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Recent content by sbc

  1. sbc

    sacrificial anodes

    Zinc anodes are used to protect alu., iron, copper, & brass on boats in salt water. They come in MANY shapes & sizes. Many with threads for mounting. Everything needs to be grounded/bonded for proper protection. Good Luck!
  2. sbc

    Refueling fires Why?

    One thing that you don't need to be stupid to do is to fill a plastic fuel can that has been sliding around in a bed liner, without removing it from the truck. Bed liners now come with a warning, but what about when someone purchases a used truck?
  3. sbc

    Structural Rivet Removal

    'sounds like a gouging rig?
  4. sbc

    Cracked weld puzzler

    I agree with pre-heating and full welding as posted above, but it sounds as if these teeth may need to be replaced periodicly? One solution may be to roll mild steel to form a collar of sufficient width (say 7"), weld it to the pipe, then weld your 2.5" wide collars to it. You may need...
  5. sbc

    Simple pulley-system design question

    How 'bout a clothes line?
  6. sbc

    how to convert rotary motion to lin

    Any crank, cam, or ellipse will not yeild a consistent linear movement per. degree of rotation. A screw for this application would need a pitch of 51.42857142875... mm., an infinitive number.
  7. sbc

    how to convert rotary motion to lin

    Could you use a rack & pinion setup? If so then the pinion needs to have a pitch dia. of 8.1900mm.
  8. sbc

    350smbk th400

    The cross member, drive shaft, & rear gears need to be changed. The shifter cable & kickdown cables need to be slightly modified. The exaust hanger @ the cat will not fit but can be fudged. You'll need to find a vacuum sorce for the modulator. You may need to drill to mount the cross member...
  9. sbc

    Cold Start problems - Very odd!

    It could likely be the fuel pump relay if the pump only runs after cranking. 'Sounds like when you get oil presure you get fuel.
  10. sbc

    Practical determination of machinability

    viktor, There are hardness testing files or portable hardness testers which will tell you the hardness of a material & therefore it's machinability.
  11. sbc

    Magnetization

    In order to magnetize screw drivers I simply coil 12 gage wire down the length, then momentarily short the ends of the wire across a 12v automotive battery. You need DC to do this & the wire WILL get hot & melt if connected for too long. I mearly scratch it on the battery terminals.
  12. sbc

    cam for restrictor plate engine

    Try this site www.lazercams.com. They will want all of the relevant info, such as tire size, gear ratio, vehicle weight, etc...
  13. sbc

    Mechanical advantage from pulleys

    With gears or sprockets, simply count the teeth of each gear, then devide. A 10 tooth gear driving a 60 tooth gear wil have a ratio of 6:1. With pullys the pitch diameter must be found & used. If your assembly is not accessible, you can rotate the assy. and count the # of turns of the input...
  14. sbc

    Offset synchronisation

    I think that the term you are looking for is helix, ie. helical gear. The helical gear operates more quietly than a straight cut gear, but produces lateral forces or 'thrust'.
  15. sbc

    Hybrid Battery Life

    Anyone know what the life expectancy of the batterys in the new hybrid cars is? What kind of enviromental disaster will their disposal cause?
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