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MT-TC Series Crown Block for Drilling Rigs - Reliable Oil & Gas Hoisting Equipment from China Suppliers & 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
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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.
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A safety chain protector is installed to enhance operational security, while an integrated maintenance gantry provides convenient access for sheave inspection and repair.
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Depending on drilling contractor requirements, MTPM can supply the crown block with optional bailing pulleys and auxiliary pulley assemblies, expanding its application range.
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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.
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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 with full compliance with API and Chinese standards.
Product Details
MT TC 225 Crown Block
MT TC315 Crown Block
Frequently Asked Questions
❓ What API standards do MT-TC crown blocks comply with?
MT-TC crown blocks are manufactured in full accordance with API Spec 4F (drilling structures) and API Spec 8C (drilling and production hoisting equipment), and also meet the Chinese industry standard SY/T 5527. Each sheave is individually certified to API Spec 8C (8C-0349).
❓ What third-party inspection certifications are available?
Third-party witness and inspection reports are available from internationally recognized bodies including Bureau Veritas (BV), CCS, ABS, and SJS, providing customers with independent quality verification.
❓ What is the maximum hook load capacity of the MT-TC crown block series?
The MT-TC crown block series ranges from a maximum hook load of 900 kN (MTTC90) up to 4,500 kN (MTTC450), covering a wide range of drilling rig requirements from light to heavy-duty applications.
❓ Are the crown block sheaves interchangeable 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 procedures and helps reduce spare parts inventory costs.
❓ What safety features are included in the MT-TC crown block?
The crown block includes wireline guide rods and rope retention plates to prevent the drilling line from slipping out under dynamic loads, a safety chain protector for enhanced operational security, and an integrated maintenance gantry for easy sheave inspection and repair access.
❓ Can optional pulley assemblies be added to the MT-TC crown block?
Yes. Depending on the drilling contractor's requirements, MTPM can supply the crown block with optional bailing pulleys and auxiliary pulley assemblies, expanding the operational application range of the equipment to suit various rig configurations.