Tool tang drill bit

Almost any steel will do. 7mm o/d, 2 straight flutes, 1/4″ increment depth marks
knoba - Tool tang drill bit

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Used in lathe, with new handles. Enlarge to fit individuals tangs…
knoba - Tool tang drill bit

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4° included taper (as per machine taper)
knoba - Tool tang drill bit

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Can easily remove shank for re-tempering. Link to CAD file below
knoba - Tool tang drill bit

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Wiki – Machine taper

knoba – Tool Tang Drill Bit – 2017.dxf

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Jewellers bench plate

Plate is 5mm x 200mm, spot welded clamp bracket is 2.2mm, mild steel.
knoba - jewellers bench plate - 01

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Clamp is 6mm x 25mm, m8 threaded bar, turned piece on end
knoba - jewellers bench plate - 02

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Finish is sulphuric acid pickling & satin black cellulose
knoba - jewellers bench plate - 03

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Good stability, very solid.
knoba - jewellers bench plate - 04

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knoba – Jewellers Bench – 2016.dxf (CAD file link below)
knoba - jewellers bench plate

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knoba – Jewellers Bench – 2016.dxf

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Bumping file

Bumping file for car bodywork, made from old straight file
knoba - bumping file - 01

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Double ended with reversible “plasti-dip” handle.
knoba - bumping file - 02

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Smoothed section in centre for index finger.
knoba - bumping file - 03

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Plasti-dip.com

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Nogging master for arched wood roofs

Component parts overview…
knoba - Nogging master - 01

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2″ by 2″ softwood, M8 coachbolts.
knoba - Nogging master - 02

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Assembled.
knoba - Nogging master - 03

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Folds up.
knoba - Nogging master - 04

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Machined a nice thumb nut for it from aluminium.
knoba - Nogging master - 05

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Nogging master measuring dwang geometry…
knoba - Nogging master - 06

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Place on timber (3″ x 2″ here), mark & cut!
knoba - Nogging master - 07

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knoba - Nogging master - 08

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Notes.
• Perlins can be continuous or split form.
• Saves time.
• Eliminates waste, cost & mistakes.
• Inexpensive & easy to make.

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*** Mk2 incorporates the “Plate Pilot” for accurate ‘birds mouths’ on the wall plate / 1st perlins nogging.

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Leather strap cutter

For cutting stiff leathers into parallel strips (belts, straps,etc.)…
knoba - Leather strap cutter

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Mostly made from Iroko & stainless steel.
knoba - Leather strap cutter

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knoba - Leather strap cutter

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knoba - Leather strap cutter

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knoba - Leather strap cutter

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knoba - Leather strap cutter

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knoba – Leather strap cutter – 2015.dxf (link below)
knoba - Leather strap cutter

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knoba – Leather strap cutter – 2015.dxf

knoba – Adjustable Dowel Jig

Wood Database – Iroko

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Knurling copier & profiler

Single wheel knurler; mild steel, high tensile steel, stainless steel & brass.
knoba - knurling copier & profiler

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Filed, drilled, reamed & bevelled. Captivated dowels & countersunk bolts.
knoba - knurling copier & profiler

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Lever stops the sacrificial nut & bolt from elongating the body…
knoba - knurling copier & profiler

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knoba - knurling copier & profiler

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Used on a tool post, near the tailstock off a live centre, profiles, formers & patterns can be made from silver steel…
knoba - knurling copier & profiler

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knoba – Knurling Copier & Profiler – 2015.dxf (link below)
knoba - knurling copier & profiler

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knoba – Knurling Copier & Profiler – 2015.dxf

West Yorkshire Steel – Silver steel.pdf

Ebay.co.uk – Stainless Steel Dowel 3x12mm

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Lathe chuck spider

Magnetic lathe chuck spider provides reference face for repeat cuts.
knoba - lathe chuck spider

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Another one for my 4 jaw chuck (material is 5083 aluminium 15mm thick & 3mm x 3mm neodymium magnets).
knoba - lathe chuck spider

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The spider also helps with work-holding when turning small parts.
knoba - lathe chuck spider

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knoba – Lathe chuck spider – 2015.dxf (link below)
knoba - lathe chuck spider

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knoba – Lathe chuck spider – 2015.dxf

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