GOST 28186-89 PDF

Full title and description

ГОСТ 28186-89 — Колодки тормозные для моторвагонного подвижного состава. Технические условия. (English title: "Brake shoes for motor car of rolling stock. Specifications"). The standard specifies technical requirements, material composition, allowable defects and acceptance rules for cast-iron brake shoes used on motorized railway rolling stock.

Abstract

This standard defines manufacturing and quality requirements for brake shoes intended for motor railcars: permissible chemical composition of cast iron, hardness ranges for different types, casting tolerances and surface-defect limits, mechanical tests of the metal backing (spine), inspection and acceptance sampling rules, and profile/dimensional checks required at incoming inspection. It is a short technical specification (6 pages) focused on ensuring interchangeability, safety and performance of brake shoes on 1520 mm gauge rolling stock.

General information

• Status: Registered in public catalogs as действующий (active) in many databases; some registries note it has been or will be superseded by newer consolidated standards for railway brake shoes (see Related standards).
• Publication date: Original designation year 1989; date of introduction into force / application: 01 January 1991.
• Publisher: Межгосударственный стандарт (issued under the state standards system; later distributed/republished by standard collections/publishers such as Стандартинформ).
• ICS / categories: ICS / OKS classification for railway rolling stock — 45.060 (more specifically listed in some catalogs as 45.060.10).
• Edition / version: Original standard ГОСТ 28186-89 (1989); commonly referenced reprints in collections — no later formal revision number under the same designation is shown in public catalogs.
• Number of pages: 6 pages (short technical specification).

Scope

The standard applies to brake shoes intended for motorized railcars (motor-rail rolling stock). It covers cast-iron brake shoes (several types identified in the text), their required chemical composition and mechanical properties, permissible casting defects and dimensional tolerances, methods and volumes of acceptance testing, and marking/packaging requirements needed to ensure safe and reliable operation on railway braking systems.

Key topics and requirements

• Material: specification of cast-iron grades and chemical-composition ranges for different brake-shoe types (elements C, Si, Mn, P, S given as weight % ranges).
• Hardness: required Brinell hardness ranges for types (examples: type Ф and type Р have specified HB ranges in the standard).
• Casting and dimensional tolerances: casting accuracy class, permissible surface defects (limits on shrinkage cavities, scabs, local depressions, edge chips and allowed frequencies in a batch).
• Mechanical tests: testing of the metal backing (spine) for bending/fracture, hardness measurements at prescribed locations, mass and profile verification.
• Acceptance and sampling: rules for batch acceptance, sample sizes for visual inspection, hardness and profile checks; definition of a party (e.g., maximum number per batch as specified).
• Normative references: cross-references to related GOSTs governing steel grades, casting accuracy, measurement methods and metallic materials (examples listed in the standard's references).

Typical use and users

Manufacturers of railway brake components and foundries producing brake shoes; rolling-stock OEMs and repair shops performing replacement and maintenance; procurement and quality departments verifying batch acceptance; testing laboratories performing hardness and metallurgical checks; regulatory and conformity-assessment bodies responsible for railway technical safety. Maintenance manuals and spare-part specifications for motorized railcars commonly reference this standard.

Related standards

The document includes normative references to multiple GOSTs covering materials and measurement methods (examples: ГОСТ 103, ГОСТ 380, ГОСТ 503, ГОСТ 1050, ГОСТ 26645, etc., as cited in the standard). A more recent consolidated standard for cast-iron brake pads for railway rolling stock — ГОСТ 33695-2015 (and its subsequent amendments and planned introduction dates) — covers general technical requirements for cast-iron brake pads and has been introduced in various registers; in some catalogs ГОСТ 33695-2015 is indicated as the newer general technical specification replacing or superseding earlier sectoral documents. Users should check the current national/regulatory status in their jurisdiction to determine which document is the authoritative requirement.

Keywords

колодки тормозные, тормозные колодки, моторвагонный подвижной состав, brake shoes, rolling stock, cast iron, hardness, acceptance testing, ГОСТ 28186-89, railway brake pads.

FAQ

Q: What is this standard?

A: ГОСТ 28186-89 is a technical specification for brake shoes used on motor railcars (motorized rolling stock), defining material, mechanical and inspection requirements for cast-iron brake shoes.

Q: What does it cover?

A: It covers chemical-composition limits for cast iron, Brinell hardness ranges by type, casting and dimensional tolerances, permissible defects, acceptance sampling and testing procedures, and related marking/packaging rules for brake shoes. The full text is a short (≈6-page) technical conditions document.

Q: Who typically uses it?

A: Foundries and component manufacturers, railway vehicle OEMs and maintenance/repair workshops, QA and procurement specialists, and conformity/inspection laboratories working with brake-shoe production and acceptance.

Q: Is it current or superseded?

A: Public registries and standards catalogs list ГОСТ 28186-89 as действующий in many collections, with introduction date 01.01.1991; however, a more recent consolidated standard for cast-iron brake pads (ГОСТ 33695-2015) has been adopted and is being used as the general technical specification in many contexts. Practitioners should verify the applicable standard in their country/contract (some sources show ГОСТ 33695-2015 as the replacing document).

Q: Is it part of a series?

A: It is a sectoral GOST for railway brake-shoe technical conditions and references numerous related GOSTs on materials, casting accuracy and measurement methods; later, general standards (for example ГОСТ 33695-2015) consolidate brake-shoe requirements for a broader scope of railway applications.

Q: What are the key keywords?

A: Brake shoes, brake blocks, cast iron, hardness, motor car (motor-rail) rolling stock, acceptance testing, ГОСТ 28186-89.