Making a adaptor for my bench grinder

  1. Sam0117 Member

    Messages:
    20
    Location:
    Netherton
    Hey guys thought I’d share this with you guys.

    So for Xmas I asked for a scotch bright wheel for my bench grinder to do some light polishing and buffing to clean parts before welding, and my amazing wife got me one but.....it’s too damn wide to fit on the spindle, so I thought I’m not gonna waste it so I came up with a plan.

    I found some scrap material to use as a bush for the wheel which has a 20mm bore and my spindle is 12mm, but the bore on the material is way to big so my plan is to drill an tap M12 a 14mm cap head (shank only) to then insert into the bushing to clamp the wheel in place, I’ll weld it to the bushing an also weld two washers on to spread the clamping onto the wheel, I also put a small piece of 15mm copper in the other end to help minimise the slip at the other end.

    Now I don’t have any fancy machines to help me make this other than my tig welder so I’ve had to use all hand tools to make this, how I didn’t snap the tap in the cap head I’ll never know just took my time and finally got there. Hoping to have this welded by the weekend so I’ll show the final result once I’m done.
     
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    indy4x, jsf55, decca and 9 others like this.
  2. Dr.Al

    Dr.Al Forum Supporter

    Messages:
    684
    Location:
    Gloucestershire, UK
    That's an ingenious solution to the issue and impressive that you made it all with hand tools.
     
    Sam0117 likes this.
  3. Munkul

    Munkul Jack of many trades, Master of none

    Messages:
    2,632
    Location:
    Cumbria
    That's a really nice solution!
     
    Sam0117 likes this.
  4. Sam0117 Member

    Messages:
    20
    Location:
    Netherton
    thanks @Dr.Al, yeah I thought it would take me several attempts at drilling and tapping the cap head as the drill I used was an sds drill with a chuck attachment lol the wobble helped with my 10mm drill making a slightly bigger hole for tapping as it’s ment to be 10.2mm drill but I don’t have one lol shows what you can do with abit of patience
     
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  5. Munkul

    Munkul Jack of many trades, Master of none

    Messages:
    2,632
    Location:
    Cumbria
    Was the caphead not really hard? Usually capheads are grade 10.2 or higher.
     
  6. Sam0117 Member

    Messages:
    20
    Location:
    Netherton
    yes it was hard, 12.9 stamped on the head
     
  7. Sam0117 Member

    Messages:
    20
    Location:
    Netherton
    Finally got round to welding this up today.

    I decided that tacking the cap head an bush while clamped on the shaft was my best bet in getting it concentric, I also drilled a few holes to help hold the cap head in even though it properly didn’t need it, I know my welding isn’t the best but haven’t had a lot of practises but I’m gonna get there.

    I cleaned the washers off with a wire wheel but was still getting crap flare up the tungsten so mental note for next time would be to use the belt sander to get all the plating off, wire wheel it all clean and tried it on, it’s done the job and deffo usable but the welding has pulled abit so it’s got a slight wobble when it’s spinning but when I bolt the bench grinder down it’s hardly noticeable. So all in all I’m happy with it, maybe in the future if I ever get a lathe I’ll make a proper solid adaptor.
     
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    jsf55, Dr.Al and barking mat like this.
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