R28 Thread Reaming Bit Split Type Rock Drill Bit For Center Hole Reaming
Price:
Please contact us
MOQ:
10PCS
Delivery Time:
Negotiable
Brand:
HLDRILL
Product Description
R28 Thread Reaming Rock Drill Bit for Center Hole Reaming
Reaming rock drill bits, also known as pilot reamer bits, are hole openers that drill a pilot hole to a certain depth and then ream the hole to a larger diameter. Primarily used for center hole reaming in long hole drilling, these bits come in threaded varieties including integral reaming bits (dome type, pilot type) and split-type reaming bits.
Product Specifications
| Parameter | Value |
|---|---|
| Thread | R28 |
| Diameter | 102mm |
| No.×Buttons Dia | 1×10mm, 14×12mm |
| Skirt Design | Normal |
| Weight | 3.1kg |
| Carbide Design | Spherical |
| Face Design | Dome |
| Carbide Brand and Grade | ZCC/YK05 |
| Steel Grade | 45CrNiMoVA |
Functional Overview
In top hammer drilling, dome reaming bits and pilot reaming bits serve specific functions in the drilling process:
Pilot Drill Bit
- Function: In down-the-hole hammer drilling, the pilot drill bit drills the initial pilot hole with a smaller cutting diameter, penetrating rock and initiating the drilling process
- Application: Used at the beginning of drilling operations to create straight, precisely sized pilot holes that guide subsequent tools and maintain hole verticality
Ball-Shaped Reaming Bit
- Function: Features a larger cutting diameter to enlarge the pilot hole to required final diameter, removing additional rock material
- Application: Used in later drilling stages to achieve desired hole diameter, facilitating installation of larger equipment or casing
This sequential use of different drill bits ensures drilling accuracy, efficiency, and operational control in down-the-hole hammer drilling applications.
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Company
Yanggu Henglong Construction Machinery Co., Ltd.
Location
4F,6# Building,No.19 Hunan Road,Liaocheng City,Shangdong province,China
Contact Person
Alisa Huang