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The driving tangs of helicoil inserts should be removed to eliminate
their interference with the end of the assembled bolt. Their removal
provides greater latitude in the depth location of the bolt. Manual tang
break-off tools are available for use with inserts up through 18mm /
3/4" nominal diameter. Auto /spring loaded tang break-off tools are
available for use with inserts up through 12mm / 1/2" nominal diameter.
The operation of auto tang break-off tools is automatic, having a spring
loaded, easily triggered punch that strikes a sharp, uniform blow
against the tang of the installed insert. It can be operated with one
hand. For larger sizes use long nosed pliers. Bend tang up and down to
snap off at notch. Tools to remove helicoil inserts are available for
ranges M1. 6, M2 – M2. 2, 2. 5 - 4. 5mm, 3 - 8,. 5 - 10mm, 10 - 3/8", 11
- 24mm, 7/16" - 1", 27 - 39mm, 1-1/8" - 1-1/2". Extraction is done by
applying the tool to the insert, striking the head of the tool a light
blow and turning it counterclockwise, maintaining steady downward
pressure. |
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