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High-Quality 1524mm TC315 Guide Sheave Assembly from China Suppliers and Factory for Crown Block Systems
Product Specifications
- ▶Product Name: Deadline Sheave Assembly / Guide Sheave Assembly
- ▶Application: Used on Drilling TC315 Crown Block
- ▶Sheave OD: 1524 mm (60 inches)
- ▶Groove Diameter: 38 mm (1½ inch)
- ▶Material: 45# Alloy Steel (AISI 1045 / JIS S45C)
- ▶Temperature Rating: -40°C to 120°C
- ▶Service Life: 8–10 years under normal drilling conditions, with periodic bearing and groove maintenance as required
- ▶Standard: Produced under API 8C
- ▶Third-Party Inspection: Bureau Veritas (BV), CCS, ABS, SJS, etc.
Product Features
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✓OEM InterchangeabilityDesigned with full compatibility for BOMCO, LSNOV, and similar manufacturer assemblies, enabling direct replacement and minimized rig downtime.
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✓Durable Alloy Steel ConstructionThe alloy steel main body provides excellent wear resistance, fatigue strength, and ease of repair through forging-welding.
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✓Strict NDE ProtocolsMandatory MPI and UT ensure each unit meets stringent structural and safety criteria, reducing risks in field operations.
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✓API 8C ComplianceManufactured under API Spec 8C licensing, meeting material traceability, grooving, and inspection requirements. Our API 8C certificate number: 8C-0349.
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✓Precision Groove SizingThe groove diameter (38 mm) matches the drilling line, avoiding excessive friction or wear, while optimizing line support and longevity.
Crafted to mirror the fit and function of BOMCO, LSNOV, and other leading OEM assemblies, it ensures seamless interchangeability. This assembly is designed to precisely guide the drilling line — whether it's the fast line or deadline — within the crown block framework, maintaining proper alignment and load distribution. The main sheave body is made from high-quality 45# alloy steel, chosen for superior toughness, fatigue resistance, and weldability, ensuring long-term reliability in demanding drilling operations.
Quality Assurance & Compliance
Each TC-315 Guide Sheave Assembly undergoes rigorous inspection protocols before delivery. We perform full Magnetic Particle Inspection (MPI) and Ultrasonic Testing (UT) on all welds and sheave surfaces to detect internal and surface discontinuities, ensuring structural integrity. The rope groove diameter is precisely sized to accommodate 38 mm (1½ inch) drilling line.
Overall, manufacturing and quality control adhere strictly to API Spec 8C standards, offering global assurance of safety and performance.
Contact for more details about the Guide (Deadline) Sheave Assembly which is used for HONGHUA, RG, RONGSHENG, EMSCO, LSNOV.
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Product Details
Frequently Asked Questions (FAQ)
Q What is the Deadline Sheave Assembly used for?
The Deadline Sheave Assembly (also called Guide Sheave Assembly) is used on the TC315 Crown Block in drilling rigs. It precisely guides the drilling line — including the fast line and deadline — within the crown block framework, maintaining proper alignment and load distribution during drilling operations.
Q Is this sheave assembly compatible with BOMCO and LSNOV crown blocks?
Yes. This assembly is designed with full OEM interchangeability for BOMCO, LSNOV, and similar manufacturer assemblies. It also fits crown blocks from HONGHUA, RG, RONGSHENG, and EMSCO, enabling direct replacement and minimizing rig downtime.
Q What material is the sheave body made from?
The main sheave body is manufactured from 45# alloy steel (equivalent to AISI 1045 / JIS S45C). This material is selected for its superior toughness, fatigue resistance, wear resistance, and weldability, making it highly reliable for long-term use in demanding drilling environments.
Q What quality inspections are performed on each assembly?
Each TC-315 Guide Sheave Assembly undergoes full Magnetic Particle Inspection (MPI) and Ultrasonic Testing (UT) on all welds and sheave surfaces before delivery. These non-destructive evaluations (NDE) detect both internal and surface discontinuities, ensuring full structural integrity and compliance with API Spec 8C standards.
Q Is third-party inspection and certification available?
Yes. Third-party witness inspection and official reports are available from recognized certification bodies including Bureau Veritas (BV), CCS, ABS, and SJS. Our API 8C certificate number is 8C-0349.
Q What is the expected service life of this sheave assembly?
Under normal drilling conditions, the Deadline Sheave Assembly is designed to deliver a service life of 8 to 10 years. Regular periodic maintenance of bearings and rope grooves is recommended to achieve optimal longevity and performance throughout the assembly's operational life.