Monoblock Train Wheel

Table of Contents

The two main train wheels created and used are Bandaged wheels and monobloc wheels, as explained on the wagon bandage page. We introduce the train block menu wheel product on this page. A Monoblock wheel, also known as an integrated train wheel, is a device that functions as both a core and a bandage at the same time. This contrasts with bandaged wheels, manufactured and used in two pieces.

 The crucial aspect of the monobloc wheel is that it offers significantly greater driving safety than wagon bandages provide. As a result, advanced civilizations and those who control rail technology have largely adopted monobloc wheels in recent years due to the increased speed of the new rail cars. Monobloc products have taken the position of bandaged wheels in rail transportation, and in addition to boosting speed, they also significantly reduce costs.

One of the technological characteristics of this product is that despite having a single chemical composition, the train monobloc product must have different metallurgical and mechanical properties at different points. This is in addition to the fact that the production of this product is extremely complicated. A high and complex technology with a history of almost a decade of activity in the railway field and spending more than three years is required in order to create a unique pattern of different metallurgical and mechanical properties in the various parts of a wheel. This pattern also requires a special chemical analysis. Internal production of this product was ultimately decided upon due to the extremely high costs involved in the research and development of the product, as well as the allocation of those costs.

Production of monobloc train wheels in Isfahan Kafriz company

Isfahan Kafriz Company was the first local producer of monobloc wheels, and after three years of engineering and research and several trial manufacturing, they proudly produced this product. It is relying on its internal resources and experienced and dedicated experts. Because of the use of sophisticated technology in the manufacturing process, as well as unique metallurgical complications and a very high safety factor.
Isfahan Kafriz Company is the only manufacturer of this product in the country and the Middle East. It has been able to localize it and alleviate various transportation industry issues while reducing reliance on foreign businesses.


Monoblock train wheels' technical details

Product NameUnit of measurementHS codecustomersTechnical Specifications
Monoblock groupring86071910Rail transport companies (passenger-cargo)
Wagon manufacturing companies – locomotive manufacturing companies, urban train companies
 ModelMonoblock 920 freight wagon BA004 IK42 – A11
Monoblock 920 Persian freight wagon IK42 – A12
Monoblock 957 Russian freight wagon IK42 – A21
Monobloc 920 passenger car IK42 – C11
Monoblock 1000 locomotive IK42 – B11
Monoblock 860 Metro IK42 – E11
 Size.Outside Dia(mm) 860 – 1100
.BoreDia(mm) 175 – 200
Width (mm) 130 – 138
 3 Weight320 – 580 (Kg)
 4Material baseCarbon Steel – Ck series

Note: Depending on the model, the technical requirements vary, and these variations are primarily caused by variations in the size and weight.

Monoblock train wheel specifications

Product NameApprovals / Standards / LicensesReceipt/estimated datevalidity durationReference Issuer
Train MonoblocConfirmation that the product complies with the EN 13262 standard and may be produced as 920 mm-diameter monobloc wheels for freight wagons.1399/9/17Continuous trackingIslamic Republic of Iran Railways
Confirmation that the product complies with GOST 10791 standards and may be produced as monobloc wheels for freight wagons with a 957 mm diameter.1400/3/2Continuous trackingIslamic Republic of Iran Railways

Application and advantages of monobloc train wheels

Applications of monobloc train wheels

• Uses for monobloc train wheels
• In rail transportation
• Freight wagons are used to transport cargo.
• To transport passengers on intercity trains
• To transport passengers in city trains (metro)
• Locomotive traction machine direction

The Benefits of an Integrated Train Wheel (monoblock)

• Rail transportation is safer than road transportation.
• When compared to bandage, rail transport provides greater safety and speed.
• Compared to other modes of transportation, there is a significant reduction in the use of fuel resources.
• Keeping and improving environmental conditions, as well as reducing pollution in rail transportation
• Creating jobs and recruiting human resources in the manufacturing and service sectors
• Significant savings on freight and goods, as well as the possibility of gaining a competitive advantage in a variety of industries
• Higher durability and endurance, as well as economic efficiency due to a longer life span than bandaged wheels

Making monobloc train wheels: the steps

مراحل ساخت چرخ منوبلوک قطار | اصفهان کفریز

Isfahan, Kafriz's method for manufacturing monoblock railway wheels

In addition to the City Trains wagon bandage product, the hot forming section’s forging and rolling activities require specialized molds, special engineering procedures, and special equipment and technology. Monobloc train wheels are made using heavy hot forging, wheel rolling, and a particular heat treatment technique to match technical specifications and quality standards in the standard. As a result, this product has various metallurgical and mechanical qualities in different regions. after the production process is complete, despite having a single chemical composition, which is one of its characteristics.
A high and complex technology is required to achieve a specific pattern of different metallurgical and mechanical properties in various wheel parts with a single chemical analysis. In 2019, Isfahan Kafriz Company, which has a history of almost ten years of activity in the railway sector, produced this strategic product entirely domestically by investing significant time and money in research and engineering affairs regarding monobloc wheels. These dimensional, geometrical requirements and surface conditions of the wheel make the machining of this product much more difficult. Special needs for the surface profile of the wheel are also defined in the international standards related to monobloc wheels. in addition to specific dimensional and geometrical tolerances. Special methods and tools must be considered to comply with the standard’s requirements.




Various special tests and inspections have also been carried out for the quality control process, and the review of technical conditions. the product is within the acceptance range. The product’s complicated features and monobloc wheel’s high safety factor made this possible. International standards are unique, specified, and necessary. It is important to clarify that some of these tests and inspections are extremely complicate. especially because of the degree of technology employed in them, the essential services were previously supplied from overseas. Currently, the base of these engineering services is mentioned in the field. The quality unit of this collection has been entirely localized. As a result, it mostly functions as a research-engineering facility that offers specialized inspection and laboratory services to other businesses.

Features of Isfahan Kafriz train block menu wheel

One of the technical challenges of train block menu wheel product is that it has different mechanical properties in various diameters. sections, as well as other methods and technologies for shaping different parts of the piece. This product also has different thicknesses in different departments, which adds to the technical complexity of the product. One of the additional difficulties with this product is its production procedure.
This strategic product is made using far more complicated procedures than bandage products. such as heavy forging operations, wheel rolling operations (which are much more difficult than rim rolling activities), specialized heat treatment, and complex machining operations. Cited. Additionally, international standards have taken into account numerous and unique tests and inspections for monobloc wheels, some of which are highly complicated and especially owing to the technology employed in them. till before these services, due to the high safety factor of this particular product. It wasn’t available nationwide, and the engineering above services platform has been entirely localized. The quality unit of this collection is mostly an engineering-research center that offers specialized inspection and laboratory services to other businesses.

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