A master link (or quick release link) is an accessory for roller chains that makes it easy to connect and disconnect them without the need for a chain breaker.[1] It functions as an outer plate link that connects two inner plate links of the chain. These master links may or may not be reusable.[2] To install them, you need a tool that allows you to remove a link from a new chain before reconnecting its ends. They are used in bicycles and motorcycles.[3].
On bicycles
Contenido
Hay al menos dos tipos de enlace maestro utilizados para conectar cadenas de bicicleta. En ambos casos, el conjunto de enlace maestro consta de dos placas exteriores, ambas similares a las de un eslabón exterior de una cadena.
Compatible with a straight chain
The oldest type of master link, available for decades, has two pivots connected to the same plate (Figure 1). It has been used primarily on single-speed bicycles, with internal gears, or other bicycle transmission systems with straight chain paths or widely spaced sprockets. In this arrangement, the outer plate has the two pivots spaced at the same pitch as the chain (one-half inch), and the free ends of the pivots are splined. The counter plate is secured over the free ends of the pivots by a flexible metal clip. This type of master link is usually reusable.
Compatible with a derailleur
For bicycles with derailleurs, a special kind of master link has been developed so that it can be installed on narrow chains designed to work on closely spaced sprockets. In this case, each plate has a pivot, both with the free end knurled (Figures 2, 3 and 4). In addition to the pivots, each link plate has a slot, with a wide side that allows the slotted end of the pivot to be inserted, and a narrow side into which the splined head of the pivot fits.
The link plates are located opposite each other, and are connected to the chain by introducing their pivots through the rollers of the inner plates, . In this way, the pair of plates forms a closed link, with the pivot of each piece of the master link secured in the groove of the other piece. The connection is secured by stretching the chain on both sides of the link, which forces the heads of the pivots into the narrow parts of the slots, where they become confined. The overall safety of a master link depends on the chain in normal use remaining taut, although it may fail under extreme conditions when this condition is not met.
Quick release pins
Introduction
A master link (or quick release link) is an accessory for roller chains that makes it easy to connect and disconnect them without the need for a chain breaker.[1] It functions as an outer plate link that connects two inner plate links of the chain. These master links may or may not be reusable.[2] To install them, you need a tool that allows you to remove a link from a new chain before reconnecting its ends. They are used in bicycles and motorcycles.[3].
On bicycles
Contenido
Hay al menos dos tipos de enlace maestro utilizados para conectar cadenas de bicicleta. En ambos casos, el conjunto de enlace maestro consta de dos placas exteriores, ambas similares a las de un eslabón exterior de una cadena.
Compatible with a straight chain
The oldest type of master link, available for decades, has two pivots connected to the same plate (Figure 1). It has been used primarily on single-speed bicycles, with internal gears, or other bicycle transmission systems with straight chain paths or widely spaced sprockets. In this arrangement, the outer plate has the two pivots spaced at the same pitch as the chain (one-half inch), and the free ends of the pivots are splined. The counter plate is secured over the free ends of the pivots by a flexible metal clip. This type of master link is usually reusable.
Compatible with a derailleur
For bicycles with derailleurs, a special kind of master link has been developed so that it can be installed on narrow chains designed to work on closely spaced sprockets. In this case, each plate has a pivot, both with the free end knurled (Figures 2, 3 and 4). In addition to the pivots, each link plate has a slot, with a wide side that allows the slotted end of the pivot to be inserted, and a narrow side into which the splined head of the pivot fits.
from opposite sides
To remove a master link, manufacturers recommend pressing the two plates inward, while approaching the two links adjacent to the link. When a link is new, or when it is difficult to remove, special pliers can be used (Figure 5). These pliers have curved tips to accommodate the rollers, making removal easy even in the most difficult cases.
Some links have side plates that are curved upward (Figure 4), while others are straight, (Figure 3), and some have more prominent pivots than others. Since a chain in a derailleur system is inverted for part of its travel through the derailleur, and rear sprocket rings have very tight geometric tolerances, some master links could cause failure if not chosen well. Pinless chains, with smaller projections, are used on bicycles with high sprocket numbers, where width is a much more critical factor than on bicycles with only seven speeds. In these cases, a master link of comparable quality to that of the chain is required. As a result of this requirement, some derailleur manufacturers (such as SRAM "SRAM (cycling)") recommend using only their own products, and provide a master link with each new chain. Chains for small sets of sprockets (up to seven speeds) and for other types of bicycles without derailleurs, are more tolerant of the dimensions of the master link.
Find more "Quick release pins" in the following countries:
The link plates are located opposite each other, and are connected to the chain by introducing their pivots through the rollers of the inner plates, from opposite sides. In this way, the pair of plates forms a closed link, with the pivot of each piece of the master link secured in the groove of the other piece. The connection is secured by stretching the chain on both sides of the link, which forces the heads of the pivots into the narrow parts of the slots, where they become confined. The overall safety of a master link depends on the chain in normal use remaining taut, although it may fail under extreme conditions when this condition is not met.
To remove a master link, manufacturers recommend pressing the two plates inward, while approaching the two links adjacent to the link. When a link is new, or when it is difficult to remove, special pliers can be used (Figure 5). These pliers have curved tips to accommodate the rollers, making removal easy even in the most difficult cases.
Some links have side plates that are curved upward (Figure 4), while others are straight, (Figure 3), and some have more prominent pivots than others. Since a chain in a derailleur system is inverted for part of its travel through the derailleur, and rear sprocket rings have very tight geometric tolerances, some master links could cause failure if not chosen well. Pinless chains, with smaller projections, are used on bicycles with high sprocket numbers, where width is a much more critical factor than on bicycles with only seven speeds. In these cases, a master link of comparable quality to that of the chain is required. As a result of this requirement, some derailleur manufacturers (such as SRAM "SRAM (cycling)") recommend using only their own products, and provide a master link with each new chain. Chains for small sets of sprockets (up to seven speeds) and for other types of bicycles without derailleurs, are more tolerant of the dimensions of the master link.
Find more "Quick release pins" in the following countries: