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What the factory can make, and how it checks it

Your parts are made by LIYONGJU Precision Spring in the Suzhou High-Tech Zone, a certified spring manufacturer since 2016. Here are the machines, size ranges and tests behind every order.

Production equipment

Size ranges by machine

Use this table to check whether your wire or strip size fits. If you're close to a limit, send the drawing anyway and the engineers will confirm.

Machine	Round wire	Strip thickness	Strip width
CNC spring forming machine	Ø2.5–13 mm	0.1–8.0 mm	0.1–30 mm
Plate / wire forming machine	Ø0.1–2.5 mm	0.1–2.5 mm	0.2–30 mm
CNC spring machine	Ø0.2–2.0 mm	0.2–1.0 mm	0.2–15 mm
Forming machine	Ø0.1–1.0 mm	0.1–0.8 mm	0.2–20 mm
Compression spring machine	Ø0.08–5.0 mm	—	—

Also in-house: a continuous hot-air tempering furnace (50–500 °C) for stress relief, and an M02-4 spring end grinder for square, flat ends.

CNC spring forming machine — CNC spring formingMulti-axis, wire and strip

Compression spring coiling machine — Compression coilerWire Ø0.08–5.0 mm

Plate and wire forming machine — Plate / wire formingWire and strip up to 2.5 mm

CNC spring machine on the workshop floor — CNC spring machineFine wire and strip

Spring forming machines in the LIYONGJU workshop

Engineering

From a drawing, or from a problem

The factory works both ways. Under OEM, it makes your part exactly to your print. Under ODM, its engineers start from your load, travel and space, then propose the material, the geometry and the process.