as a teacher I have used many, probably dozens, of Boxfords and Harrisons as well as Colchester students etc and all had interlocks on relevant doors and chuck guards. As an example of he unexpected, I heard that at a previous school a teacher was demonstrating a lathe process to a number of students (remember that in a school workshop class these days there will be a minimum of 25 and often 30 students) when he heard a scream from one of the class. The inquisitive child had stuck his finger into the rotating end of a Boxford spindle despite warnings and movable cover and the finger was detached and still rotating in the spindle. the scream, by the way, came from a female student standing nearby who had been sprayed with blood. In another incident in Northants some years ago a student 'shouldered arms' in fun with at 10" file. The handle was loose and the file flew across the room and the tang stuck in the back of the neck of a fellow classmate. He died a week later. So another no no, don't use files with loose handles. Regards Terry P.s. Our lathe chuck keys had a spring around the square end so a positive force had to be applied to push it into it's socket. The Key could not stay in the chuck if the pressure was released. Bit of a pain when you had to wind the chuck a long way, but no more flying keys. T Edited By Terryd on 27/03/2011 16:05:42
John Stevenson	27/03/2011 16:32:01
5068 forum posts 3 photos	Posted by Terryd on 27/03/2011 15:59:04: P.s. Our lathe chuck keys had a spring around the square end so a positive force had to be applied to push it into it's socket. The Key could not stay in the chuck if the pressure was released. Bit of a pain when you had to wind the chuck a long way, but no more flying keys. T Terry, Those springs are brilliant. You pull them off and keep them in the drawer with the parallels, when you come to use a pair of parallels in the vise, stick the spring inbetween them to stop them falling over and tipping. John S.
mgj	27/03/2011 16:40:31
1017 forum posts 14 photos	Excellent idea John - now I'd better see if I can find my sprngs - I did keep them - somewhere.
NJH	27/03/2011 17:50:58
2314 forum posts 139 photos	Be VERY careful how much material is hanging unsupported out of the LH end of the lathe mandrel. Even quite thick bar can instantly bend at right angles and flail around in an alarming and potentially lethal manner. I've not done it myself but have witnessed it - you don't forget something like that!
Clive Hartland	27/03/2011 19:44:43
2929 forum posts 41 photos	All machine tooling in educational establishments have to have safety interlocks. In the manufacturers brochures they are advertised for that purpose. clive
Steve Garnett	27/03/2011 20:14:46
837 forum posts 27 photos	I'm rapidly coming to the conclusion that what this thread needs is all of the actual horror stories - they all make their own points rather well, don't they? My C spanner that I said not to ask about resulted in me flying backwards into what was fortunately an empty space, and I ended up doing what was described as a very neat backwards roll that I wasn't expecting to, although I sustained no injuries. And It is another reason for not cluttering the floor up, as well.
Nicholas Farr	27/03/2011 20:35:00
3988 forum posts 1799 photos	Posted by Andrew Johnston on 27/03/2011 12:35:16: Do not wear gloves when operating machinery - if it gets caught, it'll drag your hand in. Do wear gloves when welding - they protect against burns. Regards, Andrew I'll second the piont about welding gloves, and add this includes ultra-violet burns (sunburn) for those that don't realise that any form of arc welding produces both hot metal and radiation burns. In fact all parts of your body should be covered while doing any kind of arc welding. Regards Nick. Edited By Nicholas Farr on 27/03/2011 20:40:38
mgj	27/03/2011 20:56:48
1017 forum posts 14 photos	Try not to use a magnetic chuck to hold stainless on a big surface grinder. (on anything I suppose).
methusala	27/03/2011 21:03:00
32 forum posts	Hi All, A few years ago whilst working at a bench with the grinding shop directly behind me, an 'experienced tool maker' was truing up a grinding wheel on a surface grinder. There were no guards in place and he had placed the diamond dresser on the wrong side of the wheel, I expect you can guess what happened next. the wheel picked up the dresser taking it through wheel the and bursting it. I do not know how the the burst wheel or dresser missed me, but they did. The toolmaker in question got a monumental b*******g, and the grinding shop was enclosed p.d.q. I can tell you I very nearly had to go home for a change of underwear!!!!! Colin.
Ian S C	28/03/2011 11:19:40
7468 forum posts 230 photos	After changing wheels, or other work on any grinder, whether a bench grinder, or an angle grinder, run the machine for a miniut or two, but keep out of line of the stone/ wheel. I did a hobby course at the local high school, a while back, and I noticed that the workshop machine area was surrounded by a cord at easy hand hight, a pull on this switched a master switch off. Ian S C
ady	28/03/2011 11:32:51
612 forum posts 50 photos	I've mentioned these before. You can get three for a fiver at some of the Morrisons garages. Handy for starting up a group of sockets in awkward places. Also handy for a test startup on a big job because you can stay well away from it as it comes up to speed, and handy for when you have to run away and switch off from a safe distance. Just remember not to leave the controller lying next to the lathe. REMOTE CONTROLLED SOCKETS Edited By ady on 28/03/2011 11:34:37
Jeff Dayman	28/03/2011 12:51:04
2356 forum posts 47 photos	Remote control devices whether infrared or radio frequency can be triggered by stray signals. I would advise you not to use these remote control receptacles for any tools or power machinery. I personally have seen stray morning sunlight turn on and change channels on a TV facing the sunlight. Apparently there were frequencies and pulses of light coming in that had the same characteristics as the infrared system on the remote control. I have also seen some radio control units for large industrial robots go out of control due to interference from an overhead crane radio remote control in industry. The robots were operating inside wire safety fences with a man-exclusion safety interlock so no one was hurt but a lot of parts and tooling were severely damaged. The accident investigators found that the crane and robot control units operated on exactly the same frequency which is not supposed to happen. From that point on I always ask if anything is radio controlled when I visit a factory, and if there are radio control items, I won't go anywhere near them (or under them in case of cranes). Bottom line, I don't trust life and limb to any radio remote control, but especially consumer grade ones. JD

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