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China MT-TC Series Crown Block - Reliable Hoisting System for Drilling Rigs by Leading Suppliers and Factory
📋 Product Specifications
| Model | MTTC90 | MTTC170 | MTTC225 | MTTC315 | MTTC450 | |
| Max. Hook Load (kN) | 900 | 1700 | 2250 | 3150 | 4500 | |
| Diameter of Wire Line (mm) | 26 | 29 | 32 | 35 | 38 | |
| O.D. of Sheaves mm (in) | 762 (30") | 1005 (40") | 1120 (44") | 1270 (50") | 1524 (60") | |
| Number of Sheaves | 5 | 6 | 6 | 7 | 7 | |
| Overall Dimension (mm) | Length | 2317 | 2668 | 2668 | 3192 | 3410 |
| Width | 2076 | 2460 | 2709 | 2783 | 2753 | |
| Height | 1577 | 1855 | 2469 | 2350 | 2420 | |
| Weight (KGS) | 2668 | 4540 | 6500 | 8500 | 11105 | |
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Third party witness and inspection report available: Bureau Veritas (BV), CCS, ABS, SJS etc.
🛡️ Compliance and Reliability
All MT-TC crown blocks are manufactured in full accordance with API Spec 4F (for drilling structures) and API Spec 8C (for drilling and production hoisting equipment). They also comply with the requirements of the Chinese industry standard SY/T 5527, ensuring safety and consistency with domestic regulations.
Each sheave in the crown block is individually certified to API Spec 8C (8C-0349), ensuring verified quality and performance under rated loads.
To guarantee long service life, the sheave grooves are subjected to quenching and surface hardening treatments, which greatly improve wear resistance and minimize deformation under heavy loads.
Each unit is inspected and tested to meet international safety requirements, offering drilling contractors a product that is both trustworthy and cost-efficient in long-term operation.
⚙️ Product Features
- 🔩 The crown block is equipped with wireline guide rods and rope retention plates, which effectively prevent the drilling line from jumping out of the sheave groove or slipping under dynamic loads.
- 🔗 A safety chain protector is installed to enhance operational security, while an integrated maintenance gantry provides convenient access for sheave inspection and repair.
- 🔧 Depending on drilling contractor requirements, MTPM can supply the crown block with optional bailing pulleys and auxiliary pulley assemblies, expanding its application range.
- 🔄 The product design allows the crown block sheaves to be interchangeable with those of the traveling block when they share the same hook load rating, simplifying maintenance and reducing spare parts inventory.
- ✅ With these features, the MT-TC crown block represents a well-balanced solution that combines durability, operational safety, and adaptability to various rig configurations.
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Engineered for drilling rig hoisting systems, combining durability, safety, and compliance with API and Chinese standards.
🖼️ Product Details
MT TC 225 Crown Block
MT TC315 Crown Block
❓ Frequently Asked Questions
Q
What API standards do the MT-TC crown blocks comply with?
The MT-TC crown blocks are manufactured in full compliance with API Spec 4F (for drilling structures) and API Spec 8C (for drilling and production hoisting equipment). They also meet the Chinese industry standard SY/T 5527. Each individual sheave is certified to API Spec 8C (8C-0349).
Q
What models are available and what are their maximum hook load capacities?
Five models are available: MTTC90 (900 kN), MTTC170 (1700 kN), MTTC225 (2250 kN), MTTC315 (3150 kN), and MTTC450 (4500 kN), covering a wide range of drilling rig hoisting requirements.
Q
Can third-party inspection and certification be arranged for the crown blocks?
Yes. Third-party witness inspections and certification reports are available from internationally recognized bodies including Bureau Veritas (BV), CCS, ABS, and SJS, providing customers with full confidence in product quality and compliance.
Q
Are the crown block sheaves interchangeable with traveling block sheaves?
Yes. The MT-TC crown block sheaves are designed to be interchangeable with traveling block sheaves of the same hook load rating. This design feature simplifies on-site maintenance and helps reduce spare parts inventory costs for drilling contractors.
Q
What safety and maintenance features are built into the crown block?
The crown block includes wireline guide rods and rope retention plates to prevent the drilling line from jumping out of the sheave groove. A safety chain protector enhances operational security, and an integrated maintenance gantry allows convenient access for regular sheave inspection and servicing.
Q
What treatments are applied to the sheave grooves to extend service life?
The sheave grooves undergo quenching and surface hardening treatments, significantly improving wear resistance and reducing deformation under heavy loads. This process ensures consistent performance and a longer operational lifespan even under demanding drilling conditions.