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Pfaff 1245 Industrial Sewing Machine: Troubleshooting Guide
Quick answer: Most Pfaff 1245 issues like skipped stitches, thread breakage, or poor stitch quality can be resolved by checking the needle, rethreading the machine, adjusting tension, or inspecting/replacing the rotary hook or needle plate. Regular cleaning and lubrication are key to prevention.
The Pfaff 1245 series is a robust and reliable industrial sewing machine, a workhorse for many workshops. However, like any precision equipment, it can encounter issues. This guide provides common troubleshooting steps for operators to diagnose and fix the most frequent problems, helping you get back to sewing quickly. We focus on practical, actionable advice and identify the parts most commonly involved, which we stock at 360 Digitizing Shop.
Two-minute checks before you open anything
- Is the machine threaded correctly, both upper and bobbin?
- Is the needle new, inserted correctly, and the right type/size?
- Are the tension settings appropriate for your thread and fabric?
- Is there any lint or thread jammed in the bobbin case or under the needle plate?
- Is the machine adequately lubricated?
1. Skipped Stitches or Poor Stitch Quality high likelihood
How to tell
Stitches are missing, irregular, or form loops on the top or bottom of the fabric. The seam may appear loose or uneven.
Fix
- Replace the needle with a new, correct size and type for your material. Ensure it's inserted correctly and fully seated.
- Completely rethread the machine, ensuring the thread is properly seated in all guides and tension discs.
- Adjust the upper and bobbin thread tension. Start with small adjustments and test on scrap fabric.
- Inspect the rotary hook for burrs, nicks, or damage. Clean out any lint or thread jams around the hook area.
- Check the needle plate and feed dog for damage or wear that could interfere with stitch formation. Replace if necessary.
- Verify the hook timing. If the hook point is not meeting the needle at the correct position, it will cause skipped stitches. This may require a technician or advanced adjustment.
Consider replacing the PFAFF 91-026746-04C Needle Plate & 91-026745-04C Feed Dog Set if damaged. For rotary hook issues, compatible parts include HPF-1242(A) Rotary Hook + Cap ASM, HPF-1242(A) Rotary Hook 91-140539-91W/O CAP, HPF-1242TR Rotary Hook, Koban KRT1242-S HPF-1242 91-140539-91 Rotary Hook, KOBAN 91-140538-91 KRT1242-S Rotary Hook, or Fu Chao SKRT1242-S 91-140538-91 Rotary Hook.
Parts involved: Needles & needle bars → Thread path & tension → Rotary hooks & bobbin cases → Presser feet & sewing parts → Lubrication & maintenance →
2. Thread Breakage high likelihood
How to tell
The upper or bobbin thread repeatedly snaps during sewing, often leaving a tangled mess or stopping the machine.
Fix
- Check the entire thread path for any sharp edges, burrs, or obstructions that could be fraying the thread. Smooth or replace any damaged components.
- Ensure the thread is correctly wound on the bobbin and that the bobbin case is free of lint or damage. Replace the Pfaff 91-140253-05 Bobbin Case Opener if it's worn.
- Reduce upper thread tension slightly. High tension can put excessive strain on the thread.
- Replace the needle. A bent, dull, or incorrect needle can cause thread to break.
- Inspect the needle plate and feed dog for nicks or rough spots where the thread might catch. Replace the PFAFF 91-026746-04C Needle Plate & 91-026745-04C Feed Dog Set if damaged.
- Clean the rotary hook area thoroughly. Accumulated lint or thread can cause friction and lead to breakage. Check the hook for burrs.
Consider a new needle, a smooth bobbin case, or a replacement PFAFF 91-026746-04C Needle Plate & 91-026745-04C Feed Dog Set. If the rotary hook is damaged, refer to the compatible hook parts listed under 'Skipped Stitches'.
Parts involved: Thread path & tension → Needles & needle bars → Rotary hooks & bobbin cases → Presser feet & sewing parts → Lubrication & maintenance →
Parts you may need for Pfaff
In stock, tested before dispatch, Buyer Protection on every order. Part types for this problem: Needles & needle bars, Thread path & tension, Rotary hooks & bobbin cases, Presser feet & sewing parts.
Flying Tiger HAX1 15x1 Sewing Machine Needles 100-Pack for Brother ...$ 13.99View part →
PFAFF 335H, 335, 335G Needle Plate, Feed Dog, Needle, Presser Foot,...$ 27.09View part →
Groz-Beckert B27 DCX27 81X1 FFG/SES Industrial Sewing Needles Nm 75...$ 37.49View part →
Groz-Beckert 134 DPX5 135X5 Industrial Sewing Needles 100-Pack for ...$ 39.29View part →
PFAFF 91-026746-04C Needle Plate & 91-026745-04C Feed Dog Set for 1...$ 36.09View part →
KRT470-R Rotary Hook for PFAFF 471-493, GOLDEN WHEEL 9910, 9920, 88...$ 33.99View part →All Pfaff parts → Needles & Needle Bars → Thread Path & Tension → Rotary Hooks & Bobbin Cases →
3. Needle Breakage medium likelihood
How to tell
The needle snaps during sewing, often with a loud sound. This can damage the needle plate or rotary hook.
Fix
- Ensure the correct needle type and size are being used for the fabric and thread. Industrial machines require specific needle systems.
- Verify the needle is inserted correctly, fully seated, and facing the right direction.
- Check the needle plate for any previous damage or enlarged needle hole. Replace the PFAFF 91-026746-04C Needle Plate if it has a damaged hole.
- Inspect the presser foot. If it's loose, bent, or the wrong type (e.g., Left & Right Toe Zipper Binding Feet Set), it can cause the needle to strike it.
- Check the hook timing. If the hook is out of time, it can strike the needle, causing it to break. This requires precise adjustment, often by a technician.
- Ensure the fabric is not being pulled or pushed excessively while sewing, which can deflect the needle.
Ensure you are using the correct needle. Inspect the PFAFF 91-026746-04C Needle Plate for damage. Check your presser feet, such as the Left & Right Toe Zipper Binding Feet Set, for proper alignment and condition. A damaged rotary hook (e.g., HPF-1242(A) Rotary Hook) can also contribute.
Parts involved: Needles & needle bars → Presser feet & sewing parts → Rotary hooks & bobbin cases → Screws, springs & small parts →
4. Machine Jamming or Seizing medium likelihood
How to tell
The machine stops abruptly, often with a grinding noise, and the handwheel becomes difficult or impossible to turn.
Fix
- Immediately turn off the machine. Remove the needle and presser foot.
- Clear any tangled thread from the bobbin area, under the needle plate, and around the rotary hook. This is the most common cause.
- Inspect the rotary hook for any foreign objects, thread jams, or damage. Clean thoroughly.
- Check for any loose screws or parts that may have fallen into the mechanism. Ensure the Pfaff 91-000824-25 Binder Bracket Plate Mounting Screw is secure if applicable.
- Lubricate the machine according to the manufacturer's manual. Lack of lubrication can cause parts to seize.
- If the machine remains seized after clearing visible obstructions, there may be an internal mechanical issue requiring a technician.
A damaged rotary hook (e.g., HPF-1242(A) Rotary Hook) can cause jamming. Ensure all screws like the Pfaff 91-000824-25 Binder Bracket Plate Mounting Screw are tight. Regular lubrication is crucial.
Parts involved: Rotary hooks & bobbin cases → Lubrication & maintenance → Screws, springs & small parts → Head & mechanical parts →
Maintenance schedule
| When | What to do | Why |
|---|---|---|
| Daily (or every 8 hours of use) | Clean lint from bobbin area, feed dogs, and tension discs. | Prevents thread jams, skipped stitches, and ensures smooth operation. |
| Daily (or every 8 hours of use) | Oil all designated lubrication points. | Reduces friction, prevents wear, and ensures smooth, quiet machine function. |
| Weekly | Inspect needle plate, feed dogs, and presser foot for wear or damage. | Early detection of wear prevents stitch quality issues and needle breakage. |
| Monthly | Thoroughly clean the entire machine, including hard-to-reach areas around the rotary hook. | Removes accumulated debris that can cause mechanical issues and thread problems. |
| Annually (or every 2000 hours of use) | Professional servicing and timing check. | Ensures optimal performance, extends machine life, and addresses potential issues before they become major problems. Confirm specific intervals with your machine's manual. |
Stop and call a technician if
- If the machine is completely seized and cannot be freed after clearing visible obstructions and lubricating.
- If you suspect internal timing issues (e.g., hook timing, needle bar timing) that you are not comfortable adjusting.
- If there is significant damage to major components like the main shaft, motor, or electronic controls.
- If you've performed all troubleshooting steps and the problem persists, indicating a deeper mechanical or electrical fault.
Prevent it coming back
- Perform daily cleaning: Remove lint and thread scraps from the bobbin area, feed dogs, and tension discs.
- Lubricate regularly: Follow the manufacturer's recommended oiling schedule and use the specified oil type.
- Use correct needles: Always match the needle type and size to your fabric and thread for optimal performance and to prevent damage.
- Inspect parts regularly: Check the needle plate, feed dogs, presser foot, and rotary hook for wear, burrs, or damage.
- Use quality thread: Poor quality or old thread can lead to frequent breakages and skipped stitches.
- Avoid pulling fabric: Allow the feed dogs to move the fabric naturally; excessive pulling can bend needles or throw off timing.
Frequently asked questions
Why is my Pfaff 1245 making a grinding noise?
A grinding noise often indicates a lack of lubrication, a foreign object caught in the mechanism (especially around the rotary hook or feed dogs), or a loose/damaged gear. Stop the machine immediately, clean and lubricate it, and check for obstructions. If the noise persists, a technician should inspect it.
How often should I oil my Pfaff 1245?
The Pfaff 1245 is an industrial machine designed for heavy use. It typically requires daily oiling at designated points, or every few hours of continuous operation, depending on the intensity of use. Always refer to your machine's specific manual for precise lubrication schedules and oil types.
Can I use any needle in my Pfaff 1245?
No, industrial sewing machines like the Pfaff 1245 require specific needle systems (e.g., 134, 135x5, DPx5). Using the wrong type or size can lead to skipped stitches, thread breakage, needle breakage, and damage to the machine's hook or needle plate. Always use needles recommended for your Pfaff 1245 model.
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