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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Ford Window Winder Handles

Some ‘pimpier’ window winder handles for my van…
knoba - Ford Window Winder Handles

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Mostly made from 6 series aluminium.
knoba - Ford Window Winder Handles

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Machined, hardened & tempered home made broach for the splines…
knoba - Ford Window Winder Handles

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Original handle showing spline profiles.
knoba - Ford Window Winder Handles

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knoba - Ford Window Winder Handles

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knoba – Ford Window Winder Handles – 2016.dxf (link below)
knoba - Ford Window Winder Handles

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skf – 5201 Double row angular contact ball bearings

knoba – Ford Window Winder Handles – 2016.dxf

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Single bevel edge fishtail carving skew

Someone gave me this today (it’s a Marples & Sons 1/2″ bevel edge chisel)…
knoba - single bevel edge fishtail carving skew

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It’s in pretty poor shape…
knoba - single bevel edge fishtail carving skew

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The sole of the blade…
knoba - single bevel edge fishtail carving skew

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The top of the blade (the bevel edges can just be made out)…
knoba - single bevel edge fishtail carving skew

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Here it is again after a couple of hours reworking…
knoba - single bevel edge fishtail carving skew

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The blade has been: extracted, reforged, re-shaped, ground, hardened, tempered, lapped, polished & stropped.
knoba - single bevel edge fishtail carving skew

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The handle has been: re-turned, sanded, waxed & polished.
knoba - single bevel edge fishtail carving skew

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A sweet tool…
knoba - single bevel edge fishtail carving skew

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Optical centre punch

View of the CAD file & assembled materials (brass, medium carbon steel & acrylic)…
knoba - optical centre punch

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All machined to stated dimensions.
knoba - optical centre punch

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Loupes’ internal bore has been reamed.
knoba - optical centre punch

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Polished rings at ends and grained through body for finish & finger grip.
knoba - optical centre punch

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Recess for rubber ‘o-ring’ to stop the loupe slipping out of position.
knoba - optical centre punch

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Centre punch is being soaked (the punch is at the front & the bits at the back are for another project).
knoba - optical centre punch

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Punch is going to be quenched in old engine oil.
knoba - optical centre punch

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View through loupes’ optic.
knoba - optical centre punch

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CAD drawing below is for another project and the reason I wanted to make this tool.
knoba - optical centre punch

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O-ring fitted and held in place with epoxy glue.
knoba - optical centre punch

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Tool needs a case to protect the optic and keep the tool together.
knoba - optical centre punch

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Looking forward to using it for the next project…
knoba - optical centre punch

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knoba - optical centre punch

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Cross-hairs were scored on the lathe and highlighted with a blue sharpie pen.
knoba - optical centre punch

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knoba - optical centre punch

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knoba – Optical Centre Punch – 2015.dxf (link below)
knoba - optical centre punch

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knoba – Optical Centre Punch – 2015.dxf (updated)

With thanks to “PJ’s” at PJ’s – Home

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Head knives

Head knives for cutting & skiving leatherwork.
knoba - head knives

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Made from spalted silver birch, brass & medium carbon steel alloy, mirror polished with beeswax finish.
knoba - head knives

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Donor steel from old saw blade (old non tct blade). Took 2 teeth off to see if the metal could be hardened.
knoba - head knives

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Heated both teeth to cherry for 3 min, quenched one & left other to cool.
knoba - head knives

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My quenching bucket. Spark tests (grinding) on the 2 teeth gave good results.
knoba - head knives

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Cleaned up both sides with abrasives (flap wheels, silicon carbide discs, etc.).
knoba - head knives

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Stuck my templates to the blade…
knoba - head knives

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Cut them out with angle grinder.
knoba - head knives

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Centre marked a sharpening pivot point…
knoba - head knives

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Drilled that mark…
knoba - head knives

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Took off paper & made a sharpening jig for the belt sander.
knoba - head knives

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That’s how this is going to go…
knoba - head knives

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Sharpened & polished.
knoba - head knives

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Heated to cherry for 3 mins (12mm = 30mins soak time). Had to keep the torch moving to keep the blade hot over its entire surface.
knoba - head knives

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After quenching the blade but not the tang.
knoba - head knives

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Re-polished.
knoba - head knives

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Seasoned birch from my garden…
knoba - head knives

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Turned some handles for my blades…
knoba - head knives

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With thanks to Cap’n Eddie Castelin for his superb wood turning videos (link below).
knoba - head knives

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knoba - head knives

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knoba - head knives

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Machined up some brass ferrules and epoxied on.
knoba - head knives

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Tangs were tapered (4° included angle) to common machine taper specs (see link below)
knoba - head knives

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Very pleased with results, they feel great, strop well and hold a good wire!
knoba - head knives

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knoba – Leather Head Knives – xcf files – 2015.zip (link below)
knoba - head knives

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knoba – Leather Head Knives – xcf files – 2015.zip (link below)
knoba - head knives

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You tube – Cap’n Eddie Castelin

knoba – Leather Head Knives – xcf files – 2015.zip

Wiki – Machine taper

Wood Database – Silver birch

Colron – Refined Finishing Wax

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