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Paul Wightman

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Everything posted by Paul Wightman

  1. spooky! a freind of myne has a mate who burns luton bodies as well hes got loads in a barn im shure he wud let you have some some of the sheets are reel big like the side of a luton van body you want ill get you his phone number hes in fife
  2. But is it the correct grade? Mil-T-4130, Mil-S-4130, 15CDV6 (1.7734) and 25CRMO4...............15CDV6 and 25CRMO4.................. What state is it supplied in? Normalization Process annealing, also called "intermediate annealing", "subcritical annealing", or "in-process annealing", is a heat treatment cycle that restores some of the ductility to a work piece allowing it be worked further without breaking. Ductility is important in shaping and creating a more refined piece of work through processes such as rolling, drawing, forging, spinning, extruding and heading. The piece is heated to a temperature typically below the austenizing temperature, and held there long enough to relieve stresses in the metal. The piece is finally cooled slowly to room temperature. It is then ready again for additional cold working. This can also be used to ensure there is reduced risk of distortion of the work piece during machining, welding, or further heat treatment cycles. The temperature range for process annealing ranges from 500 °F to 1400 °F, depending on the alloy in question. Annealing A full anneal typically results in the second most ductile state a metal can assume for metal alloy. It creates an entirely new homogeneous and uniform structure with good dynamic properties. To perform a full anneal, a metal is heated to its annealing point (about 50°C above the austenic temperature as graph shows) and held for sufficient time to allow the material to fully austenitize, to form austenite or austenite-cementite grain structure. The material is then allowed to cool slowly so that the equilibrium microstructure is obtained. In some cases this means the material is allowed to air cool. In other cases the material is allowed to furnace cool. The details of the process depend on the type of metal and the precise alloy involved. In any case the result is a more ductile material that has greater stretch ratio and reduction of area properties but a lower yield strength and a lower tensile strength. This process is also called LP annealing for lamellar pearlite in the steel industry as opposed to a process anneal which does not specify a microstructure and only has the goal of softening the material. Often material that is annealed will be machined and then be followed by further heat treatment to obtain the final desired properties. Is you oven big enough?
  3. Smo, did you source some angle in the end?
  4. 80 x 40 x 6 is not a 'standard ' size. 80 x 60 x 6 is, will that do?
  5. The Mrs likes running and fun at sites then?
  6. Love to Charles but I'm having my hair done.
  7. What, wind the screw really slowly? Sorry, couldn't resist!
  8. I see he does vehicle preparation as well, anybody used him?
  9. Hi Mark, are you looking to make a set for the challenge if it and for your own use? Or are you looking to produce in quantity to sell? If this is the case can I suggest you do the R&D / development rather than do a 'Sco*****n'
  10. Skinny discs work perfectly. Use tallow on the disc to stop clogging.
  11. You should have THIS ONE Yuo could get away with THIS ONE At a push you could even use THIS ONE with a little care and practice. It's all down to money. I survived for years with the cheapest type and if it's used on copper pipe they work fine. I now have one of the expensive ones which is fab and does a perfect job every time. I think you would probably do best with the mid range model as a compromise. I'm sure an expert will be along soon!
  12. I apologise for Image-Cave , seems they want me to pay! Images should be available tonight.
  13. Nick seems to have made you all a little moist at the prospect of building a new vehicle in one week. Well, for the record I said it could not be done and have now been proved right! He's been at it 8 days now......................... To be fair it only needs it's back wheels fitting, the bonnet sorting and some stickers. Should be ready for Sunday.
  14. As Chris says, if you want to do something dodgy with electrics it's best to make it 'hideable' so as to avoid embarrassment when visited by an expert! So long as you use the correct size and type of cable, each outlet has an isolator and correct fusing is applied you will probably live Why not have a ring main or more correctly for individual machines a fused, isolated supply from your distribution board? Once again, is this the best place to ask?
  15. Sorry to correct you Ali but if a Ltd company goes down owing monies to inland revenue or customs and excise and the directors have not been found to be fraudulent there is no come-back in later life.
  16. So long as the failed crimp joints were crimped correctly in the first then soldering was the solution. Obviously there is no definitive answer so do what feels good!
  17. How many wire connections are soldered in automotive wiring looms? The ideal is a crimped connector with support from insulation in the form of heat shrink, terminal insulator or rubber boot. The crimp internal diameter reduction onto the conductor is gradual, ie a radius. Solder provides an instant transition from solid (solder) to conductor (cable) which is a stress point under vibration and movement. This stress can be reduced on a solder joint with insulation and/or mechanical support. As far as conductivity is concerned a correctly crimped connector will perform as well as a soldered joint. Other views:- HERE HERE HERE
  18. So true Tony, I suppose it's a fact of life but for those who DO know it's frustrating. If I find I can fit each wheel on my vehicle with only two wheel nuts does that make it OK? Who is qualified to say I need 5? I would advise the original poster to search the internet for a second opinion.
  19. Once again the forum does a cracking job A question is asked. An answer is given. A contradictory answer is given. The original asker is none the wiser! When will people who don't KNOW resist the temptation to guess.
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