The most common fixed bag-closing head in FIBC factories across the USA. Built for automated and semi-automated lines where precision and output consistency are critical.
Most Common FIBCFixed HeadChain StitchAutomatic FeedKnife Assembly
Technical data
Machine specifications
Key parameters — validate critical specs with your OEM documentation
Machine type
Fixed head
Inline / stationary
Stitch type
Chain stitch
Single-thread
Feed type
Automatic
Also hand feed variant
Thread cutter
Integrated
Upper + lower knife
Actuation
Air cylinder
Pneumatic — J01002
Looper system
Ball joint
Right + left assembly
Throat plates
3 variants
Hand / Auto / Single thread
Installation
Inline
Conveyor integration
Applications
Industries that rely on the DS-9C
Standard closing head for high-throughput industrial bag lines
📦
FIBC / Big Bags
Primary market. Inline closing on automated FIBC filling lines. The DS-9C is the default fixed head for most US FIBC manufacturers.
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Agriculture
High-volume grain, seed, and feed bag lines. Automatic feed reduces operator dependency on continuous production shifts.
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Chemicals & Minerals
Powder and granule bulk packaging. Knife assembly ensures clean thread cut — critical for contamination-sensitive products.
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Construction
Cement and aggregate bag lines. Fixed head handles abrasive materials with consistent stitch quality across high daily volumes.
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Industrial manufacturing
Any inline bagging operation requiring consistent speed and automatic thread cut. Integrates with conveyor and filling systems.
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Food & Feed
Sugar, flour, pet food. Automatic feed variant preferred for food-grade lines — reduces manual contact and maintains throughput.
Spare parts reference
Parts diagram — DS-9C
Hover over numbered points to identify parts · Click to view in the parts catalog
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On Demand
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All 27 parts — DS-9C
Field knowledge
Maintenance tips
Best practices for DS-9C fixed head operations
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Replace both feed dogs as a pair
Feed Dog Rear (104072) and Front (304131) wear at similar rates. Replacing only one creates uneven feed tension and inconsistent stitch quality. Always replace both simultaneously — monthly on high-volume lines.
Parts: 104072 · 304131
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Inspect looper drive system monthly
Looper (033121), Looper Drive Lever (303061), and Looper Drive Lever Rocker (303011) form a mechanical chain — wear in one accelerates wear in the others. Inspect all three together. Ball joints (063072AA / 063092AA) should be checked at the same interval.
Parts: 033121 · 303011 · 303061
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Sharpen or replace knives quarterly
The DS-9C's integrated knife assembly (Upper Knife 106053 + Lower Knife 106083) requires quarterly inspection. Dull knives cause ragged thread ends and potential jamming. The Cutter Connecting Rod (106141) should be inspected at the same time.
Parts: 106053 · 106083 · 106141
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Service air cylinder annually
The Air Cylinder (J01002) is the pneumatic actuator for the DS-9C's automatic feed. Check seals and air pressure annually. A degraded cylinder causes inconsistent feed timing — visible as irregular stitch spacing on the bag closing line.
Part: J01002
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Match throat plate to operation type
The DS-9C has 3 throat plate variants: Hand Feed (104093), Automatic Feed (104123), and Single Thread (304171). Running the wrong throat plate for your operation type is the most common cause of stitch skipping and thread breaks on this machine.
Parts: 104093 · 104123 · 304171
🛢️
Keep thread oiler filled
The Needle Thread Oiler (305401) is critical on the DS-9C for reducing friction heat at the needle on continuous-run operations. An empty oiler accelerates needle bar and looper wear. Check fill level at every shift change on 24h production lines.
Part: 305401
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