Helix Bolt & HelixBolt Plus

HelixBolt

Description

The HelixBolt and HelixBolt Plus are resin anchored bolts with improved resin mixing and support capacity for resin bolting applications.

The Helix style bolts have a unique head configuration designed for improved shredding of resin capsules, better centralising of the installed bolt and improved end anchoring. The augered paddle configuration improves resin mixing, reduces gloving, and minimises voids in the resin to maximise the anchoring strength of the bolt and enhance corrosion protection through centralisation of the bolt within the Resin. The patented design dramatically increases the range of resin annulus into which HelixBolts can be installed offering the ability to optimise the design of resin bolting systems.

The HelixBolt can be supplied in Ø18 mm or Ø20 mm bar depending on requirements. The proximal end of the bolt is threaded with a washer, spherical seat, nut and shear pin. The shear pin facilitates spinning prior to pre-loading. The pin shears at a predefined torque to allow the HelixBolt and HelixBolt Plus to be preloaded. Each unit can be provided with a collapsible load indicator to confirm correct tensioning of the unit when installed, and to assist in post auditing of the installation.

Benefits of the bolt

  • Increased range for resin annulus
  • Improved mixing of resin
  • Reduced likelihood of gloving
  • Reduction in resin voids
  • Improved centralisation of the bolt
  • Higher support capacity

Specifications

HelixBolt

Bolt diameter (mm) Ø18 Ø20
Typical ultimate tensile load (kN)* 176 220
Hole size range (mm) Ø34– Ø38** Ø34– Ø38**
Application Stiff resin bolt

HelixBolt Plus

Bolt diameter (mm)*** Ø18
Typical ultimate tensile load (kN)* 194
Hole size range (mm) Ø34– Ø38**
Application High tensile capacity stiff resin bolt
*Annual QC test average, statistical data available on request
**Smaller hole diameter option available on request
***Other size options available on request
Tri-lobe end

Tri-lobe end

Washer plate, spherical seat and nut with shear pin

Washer plate, spherical seat and nut with shear pin