CNC Spring Former Exporters: Cam vs Camless Compared

If you are evaluating CNC spring former exporters for your production line, the first technical decision is usually cam versus camless. This choice shapes your tool changeover time, the spring geometries you can produce, and the wire diameter range your factory can cover. Below is a breakdown based on real machine specifications from the Dongzheng Spring Machine range, manufactured in Dongguan since 2004.

Why the Cam vs Camless Question Matters

A cam spring machine uses mechanical cams to control the feed, pitch, and cut movements. The mechanical synchronization is excellent for high-volume production of the same part. A camless spring former uses independent servo axes — typically 4 to 6 axes — controlled by software. This allows faster changeover between part numbers and more complex geometries such as progressive pitch springs, torsion arms, and wire forms with multiple bending planes.

In practice, most factories running both technologies use cam machines for repeat orders and camless machines for samples, small batches, and complex parts.

Dongzheng Machine Lineup: Specifications

Here is the full range currently produced at 150+ units per year capacity, with over 150 units already installed outside China across 15+ countries.

• HSM-CNC08 Spring coiling machine: 0.08 – 1.0 mm wire diameter

• HSM-CNC20 Cam Spring Machine: 0.2 – 2.0 mm wire diameter

• HSM-CNC30 Spring Coiling Machine: 0.8 – 3.0 mm wire diameter

• HSM-CNC40 Cam Spring Machine: 1.8 – 4.5 mm wire diameter

• HSM-CNC60 Cam Spring Machine: 2.0 – 6.0 mm, available in two variants — with or without wire rotary

• HSM-CNC1008 Camless Spring Machine: 0.1 – 1.0 mm wire diameter

• HSM-CNC1025 Camless Spring Machine: 0.2 – 2.5 mm wire diameter

• HSM-CNC1045 Camless Spring Machine with wire rotary: 1.8 – 4.5 mm wire diameter

The HSM-CNC20 is the flagship — over 100 units are in operation worldwide, including 40+ units in Vietnam, 10+ in Brazil, and 5+ each in Indonesia and South Korea.

Specification Comparison Table

Model	Type	Wire Diameter (mm)	Notes
HSM-CNC08	Cam	0.08 – 1.0	Micro wire, electronics
HSM-CNC20	Cam	0.2 – 2.0	Flagship, 100+ global units
HSM-CNC30	Cam	0.8 – 3.0	Mid-range compression
HSM-CNC40	Cam	1.8 – 4.5	Heavy-duty compression
HSM-CNC60	Cam	2.0 – 6.0	Two variants: with/without wire rotary
HSM-CNC1008	Camless	0.1 – 1.0	Small wire, complex geometry
HSM-CNC1025	Camless	0.2 – 2.5	General purpose camless
HSM-CNC1045	Camless	1.8 – 4.5	Camless with wire rotary

Selection Logic by Wire Diameter

The cleanest way to narrow down the choice is to start with the wire diameter you actually run most days.

• Below 0.2 mm: HSM-CNC08 or HSM-CNC1008

• 0.2 – 1.0 mm: HSM-CNC20 (cam) or HSM-CNC1008 / HSM-CNC1025 (camless)

• 1.0 – 2.5 mm: HSM-CNC20, HSM-CNC30, or HSM-CNC1025

• 2.5 – 4.5 mm: HSM-CNC40 or HSM-CNC1045

• Above 4.5 mm up to 6.0 mm: HSM-CNC60

If your production mix includes copper wire wire bender machine for car parts — typically 1.0 to 3.0 mm copper or copper-coated steel for terminal springs, battery contact springs, and seat belt torsion springs — the HSM-CNC20 or HSM-CNC1025 usually hits the sweet spot.

What Real Customers Report

A few data points from long-term users:

• Vietnam, customer since 2010 running HSM-CNC20: after 8 months on the machine, daily output increased by 35%, with spring accuracy holding at ±0.01 mm consistently.

• Brazil, 2022 purchase of 2 HSM-CNC20 units: the customer has never activated the WeChat service group for repairs. Zero service tickets logged to date.

• Shenzhen, 2026 purchase of 2 HSM-CNC20 plus 1 HSM-CNC08: the customer's setup technician — who has used machines from many other brands at previous factories — specifically requested Dongzheng, citing machine stability, durability, and ease of setup adjustment.

• Vietnam, March 2026: customer purchased 1 HSM-CNC20 after seeing Dongzheng machines at another factory. Compared the stability of HSM output to their existing equipment, and chose to replace rather than add.

Decision Framework

Three questions usually lock in the choice:

1. Is your part library dominated by one or two SKUs running for months? A cam machine is faster and cheaper per part.

2. Do you run 20+ active SKUs with frequent changeover? A camless machine saves hours per week.

3. Do you need wire rotary for torsion springs or 3D wire forms? Only the HSM-CNC60 (with rotary variant) and HSM-CNC1045 cover this in the lineup above.

A hybrid factory often runs one cam machine (HSM-CNC20 is the most common anchor) and one camless machine (HSM-CNC1025) side by side.

Closing

If your wire diameter, part complexity, and production volume are clear, the model selection above usually narrows to one or two candidates. What is the most complex spring geometry your factory currently produces, and which machine in this list would you consider benchmarking against it?

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