What is the warranty or guarantee for the product?

The product features advanced grease pressure control and thrust faces hardfaced with wear-resistant alloy to ensure durability and performance.

Where is the company located and how is shipping handled?

The factory is in Hejian City, Cangzhou, Hebei, China. It is near Beijing airport and Tianjin seaport, with fast inland transportation taking only one day.

8 1/2" Rock Cutter Roller Cone Single Bit

Name: 8 1/2" Rock Cutter Roller Cone Single Bit
Brand: Hejian Longyue Drill Bit Manufacture Co., Ltd.
SKU: 2165446795

Hebei, ChinaHejian Longyue Drill Bit Manufacture Co., Ltd.

US$250.00-300.00

1 Piece

Sample price:US$250.00/piece.Request sample

Product profile

Customization

Available

Customized

Standard

AISI

Model NO.

8.5

Type

Center Drill Bit

Material

High Carbon Steel

Usage

Well Drilling

Machine Type

Drilling Tool

Processing Type

Forging

Advantage

High-Efficiency ,Wear Resistant

Bearing Type

Journal /Roller Bearing Bit

Transport Package

Wooden Case

Specification

8.5"

Trademark

LONGYUE

Origin

Hebei, China

HS Code

8207199000

Production Capacity

200 Pieces/Week

Key features

High-Efficiency & Wear Resistant: Forged high carbon steel with tungsten carbide inserts for superior durability.

Advanced Bearing System: Metal sealed and rubber sealed bearings with friction-reducing alloy for long life.

Customizable Nozzles: Center nozzle can be customized to meet specific drilling requirements.

Wide Size Range: Available in 7 1/2'', 8 1/2'', 9 7/8'', and 12 1/4'' bit sizes.

Multiple IADC Codes: Supports IADC codes 117, 127, 126, 217, 417, 437, 517, 537, 617, 627, 637, 737.

Fast Delivery: Regular models in stock with prompt delivery; mass production within 15 workdays.

OEM/ODM Service: Supports customized machine types, processing types, and bearing configurations.

Gauge Protection: More carbide inserts on the shirttail increase gauge holding capability and bearing life.

Company profile

Hejian Longyue Drill Bit Manufacture Co., Ltd.

Hebei, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2016-08-01 CertifiedNearest Port: Tianjin PortAverage Response Time: ≤5.90h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryHejian Longyue Drill Bit Manufacture Co., Ltd. is a China-based manufacturing factory in Hejian, Cangzhou, Hebei, established in 2016, with 67 employees and a 10,000 m² plant. It produces drilling-related equipment, operates more than 10 production lines, and has 6–10 quality-control staff. The supplier states that it can design HY PDC bits according to customer requirements, indicating customization capability. It has five years of R&D engineer experience, exports 51%–70% of sales, and holds self-operated import and export rights. However, the provided information does not confirm certifications, after-sales capabilities, or verified customer cases. Trade records show limited documented import activity involving Uzbekistan and Kazakhstan, but these records alone do not establish broad customer performance or financial credibility.

Supplier typeThe supplier is explicitly identified as a factory/manufacturer and a limited company located in Hejian, Cangzhou, Hebei, China. Its stated business scope includes drilling equipment and manufacturing-related products, consistent with a specialized industrial manufacturer.

R&D capabilityThe supplier reports five years of total R&D engineer experience and states that it can design HY PDC bits according to customer requests. This provides explicit evidence of product-design capability, although no broader R&D team size, patents, testing facilities, or innovation results are given.

Production capacityThe supplier operates more than 10 production lines, employs 6–10 quality-control staff, and has a 10,000 m² manufacturing plant with 67 total employees. These stated operational resources support a positive assessment of production capability, though actual capacity and delivery performance are not specified.

Customization capabilityThe company explicitly states that it can design HY PDC bits according to customer requirements. Its listed product range includes PDC bits, tricone bits, roller cones, hole openers, rock reamers, and related drilling products, supporting product-specific customization capability.

Product Q&A

Q:How to get an exact quotation?

Please send detailed information including bit type (Tricone/PDC/Hole opener/Roller cutters), diameter, IADC code, blade quantity, cutter size, pilot hole size, rock hardness, thread connection, drilling depth, rig capacity, application, Incoterm (FOB/CIF/CFR), transport method, and destination port. Photos are also helpful.

Q:What are the lead time and payment terms?

Regular models are available in stock for prompt delivery. Mass production lead time is within 15 workdays. We accept L/C, T/T, D/P, and PayPal.

Q:What is the material and construction of the bit?

The bit is made of high carbon steel with tungsten carbide inserts and inlaid friction-reducing alloy. It features metal sealed and rubber sealed bearings with an advanced grease pressure control system.

Q:What are the recommended drilling parameters for IADC 637?

For IADC 637, use WOB of 0.5-1.2 kn/mm and RPM of 80-40. It is suitable for hard to very hard formations with high compressive strength, such as hard limestone, dolomite, and marble.

Q:Can the nozzle be customized?

Yes, the center nozzle can be customized to suit specific drilling needs.