Jignasha Engineering Works

Part Function & Role

• The looper is a critical part in a chain-stitch sewing mechanism (especially in industrial/bag-closing machines). It helps form the loops that interlock with the needle thread to create the stitch. 

• In Newlong bag closing machines, the looper works together with the needle(s) to form a double-thread chain stitch (for some models). 

Compatibility / Fitment

• According to StitchSpares, the 773091 looper is “guaranteed to fit” on several Newlong models: DKN-3W, DKN-3AWGP8, DKN-3BP, and DN-2W.

• It’s also listed in parts catalogues for Newlong. 

• SewingPartsExpress lists the part under “Newlong Industrial Japan 773091 LoopeR.

Build / Material

• The looper is typically made from metal, likely steel or a hardened alloy, to withstand the stress and friction inside a high-speed closing machine. (Inferred from appearance / industrial-grade spare parts.)

• It has a pin / shaft portion for mounting (visible in the pictures), which helps secure it in the looper mechanism.

Design / Shape

• The design is a curved, hook-like shape — this helps the looper “catch” the needle thread and pull it into a loop.

• There are mounting holes / points visible (for securing to the looper mechanism).

• The part has a small cylindrical shaft / post (for alignment / attachment).

Operation

• In operation, the looper swings / moves in a timed fashion (driven by the machine’s cam / rocker / shaft) to meet the needle thread at just the right moment.

• Proper alignment (looper-to-needle) is essential; misalignment can cause skipped stitches, broken needles, or poor-quality stitches. 

• The looper must be kept clean and properly lubricated — industrial bag-closing machines often have oil-lubrication systems. 

Where to Buy / Part Info

• One listing: 773091 Looper (Newlong) from StitchSpares.

• According to that listing: SKU = RK06165, and it’s in stock. 

• Price (in that source) is relatively low (for a spare part), showing it’s a replaceable wear item. 

Other Notes

• Because this is a looper for industrial bag-sewing machines, it’s likely subject to wear, especially under heavy use. Replacing it periodically as part of maintenance is normal.

• When replacing, make sure the replacement looper’s specification (part number) exactly matches — using the wrong looper could mess up the stitch or damage machine components.

• he looper is a critical part in a chain-stitch sewing mechanism (especially in industrial/bag-closing machines). It helps form the loops that interlock with the needle thread to create the stitch

• In Newlong bag closing machines, the looper works together with the needle(s) to form a double-thread chain stitch (for some models).

Compatibility / Fitment

• According to StitchSpares, the 773091 looper is “guaranteed to fit” on several Newlong models: DKN-3W, DKN-3WGP8, DKN-3BP, and DN-2W.

• It’s also listed in parts catalogues for Newlong.

• SewingPartsExpress lists the part under “Newlong Industrial Japan 51108DA Looper.”

Build / Material

• The looper is typically made from metal, likely steel or a hardened alloy, to withstand the stress and friction inside a high-speed closing machine. (Inferred from appearance / industrial-grade spare parts.)

• It has a pin / shaft portion for mounting (visible in the pictures), which helps secure it in the looper mechanism.

Design / Shape

• The design is a curved, hook-like shape — this helps the looper “catch” the needle thread and pull it into a loop.

• There are mounting holes / points visible (for securing to the looper mechanism).

• The part has a small cylindrical shaft / post (for alignment / attachment).

Operation

• In operation, the looper swings / moves in a timed fashion (driven by the machine’s cam / rocker / shaft) to meet the needle thread at just the right moment.

• Proper alignment (looper-to-needle) is essential; misalignment can cause skipped stitches, broken needles, or poor-quality stitches.

• The looper must be kept clean and properly lubricated — industrial bag-closing machines often have oil-lubrication systems.

Where to Buy / Part Info

• One listing: 51108DA Looper (Newlong) from StitchSpares.

• According to that listing: and it’s in stock.

• Price (in that source) is relatively low (for a spare part), showing it’s a replaceable wear item.

Other Notes

 

• Because this is a looper for industrial bag-sewing machines, it’s likely subject to wear, especially under heavy use. Replacing it periodically as part of maintenance is normal.

• When replacing, make sure the replacement looper’s specification (part number) exactly matches — using the wrong looper could mess up the stitch or damage machine components.

Established in Year 2020 We JIGNASHA ENGINEERING WORKS , Manufacturer , Retailer , Trader of Festo Air Cylinder , JUKI Sewing Machine , Sewing Needles in Ahmedabad, Gujarat.

Established in Year 2020 We JIGNASHA ENGINEERING WORKS , Manufacturer , Retailer , Trader of Festo Air Cylinder , JUKI Sewing Machine , Sewing Needles in Ahmedabad, Gujarat.

Established in Year 2020 We JIGNASHA ENGINEERING WORKS , Manufacturer , Retailer , Trader of Festo Air Cylinder , JUKI Sewing Machine , Sewing Needles in Ahmedabad, Gujarat.

502HD SEWING MACHINE SPARE PARTS,
502HD SEWING MACHINE THROAT PLATE, FEED DOG, LOOPER, NEEDLE BAR.