Recent content by Ozwes007

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  1. Ozwes007

    Parting tool chatter

    Speed should be 2/3 of your cutting speed, don’t go slow, it makes it worse! Check your chuck to ensure you have zero play in the job, you would be surprised as to how many lathes have small amounts of play in the head bearings and have bellmouth chuck jaws. Use a TDI to check, and put some...
  2. Ozwes007

    Software in the cloud

    Floppy drives can be replaced with USB/floppy converters. Did one for an old CNC at an engineering company 6 months ago. The cloud issue is a very big problem, too many people have data that just completely disappears or is hacked. And I’m not talking small companies as cloud service providers...
  3. Ozwes007

    Software in the cloud

    Just so you are aware, Apple run 2 operating systems, one is completely Linux based and the other(not used much at all) is apple’s proprietary system. So Big companies do make billions out of Linux. Point 2 is cloud won’t be all encompassing as two many countries have internet infrastructure...
  4. Ozwes007

    Piston ring rotation

    I have seen that before, the experimentation was done on lower revving engines. Graeme Bell and Smokey Yunick both proved the rotation and disproved the gap theory findings with the use of extensive Dyno testing on Race motors in both 2 stroke and 4 stroke configurations. As the revs increase...
  5. Ozwes007

    Piston ring rotation

    The gapless rings are used in race engines, the losses are real in HP loss at the high end of the rpm range. We can be talking no more than 1- 2%, however that 1-2% can win or lose a race.production engines would not benefit from this to any great degree except fuel economy in the long term.
  6. Ozwes007

    Piston ring rotation

    Rings rotate naturally in engines, there is a formula to work it out however the usual is 1 rev per 1000 rotations. Hence the reason two stroke rings have a pin to make sure they don’t rotate. Compression loss though rings is usually based on your side clearance and back clearances, or not...
  7. Ozwes007

    Trouble with cut off operations

    Parting off is relatively simple. Set tool height at centre, keep your spindle speed at around 2/3 of your turning speed(don’t slow it down to much, that will make it worse) and power feed or hand wind in the same feed rate you face with. Parting through with a hole , use a small loose fit drill...
  8. Ozwes007

    New Shop layout - advice sought

    Just a few thoughts. I had nearly the same setup from Hare&Forbes, a 52 instead of a 48 mill, and I CNC’d my small mill drill. What I would do is place your compressor outside in a little covered area(cuts noise), don’t deadhead your lathe, leave room to get to it and to place material through...
  9. Ozwes007

    pre drilling for holes

    Drills and drilling. Today’s drills usually come in 5 flavours. 1 cheap and nasty - Carbon steel. 2 cheap - M02 (straight HSS)HSS with or with out coatings- coating only lasts as long as the moment you wear through it, then it’s just a M02 HSS drill. 3 M35 HSS ( 3-5% cobalt HSS) with or without...
  10. Ozwes007

    Machining aluminum and heat

    Just my 2 cents. 6000 grade Aluminium is one of the best grades at machining, machines cool, doesn’t stick to the tool often, and produces close tolerance parts all day long. Aluminium of any type will stick to tooling if you don’t use a lubricant and a coolant. The reason is aluminium when...
  11. Ozwes007

    3D Printed Patterns

    Very nice. Did you allow for shrinkage? If so was it the standard 2%? I’m asking as I’m thinking of using 3d printed wax to cast some aluminium parts, and would like to know if the standard seems to work and is reasonably accurate to dimensions.
  12. Ozwes007

    Safety Turning

    Stringing with Stainless steel is common as it is a malleable metal unless it’s overheated. Increasing speed with light cuts(remember your cut needs to be at least the radius of your tool plus a bit) ensuring that it remains cool helps. Stringing is common in steels that are not designed for...
  13. Ozwes007

    Cheap (Chinese?) Carbide Tips

    One other thing you may need to be aware of is the tool holder in all this. Cheap holders are made from inferior materials. I have seen this to many times to discount it. Boring bars are usually the easiest to see this in. You will get from mild to wild harmonics and tip seat distortion in these...
  14. Ozwes007

    Cheap (Chinese?) Carbide Tips

    Just my 2 cents worth. I use carbide inserts nearly everyday at work in lathes and mills, cutting anything from bearings to 1040 grades steels, plastics, aluminium, brass, bronze etc etc. in most cases I use Iscar, or kenametal inserts. Fact 1 is that a better grade(not quality) for the...
  15. Ozwes007

    DIES HSS or Carbon Steel

    The idea between grades of steel used in Taps, dies, drills and machine tools is predominately what they can cut. Normal medium-high carbon steels are good to about HRC(Rockwell) 20-25 , while your HSS without Cobalt (T1,M2 grades) used in general run of the mill taps , dies and drills is good...