Stitch Length Regulator - China Stitch Length Regulator Manufacturers Suppliers Factory

Your Leading Stitch Length Regulator Supplier

Zhejiang Jiaxing Precision Technology Co.,Ltd. is a professional manufacturer specializing in sewing machine parts and precision components. Our range of sewing machine adjustment & control parts is comprehensive, including stitch length regulator, presser foot lifter, pressure adjustment screw & nut, sewing machine head support, and knee lifter rod. These products are widely used in industrial and household sewing machines, textile automation equipment, and related precision machinery.

842 8420 Stitch Regulator Dial 1-5
Compatible Models:Suitable for 842 and 8420 models.
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The stitch length regulator is a core adjustment component used in industrial sewing machines to control stitch length, stitch density, and sewing performance. By rotating the adjustment dial,
842/8420 stitch regulator dial 1-7
Suitable for 842, 8420 and other models.

Why Choose Us

Rich Experience

With nearly 20 years of experience in sewing machine parts manufacturing, we supply components to well-known machine manufacturers in multiple regions.

Advanced Equipment

We operate complete in-house production with CNC machining, injection molding, and automated assembly, ensuring stable quality and consistent precision for large-volume orders.

OEM & ODM Available

We offer OEM and ODM services based on drawings or samples, supporting mold development, trial production, and scalable manufacturing for different sewing machine applications.

Parameter of Stitch Length Regulator

Specification	Description
Product Name	Stitch Length Regulator
Material	Highstrength steel or alloy
Surface Finish	Corrosionresistant coating
Weight	Approx. 0.03–0.09 kg
Adjustment Range	~0.5–6.0 mm per stitch length setting
Mounting Type	Precision drilled mounting points
Compatibility	Industrial lockstitch and similar machines
Control Method	Knob or lever driven adjustment
Tolerance	Precision machined for accurate settings

Ordering Process

Inquiry & Requirement Review

Buyers send drawings, samples, or specifications, and our team reviews technical details, materials, and application requirements.

Technical Evaluation & Quotation

We evaluate production feasibility, confirm processes and tolerances, and provide a clear quotation with lead time.

Sample Development & Approval

If required, we produce trial samples or prototypes for testing and confirmation before mass production.

Order Confirmation & Production

After sample approval, the order is confirmed and scheduled for in-house production under strict quality control.

Quality Inspection & Packaging

All products undergo inspection to ensure consistency, accuracy, and safe packaging for international shipment.

Delivery & After-Sales Support

We arrange shipment and provide ongoing support for any technical or quality-related inquiries after delivery.

Functions of Stitch Length Regulator

Precise Scale Indication

The scale of the 842 8420 Stitch Regulator Dial 1-5 covers the 1-5mm range, with each gear scale accurately corresponding to the actual movement amplitude of the needle bar (error ≤±0.08mm), which can intuitively match the fine sewing needs such as thin material overlocking and cotton fabric binding.

Linkage Adjustment Compatibility

It accurately engages with the transmission teeth of the stitch length knob; when the knob rotates, the pointer of the dial moves synchronously to achieve "adjustment-indication" synchronization, avoiding stitch length adjustment deviations and ensuring uniform stitching in multiple sections.

Durable and Easy to Identify

Produced by two-color injection molding, it is resistant to sewing machine oil corrosion and does not fall off; the edge is equipped with a positioning buckle, which fits closely with the machine body, has no loosening during high-speed operation, and the scale can be clearly identified even in low-light environments.

Common Materials of Stitch Length Regulator

High‑strength steel

High Carbon Steel: Extremely hard and strong but more brittle and harder to machine.

Alloy

An alloy is a metal made by combining two or more elements, at least one of which is a metal. The purpose of alloying is to enhance specific properties like strength, corrosion resistance, heat tolerance, or machinability.
Common examples include:

Alloy Steel (iron + chromium, nickel, molybdenum, etc.)
Aluminum Alloys (aluminum + magnesium, zinc, silicon)
Titanium Alloys (titanium + vanadium, aluminum)
Zinc Alloys (zinc + copper, aluminum, magnesium)
Copper Alloys (brass, bronze)

Applicable Models of Stitch Length Regulator

842 Series Stitch Length Control 1-7
The 842 Series Stitch Length Control 1-7 is an exclusive scale component for wide stitch length sewing of 842/8420 models. Working in coordination with the stitch length knob, it provides precise visual reference for 1-7mm stitch lengths, focusing on enhancing the identification of gear positions suitable for thick materials, and helping to control the stitch length of thick material splicing and leather pressing. The 842 Series Stitch Length Control 1-7 is optimized for heavy-duty sewing scenarios.

842 8420 Stitch Regulator Dial 1-5
The 842 8420 Stitch Regulator Dial 1-5 is the core visual auxiliary component for stitch length adjustment of 842/8420 models, used in conjunction with the stitch length knob. It provides precise scale reference for 1-5mm fine stitch lengths, serving as a key accessory to ensure consistent stitch spacing for thin material sewing. The 842 8420 Stitch Regulator Dial 1-5 is specifically engineered to meet the delicate sewing needs of light fabrics.

Our Service Advantages

Pre-sales Service

We assist customers by reviewing technical requirements, materials, and applications, and provide solution advice, product selection support, and trial samples when required.

In-sales Service

We provide clear updates on production and delivery status, adjust schedules when necessary, and support shipping and export procedures.

After-sales Service

We offer repair or replacement during the warranty period and provide paid service support after warranty.

Payment Terms

T.T with 30% downpayment, 70%before shipment.
Paypal or West Union also accept.

Packing & Transportation

productcate-552-379

FAQ

Q: How does a stitch length regulator affect finished products?

A: A stitch length regulator sets the distance between stitches, allowing manufacturers to tailor stitch density for different fabrics and end‑use requirements in industrial sewing.

Q: Can a stitch length regulator improve production flexibility?

A: Yes, a properly matched stitch length regulator lets operators change stitch length quickly between jobs, improving adaptability across diverse sewing tasks.

Q: Does a stitch length regulator need frequent replacement?

A: A quality stitch length regulator made with durable materials and precision machining can maintain adjustment accuracy over long production runs with minimal replacements.

Q: How does a stitch length regulator enhance sewing accuracy?

A: By giving precise control over stitch length, a stitch length regulator minimizes variation and helps maintain consistent stitch patterns during repetitive sewing operations.

Q: Is installation of a stitch length regulator difficult?

A: A well‑designed stitch length regulator installs using standard mounting points and tools, enabling easy replacement or service by technicians.

Q: What impact does a stitch length regulator have on different fabrics?

A: A stitch length regulator allows adjustment for delicate or heavy fabrics, ensuring optimal stitch formation and preventing fabric distortion.

Q: How often should the stitch length regulator settings be checked?

A: Regularly check the stitch length regulator settings during shift changes to confirm accurate stitch output and avoid quality drift in production.

As one of the leading stitch length regulator manufacturers and suppliers in China, our products have good reputation in the market. Please rest assured to wholesale high quality stitch length regulator at competitive price from our factory. Contact us for more details.

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