Core Positioning
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.
Core Functions
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.
Core Material Advantages (Empowered by PC Material)
High Light Transmittance and Scratch Resistance
High surface hardness, no scratches after long-term contact, keeping the scale clearly visible;
Dimensional Stability and Anti-Deformation
Withstands temperature changes ≤55℃ during sewing machine operation, no scale offset caused by thermal expansion and contraction;
Chemical Corrosion Resistance
Resistant to sewing machine oil and fabric dye erosion, no yellowing or embrittlement during long-term use.
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