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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Ford transit mt75 gearbox quickchange

Original gear lever assembly
knoba - transit mt75 gearbox quickchange

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knoba - transit mt75 gearbox quickchange

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knoba - transit mt75 gearbox quickchange

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knoba - transit mt75 gearbox quickchange

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Pin and spherical part (some chrome alloy) may have been brazed
knoba - transit mt75 gearbox quickchange

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Welded & machined assembly adds an extra 20mm to the selector end
knoba - transit mt75 gearbox quickchange

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knoba - transit mt75 gearbox quickchange

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knoba - transit mt75 gearbox quickchange

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Gearbox housing spacer cast and machined from aluminium
knoba - transit mt75 gearbox quickchange

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knoba - transit mt75 gearbox quickchange

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Completed assembly reduces top-end throws from 6″, to 4″ ~ 33% reduction.
knoba - transit mt75 gearbox quickchange

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knoba – metal casting furnace

knoba – ball turning fixture for lathe

Wiki – Lever

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Emery roll dispenser

Made out of scraps around the workshop: 4mm & 6mm plywood, 10x26mm pine, 4mm rosewood dowels, stainless steel sheet, mild steel pins, nylon 66, brass rivets with a linseed oil finish…
knoba - Emery roll dispenser

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A little flourish around the hinge area…
knoba - Emery roll dispenser

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Nylon feed rollers.
knoba - Emery roll dispenser

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Sprung cams trap the emery, but allow it to be pulled out easily
knoba - Emery roll dispenser

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Lids are hinged for refills…
knoba - Emery roll dispenser

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Now fitted with the added possibility of a tea shelf…
knoba - Emery roll dispenser

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knoba – Emery Roll Dispenser – 2015.dxf (link below)
knoba - Emery roll dispenser

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knoba – Emery Roll Dispenser – 2015.dxf

knoba – Folding bar

WorkShopShed – Home site

Homemadetools.net – Online tool maker community

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Bench grinder station

New bench grinder station

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New bench grinder station

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New bench grinder station

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Diamond wheel…
New bench grinder station

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Record – RSBG8 8″ Bench Grinder with 40mm Whitestone

Draper – 200 x 19mm Crimped Steel Wire Brush

Tooled-up.com – Zenith Taper Spindle Left Hand 16mm

Vertex – Quartz Hanlogen Lamp VHL-20FT

Parker Steel – Black Carbon Steel Flats

Hammerite – Direct to Rust Metal Paint

3M – Convolute Deburring Wheels

Ebay – AIM Tools – 150x35x32x5x3mm Diamond Grinding Flat Conical Wheel

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