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I bought me an electric jigsaw machine. It was second hand and I had to buy special jigsaws for it. These where not cheap to buy. Just a few for almost 10 euro. For my handsaw I got for that price almost 100 piece and they are also smaller and not so big. So more accurate. The jigsaws for the machine have a pin in the ends to hold it in the machine. After thinking for a solution I had an idea. I bought 10 tubes (lenght 16 mm) with M4 internal thread and 20 pieces of M4 bolts (lenght 12 mm).
nl.aliexpress.com
nl.aliexpress.com
I drilled in 6 tubes a hole of 1 mm. and in 4 tubes 1,2 mm for the little bigger jigsaw blades. The pictures below speak on the own.
The original jigsaw blade

the cheap hand jigsaw blades

The solution



Works perfect and because of the many tooth per inch of the blade the cut is perfect, looks like sanded.

4.94US $ 30% OFF|10Pcs Rvs Schroefdraad Mouwen Schroef Rob Tube 5Mm Diameter 9/13/16/20Mm lange Met M4 Interne Draad Onderdeel| | - AliExpress
Smarter Shopping, Better Living! Aliexpress.com

0.57US $ 35% OFF|5 50Pcs M1.6 M2 M2.5 M3 M4 M5 M6 M8 DIN912 Rvs 304 Hex Socket Cap Hoofd schroef Of Grade 12.9 Staal Metrische Allen Schroeven|Schroeven| - AliExpress
Smarter Shopping, Better Living! Aliexpress.com
I drilled in 6 tubes a hole of 1 mm. and in 4 tubes 1,2 mm for the little bigger jigsaw blades. The pictures below speak on the own.
The original jigsaw blade

the cheap hand jigsaw blades

The solution



Works perfect and because of the many tooth per inch of the blade the cut is perfect, looks like sanded.