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Prismatic LiFePo4 Tap and Drill Alignment Jig
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Easily drill (6-7mm) into the blank terminal with the alignment jig and tap.
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Prismatic LiFePo4 Tap and Drill jig for cells without terminal connectors.
Easily drill (6-7mm) into the blank terminal with the alignment jig and tap.
The relieve in the side for the aluminium shavings sometimes gets clogged, but easily blown clean.
I printed it upside down with supports
Description
- I used a generic helicoil M6 kit [AliExpress] and managed to not kill any cells (did 17). I bought two packs of helicoils thinking I might waste a few, didn't waste a single one its actually really easy if you take it slow.
- Since having two kits, I took one drill bit and one tap, and cut them flush so I could really get the most out of the small space available.
- If you see or hit a bit of copper coming out of one terminal, this is okay, you have reached the maximum depth, I couldn't recommend going deeper as it might cause a thermal weak point.
- I cut one winding of the helicoil off, as it kept sitting just proud otherwise, requiring a little file down.
- I used a small flat screwdriver to break the helicoil tab by bending it side to side and fishing it out with tweezers.
- Using WD-40 really makes the tapping easier, but you would then need to clean it out with contact cleaner or isopropyl alcohol before inserting the helicoil.
I'm linking to an invaluable 3d model from another maker, a universal threading tool holder: