Friction Kelly Bar

Applications:

1.Friction kelly bars are normally supplied in 4 or 5 telescopic elements, they are mostly used for deep piles in in silt, clay and less dense sand and gravel.

Features

1.2 to 6-part telescopic for depths of 15 - 140 m.

2.Torque transfer from 120 - 500 kNm

3.6 drive keys with large lock recesses

4.Shock absorbing system by spring assembly

5.Standardized square kelly drive stub for all drilling tools

Descriptions

1.Kelly bars are key components in the execution of boreholes with hydraulic rotary drilling rigs. They transfer the torque of the rotary drive and the crowd pressure of the crowd system concurrently to the drilling tool.

2.A Kelly bar consists of 2 – 5 telescopic tubular sections with a system of drive keys and lock recesses, welded onto their outer surfaces.

3.Standard Kelly bars are fabricated with a total of 6 drive keys on each section. The tubular Kelly sections are manufactured from high-tensile steel to ensure minimum weight at adequate strength.

Technical Parameters

Outer Dia.(mm)	Model	Section	Tube length(m)	Drilling depth(m)	Torque (KNM)
φ299/305	Interlock	3/4	9-14	24-70	110-120
	Friction	3/4/5/6
φ340/343	Interlock	3/4	9-14	24-70	110-120
	Friction	3/4/5/6
Φ355	Interlock	3/4	9-14	24-70	110-120
	Friction	3/4/5/6
φ368	Interlock	3/4	9-14	24-70	110-120
	Friction	3/4/5/6
φ377	Interlock	3/4	9-14	24-70	110-120
	Friction	3/4/5/6
φ394	Interlock	3/4	9-15	24-70	180-200
	Friction	3/4/5/6
φ406	Interlock	3/4	9-15	24-70	150-180
	Friction	3/4/5/6
φ419/426	Interlock	3/4	9-15	24-70	180-200
	Friction	3/4/5/6
φ440-445	Interlock	3/4	9-15	24-85	200-230
	Friction	3/4/5/6
φ470	Interlock	3/4	9-18	24-102	220-260
	Friction	3/4/5/6
φ482	Interlock	3/4	9-18	24-102	260-360
	Friction	3/4/5/6
φ508/510	Interlock	3/4	9-18	24-102	220-260
	Friction	3/4/5/6
φ530	Interlock	3/4	9-20	32-114	320-400
	Friction	3/4/5/6
φ558/560	Interlock	3/4	9-24	32-118	360-420
	Friction	3/4/5/6
φ575/580	Interlock	3/4	9-24	32-118	360-420
	Friction	3/4/5/6
φ630	Interlock	3/4	9-26	32-150	400-500
	Friction	3/4/5/6

Friction Kelly Bar

Features

Descriptions

Technical Parameters

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