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Security Standard Hole Openers Diamond Core Drill Bits For Enlargement Of Pilot Holes

1 pcs
Security Standard Hole Openers Diamond Core Drill Bits For Enlargement Of Pilot Holes
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Name: Hole Opener
Type: Pilot Holes
Materials: AISI 4145 Fully Heat Treated Alloy Steel
Model: Security Standard And Security Custom Hole Openers
Usage: Rock Drilling
Drying Type: Directional Drilling
Use: Rock Bit Or Bull-nose Pilot Bits
Series: Smith Tricone Bits
Series No.: Roller Tricone Rock Drill Bits
Name Item: Rock Tircone Drill Bits
High Light:

milled tooth drill bit


tricone rock roller bit

Basic Infomation
Place of Origin: CHINA
Brand Name: ROSCHEN
Certification: ISO
Model Number: 8 1/2″ to 56″
Payment & Shipping Terms
Packaging Details: Poly wood box
Supply Ability: 1000 pcs
Product Description


Hole Openers Used for Enlargement of Pilot Holes and Large Hole Applications 

Security Standard Hole Openers are designed for enlargement of pilot holes, directional drilling and large hole applications

ROSCHEN single stage hole opener is a simple but rugged design used for enlargement of pilot holes and large hole applications from 8 1/2″ to 56″. The body is machined from AISI 4145 fully heat treated alloy steel with arms welded onto the body providing location for the cutters. Arms and cutters are hardfaced for protection. The cutters are available in different designs for varying conditions and rock formations. The cutter assembly is a fully sealed unit incorporating ball & roller bearings. Retaining the whole assembly is achieved by a locking pin. The design of the hole opener enables quick overhauls on the rig site. Three or six replaceable nozzles are used giving optimum mud circulation around the cutters. 

Roschen offers Security Standard and Security Custom Hole Openers.  


Security Standard Hole Openers  

Roschen Security Standard Hole Openers are designed for enlargement of pilot holes, directional drilling and large hole applications. 


Enlargement of pilot holes, directional drilling and large hole applications.  


Features and Benefits:  

1. Integral bodies for strength.  
2. Interchangeable cutters allow changing of the cutter assemblies when worn or when new formations are reached. 
3. Quick-change cutter assemblies (simple pin removal on the rig floor using only hand tools) 
4. Regular circulation, or 6-nozzle (3 cutter pocket, 3 wing) circulation for optimizing available hydraulics.
5. Snap-ring nozzle retention for easy disassembly.  
6. Rock bit or bull-nose pilot equipment available. 


Hole Size Range in(mm) 8.3/8-8.3/4 (213-222) 12-12.1/4 (305-311) 17.1/4-17.1/2 (438-445) 22 (559) 24.1/2-26 (622-660)
Minimum Pilot Hole Size in(mm) 5.7/8 (149) 8.1/8 (206) 12 (305) 13.1/4 (337) 15.1/2 (394)
Cutter Sizes in(mm) 8.3/8 (213) 8.1/2 (216) 8.5/8 (219) 8.3/4 (222) 12-(305) 12.1/4 (311) 17.1/4 (438) 17.1/2 (445) 22 (559) 24.1/2 (622) 25 (635) 26 (660)
Standard Fishing Neck OD in(mm) 5.3/4-6 (146-152) 8 (203) 8 - 9.1/2 (203-241) 8 - 9.1/2 (203-241) 8 – 9.1/2 (203-241)
Approximate Body Weight lbs(kg) 248 (112.5) 540 (245) 960 (435) 1650 (748) 1932 (876)



Q: Are you a manufacturer or trading company?
A: We are a specialized manufacturer.

Q: What are your main products, and used for?
A: Our products include core bit, PDC bit, reaming shell, core barrel, casing, drill rod, SPT equipment, Shelby sampler, drill rig and other drilling parts.
They are used for mineral exploration, geological drilling, geotechnical engineering and soil sampling.

Q: How about the delivery terms?
1. Payment: T/T, L/C, Western Union, Paypal, 30% deposit in advance and rest before delivery.
2. Min. order quantity: 1 piece.
3. Transportation: By DHL/TNT/Fedex express, air, sea, train.

Q: How about discount?
A: Price is based on products and order quantity.

Q: Do you accept sample order?
A: Yes sure, please contact us for details.

Q: How about your after-sales service?
A: As a manufacturer, we offer promt technology support for all problems and questions. Besides, we accept goods return or replace for quality problem.

Q: How does your company control the quality?
A: Quality first. In order to guarantee high quality for our products, Roschen always makes a serious inspection for all products and raw materials in strict procedure. We have obtained certificate of ISO9001:2000 in 2004.


For more information please contact:



WeChat: +86-137 6419 5009 ; +86-135 8585 5390

WhatsApp: +86-137 6419 5009 ; +86-135 8585 5390

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Contact Person : Bill, George, Michael
Tel : 8613764195009
Fax : 86-021-54380177
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