; Duplex Nibbler: sourcing replacement blades

[RainbowsParticipant @rainbows]

Ya boi went and obtained some Duplex nibblers and while they in the post I'm trying to find new blades for them. Description is that the tools are fine except the blades have worn down to nothing.

Looking on the internet I can't find much as far as Duplex specific blades. One shop in america does them but not for my model N3H.

Anyone have a spare pair knocking about? If not then once the nibblers arrive this can become a "how to make nibbler blades" thread

[RainbowsParticipant @rainbows]

[not done it yetParticipant @notdoneityet]

Have you not enquired to the suppliers? Seems the sensible place to start.

[RainbowsParticipant @rainbows]

Local idiot completely strips down nibbler to take blade off, at the end realised blades screws out without needing any other disassembly

Machine is a bit confusing: all the body bolts are metric hex key sizes but the ones that keep the die on are between my 2 and 2.5mm keys so I need to hunt down where my imperial allen key set went. Guess the product line spanned metric-fication and the kept the punch and die imperial for interchangeability

In case anyone in the far future gets a machine and has the urge to make their own blade I will make a sketch for posterity, along with a text description cause you see a lot of dead images on old forum posts.

Looking at it the shank is 9.45mm diameter and 28.5mm long with 20mm of that being threaded. The thread OD is 9.29mm, pitch eyeballs in at 1.5mm. Take that 9.45mm to 9.525mm and that 1.5mm to 1.27mm then you get a 3/8" BSF thread.

The blade section is 55.44mm at its longest but would ideally be 58mm on account of this blade is too short from sharpening. Depending where I measure it is 2.3 to 2.4mm thick (worn vs unworn section?) and 7.85 wide.

Annoying while symmetrical along its wide axis in thickness its been offset in its other axis so I need to figure out a good way to measure that.

Once I get access to a CAD capable laptop I will make a quick sketch.

For my own particular machine Im just gonna shim the blade down by sticking washers into the threaded hole or something now that I've sharpened the mangled blades at the cost of them being too short.

[Howard LewisParticipant @howardlewis46836]

Don't know the machine, (My cheapie nibbler uses round blades, about 3mm diameter).

If all else fails, could you not reverse engineer a blade from some 3/8 Silver steel, followed by harden and temper the cutting end? Then you are able to ensure a non stop supply of blades!

Howard

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