Workshop extractor

Intake side. Made from aluminium.
knoba - Workshop extractor

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Exhaust side. Enclosure made from 304 stainless steel, plywood & galv weldmesh.
knoba - Workshop extractor

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240v Torin Sifan extractor, centrifugal fan. Fabricated wall interface.
knoba - Workshop extractor

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3 developments. Mallet formed. Pop riveted & silicon seams. Cad file below.
knoba - Workshop extractor

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Removable grill made from plywood & weldmesh.
knoba - Workshop extractor

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Hardwood former (1st) used for hammer forming intake cowling
knoba - Workshop extractor

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Hardwood former (2nd) used for hammer forming intake cowling
knoba - Workshop extractor

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Hardwood former (3rd) used for hammer forming intake cowling
knoba - Workshop extractor

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First phase complete. To do: trim edges & fold over returns…
knoba - Workshop extractor

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Softwood former (4th) used for hammer forming edges of intake cowling
knoba - Workshop extractor

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Needed to make a tucking fork for this operation
knoba - Workshop extractor

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Front side.
knoba - Workshop extractor

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Back side.
knoba - Workshop extractor

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Power. Extractor is quiet & very powerful.
knoba - Workshop extractor

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Materials:
(FAN)
1 x Extractor fan
1 x Wall interface plate (1.5mm galvanised sheet)
1/8" pop rivets
Rawlplugs
6 x 12x2" stainless steel self tapers
6 x m8 stainless steel washers

(ENCLOSURE)
1 x 4'x4'x1.0mm 304 stainless steel sheet
1/8" pop rivets
Silicone sealant
1/2" closed cell foam sound insulation
High temp spray glue
10mm mild steel bar
2 x m6 stainless steel button cap bolts
2 x m6 stainless steel washers
Plywood
Weldmesh

(INTAKE)
2.0mm 6 series aluminium sheet
Grab adhesive

(ELECTRICAL)
240v metal clad switched outlet with light (5Amp fuse)
Metal clad surface mount backbox
22mm (7/8") through hole rubber grommets
1.0mm twin & earth cable
Rawl plugs
Screws
Earth sleeving
Trunking
Cable ties

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Torin-sifan – Ddn200-180a Extractor

Sassda – Stainless Steel

Rivetwise – Pop (blind) rivets

MK Electric – Commercial / domestic

Thor – Hammers & mallets

knoba – workshop extractor – 2017.dxf

knoba – Metalwork mallets

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http://www.homemadetools.net

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Chop saw mitre framing jig

Easy to make (ply & baton) checks accuracy of chopsaw 90° cut
knoba - Chop saw mitre framing jig

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1 joint 1 cut, or, 2 joints 1 cut…
knoba - Chop saw mitre framing jig

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Perfect.
knoba - Chop saw mitre framing jig

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Link to CAD file below
knoba - Chop saw mitre framing jig

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knoba – Chop Saw Mitre Framing Jig – 2017.dxf

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Ac Power Supply

Aluminium frame pattern for recycled multitap transformer
knoba - Ac Power Supply

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Transformer core shaping buck
knoba - Ac Power Supply

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Frame made
knoba - Ac Power Supply

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knoba - Ac Power Supply

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Donor psu…
knoba - Ac Power Supply

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Ac system internals in
knoba - Ac Power Supply

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240vac @ 50Hz in: 1, 3, 6, 9 & 12vac @ 50Hz out
knoba - Ac Power Supply

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Illuminated the meter.
knoba - Ac Power Supply

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New laminated fascia (cad file below)
knoba - Ac Power Supply

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New laminated meter scale (cad file below)
knoba - Ac Power Supply

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Schematics (Fritzing file below)
knoba - Ac Power Supply

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knoba – Ac Power Supply – Fascia – 2016.dxf

knoba – Ac Power Supply – Meter Scale – 2016.dxf

knoba – Ac Power Supply – Schematic – 2016.fzz

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Test lead rack

Copper, brass, stainless, aluminium. It rotates.
knoba - Test Lead Rack

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Aluminium top tray & forming buck
knoba - Test Lead Rack

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Buck formed. Aluminium top tray formed
knoba - Test Lead Rack

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Brass upper rack and shaping forms
knoba - Test Lead Rack

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Complete assembly
knoba - Test Lead Rack

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Machined & beaten copper bolt, tray, turned copper spacer
knoba - Test Lead Rack

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Drive screws, machined & shaped brass rack piece
knoba - Test Lead Rack

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Machined aluminium wheel, copper spiky things, brass & stainless tynes, copper nut, m6 grub screw
knoba - Test Lead Rack

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Copper spiky things
knoba - Test Lead Rack

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Assembled
knoba - Test Lead Rack

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Upside down
knoba - Test Lead Rack

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Fitted to my electronics bench
knoba - Test Lead Rack

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Sumptuously disposed with test leads
knoba - Test Lead Rack

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Tray carrying nik-naks & bits
knoba - Test Lead Rack

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Cad file below
knoba - Test Lead Rack

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knoba – Test Lead Rack – 2016.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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Hand graver

Hand graver for engraving metal.

Iroko handle, cast & machined brass body, 1/8″ hss lathe tool, m4 grub screws.
knoba - hand graver - 01

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Handle is flat on one side to allow the tool a low attack angle.
knoba - hand graver - 02

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knoba – Hand graver – 2016.dxf (CAD file link below)
knoba - hand graver - 02

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knoba – Hand graver – 2016.dxf

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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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