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Friction Kelly Bar for rotary piling rig
Friction Kelly Bar for rotary piling rig
Specifications
Place of Origin :
China
Brand Name :
DZ
Model Number :
355/377/406/419/470//440/508/530/575/580/630
Certification :
ISO9001/SGS
Description

Specifications
1.taper drill rod and integral drill rod
2.durable steel material for longtime use
3.high quality and reasonable price


kelly bar for rotary /piling/ foundation drilling

There are three large groups or N groups pressure concave parts in the external key, three or six wear-resistant keys in the internal keys. The length of the bar is less than the length of large concave tine of the external key. When the driving force rotates, the internal key of the driving set or the internal key of kelly bar rotate to the large concave tine of the external key, and formed a Kai-type pressuring point. Driving force head send pressure to the drill head, then forms a mechanical locking. A full rotary drill head must be rotary in the opposite direction to unlock, then smoothing reversal upgrade.

This kelly bar is used for hard or soft layer to drill, which have better transmission pressure. This kelly bar need to move driving force head up and down. When drilling in hard layer,. It transfer pressure after find the large concave meshing tine in the external. At resent,the mechanical pressuring kelly bar is usually combined with three sections, four sections and five sections, with the drilling depth in the range of 36-80 meters.

Outer Diameter (mm)

Elements

Maximum drilling depth (m)

Retracted length (m)

298

4 or 5

32.50 to 50

7.5 to 11.00

324

4

25.50 to 32.50

8.00 to 9.00

340

4

32 to 56

9.00 to 16.00

355

4 or 5

19 to 55

6.00 to 12.00

368

3 or 4

18 to 52

7.00 to 15.00

377

4 or 5

31 to 60

8.50 to 13.00

394

3 or 4

21 to 64

9.50 to 18.50

406

4 or 5

32 to 77

9.00 to 16.50

419

4 or 5

25.70 to 67.50

7.50 to 14.50

440

3 or 5

18 to 72

7.50 to 15.50

470

4 or 6

32 to 90

9.00 to 19.00

483

4 or 5

37 to 77

10.50 to 16.50

508

4 or 5

32 to 75

9.50 to 16.00

*Other dimensions on request,We can also provide kelly bar for BAUER, MAIT, IMT, SOILMEC, CASAGRANDE and other foreign brands rotary drilling rig.

Product tags

rotary joint working principle

,

rotary piling rig

,

self centering lathe chuck
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Friction Kelly Bar for rotary piling rig

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Product Detail
Place of Origin :
China
Brand Name :
DZ
Model Number :
355/377/406/419/470//440/508/530/575/580/630
Certification :
ISO9001/SGS
Contact Supplier
Friction Kelly Bar for rotary piling rig

Beijing Guangying Construction Machinery Co.,Ltd

Active Member
12 Years
Beijing, Beijing
Since 2008
Business Type :
Manufacturer,Distributor/Wholesaler,Exporter,TradingCompany,Seller
Main Products :
Absorber Spring, Casing, drill auger
Total Annual :
$1,000,000-$5,000,000
Employee Number :
100-200
Certification Level :
Active Member
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