|The use of
self-tapping inserts has
significant advantages over pre-tapped
holes, moulded-in inserts and wire thread
inserts. They eliminate close tolerance
holes required for tapping directly into the
base material, damaged tools and low
productivity resulting from moulded-in
inserts and the time consuming process of
placing wire thread inserts into pre-tapped
|For a work-piece made of a
light alloy, this diagram illustrates
clearly that whilst correct hole sizes are
important for product reliability, the
insert achieves almost maximum pull-out with
only 30% external thread interference.
In light alloy, the self-tapping steel
insert resists a pullout force in excess of
the yield point of an 8.8 grade bolt.
Self-tapping with cutting slot.
Application: This is a self-tapping insert
for the creation of wear-free, vibration resistant
screw joints with high load capacity in materials
with low shearing strength.
Installation: Self-tapping using a
hand tool or reversible drive mechanism
Material: Steel - case hardened zinc plated