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Technical Overview of the Bernard QJL-564 Jump Liner<\/h2>\n
The Bernard QJL-564 Jump Liner is a specialized consumable component engineered for high-amperage, heavy-duty welding applications utilizing the Bernard Dura-Flux gun series. Specifically designed to accommodate 5\/64-inch (approximately 1.98mm) welding wire, this liner is critical for maintaining electrical conductivity and smooth wire delivery in self-shielded flux-cored arc welding (FCAW-S) processes. The \"gasless\" designation indicates its optimization for open-arc welding environments where external shielding gas is not required, a common scenario in structural steel erection and heavy equipment repair.<\/p>\n\n
Jump liners, such as the QJL-564, serve a vital mechanical function within the MIG gun assembly. Located within the gooseneck (or neck) of the torch, the jump liner bridges the gap between the main conduit liner and the contact tip. This section of the gun is subject to the most extreme heat and the tightest bend radius, causing accelerated wear compared to the rest of the liner system. By utilizing a segmented liner approach, Bernard allows operators to replace only this sacrificial section, preserving the integrity of the main liner and significantly reducing maintenance costs and changeover time.<\/p>\n\n
Manufactured from high-grade coiled steel, the QJL-564 provides the necessary rigidity to prevent wire buckling while maintaining enough flexibility to navigate the neck's curvature. The internal diameter is strictly controlled to minimize friction and prevent micro-arcing between the wire and the liner wall, which can lead to erratic arc characteristics. This 10-pack configuration ensures that maintenance teams have an adequate supply of critical spares on hand, facilitating continuous operation in high-throughput industrial environments. Compatibility is strictly focused on the Dura-Flux line, ensuring precise fitment and gas-tight (where applicable) or fume-tight seals within the gun head assembly.<\/p>","product_description_text":"Technical Overview of the Bernard QJL-564 Jump Liner\nThe Bernard QJL-564 Jump Liner is a specialized consumable component engineered for high-amperage, heavy-duty welding applications utilizing the Bernard Dura-Flux gun series. Specifically designed to accommodate 5\/64-inch (approximately 1.98mm) welding wire, this liner is critical for maintaining electrical conductivity and smooth wire delivery in self-shielded flux-cored arc welding (FCAW-S) processes. The \"gasless\" designation indicates its optimization for open-arc welding environments where external shielding gas is not required, a common scenario in structural steel erection and heavy equipment repair.\n\nJump liners, such as the QJL-564, serve a vital mechanical function within the MIG gun assembly. Located within the gooseneck (or neck) of the torch, the jump liner bridges the gap between the main conduit liner and the contact tip. This section of the gun is subject to the most extreme heat and the tightest bend radius, causing accelerated wear compared to the rest of the liner system. By utilizing a segmented liner approach, Bernard allows operators to replace only this sacrificial section, preserving the integrity of the main liner and significantly reducing maintenance costs and changeover time.\n\nManufactured from high-grade coiled steel, the QJL-564 provides the necessary rigidity to prevent wire buckling while maintaining enough flexibility to navigate the neck's curvature. The internal diameter is strictly controlled to minimize friction and prevent micro-arcing between the wire and the liner wall, which can lead to erratic arc characteristics. This 10-pack configuration ensures that maintenance teams have an adequate supply of critical spares on hand, facilitating continuous operation in high-throughput industrial environments. Compatibility is strictly focused on the Dura-Flux line, ensuring precise fitment and gas-tight (where applicable) or fume-tight seals within the gun head assembly.","suggested_attributes":[{"name":"Brand","values":["Bernard (bernard)"]},{"name":"Item","values":["Liner (liner)"]},{"name":"Packaging","values":["pack of 10 (pack-of-10)"]},{"name":"Wire Type","values":["Flux Core or Metal Core (flux-core-or-metal-core)"]}],"extra_attributes":[{"name":"Wire Diameter","values":["5\/64\""]},{"name":"Compatible Guns","values":["Bernard Dura-Flux"]},{"name":"Liner Type","values":["Jump Liner"]},{"name":"Process","values":["Gasless \/ Self-Shielded FCAW"]}],"suggested_pretty_url":"bernard-qjl-564-jump-liner-5-64-gasless-10-pack","predecessor":"null","releaseYear":2010,"releaseYearGuess":2010,"successor":"null","features":["Designed specifically for 5\/64-inch (approx. 2.0 mm) welding wire","Optimized for gasless, self-shielded flux-cored arc welding (FCAW-S)","Compatible with Bernard Dura-Flux series MIG guns","Jump liner configuration allows for quick replacement in the gun neck","Durable steel construction withstands high heat and abrasion","Reduces downtime by eliminating the need to replace the full-length liner for neck wear","Ensures smooth wire feeding in heavy-duty industrial applications","Supplied in a convenient package of 10 liners"],"applications":"
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Bridge and Infrastructure Construction<\/li>
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Technical Overview of the Bernard QJL-564 Jump Liner<\/h2>\n
The Bernard QJL-564 Jump Liner is a specialized consumable component engineered for high-amperage, heavy-duty welding applications utilizing the Bernard Dura-Flux gun series. Specifically designed to accommodate 5\/64-inch (approximately 1.98mm) welding wire, this liner is critical for maintaining electrical conductivity and smooth wire delivery in self-shielded flux-cored arc welding (FCAW-S) processes. The \"gasless\" designation indicates its optimization for open-arc welding environments where external shielding gas is not required, a common scenario in structural steel erection and heavy equipment repair.<\/p>\n\n
Jump liners, such as the QJL-564, serve a vital mechanical function within the MIG gun assembly. Located within the gooseneck (or neck) of the torch, the jump liner bridges the gap between the main conduit liner and the contact tip. This section of the gun is subject to the most extreme heat and the tightest bend radius, causing accelerated wear compared to the rest of the liner system. By utilizing a segmented liner approach, Bernard allows operators to replace only this sacrificial section, preserving the integrity of the main liner and significantly reducing maintenance costs and changeover time.<\/p>\n\n
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Structural Steel Erection<\/li>
Heavy Equipment Repair and Maintenance<\/li>
Bridge and Infrastructure Construction<\/li>
Shipbuilding (Flux-Cored Applications)<\/li>
General Heavy Fabrication using Self-Shielded Wire<\/li><\/ul>","includes":"
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Technical Overview of the Bernard QJL-564 Jump Liner<\/h2>\n
The Bernard QJL-564 Jump Liner is a specialized consumable component engineered for high-amperage, heavy-duty welding applications utilizing the Bernard Dura-Flux gun series. Specifically designed to accommodate 5\/64-inch (approximately 1.98mm) welding wire, this liner is critical for maintaining electrical conductivity and smooth wire delivery in self-shielded flux-cored arc welding (FCAW-S) processes. The \"gasless\" designation indicates its optimization for open-arc welding environments where external shielding gas is not required, a common scenario in structural steel erection and heavy equipment repair.<\/p>\n\n
Jump liners, such as the QJL-564, serve a vital mechanical function within the MIG gun assembly. Located within the gooseneck (or neck) of the torch, the jump liner bridges the gap between the main conduit liner and the contact tip. This section of the gun is subject to the most extreme heat and the tightest bend radius, causing accelerated wear compared to the rest of the liner system. By utilizing a segmented liner approach, Bernard allows operators to replace only this sacrificial section, preserving the integrity of the main liner and significantly reducing maintenance costs and changeover time.<\/p>\n\n
Manufactured from high-grade coiled steel, the QJL-564 provides the necessary rigidity to prevent wire buckling while maintaining enough flexibility to navigate the neck's curvature. The internal diameter is strictly controlled to minimize friction and prevent micro-arcing between the wire and the liner wall, which can lead to erratic arc characteristics. This 10-pack configuration ensures that maintenance teams have an adequate supply of critical spares on hand, facilitating continuous operation in high-throughput industrial environments. Compatibility is strictly focused on the Dura-Flux line, ensuring precise fitment and gas-tight (where applicable) or fume-tight seals within the gun head assembly.<\/p>","product_description_text":"Technical Overview of the Bernard QJL-564 Jump Liner\nThe Bernard QJL-564 Jump Liner is a specialized consumable component engineered for high-amperage, heavy-duty welding applications utilizing the Bernard Dura-Flux gun series. Specifically designed to accommodate 5\/64-inch (approximately 1.98mm) welding wire, this liner is critical for maintaining electrical conductivity and smooth wire delivery in self-shielded flux-cored arc welding (FCAW-S) processes. The \"gasless\" designation indicates its optimization for open-arc welding environments where external shielding gas is not required, a common scenario in structural steel erection and heavy equipment repair.\n\nJump liners, such as the QJL-564, serve a vital mechanical function within the MIG gun assembly. Located within the gooseneck (or neck) of the torch, the jump liner bridges the gap between the main conduit liner and the contact tip. This section of the gun is subject to the most extreme heat and the tightest bend radius, causing accelerated wear compared to the rest of the liner system. By utilizing a segmented liner approach, Bernard allows operators to replace only this sacrificial section, preserving the integrity of the main liner and significantly reducing maintenance costs and changeover time.\n\nManufactured from high-grade coiled steel, the QJL-564 provides the necessary rigidity to prevent wire buckling while maintaining enough flexibility to navigate the neck's curvature. The internal diameter is strictly controlled to minimize friction and prevent micro-arcing between the wire and the liner wall, which can lead to erratic arc characteristics. This 10-pack configuration ensures that maintenance teams have an adequate supply of critical spares on hand, facilitating continuous operation in high-throughput industrial environments. Compatibility is strictly focused on the Dura-Flux line, ensuring precise fitment and gas-tight (where applicable) or fume-tight seals within the gun head assembly.","suggested_attributes":[{"name":"Brand","values":["Bernard (bernard)"]},{"name":"Item","values":["Liner (liner)"]},{"name":"Packaging","values":["pack of 10 (pack-of-10)"]},{"name":"Wire Type","values":["Flux Core or Metal Core (flux-core-or-metal-core)"]}],"extra_attributes":[{"name":"Wire Diameter","values":["5\/64\""]},{"name":"Compatible Guns","values":["Bernard Dura-Flux"]},{"name":"Liner Type","values":["Jump Liner"]},{"name":"Process","values":["Gasless \/ Self-Shielded FCAW"]}],"suggested_pretty_url":"bernard-qjl-564-jump-liner-5-64-gasless-10-pack","predecessor":"null","releaseYear":2010,"releaseYearGuess":2010,"successor":"null","features":["Designed specifically for 5\/64-inch (approx. 2.0 mm) welding wire","Optimized for gasless, self-shielded flux-cored arc welding (FCAW-S)","Compatible with Bernard Dura-Flux series MIG guns","Jump liner configuration allows for quick replacement in the gun neck","Durable steel construction withstands high heat and abrasion","Reduces downtime by eliminating the need to replace the full-length liner for neck wear","Ensures smooth wire feeding in heavy-duty industrial applications","Supplied in a convenient package of 10 liners"],"applications":"
Structural Steel Erection<\/li>
Heavy Equipment Repair and Maintenance<\/li>
Bridge and Infrastructure Construction<\/li>
Shipbuilding (Flux-Cored Applications)<\/li>
General Heavy Fabrication using Self-Shielded Wire<\/li><\/ul>","includes":"
10 x Bernard QJL-564 Jump Liners (5\/64\")<\/li><\/ul>","faqs":[{"question":"What wire diameter is the QJL-564 designed for?","answer":"The QJL-564 is designed specifically for 5\/64-inch (approx. 2.0 mm) welding wire.","type":"JOSEF GAS"},{"question":"Is this liner compatible with gas-shielded MIG welding?","answer":"This liner is designated as 'Gasless', meaning it is optimized for self-shielded flux-cored applications, typically used with Bernard Dura-Flux guns.","type":"JOSEF GAS"},{"question":"What is the primary advantage of using a jump liner?","answer":"A jump liner allows for the replacement of the liner section in the gun neck—where the most wear occurs—without needing to replace the entire gun liner, saving time and material costs.","type":"WELDERS"},{"question":"How many liners are included in this package?","answer":"This product is a package of 10 jump liners.","type":"WELDERS"},{"question":"Which MIG guns does the QJL-564 fit?","answer":"It is designed for use with Bernard Dura-Flux series welding guns.","type":"JOSEF GAS"},{"question":"Can I use this liner for smaller wire sizes like .045?","answer":"It is not recommended. Using a liner significantly larger than the wire diameter can cause poor electrical contact and erratic wire feeding. You should use a liner matched to your wire size.","type":"WELDERS"},{"question":"Is this an OEM Bernard part?","answer":"Yes, the QJL-564 is a genuine Bernard product.","type":"JOSEF GAS"},{"question":"What material is the liner made from?","answer":"It is made from durable coiled steel suitable for heavy-duty flux-cored wires.","type":"WELDERS"}]}"
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Technical Overview of the Bernard QJL-564 Jump Liner<\/h2>\n
The Bernard QJL-564 Jump Liner is a specialized consumable component engineered for high-amperage, heavy-duty welding applications utilizing the Bernard Dura-Flux gun series. Specifically designed to accommodate 5\/64-inch (approximately 1.98mm) welding wire, this liner is critical for maintaining electrical conductivity and smooth wire delivery in self-shielded flux-cored arc welding (FCAW-S) processes. The \"gasless\" designation indicates its optimization for open-arc welding environments where external shielding gas is not required, a common scenario in structural steel erection and heavy equipment repair.<\/p>\n\n
Jump liners, such as the QJL-564, serve a vital mechanical function within the MIG gun assembly. Located within the gooseneck (or neck) of the torch, the jump liner bridges the gap between the main conduit liner and the contact tip. This section of the gun is subject to the most extreme heat and the tightest bend radius, causing accelerated wear compared to the rest of the liner system. By utilizing a segmented liner approach, Bernard allows operators to replace only this sacrificial section, preserving the integrity of the main liner and significantly reducing maintenance costs and changeover time.<\/p>\n\n
Manufactured from high-grade coiled steel, the QJL-564 provides the necessary rigidity to prevent wire buckling while maintaining enough flexibility to navigate the neck's curvature. The internal diameter is strictly controlled to minimize friction and prevent micro-arcing between the wire and the liner wall, which can lead to erratic arc characteristics. This 10-pack configuration ensures that maintenance teams have an adequate supply of critical spares on hand, facilitating continuous operation in high-throughput industrial environments. Compatibility is strictly focused on the Dura-Flux line, ensuring precise fitment and gas-tight (where applicable) or fume-tight seals within the gun head assembly.<\/p>","product_description_text":"Technical Overview of the Bernard QJL-564 Jump Liner\nThe Bernard QJL-564 Jump Liner is a specialized consumable component engineered for high-amperage, heavy-duty welding applications utilizing the Bernard Dura-Flux gun series. Specifically designed to accommodate 5\/64-inch (approximately 1.98mm) welding wire, this liner is critical for maintaining electrical conductivity and smooth wire delivery in self-shielded flux-cored arc welding (FCAW-S) processes. The \"gasless\" designation indicates its optimization for open-arc welding environments where external shielding gas is not required, a common scenario in structural steel erection and heavy equipment repair.\n\nJump liners, such as the QJL-564, serve a vital mechanical function within the MIG gun assembly. Located within the gooseneck (or neck) of the torch, the jump liner bridges the gap between the main conduit liner and the contact tip. This section of the gun is subject to the most extreme heat and the tightest bend radius, causing accelerated wear compared to the rest of the liner system. By utilizing a segmented liner approach, Bernard allows operators to replace only this sacrificial section, preserving the integrity of the main liner and significantly reducing maintenance costs and changeover time.\n\nManufactured from high-grade coiled steel, the QJL-564 provides the necessary rigidity to prevent wire buckling while maintaining enough flexibility to navigate the neck's curvature. The internal diameter is strictly controlled to minimize friction and prevent micro-arcing between the wire and the liner wall, which can lead to erratic arc characteristics. This 10-pack configuration ensures that maintenance teams have an adequate supply of critical spares on hand, facilitating continuous operation in high-throughput industrial environments. Compatibility is strictly focused on the Dura-Flux line, ensuring precise fitment and gas-tight (where applicable) or fume-tight seals within the gun head assembly.","suggested_attributes":[{"name":"Brand","values":["Bernard (bernard)"]},{"name":"Item","values":["Liner (liner)"]},{"name":"Packaging","values":["pack of 10 (pack-of-10)"]},{"name":"Wire Type","values":["Flux Core or Metal Core (flux-core-or-metal-core)"]}],"extra_attributes":[{"name":"Wire Diameter","values":["5\/64\""]},{"name":"Compatible Guns","values":["Bernard Dura-Flux"]},{"name":"Liner Type","values":["Jump Liner"]},{"name":"Process","values":["Gasless \/ Self-Shielded FCAW"]}],"suggested_pretty_url":"bernard-qjl-564-jump-liner-5-64-gasless-10-pack","predecessor":"null","releaseYear":2010,"releaseYearGuess":2010,"successor":"null","features":["Designed specifically for 5\/64-inch (approx. 2.0 mm) welding wire","Optimized for gasless, self-shielded flux-cored arc welding (FCAW-S)","Compatible with Bernard Dura-Flux series MIG guns","Jump liner configuration allows for quick replacement in the gun neck","Durable steel construction withstands high heat and abrasion","Reduces downtime by eliminating the need to replace the full-length liner for neck wear","Ensures smooth wire feeding in heavy-duty industrial applications","Supplied in a convenient package of 10 liners"],"applications":"
Structural Steel Erection<\/li>
Heavy Equipment Repair and Maintenance<\/li>
Bridge and Infrastructure Construction<\/li>
Shipbuilding (Flux-Cored Applications)<\/li>
General Heavy Fabrication using Self-Shielded Wire<\/li><\/ul>","includes":"
10 x Bernard QJL-564 Jump Liners (5\/64\")<\/li><\/ul>","faqs":[{"question":"What wire diameter is the QJL-564 designed for?","answer":"The QJL-564 is designed specifically for 5\/64-inch (approx. 2.0 mm) welding wire.","type":"JOSEF GAS"},{"question":"Is this liner compatible with gas-shielded MIG welding?","answer":"This liner is designated as 'Gasless', meaning it is optimized for self-shielded flux-cored applications, typically used with Bernard Dura-Flux guns.","type":"JOSEF GAS"},{"question":"What is the primary advantage of using a jump liner?","answer":"A jump liner allows for the replacement of the liner section in the gun neck—where the most wear occurs—without needing to replace the entire gun liner, saving time and material costs.","type":"WELDERS"},{"question":"How many liners are included in this package?","answer":"This product is a package of 10 jump liners.","type":"WELDERS"},{"question":"Which MIG guns does the QJL-564 fit?","answer":"It is designed for use with Bernard Dura-Flux series welding guns.","type":"JOSEF GAS"},{"question":"Can I use this liner for smaller wire sizes like .045?","answer":"It is not recommended. Using a liner significantly larger than the wire diameter can cause poor electrical contact and erratic wire feeding. You should use a liner matched to your wire size.","type":"WELDERS"},{"question":"Is this an OEM Bernard part?","answer":"Yes, the QJL-564 is a genuine Bernard product.","type":"JOSEF GAS"},{"question":"What material is the liner made from?","answer":"It is made from durable coiled steel suitable for heavy-duty flux-cored wires.","type":"WELDERS"}]}"
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Technical Overview of the Bernard QJL-564 Jump Liner<\/h2>\n
The Bernard QJL-564 Jump Liner is a specialized consumable component engineered for high-amperage, heavy-duty welding applications utilizing the Bernard Dura-Flux gun series. Specifically designed to accommodate 5\/64-inch (approximately 1.98mm) welding wire, this liner is critical for maintaining electrical conductivity and smooth wire delivery in self-shielded flux-cored arc welding (FCAW-S) processes. The \"gasless\" designation indicates its optimization for open-arc welding environments where external shielding gas is not required, a common scenario in structural steel erection and heavy equipment repair.<\/p>\n\n
Jump liners, such as the QJL-564, serve a vital mechanical function within the MIG gun assembly. Located within the gooseneck (or neck) of the torch, the jump liner bridges the gap between the main conduit liner and the contact tip. This section of the gun is subject to the most extreme heat and the tightest bend radius, causing accelerated wear compared to the rest of the liner system. By utilizing a segmented liner approach, Bernard allows operators to replace only this sacrificial section, preserving the integrity of the main liner and significantly reducing maintenance costs and changeover time.<\/p>\n\n
Manufactured from high-grade coiled steel, the QJL-564 provides the necessary rigidity to prevent wire buckling while maintaining enough flexibility to navigate the neck's curvature. The internal diameter is strictly controlled to minimize friction and prevent micro-arcing between the wire and the liner wall, which can lead to erratic arc characteristics. This 10-pack configuration ensures that maintenance teams have an adequate supply of critical spares on hand, facilitating continuous operation in high-throughput industrial environments. Compatibility is strictly focused on the Dura-Flux line, ensuring precise fitment and gas-tight (where applicable) or fume-tight seals within the gun head assembly.<\/p>","product_description_text":"Technical Overview of the Bernard QJL-564 Jump Liner\nThe Bernard QJL-564 Jump Liner is a specialized consumable component engineered for high-amperage, heavy-duty welding applications utilizing the Bernard Dura-Flux gun series. Specifically designed to accommodate 5\/64-inch (approximately 1.98mm) welding wire, this liner is critical for maintaining electrical conductivity and smooth wire delivery in self-shielded flux-cored arc welding (FCAW-S) processes. The \"gasless\" designation indicates its optimization for open-arc welding environments where external shielding gas is not required, a common scenario in structural steel erection and heavy equipment repair.\n\nJump liners, such as the QJL-564, serve a vital mechanical function within the MIG gun assembly. Located within the gooseneck (or neck) of the torch, the jump liner bridges the gap between the main conduit liner and the contact tip. This section of the gun is subject to the most extreme heat and the tightest bend radius, causing accelerated wear compared to the rest of the liner system. By utilizing a segmented liner approach, Bernard allows operators to replace only this sacrificial section, preserving the integrity of the main liner and significantly reducing maintenance costs and changeover time.\n\nManufactured from high-grade coiled steel, the QJL-564 provides the necessary rigidity to prevent wire buckling while maintaining enough flexibility to navigate the neck's curvature. The internal diameter is strictly controlled to minimize friction and prevent micro-arcing between the wire and the liner wall, which can lead to erratic arc characteristics. This 10-pack configuration ensures that maintenance teams have an adequate supply of critical spares on hand, facilitating continuous operation in high-throughput industrial environments. Compatibility is strictly focused on the Dura-Flux line, ensuring precise fitment and gas-tight (where applicable) or fume-tight seals within the gun head assembly.","suggested_attributes":[{"name":"Brand","values":["Bernard (bernard)"]},{"name":"Item","values":["Liner (liner)"]},{"name":"Packaging","values":["pack of 10 (pack-of-10)"]},{"name":"Wire Type","values":["Flux Core or Metal Core (flux-core-or-metal-core)"]}],"extra_attributes":[{"name":"Wire Diameter","values":["5\/64\""]},{"name":"Compatible Guns","values":["Bernard Dura-Flux"]},{"name":"Liner Type","values":["Jump Liner"]},{"name":"Process","values":["Gasless \/ Self-Shielded FCAW"]}],"suggested_pretty_url":"bernard-qjl-564-jump-liner-5-64-gasless-10-pack","predecessor":"null","releaseYear":2010,"releaseYearGuess":2010,"successor":"null","features":["Designed specifically for 5\/64-inch (approx. 2.0 mm) welding wire","Optimized for gasless, self-shielded flux-cored arc welding (FCAW-S)","Compatible with Bernard Dura-Flux series MIG guns","Jump liner configuration allows for quick replacement in the gun neck","Durable steel construction withstands high heat and abrasion","Reduces downtime by eliminating the need to replace the full-length liner for neck wear","Ensures smooth wire feeding in heavy-duty industrial applications","Supplied in a convenient package of 10 liners"],"applications":"
Structural Steel Erection<\/li>
Heavy Equipment Repair and Maintenance<\/li>
Bridge and Infrastructure Construction<\/li>
Shipbuilding (Flux-Cored Applications)<\/li>
General Heavy Fabrication using Self-Shielded Wire<\/li><\/ul>","includes":"
10 x Bernard QJL-564 Jump Liners (5\/64\")<\/li><\/ul>","faqs":[{"question":"What wire diameter is the QJL-564 designed for?","answer":"The QJL-564 is designed specifically for 5\/64-inch (approx. 2.0 mm) welding wire.","type":"JOSEF GAS"},{"question":"Is this liner compatible with gas-shielded MIG welding?","answer":"This liner is designated as 'Gasless', meaning it is optimized for self-shielded flux-cored applications, typically used with Bernard Dura-Flux guns.","type":"JOSEF GAS"},{"question":"What is the primary advantage of using a jump liner?","answer":"A jump liner allows for the replacement of the liner section in the gun neck—where the most wear occurs—without needing to replace the entire gun liner, saving time and material costs.","type":"WELDERS"},{"question":"How many liners are included in this package?","answer":"This product is a package of 10 jump liners.","type":"WELDERS"},{"question":"Which MIG guns does the QJL-564 fit?","answer":"It is designed for use with Bernard Dura-Flux series welding guns.","type":"JOSEF GAS"},{"question":"Can I use this liner for smaller wire sizes like .045?","answer":"It is not recommended. Using a liner significantly larger than the wire diameter can cause poor electrical contact and erratic wire feeding. You should use a liner matched to your wire size.","type":"WELDERS"},{"question":"Is this an OEM Bernard part?","answer":"Yes, the QJL-564 is a genuine Bernard product.","type":"JOSEF GAS"},{"question":"What material is the liner made from?","answer":"It is made from durable coiled steel suitable for heavy-duty flux-cored wires.","type":"WELDERS"}]}"
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OVERVIEW
Technical Overview of the Bernard QJL-564 Jump Liner
The Bernard QJL-564 Jump Liner is a specialized consumable component engineered for high-amperage, heavy-duty welding applications utilizing the Bernard Dura-Flux gun series. Specifically designed to accommodate 5/64-inch (approximately 1.98mm) welding wire, this liner is critical for maintaining electrical conductivity and smooth wire delivery in self-shielded flux-cored arc welding (FCAW-S) processes. The "gasless" designation indicates its optimization for open-arc welding environments where external shielding gas is not required, a common scenario in structural steel erection and heavy equipment repair.
Jump liners, such as the QJL-564, serve a vital mechanical function within the MIG gun assembly. Located within the gooseneck (or neck) of the torch, the jump liner bridges the gap between the main conduit liner and the contact tip. This section of the gun is subject to the most extreme heat and the tightest bend radius, causing accelerated wear compared to the rest of the liner system. By utilizing a segmented liner approach, Bernard allows operators to replace only this sacrificial section, preserving the integrity of the main liner and significantly reducing maintenance costs and changeover time.
Manufactured from high-grade coiled steel, the QJL-564 provides the necessary rigidity to prevent wire buckling while maintaining enough flexibility to navigate the neck's curvature. The internal diameter is strictly controlled to minimize friction and prevent micro-arcing between the wire and the liner wall, which can lead to erratic arc characteristics. This 10-pack configuration ensures that maintenance teams have an adequate supply of critical spares on hand, facilitating continuous operation in high-throughput industrial environments. Compatibility is strictly focused on the Dura-Flux line, ensuring precise fitment and gas-tight (where applicable) or fume-tight seals within the gun head assembly.
Additional Information
Item:Liner (liner), Inlet Guide
Packaging:pack of 10 (pack-of-10)
Wire Type:Flux Core or Metal Core (flux-core-or-metal-core)
Wire Diameter:5/64"
Compatible Guns:Bernard Dura-Flux
Liner Type:Jump Liner
Process:Gasless / Self-Shielded FCAW
----- new values below ----
Wire Diameter:5/64"
Compatible Guns:Bernard Dura-Flux
Liner Type:Jump Liner
Process:Gasless / Self-Shielded FCAW
Brand:Bernard (bernard)
Item:Liner (liner)
Packaging:pack of 10 (pack-of-10)
Wire Type:Flux Core or Metal Core (flux-core-or-metal-core)
INCLUDED
10 x Bernard QJL-564 Jump Liners (5/64")
APPLICATIONS
Structural Steel Erection
Heavy Equipment Repair and Maintenance
Bridge and Infrastructure Construction
Shipbuilding (Flux-Cored Applications)
General Heavy Fabrication using Self-Shielded Wire
FAQ
The QJL-564 is designed specifically for 5/64-inch (approx. 2.0 mm) welding wire.
This liner is designated as 'Gasless', meaning it is optimized for self-shielded flux-cored applications, typically used with Bernard Dura-Flux guns.
A jump liner allows for the replacement of the liner section in the gun neck—where the most wear occurs—without needing to replace the entire gun liner, saving time and material costs.
This product is a package of 10 jump liners.
It is designed for use with Bernard Dura-Flux series welding guns.
It is not recommended. Using a liner significantly larger than the wire diameter can cause poor electrical contact and erratic wire feeding. You should use a liner matched to your wire size.
Yes, the QJL-564 is a genuine Bernard product.
It is made from durable coiled steel suitable for heavy-duty flux-cored wires.
