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  1. ABritTurner

    Keeping the tops of 3 tapers level - Tolerancing /Production

    From my understanding you have 4 parts, 3 of which have a taper of 20 degrees included angle. One of these parts is supplied as is and has a huge tolerance (20 thou). If this tolerance is a tapeered part then it seems you do have a problem. The only way you can manage this is to match each...
  2. ABritTurner

    Young engineer confused about career track

    Be glad you have a job, Throw yourself into your work and enjoy the sunshine Have fun with meeting people and enjoy life. Quit whining and get on with life. Some people are born without any arms and some are born dull.
  3. ABritTurner

    Materials for Bearings: Sliding (Hydrodynamic) and Rolling element

    Contact a contractor that specialises in Silicon nitide and ask him, he will probably be pleased to send you his literature.
  4. ABritTurner

    Brinell to Rockwell hardness conversion

    There are printed tables available of Rockwell-Brinell conversions and have existed for many years. Most steel suppiers will furnish you with a hard copy of their literature. Macready steels comes to mind.
  5. ABritTurner

    Unfamiliar screw thread

    You don't say if it is an internal thread or an external thread. An external thread has a large tolerence on the major diameter. But as the gentleman said earlier this is not a clipped 11/16 UN thread, it is a bastard thread. It is 1.6 thou less than a 17 mm thread but is not metric because of...
  6. ABritTurner

    i have a problem

    I notice there is an American pump manufacturer called Worthington Pumpss, is that the pump you have? I notice you have increased the prime mover HP by 40%. Did your flow improve from the original motors? Surely you will contact the pump manufacturer and ask for specifications for these pumps...
  7. ABritTurner

    i have a problem

    Changing impellers on multi stage pumps can be an expensive business and take weeks to complete. If they are single stage pums there is still a lot of work to be done. Condider buying an extra pump to increase the flow if possible. Alternatively you may strip one of the pumps and check up on...
  8. ABritTurner

    1 1/2-20 thread male connection

    Yes, $100 is cheap, Brass would do and is inexpesnive, depends on the value you place. I meant to post T(in) Titanium nitride coating.
  9. ABritTurner

    Machining non parrelell surfaces with edgecam

    If the part is completed using two separate setting you still have the problem of blending in the two separate cuts, but if it is not critical this may suffice. Generally speaking operations should be completed as far as is practicable in the same setting. Hence when turning a coupling for...
  10. ABritTurner

    Mill operations

    If the material is difficult to machine (say 316 stainless ) then drill last as the holes can be hard on the inserts and your cost go up. If there is risk of movement in sizes you may have to rough out first and then final machine toleranced. sizes. If you have to machine a long and difficult...
  11. ABritTurner

    vertical face mill

    Then you have to buy propriety side clamps that press into the sides of the work-piece and exert a downward pressure, you can also design them yourself, it's old technology. If you have the room you can make up blocks to clamp to the table and use an M20 tapped hole with a bolt. Drill the...
  12. ABritTurner

    Use of 316L piping in offshore at high temperature

    160 C is not that hot, 316 is the salt water standard steel. If you really need salt water protection and high temperatures you will have to look at a Nickle based products and they are much more expensive. If you are using in a sub sea environment your really have to do the research yourself...
  13. ABritTurner

    vertical face mill

    Even with grinding he still has to work out how to hold the job down on the table if the material is non-magnetic. He can sub-contract the job out but I guessed he is wanting to know how to do it if it is to be done in-house.
  14. ABritTurner

    Crimp Confusion

    You have to make a crimping tool in two halves as with a scissors. You will need to design the tool carefully and experiment a little to get it right making allowances for how much give is in the material. It's not my field but I have see toolmakers do it and that is something they specialise in.
  15. ABritTurner

    1 1/2-20 thread male connection

    If you cannot obtain the manufacturers part then you only recourse is to make one. It won't be cheap but a good precision or toolmaking company will make a thread connection for you and coat it with anti galling or T(ic) coating so that it will not gall. I would expect a company to charge you...
  16. ABritTurner

    Machining non parrelell surfaces with edgecam

    If you have conventional milling machine tool (traditional Cincinnati) you can fly-cut the flat surface with a form tool. Fly cutting is a traditional way of machining a flat surface with a blend in radius, other ways are to use a shaping machine or a planning machine depending on the size of...
  17. ABritTurner

    vertical face mill

    The problem with top clamping is that the clamps have t be moved at some time during the process, this means there will be great difficulties i.n blending the cuts in and usually you get a stepped surface. Even when using side wedge type clamps the operator has to make sure that the bottom is...
  18. ABritTurner

    Fillet Weld Size Based on Loading

    Wouldn't the shear strength of the weld be determine by the cross sectional area times the tensile strength of the electrode?
  19. ABritTurner

    vertical face mill

    You are asking for a disaster if you don't lock the plate to the bed in the vertical plane. Most importantly you could injure your operative and that could cost your company big bucks. It's just bad practice not to lock a job down securely when machining. There are a number of ways to do this...
  20. ABritTurner

    Stress relief of machined castings

    Under certain conditions: 1. size of casting, 2 type of material, 3. amount of material to be removed 4. complexity of shape of component Some components are best heat treated twice, from memory the old British classed material EN25 (moly steel) required such double heat treatment. Once to...

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