From: djb@invalid.com   
      
   On 08/12/2025 20:15, Bob La Londe wrote:   
   > On 12/8/2025 6:21 AM, Jim Wilkins wrote:   
   >> This rule would be a severe restriction for me. I've cut pulley   
   >> grooves for vee belts, steel cable and serpentine belts, all of which   
   >> violate it.   
   >> https://3dplatform.com/blogs/blog/printing-overhangs-beyond-45-degrees   
   >>   
   >   
   > There are other forms of 3D printing where it might not be an issue.   
   > Filamant and resin to my meager knowledge level might not be suitable,   
   > but laser sintered metal powder might just do the trick.  A truly   
   > capable machine would no doubt be beyond the budget of most of us here   
   > in this group, well except for our rich mining magnate from the UK   
   > (GRIN), but it can probably do that kind of work.   
   >   
   > I'd have to ask my son about resin printing.  I can think of some   
   > strategies where it might work.   
   >   
   >   
   >   
   A mate has had a thermostat housing for his car engine commercially 3D   
   printed here in the UK and wants to get a metal print of another item   
   but too expensive here, Hong Kong is a possibility he said as prices are   
   much lower. the housing has been in use over a year without issue as I   
   understand it.   
      
   The one he has had done is nylon base material IIRC and is a powder bed   
   process where a layer of powder is spread and then that has a binder   
   sprayed on the area requiring bonding and then it's UV cured IIRC.   
   Overhang not a problem as the powder provides support. Not low end   
   currently AFAIK but these things creep downwards.   
      
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