Kelly Bar

Kelly Bar

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Description

The Friction Kelly Bar is a telescopic drilling component designed to transfer rotary torque and crowd force from the drilling rig to the drilling tool during bored piling operations. It is particularly suitable for deep foundation drilling in clay, silt, sand, gravel, and other soft to medium-density ground conditions.
Manufactured from high-strength alloy steel with wear-resistant drive strips, the friction Kelly bar offers excellent drilling depth capability, smooth telescopic operation, and reliable performance. Its lightweight yet durable design makes it an ideal choice for deep pile construction and large-scale foundation projects.

Specifications

Product TypeFriction Kelly Bar
ApplicationRotary Drilling and Foundation Piling
Kelly Bar TypeFriction Type Telescopic Kelly Bar
Number of Sections3 – 6 Sections
MaterialHigh-Strength Alloy Steel
Drive SystemWear-Resistant Friction Strips
Torque TransmissionRotary Drive Torque Transfer
Ground ConditionsClay, Silt, Sand, Gravel and Mixed Soil
CompatibilityBauer, Soilmec, Casagrande, IMT, SANY and Other Rotary Drilling Rigs
Surface ProtectionHeat Treated and Wear-Resistant Components
CustomizationDiameter, Length, Number of Sections and Rig Compatibility Available

Product Parameters

ModelDrilling Depth (m)A (mm)B (mm)D (mm)Total Weight (T)
5 sections Friction Φ377-5×10m451019046700114005.08
5 sections Friction Φ377-5×12m551219056700134006.1
5 sections Friction Φ406-5×13m581307560800145708.02
5 sections Friction Φ406-5×15m681507570800165709.27
5 sections Friction Φ445-5×13m581307560800145709.79
5 sections Friction Φ445-5×15m6815075708001657011.3
5 sections Friction Φ419-5×13m581307560800145708.98
5 sections Friction Φ419-5×15m6815075708001657010.17
5 sections Friction Φ470-5×13m5813075608001457011.05
5 sections Friction Φ470-5×15m6815075708001657012.75
6 sections Friction Φ508-6×13m6813075608001458012.7
6 sections Friction Φ508-6×15m8115075708001658014.65
6 sections Friction Φ580-6×18m9918050980001975020.54
6 sections Friction Φ580-6×20m110200501100002175022.82
5 sections Friction Φ530-5×16m7216050880001775015.3
5 sections Friction Φ530-5×18m8218050980001975017.21
6 sections Friction Φ630-6×20m110200501133002170025.89
6 sections Friction Φ630-6×24m130240501373002570031.07

Note: Other sizes can be customized.

Features

  • Telescopic design with 3 to 6 drilling sections.
  • High-strength steel construction for demanding applications.
  • Wear-resistant friction strips for smooth operation.
  • Suitable for deep pile drilling projects.
  • Lightweight design compared to interlocking Kelly bars.
  • Excellent torque transmission and drilling efficiency.
  • Heat-treated critical components for extended service life.
  • Compatible with major rotary drilling rig brands.
  • Custom-built configurations available.

Benefits

  • Enables deeper drilling capabilities for foundation projects.
  • Provides smooth telescopic extension and retraction.
  • Reduces equipment weight while maintaining strength.
  • Improves drilling productivity in soft and mixed ground conditions.
  • Lower maintenance requirements due to wear-resistant components.
  • Extended service life through premium material construction.
  • Compatible with a wide range of rotary drilling rigs.
  • Customizable design to suit specific project requirements.

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