Eagleflying can supply the turnkey machine screw production line.

Machine screws are among the most fundamental fasteners in electronics, automotive, machinery, appliances and precision assembly — they are driven into pre-tapped holes or used with nuts to form secure threaded connections. A turnkey machine screw line takes you from steel, stainless or brass wire rod to inspected, coated and packed finished screws. It is a cold-forming + thread-rolling + heat-treatment + surface-treatment system, different from a self-drilling line in that it requires no drill-point forming but demands higher head-forming precision and tighter thread tolerances.

1. Typical Products

Hex head machine screws (DIN 933 / DIN 931 / ISO 4017 / ISO 4014)

Slotted pan head (DIN 84 / ISO 1207), Phillips pan head (DIN 7985 / ISO 7045), slotted countersunk (DIN 963 / ISO 2009), Phillips countersunk (DIN 965 / ISO 7046)

Hex socket head cap screws (DIN 912 / ISO 4762)

Set screws, dog point, cup point (DIN 913 / 914 / 915 / 916)

Cheese head, round head, truss head, oval head

M1.0, M1.2, M1.4, M1.6, M2, M2.5, M3, M4, M5, M6, M8, M10

Length range: 2–100 mm (or #0–1/2")

Drive types: slotted, Phillips, Pozi, hex socket, hex, Torx

Materials: C1018 / C1022A / 10B21 low-carbon, 35K / SCM435 alloy, 304 / 316 / 410 stainless, brass

Surface treatments: zinc plating, black oxide, phosphate, nickel, Dacromet, Ruspert, passivation

Standards: DIN, ISO, ANSI/ASME B18.6.3, JIS, GB

2. Production Flow

Wire Rod→Descaling/Pre-treatment→Wire Drawing→Cold Heading→Thread Rolling→De-oiling→Heat Treatment→Surface Treatment→Inspection→Packing

Stage	Equipment	Purpose
Wire preparation	Descaler, lubricant coater	Clean oxide scale, apply lime/soap coating for drawing
Wire drawing	Straight-type / pulley drawing machine	Reduce rod to screw shank diameter (M1.0–M10)
Cold heading	1-die 2-blow/2-die 2-blow/3-station header	Form hex/pan/CSK/truss/socket head, drive recess, blank length
Thread rolling	High-speed flat-die roller / thread rolling machine	Roll metric threads on soft blank
De-oiling	Wash tank/ultrasonic de-oiler	Remove rolling oil before furnace
Heat treatment	Mesh-belt heat treatment furnace (carburize/quench/temper as required)	Case-hardened surface, tough core (if required by grade)
Surface treatment	Zinc plating / Dacromet / Ruspert / phosphate / black oxide line	Corrosion resistance per market
Inspection	Optical sorter, hardness tester, thread gauge, tensile test	Dimensional, metallurgical and functional QC
Packing	Counting+bagging/box/collated-strip machine	Bulk, boxed, or magazine-packed finished screws

Threads are rolled before heat treatment; this is the standard cold-formed machine screw method and gives stronger, cleaner threads than cutting. No drill-point forming is required, distinguishing it from a self-drilling line; head-forming precision and thread tolerances are typically tighter for mating with nuts or pre-tapped holes.

3. Key machine specification (reference)

Wire diameter: 1.0–10.0 mm (M1.0–M10)

Screw length: 2–100 mm

Cold heading: M1.0 400–550, M1.6 280–380, M2 240–320, M3 180–260, M4 140–200, M5 110–160, M6 80–130, M8 45–80, M10 25–50 pcs/min.

Thread rolling: M1.0 450–600, M1.6 350–450, M2 320–400, M3 280–360, M4 220–300, M5 180–260, M6 150–220, M8 100–180, M10 60–120 pcs/min.

Header motor: 0.75–11 kW

Thread roller motor: 1.1–7.5 kW

Mesh-belt furnace: 60–300 kg/h by model (typical line 150–250 kg/h)

Zinc/Dacromet line: 150–600 kg/h by configuration

Optical sorter: 200–800 pcs/min by model (typical line 300–500 pcs/min)

Realistic line efficiency: 80–90% under stable conditions

Catalog speeds are not sustained speeds. Tooling wear, wire quality, length changes, and packing bottlenecks all affect real output.

4. Machine configuration

No.	Equipment	Function
1	Pay-off + straightener	Control wire tension and straightness
2	Wire drawing machine	Reduce rod to match M1.0–M10 shank (1.0–10.5mm)
3	Cold heading machine (1D2B/2D2B/3-station)	Head, recess, blank length forming
4	Thread rolling machine	Flat-die/roller thread forming for machine screws
5	De-oiling machine	Remove rolling oil before furnace
6	Mesh-belt heat treatment furnace	Heat treatment (carburize/quench/temper or anneal as required)
7	Plating/Dacromet/Ruspert/phosphate line	Corrosion protection by market
8	Optical sorter + thread/tensile test	Dimension, crack, thread gauge, coating check; tensile test (lab)
9	Packing machine	Bulk, boxed, collated strips, magazine coils

5. Capacity Reference

Size	Header Speed	Roller Speed	Balanced Output	Annual (300d×20h)
M1.0×2-8mm	400-550pcs/min.	450-600pcs/min.	~350pcs/min.	~63 Million pcs/yr ≈ 0.5-1.5t/yr
M1.6×3-12mm	280-380pcs/min.	350-450pcs/min.	~250pcs/min.	~45 Million pcs/yr ≈ 1.5-3t/yr
M2×4-16mm	240-320pcs/min.	320-400pcs/min.	~220pcs/min.	~39.6 Million pcs/yr ≈ 3-5t/yr
M3×5-25mm	180-260pcs/min.	280-360pcs/min.	~160pcs/min.	~28.8 Million pcs/yr ≈ 6-10t/yr
M4×6-40mm	140-200pcs/min.	220-300pcs/min.	~120pcs/min.	~21.6 Million pcs/yr ≈ 10-18t/yr
M5×8-50mm	110-160pcs/min.	180–260pcs/min.	~90pcs/min.	~16.2 Million pcs/yr ≈ 18-28t/yr
M6×10-60mm	80-130pcs/min.	150–220pcs/min.	~70pcs/min.	~12.6 Million pcs/yr ≈ 28-45t/yr
M8×12-80mm	45-80pcs/min.	100–180pcs/min.	~40pcs/min.	~7.2 Million pcs/yr ≈ 45-70t/yr
M10×16-100mm	25-50pcs/min.	60–120pcs/min.	~25pcs/min.	~4.5 Million pcs/yr ≈ 70-120t/yr

Note: Output drops significantly at max size/length due to longer feed and roll cycle time. Balanced output is limited by cold heading speed under 80-90% realistic line efficiency.

6. Material & Finishing

Wire: C1018 / C1022A / 10B21 low-carbon cold heading wire; 35K / SCM435 alloy; 304 / 316 / 410 stainless; brass

Case hardness: approx. HV 450–560 (heat-treated grades)

Core hardness: approx. HRC 22–32 (8.8) / HRC 28–36 (10.9) / up to HRC 39–44 (12.9, alloy)

Zinc plating: general corrosion resistance for indoor/outdoor use

Black oxide / phosphate: indoor, dry environments

Nickel / zinc-nickel: higher corrosion and temperature resistance, automotive/electrical

Dacromet / Ruspert / ceramic coating: humid, coastal or semi-corrosive environments

Hot-dip galvanizing: heavy corrosion protection, mainly M6 and larger

Passivation: standard for 304/316 stainless steel

Washer (optional SEMS): flat, spring, tooth, nylon, color-matched

7. Line Configurations We Offer

Basic line:

1 header + 1 thread roller + simple heat treatment (as needed) + manual packing

Good for trial production or small machine screw plant (M3–M10).

Standard Line:

Wire drawing + 1D2B/2D2B/3-station header + high-speed thread roller + mesh-belt heat treatment + zinc/Dacromet line + optical sorting + automatic packing

Best choice for standard machine screw factory (M1.6–M10).

High-Speed Line:

Dual headers + dual rollers + servo camless heading + online CCD inspection + optional SEMS assembly + robotic/collated packing

For large-scale plants serving electronics, automotive and export markets (M1.0–M10).

8. Our Scope as Turnkey Integrator

We design and supply the complete line:

Line configuration by product mix and target capacity

Machine sourcing from verified Chinese fastener-equipment makers

Factory layout and material flow drawing

Tooling and die list (header punches, main dies, cut-off & trimming dies, thread rolls)

Heat-treatment recipe (as required) and coating process parameters

English operation manuals and spare-parts list

Installation supervision/remote commissioning

After-sales coordination with equipment suppliers

9. Why Buyers Choose a China-Made Turnkey Line

Lower CAPEX than European/Japanese lines

Mature supply chain for headers, rollers, furnaces, plating lines, optical sorters

Fast delivery for emerging-market greenfield plants

Spare parts and consumables are economical

Optional SEMS washer assembly and standard optical sorting ready for export-grade machine screws

10. Equipment Data

Mesh-belt heat treatment furnace: carburizing + quench + temper (or anneal as required), 60–300 kg/h (typical 150–250 kg/h)

Zinc plating line: 150–300 kg/h standard

Dacromet line: 200–600 kg/h

Black phosphate line: 200–400 kg/h

Black oxide line: 200–400 kg/h

Cold heading machine: wire 1.0–10.0 mm, max blank 150 mm, 25–550 pcs/min by size

Thread rolling machine: flat-die / cylindrical-die, 1.0–10.0 mm, max 100 mm, 60–600 pcs/min by size

Optical sorter: 120–600 pcs/min, checks head, length, thread, drive socket, coating, surface defect

FAQ:

Q: Can one line make all head types (hex head, pan, countersunk, socket cap, truss, hex washer)?

Yes, by changing header tooling (punches and dies). Head changeover typically takes 2–4 hours including setup and first-piece inspection.

Q: Do you supply the steel wire?

We can recommend verified Chinese wire mills (C1018, C1022A, 10B21, 35K, SCM435). Many clients buy wire locally to save freight; we provide full material specifications so your local supplier can match.

Q: What thread class and tolerance should I choose for my market?

Standard machine screws use 6g (external) / 6H (internal) per ISO 965, or 2A/2B per ASME B1.1. For precision applications (electronics, automotive), 4g/4H or 3A/3B is available. We help you select based on your target market and mating component standards.

Q: What coating should I choose?

Zinc plating for general indoor/outdoor use. Dacromet or Ruspert for coastal, humid or corrosive environments. Hot-dip galvanizing for heavy corrosion (M6 and larger). Black oxide or phosphate for dry, indoor applications. Passivation for stainless steel. We configure the surface-treatment section accordingly.

Q: Can the line handle both carbon steel and stainless steel?

Carbon steel (C1018 / C1022A / 10B21) is standard. Stainless (304/316, austenitic) requires different tooling material and 20–30% slower speeds due to work hardening; 410 (martensitic) runs closer to carbon steel speeds. Brass also requires adjusted tooling. Let us know your material mix so we configure the line correctly.

Q: How long does tooling last?

Header punches: 200,000–1,000,000 pieces depending on size and wire quality. Thread rolling plates: 2,000,000–5,000,000 pieces. We supply spare tooling lists and can provide drawings for local resharpening or reorder.

Q: What is the changeover time between sizes?

Wire diameter change: 30–60 minutes. Length change on header: 15–30 minutes. Thread roll change: 20–40 minutes. Full changeover from M3 to M6 including all tooling: half a day to one day. Adjacent sizes (e.g., M4 to M5): 2–4 hours.

Q: Do you provide operation manuals and training?

Yes. English operation manuals, tooling changeover guides, heat-treatment recipes (where applicable), and coating parameters are included. On-site installation, commissioning, and operator training are part of the turnkey scope. HMI in English, Spanish, Arabic, or French.

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