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China MT-TC Series Crown Block for Drilling Rigs | Reliable Suppliers & Quality Factory Equipment
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
API Spec 4F
API Spec 8C
API 8C-0349
SY/T 5527
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.
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.
The MT-TC crown block represents a well-balanced solution combining durability, operational safety, and adaptability to various rig configurations — engineered for drilling rig hoisting systems and compliant with both 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 accordance with API Spec 4F (for drilling structures) and API Spec 8C (for drilling and production hoisting equipment). Each sheave is also individually certified to API Spec 8C (8C-0349). Additionally, they comply with the Chinese industry standard SY/T 5527.
Q
What is the maximum hook load capacity available in the MT-TC series?
The MT-TC series offers a range of hook load capacities. The largest model, MTTC450, supports a maximum hook load of 4,500 kN, while the smallest model, MTTC90, supports up to 900 kN — making the series suitable for a wide variety of drilling rig configurations.
Q
Are third-party inspection reports available for the MT-TC crown blocks?
Yes. Third-party witness and inspection reports are available from internationally recognized certification bodies including Bureau Veritas (BV), CCS, ABS, and SJS, providing drilling contractors with full confidence in product quality and compliance.
Q
Can the crown block sheaves be interchanged with traveling block sheaves?
Yes. The MT-TC crown block is designed so that its sheaves are interchangeable with those of the traveling block when both share the same hook load rating. This simplifies maintenance operations and helps reduce the spare parts inventory required on-site.
Q
What safety features are included in the MT-TC crown block?
The MT-TC crown block includes several key safety features: wireline guide rods and rope retention plates to prevent the drilling line from jumping out under dynamic loads, a safety chain protector for enhanced operational security, and an integrated maintenance gantry for safe and convenient sheave inspection and repair.
Q
What treatments are applied to the sheave grooves to ensure long service life?
To maximize durability, the sheave grooves undergo quenching and surface hardening treatments. These processes significantly improve wear resistance and minimize deformation under heavy loads, ensuring reliable long-term performance even in demanding drilling environments.