How to Read BGL Codes: Designation Structure, Prefixes, Suffixes, and Real Examples

BGL codes combine letters and numbers to identify each fastening or dismounting part. The initial letters indicate the product type, such as adapter sleeve, hydraulic sleeve, or nut. The following numbers identify the size, linked to the bearing and shaft with which the part works. For example, in the code H221, the letter H indicates an adapter sleeve and the number defines its size.

In addition to the initial letters, some codes include additional characters that provide information about the design. It is important not to confuse these characters with those of other manufacturers, as each brand has its own system. To avoid errors, it is advisable to copy the complete code exactly as it is engraved on the part. A single misinterpreted digit or letter can lead to ordering an incompatible part.

When reading a BGL code, pay attention to the complete sequence. An error of a single digit can mean an incompatible part. Therefore, when requesting a quote, we recommend sending a photo of the part or the original packaging. This way, MR's technical team can verify the exact designation and offer the correct replacement.

BGL adapter sleeves are identified with the letter H followed by a number. These sleeves are mounted on cylindrical shafts to allow the fixation of bearings with tapered bore. For example, H221 and H320 are two adapter sleeves of the H series with different sizes.

In the designation of an adapter sleeve, the number following the H usually indicates the size of the bearing or shaft. H208 is another example of the same series. It is essential to verify the shaft and bearing dimensions before choosing the sleeve. A poorly selected sleeve can cause poor mounting and damage to the bearing.

When ordering a BGL adapter sleeve, it is advisable to indicate the complete code and, if possible, the shaft dimensions. At MR we supply BGL adapter sleeves and can advise you on the correct designation. It is also useful to know if the sleeve will be used in a high-load application or in a vibrating environment, to recommend the appropriate fit.

BGL hydraulic sleeves are designated with the letters AOH followed by a number. These sleeves allow easier mounting and dismounting of bearings with tapered bore, by injecting oil under pressure. For example, the code AOH234 identifies a hydraulic sleeve for a specific bearing size. The AOH series is ideal for applications requiring precise and repeatable fit.

The number in an AOH hydraulic sleeve relates to the series and size of the bearing with which it works. For example, AOH252 and AOH256 are sleeves for bearings of different sizes. It is important to verify compatibility between the sleeve and the bearing, as a mismatch can cause mounting problems. At MR we help you identify the correct hydraulic sleeve according to the bearing code.

When quoting a BGL hydraulic sleeve, send the complete code and, if you have it, the bearing number. It is also useful to know if the mounting will be done with a manual pump or with a central hydraulic system. With that information, we can indicate the exact designation and the necessary accessories for safe mounting.

BGL withdrawal sleeves are identified with the letters AH followed by a number. Unlike adapter sleeves, these are designed to facilitate the dismounting of bearings with tapered bore. For example, the code AH220 corresponds to a withdrawal sleeve for a specific bearing size. The AH series is widely used in industrial maintenance.

The number in an AH withdrawal sleeve usually indicates the size of the bearing or shaft. For example, AH320 and AH217 are sleeves for different applications. It is crucial to choose the correct sleeve to avoid damage to the bearing or shaft during dismounting. An inadequate sleeve can get stuck or not provide the necessary force.

When requesting a BGL withdrawal sleeve, indicate the complete code and the bearing dimensions. At MR we supply these sleeves and can advise you on the correct designation.

BGL lock nuts are designated with the letters KM or ZM followed by a number. These nuts are used to secure bearings on sleeves or directly on threaded shafts. For example, KM14 is a nut of the KM series and ZM15 one of the ZM series, each with its size.

The number in a lock nut usually indicates the thread diameter or the size of the associated sleeve. For example, KM32 is a nut for a larger sleeve. It is important to verify the thread pitch and diameter to ensure a correct fit. A poorly selected nut can loosen or damage the shaft thread.

When ordering a BGL lock nut, send the complete code and, if possible, the diameter and thread pitch. At MR we supply these nuts and can help you identify the correct designation. It is also useful to know if a lock washer will be used, as some nuts require a specific type of washer for safe locking.

BGL hydraulic nuts are identified with the letters HMV followed by a number and, sometimes, an additional letter. These nuts allow applying controlled force for mounting bearings with tapered fit. For example, the code HMV24E corresponds to a hydraulic nut for a specific shaft diameter. The HMV series is ideal for applications requiring precise mounting without impact.

The number in an HMV hydraulic nut usually indicates the thread diameter or the sleeve size. For example, HMV42E and HMV60E are nuts for larger diameter shafts. It is important to verify compatibility with the sleeve and bearing.

When quoting a BGL hydraulic nut, send the complete code and shaft dimensions. At MR we supply these nuts and can advise you on the correct designation. It is also advisable to use a suitable hydraulic pump and follow the mounting instructions to avoid damage to the nut or bearing.

BGL lock washers are used together with lock nuts to prevent them from loosening. Their designation follows the same logic: letters indicating the type and numbers defining the size. It is essential to choose the correct washer for each nut, as an inadequate fit can compromise mounting safety.

BGL mounting and maintenance tools include wrenches, pullers, and other accessories to facilitate the installation and dismounting of bearings. When selecting a tool, it is important to verify that it is compatible with the size of the part to be mounted.

When requesting BGL washers or tools, send the code or a detailed description of the part. At MR we supply BGL accessories and can indicate the exact designation. Write to us via WhatsApp or email with the code, size, or a photo of the part and we will respond promptly from Buenos Aires, Argentina.