YU JYUN
YU JYUN
YU JYUN PRECISION SCREW PARTS CO., LTD. has specialized in precision ball plunger (also known as spring plunger) manufacturing for over twelve years. With Swiss-type CNC complex machining as our core competence, we deliver high-quality precision components to clients worldwide.
Our core advantage lies in the philosophy of "single-pass manufacturing." Through Swiss-type CNC machines, body turning, drilling, threading, and chamfering are completed in a single clamping operation, eliminating the cumulative tolerances common in secondary processing. This commitment to precision allows our ball plungers to meet the most demanding requirements in mold making, automation equipment, jigs, and fixtures — particularly in dimensional consistency, load stability, and service life.
Our product line covers Standard, Press-Fit, and Flanged ball plungers in diameters from M3 to M16 and lengths from 3 mm to 40 mm. For customization, we accept flexible orders ranging from a single prototype to volume production of 2,000 pieces or more, helping clients quickly validate designs in early R&D stages.
From raw material selection, machining, to final inspection, Yu Jyun has established a comprehensive quality control process where dedication and care are invested at every step. We believe that true precision lies not only in dimensions, but in every link being trustworthy.
Make Yu Jyun your trusted partner for precision sourcing.
Four core strengths to make your component sourcing more confident.
Swiss-type CNC machines complete the body in one operation, ensuring exceptional product consistency.
Rigorous QC processes ensure every product meets your specifications for precision and durability.
Flexible production runs of any size, from a single prototype to volume orders, fitting your unique needs.
Efficient production and stock management ensure on-time delivery, every order.
A comprehensive range of standard and customized ball plungers for diverse industrial applications.
Diameter M3 ~ M16
Customizable thread & length
Threadless, secured by press-fitting
Ideal for jigs & mold positioning
Hex socket with flange
High accuracy, uniform force distribution
Selected custom production cases showcasing our craftsmanship.
Yu Jyun is dedicated to elevating production efficiency and product precision. Our core competency lies in Swiss-type CNC complex machining, achieving low-tolerance single-pass machining and eliminating issues commonly found in secondary processing.
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