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  3. Duplex Pipe
  4. Diameter expansion bit for down-the-hole hammer ADMS W Type (Wellman Co., Ltd.)
Diameter expansion bit for down-the-hole hammer ADMS W Type-ADMS W Type
Diameter expansion bit for down-the-hole hammer ADMS W Type-Wellman Co., Ltd.

Diameter expansion bit for down-the-hole hammer ADMS W Type
Wellman Co., Ltd.

About This Product

■Summary

The "ADMS W Ttype" has been further improved on the ADMS-BD type enlarged diameter bit for down-the-hole hammers, which has been well received since its release, and has significantly improved drilling efficiency and bit life. The diameter expansion bit ADMS-W type, which is indispensable for the double pipe construction method and enables rapid drilling in all geological formations, expands the blade (diameter expansion part) when turned clockwise and locks at the same time to prevent return. Rotating to the left retracts the blade and releases the lock. The blade installation has been improved from the conventional device's pin hole structure, which eliminates the possibility of pins falling out. Improvements to the pilot bit part have improved slime (hort debris) lift and weight balance.

■Characteristics of ADMS W Ttype

- Evenly spaced pilot bits and blades prevent holes from being biased and bend. ・The reinforced blade increases the diameter of the enlarged part by 60% (compared to our conventional model), allowing for smooth bit rotation. - A locking mechanism is used to prevent diameter drop (shrinkage of the expanded diameter part) during drilling, which is common with various diameter expansion bits. - The blade retention structure has been changed from the pin hole type (our conventional model), so the pin does not fall out. -Easy to disassemble, inspect, and replace parts.

  • Product

    Diameter expansion bit for down-the-hole hammer ADMS W Type

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1 Models of Diameter expansion bit for down-the-hole hammer ADMS W Type

Image Part Number Price (excluding tax)
Diameter expansion bit for down-the-hole hammer ADMS W Type-Part Number-ADMS W Type

ADMS W Type

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About Company Handling This Product

Wellman Co., Ltd.

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