Belltec offers a comprehensive selection of Auger Bit Extensions in both telescopic and fixed styles. Telescopic extensions slide inside the auger bit, enabling adjustable reach when extra depth is needed. Fixed extensions deliver an instant length increase and are ideal for equipment with sufficient operating height. All extensions are available in the most commonly used connection sizes to ensure a secure fit with.

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Variable Extensions Specs & Compare
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Variable Extensions Features & Benefits
  • Purpose: Variablelength auger extensions are designed to extend the drilling reach of a Belltec hydraulic auger drive, while offering adjustable insertion depth — multiple pinning positions along the shaft allow flexible use without needing a fixed single length. Variable models have additional holes spaced along the shaft so you can choose how far the extension inserts into the auger bit coupler.
  • Coupler / Shaft Sizes:
    – 2″ Hex VariableLength Extension (female hex to male hex with multiple adjustment holes)
    – 2″ Round VariableLength Extension (female round to male round with multiple adjustment holes)
    – 2.5″ Round VariableLength Extension (female 2.5″ round to male 2.5″ round with multiple adjustment holes)
  • Compatibility: Works with Belltec auger drives and similar drives that match the coupler shaft size (hex or round) and with augers having a hollow shaft coupler compatible with the extension type.
  • Adjustment / Hole Spacing: Variable models include additional pin holes spaced at regular intervals (e.g., every ~14″ along the shaft as allowed by length) so drilling depth can be adjusted without changing extensions.
  • Lengths Available (variable): Variablelength extensions are offered in various lengths corresponding to overall fixed lengths used for adjustable pin positions; typical choices include the same length ranges as fixed (e.g., 24″, 36″, 48″, 60″, 72″), with multiple pin holes along each shaft for adjustment.
  • Coupler / Adjustment Holes: Variable extensions include a series of pin holes spaced down the extension shaft so you can adjust how deep the extension inserts into the auger bit coupler and thus vary drilling depth.
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