FASTENERS & FIXINGS
THE HUCK BOBTAIL
®
STAR FASTENERS
A HUCK ® FASTENER THAT HAS IT ALL!
The Huck BobTail® - small diameter 6.4mm to large 25mm permanent structural Lockbolt
Lockbolts as an alternative to welding? Manufacturers of
heavy equipment are actively investing in direct tension
lockbolts. Installing a Bobtail fastener is significantly faster,
stronger and safer than welding a joint. Let’s find out more…
BOBTAIL CONSISTS OF TWO PIECES,
CALLED PIN AND COLLAR
• The pin has rolled annular lock grooves (shallower than
helical threads) with two pull grooves
• The collar material is softer than the pin, with no initial
grooves
THE INSTALLATION PROCESS - HOW IT
WORKS
• The pin is simply inserted into the prepared hole
• The collar can be pre-spun onto the pin by hand if pre-
assembly is required
• When the installation tool is applied and activated, the
tool swages the collar onto the pin resulting in high clamp
forces
• This force deforms the collar material into lock grooves on
the pin
• The force generated by the tool locks the collar into place;
this will not loosen
Installed Huck
BobTail Lockbolts
NO PIN BREAK
•
•
•
•
Eliminates waste
Ensures high corrosion resistance
Eliminates pintail slip hazards
Greatly reduces shock load to installation tool, thereby
extending tool life
SAFE, ERGONOMIC INSTALLATION
• No torque or impact is transferred to the operator
• Tooling is light and easy to handle
• Its quiet to install – under 70 Db
PROVEN PERFORMANCE
• Fastens without torque – delivers high, consistent clamp
loads
• Maintenance free joints – no retorquing required
• Provides high vibration resistance – delivers joints that will
not loosen
• High fatigue endurance
• Installs only two seconds
• Visual inspection is all that is required; digital tooling can
also be used to record results
• The design of the fastener and tooling allows it to be
installed in confined areas
• Creates tamperproof joints
106
PECM Issue 35
BobTail Lockbolted Trailer
chassis construction