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China Suppliers Factory for 1524mm MTPM TC-315 Guide Sheave Assembly 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
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 us for more details about the Guide (Deadline) Sheave Assembly used for HONGHUA, RG, RONGSHENG, EMSCO, LSNOV.
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Product Details
Deadline Sheave Assembly – View 2
Deadline Sheave Assembly – View 1
Frequently Asked Questions (FAQ)
QWhat is the Deadline Sheave Assembly used for in TC315 Crown Block?
The Deadline Sheave Assembly (also called Guide Sheave Assembly) is designed to precisely guide the drilling line — including the fast line and deadline — within the TC315 Crown Block framework. It maintains proper alignment and load distribution during drilling operations.
QIs this sheave assembly compatible with BOMCO and LSNOV equipment?
Yes. The assembly is engineered for full OEM interchangeability with BOMCO, LSNOV, HONGHUA, RG, RONGSHENG, EMSCO, and similar manufacturer assemblies, enabling direct replacement with minimal rig downtime.
QWhat material is the sheave body made from, and why?
The main sheave body is manufactured from 45# alloy steel (AISI 1045 / JIS S45C). This material is selected for its superior toughness, fatigue resistance, and weldability, ensuring long-term reliability under demanding drilling conditions.
QWhat quality inspections are performed on each assembly?
Every TC-315 Guide Sheave Assembly undergoes mandatory Magnetic Particle Inspection (MPI) and Ultrasonic Testing (UT) on all welds and sheave surfaces. These non-destructive evaluation (NDE) protocols detect internal and surface discontinuities to ensure full structural integrity before delivery.
QIs the assembly certified under API 8C standards?
Yes. The Deadline Sheave Assembly is manufactured under API Spec 8C licensing, covering material traceability, grooving specifications, and inspection requirements. Our API 8C certificate number is 8C-0349. Third-party inspection reports are available from Bureau Veritas (BV), CCS, ABS, SJS, and others.
QWhat is the expected service life of the TC315 Guide Sheave Assembly?
Under normal drilling conditions with periodic bearing and groove maintenance, the assembly is designed for a service life of 8 to 10 years. The operating temperature range is -40°C to 120°C, making it suitable for a wide range of drilling environments.