Via punches

Machined punches for brass through hole rivets
knoba - via punches

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Copper tracks had lifted, component had disintegrated, good repair, will use again!
knoba - via punches

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Materials:
2 x 75x6 mm (3"x1/4") circular solid section stainless steel

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Chainsaw horse

Made from recycled wooden pallets, folds flat.
knoba - chainsaw horse

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What’s in the CAD file…
knoba - chainsaw horse

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Materials:
3 x wood fork lift pallets;
12 x 115x92x16mm
8 x 114x70x16mm
24 x 2 1/2"x10 stainless wood screws
3 x m10x80mm stainless coach bolts
3 x m10 bzp nyloc nuts
6 x m10 stainless penny washers

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knoba – chain saw horse – 2018.dxf

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Steel thumbscrews & jig

What I’m making: M8 wingbolt
knoba - Steel thumbscrews & jig

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Made these tabs to weld onto bolt heads (details in CAD file below)
knoba - Steel thumbscrews & jig

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Replacing these plastic ones (some have broken)
knoba - Steel thumbscrews & jig

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Stock used in making a welding & alignment jig (to help make the wingbolts)
knoba - Steel thumbscrews & jig

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Materials:
1 x 50x50x6 mm (2"x2"x1/4") flat section mild steel
2 x 50x25x3 mm (2"x1"x1/8") equal angle mild steel
1 x 100x14 mm (4"x9/16") hex bar mild steel

All pickled, de-smutted & deburred.
Jig copes with 6mm to 8mm (1/4" to 5/16") bolts

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8mm hole in centre (top side)
knoba - Steel thumbscrews & jig

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Countersunk 90° included angle (underside)
knoba - Steel thumbscrews & jig

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Marked all & drilled (8mm) holes in uprights
knoba - Steel thumbscrews & jig

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Going to plug weld (MIG) through holes to base
knoba - Steel thumbscrews & jig

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Using a wingbolt tab, as a spacer, wrapped in masking tape to add some clearance
knoba - Steel thumbscrews & jig

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Welded
knoba - Steel thumbscrews & jig

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Dressed with angle grinder flapwheel
knoba - Steel thumbscrews & jig

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Marked and sliced through only the angle iron sections
knoba - Steel thumbscrews & jig

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Cleaned up
knoba - Steel thumbscrews & jig

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Nuts, bevelled, threaded & marked. From hex stock
knoba - Steel thumbscrews & jig

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90° included angle
knoba - Steel thumbscrews & jig

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Different threaded nuts
knoba - Steel thumbscrews & jig

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Nuts hold the bolts in good contact & alignment
knoba - Steel thumbscrews & jig

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Tabs are centre marked, drop in with good alignment, ready for welding
knoba - Steel thumbscrews & jig

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What’s in the CAD file
knoba - Steel thumbscrews & jig

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knoba – steel thumbscrews & jig – 2018.dxf

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Wired edge dollies

Thanks to billsmetal – youtube. Cut & pickled materials…
knoba - wired edge dollies

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How they will fit together
knoba - wired edge dollies

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Bevelled one edge for easier weld penetration
knoba - wired edge dollies

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Strong, flat heatsink (bench) & clamps to restrict distortion
knoba - wired edge dollies

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Gouged the rear of seam & welded to give homogeneous fusion
knoba - wired edge dollies

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Cleaned up with flap wheel & belt sander.
knoba - wired edge dollies

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Materials:
1 x 20x32x50mm mild steel, Rectangular solid section
1 x 25x38x50mm mild steel, Rectangular solid section
2 x 25x3x50mm mild steel, Flat section
2 x 50x6x50mm mild steel, Flat section

Normalise & harder alloy for upgrades.

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Spot weld tip shaper

Machined from 22mm o/d silver steel. Top side.
knoba - spot weld tip shaper

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Underside.
knoba - spot weld tip shaper

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Dremeled with diamond burrs.
knoba - spot weld tip shaper

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Held at cherry for 6 to 7 mins.
knoba - spot weld tip shaper

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The gauze, I was trialling, was only good for tempering.
knoba - spot weld tip shaper

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Quenched, here.
knoba - spot weld tip shaper

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Made to fit a thread die holder.
knoba - spot weld tip shaper

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Finished piece. Can be sharpened on either side of cutting edge.
knoba - spot weld tip shaper

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Link to CAD file below.
knoba - spot weld tip shaper

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knoba – spot weld tip shaper – 2018.dxf

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Lab tripod

Made from 304 stainless steel.
knoba - lab tripod

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knoba - lab tripod

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It disassembles when not required. The tig’ed nuts are clearance drilled.
knoba - lab tripod

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Silicon feet good to approx. 200°c.
knoba - lab tripod

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In action.
knoba - lab tripod

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CAD file link below.
knoba - lab tripod

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knoba – lab tripod – 2017.dxf

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240v Quick connect

Quick way to hook up stuff to test like; neon bulbs, DUT, etc.
knoba - 240v quick connect

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Standard mains 3 pin plug (UK).
knoba - 240v quick connect

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Access for fuse. Neon bulb, there. Wire gripers are epoxied on.
knoba - 240v quick connect

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Indicator light when unit is live. Entirely from recycle.
knoba - 240v quick connect

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