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ST Series Presses: Full Range C‑Frame & H‑Frame Mechanical & Servo Presses for Precision Stamping

2026-05-13

In today’s competitive metal stamping industry, manufacturers demand high precision, high rigidity, low energy consumption, and easy automation integration from small-to-medium tonnage presses. Dongguan Qiaosen Machinery officially launches the ST Series—a full lineup of C-frame single/double crank mechanical presses, servo presses, and heavy-duty H-frame servo presses—covering 25–315 tons, designed for automotive parts, electronics, home appliances, and general hardware stamping. With JIS Class 1 precision, rigid monoblock frames, and intelligent control options, the ST series delivers consistent performance from simple blanking to complex deep drawing.

I. ST Series Lineup & Core Technical Advantages

The Qiaosen ST series includes multiple sub-models for different workloads and precision needs:

ST (Standard Mechanical Model): C-frame single-crank mechanical press, 25–200 tons, for general-purpose stamping
STC (Reinforced Mechanical Model): C-frame double-crank mechanical press, 110–315 tons, for high rigidity and high speed
STA (C-frame Servo Model): C-frame single-crank servo press, 45–200 tons, with programmable curves and energy saving
STD (H-frame Servo Model): H-frame single-crank servo press, 200–315 tons, with ultra-high rigidity for heavy-load thick plate stamping

1. Main Structural Features

Integral High-Strength Fuselage: Thick steel plate welding/casting forming, aging treatment, minimal load deformation
Crankshaft: Forged from 42CrMo alloy steel, 1.3 times stronger than 45# steel, wear-resistant and impact-resistant
Copper Bushing: ZQSn10-1 tin-phosphorus bronze, 1.5 times stronger than ordinary BC6 brass
Slider Guide Rail: Six-point guiding, high-frequency quenching + grinding, high precision and low wear
Clutch: OMPI pneumatic dry clutch, long service life and fast response
Overload Protection: High-sensitivity hydraulic overload protection to protect the fuselage and mold
Control System: Siemens PLC + touch screen, supporting linkage with servo feeders and manipulators

2. ST Series Mainstream Model Parameter Table (25–315 Ton)

Model	Type	Nominal Pressure (Ton)	Stroke (mm)	SPM (Min⁻¹)	Slider Parallelism (mm/300mm)	Repeat Positioning Accuracy (mm)	Energy Consumption (kWh/h)
ST-25	C-frame mechanical	25	80	80–120	≤0.020	±0.008	0.45
ST-45	C-frame mechanical	45	90	70–110	≤0.020	±0.008	0.55
ST-80	C-frame mechanical	80	100	60–100	≤0.018	±0.006	0.65
ST-110	C-frame mechanical	110	110	50–90	≤0.018	±0.006	0.75
STC-160	C-frame double crank	160	120	45–80	≤0.015	±0.005	0.85
STA-160sv	C-frame servo	160	120	20–100	≤0.015	±0.003	0.68
STD-250sv	H-frame servo	250	150	20–100	≤0.015	±0.003	0.70
STD-315sv	H-frame servo	315	160	20–90	≤0.012	±0.002	0.75

3. Mechanical vs Servo (ST vs STA/STD) Performance Comparison

Comparison Item	ST/STC (Mechanical)	STA/STD (Servo)	Servo Advantage
Driving Method	Motor + belt + flywheel + clutch	Direct servo drive	No belt loss, higher efficiency
Stamping Curve	Fixed	9 programmable curves (deep drawing, slow forming)	Adapt to complex processes
Repeat Accuracy	±0.006~0.008 mm	±0.002~0.003 mm	2–3× higher precision
Energy Consumption	0.55–0.85 kWh/h	0.68–0.75 kWh/h (high tonnage)	15–20% saving under variable load
Noise (Full Load)	≤82 dB	≤72 dB	Quieter workshop
Mold Life	Baseline	+230~260%	Greatly reduced cracking in AHSS

II. Application Scenarios & Model Selection Guide

Recommended Selection by Industry & Material

Application	Material & Thickness	Recommended Model	Key Benefits
Electronic parts, small hardware	0.5–2.0 mm steel/aluminum	ST-25/45/80	Fast, low cost, easy automation
Home appliance components	1.0–3.0 mm cold-rolled steel	ST-110/STC-160	High rigidity, stable mass production
Automotive brackets, small structural parts	1.5–4.0 mm high-strength steel	STA-160sv/STD-200sv	Programmable curve, high precision
New energy vehicle thick plate parts	3.0–5.0 mm AHSS	STD-250sv/STD-315sv	Ultra-high rigidity, anti-deformation

Purchase Note:

C-frame (ST/STC/STA): Large opening, convenient feeding, suitable for small and medium parts, progressive dies
H-frame (STD): Strongest rigidity, resistance to eccentric load, suitable for thick plates, high-strength steel, large workpieces
For heavy-duty stamping, it is recommended to reserve a 20% safety tonnage to extend the service life of equipment and molds

III. User Application Feedback

Case: A Guangdong Automotive Parts Factory (Introduced in 2024)

Equipment: 2 units of STC-160 + 2 units of STA-160sv
Product: 2.0–3.0 mm high-strength steel brackets
Effect Comparison (12 months, two shifts):

Indicator	Before (Ordinary No-Brand Mechanical Punch Press)	After (Qiaosen ST/STA)	Improvement
Defect Rate	0.85%	≤0.03%	↓96.5%
Daily Output/Unit	7,200 pcs	11,800 pcs	↑64%
Annual Maintenance Cost	48,000 CNY	19,500 CNY	↓59%
Mold Life	95,000 pcs	320,000 pcs	↑237%
Payback Period	—	9 months	Fast ROI

IV. Conclusion

The Qiaosen ST series covers 25–315 tons with C-frame mechanical (ST/STC), C-frame servo (STA), H-frame servo (STD), providing one-stop precision stamping solutions for small-to-medium tonnage applications. With JIS Class 1 precision, high-rigidity monoblock frames, 42CrMo crankshafts, and intelligent servo options, the ST series helps manufacturers achieve higher precision, higher efficiency, lower energy consumption, and longer mold life.

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