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B and XB Series Single Tube Core Barrels

B type single tube core barrels are suitable for drilling when no core examination is required (e.g. the drilling of grout holes). XB type are suitable for extended concrete coring.

Whereas the B type core barrel is of fixed length, the XB core barrel is easily extendable during drilling by adding additional metric casing tubes between the core barrel head and reaming shell.  In both series, the core lifter fits into the the taper on the inside of the core bit  so a core lifter case is not required.

Available in 9 different diameters for metric (millimetre) hole sizes between 46 - 146 mm.

Advantages:

  • Saves cost when no core examination is required
  • Easily extendable in length when coring through thick concrete.

Technical Data

Specification Core Barrel Type

B46

XB46

B56

XB56

B66

XB66

B76

XB76

B86

XB86

B101

XB101

B116

XB116

B131

XB131

B146

XB146

Hole Diameter (mm) 46.3 56.3 66.3 76.3 86.3 101.3 116.3 131.3 146.3
Core Diameter (mm) 31.7 41.7 51.7 61.7 71.7 86.7 101.7 116.7 131.7
Kerf / Crown Thickness (mm) 7.15 7.15 7.15 7.15 7.15 7.15 7.15 7.15 7.15
Cutting Area (cm2) 8.9 11.2 13.5 15.8 18.1 21.6 25.0 28.4 31.9
Hole Area (cm2) 16.8 24.9 34.5 45.7 58.5 80.6 106.2 135.4 168.1
Cutting Area as % of Hole Area 53% 45% 39% 35% 31% 27% 24% 21% 19%
Core Area (cm2) 7.9 13.7 21.0 29.9 40.4 59.0 81.2 107.0 136.2
Thread Connection in Head CR42 CR50 CR50 CR50 CR50 NW NW NW NW
Recommended Casing M56 M66 M76 M86 M101 M116 M131 M146 -

*Cross-over sub required for drill rods not matching the thread connection in core barrel head

Key to Main Parts of B and XB Core Barrel Assemblies

Complete core barrel consists of:

1. Core Barrel Head

2. Sample Tube 0.5m, 1.0m, 1.5m or 3.0m long

3. Reaming Shell  (Blank)

4. Core Lifter

Core Bit is not supplied as part of the core barrel assembly, but must be chosen correctly to match the particular application and rock formation. A Blank Reaming Shell is supplied with the Core Barrel, but TC or Diamond type may be required for reaming purposes.  Please refer to our Core Bits page for further details.