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  1. Voyager687

    Cleaning Aluminum

    I weld stuff like this regularly, so here's the trick to good aluminum welds. 1) If your parts are shiny, not dull,they don't need brushing because they're not oxidized. 2) Brush marks usually look really bad after anodizing because the color makes them stand out. 3) Almost any solvent...
  2. Voyager687

    Vacuum stress relieving tool steel

    I need to stress relieve some CPM4 die inserts prior to hardcoating. Vacuum stress relieving eliminates the oxidised layer which has to be polished off before hardcoat is applied, but I can't find a local heat treater offering this service and need very quick turn around time. My question is...
  3. Voyager687

    X220CrVMo 13-4 weldability

    I've been told that the tool steel (DIN)designated X220CrVMo 13-4 is the same as AISI D-7 and that welding in the hardened state(57 Rc) is extremely difficult. Can anyone tell me if the mat'l. cross reference is correct and is the material weldable. Alan L. Bass, toolmaker
  4. Voyager687

    Wheels for DuMore toolpost grinder

    I'm currently grinding the tool steel CPM-4(Rc 62-64) using a DuMore #57 toolpost grinder and am having no success at all. Norton SG wheels (46G or 46H) work great on this material but I can't find anyone who sells an SG type(ceramic/alumina blend)wheel in a suitable size. This application needs...
  5. Voyager687

    Carbide bur forms

    Can anyone tell me of a supplier of carbibe burs that have the following characteristics: 1) 1/8" shank diameter 2) Single cut 3) Flutes can be either straight or low helix 4) I need both 60 deg. incl. angle and 30 deg incl. angle 5) Flutes must terminate in a sharp point or at least with a...
  6. Voyager687

    Belt sander grinding belt wears off quickly

    Many people make the mistake of thinking that one sanding belt is about like any other...and they are not. Sanders from overseas(typically China,Taiwan,Korea,etc.) usually come equipped with very low cost,low quality belts.Domestic mfrs. are about the same. The belt material, abrasive grain...
  7. Voyager687

    Surface grinding tool steels

    I often grind a hardened tool steel designated CPM-4, can someone please tell me what grit, bond etc. is best with a 1.5 X 12" wheel.

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