APA / JH21 Open-type Precision Pressing Machine
Open-Type Pneumatic-Mechanical Pressing Machines for Sheet-Metal Stamping
DAIDISIKE supplies the workhorses of the stamping floor: open-type C-frame pressing machines from 25 tons up to 160 tons, with a flywheel-and-crankshaft mechanical drive and pneumatic clutch control — the configuration that gives you the speed of a true mechanical press (up to 110 strokes per minute) and the safety/repeatability of pneumatic engagement. The APA / JH21 single-crankshaft range covers the everyday 25–80 ton bracket for blanking, piercing, trimming, coining, and progressive-die work; the APE / APC / APD double-crankshaft family steps up to wider bolsters and heavier drawing where slide parallelism matters. All presses ship ready to integrate with the DAIDISIKE feeder and straightener line for a complete coil-to-part automation stack, and pair with our Type 4 safety light curtains for ISO 16092 / EN 692 compliance.
Tonnage Selection Quick-Reference
Pick tonnage based on cutting perimeter × material thickness × shear strength, with a 30 % safety margin (see the FAQ below for the formula). Stroke rate trades off against tonnage — bigger presses have heavier slides and run slower.
| Model | Tonnage | Max Speed | Slide Area | Typical Work |
|---|---|---|---|---|
| APA-25 | 25 t | 110 SPM | 200 × 300 mm slide | Small electronics stamping, terminal & connector manufacturing |
| APA-35 | 35 t | 100 SPM | 250 × 350 mm slide | Mid-size brackets, small enclosures, lock parts |
| APA-45 | 45 t | 90 SPM | 300 × 400 mm slide | Hardware fittings, motor laminations, hinge plates |
| APA-60 | 60 t | 80 SPM | 350 × 450 mm slide | Heavier brackets, automotive small parts, structural plates |
| APA-80 | 80 t | 70 SPM | 400 × 500 mm slide | Drawing operations, deeper coining, multi-station tools |
| APE/APC/APD | 60-160 t | 60-80 SPM | Wider bolster, 600-1000 mm | Wide tools, heavy drawing, large multi-cavity dies |
Stamping Operations the APA / JH21 / APE Family Handles
Sheet-Metal Blanking
Cut flat blanks from coil or sheet stock — the most common stamping operation. APA-35 at 100 SPM handles 90 % of typical mid-size blanking jobs in mild steel, aluminum, and brass up to about 3 mm thickness.
Progressive-Die Stamping
Multi-station tools that punch, bend, and form a part across successive strokes in a single press. Requires accurate feed pitch — pair the press with an NCF servo feeder for ±0.05 mm registration.
Coining and Embossing
Stamp logos, serial numbers, or decorative features into the part surface. Smaller depth than blanking but higher precision and finish requirement. Pneumatic clutch gives consistent dwell at bottom dead centre.
Drawing (Deep Drawing)
Form a flat blank into a cup, cone, or box shape. Tonnage is heavily dependent on draw ratio and material. Double-crankshaft APE/APC/APD models hold slide parallelism under off-centre draw loads.
Trimming and Piercing
Secondary operations after forming — trim flash, pierce holes, notch edges. Lower tonnage requirement (often a 25-ton APA), high cycle rate critical to keep up with the upstream forming press.
Electronics and Connector Stamping
Terminals, contacts, lead frames, shield cans — thousands of small precision parts per coil. Pair APA-25 or APA-35 with a small pneumatic feeder and pitch-accurate progressive die.
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Building the Complete Stamping Line
A pressing machine alone is only half the system. The full automated coil-to-part line has four DAIDISIKE components working in sync:
- Coil cradle & uncoiler — UL-series 2-in-1 material rack holds coil up to 1500 kg, with motorized unwind + loop pit control.
- Straightener & leveler — TL-series 7- or 9-roll leveler removes coil set and crossbow before feed; essential for tight progressive-die work.
- Feeder — A50/A100/BX150 pneumatic feeder for general progressive work at ±0.05 mm pitch, or NCF servo roller feeder for tightest pitch accuracy on multi-station tools.
- Safety system — Type 4 safety light curtains + two-hand control + safety relay; required for ISO 16092 / EN 692 compliance.
Frequently Asked Questions
Mechanical, pneumatic, or hydraulic press — which type is the APA/JH21?
The APA and JH21 are mechanical presses driven by a flywheel-and-crankshaft system, with a pneumatic clutch for engagement and disengagement. This combination gives the speed of a mechanical press (up to 110 strokes per minute) with the safety and repeatability of pneumatic clutch control — far faster than a hydraulic press, far more controllable than a pure mechanical clutch. The 'pneumatic mechanical' designation refers specifically to the clutch type, not to the main drive.
How do I pick the right tonnage for my stamping job?
The rule of thumb: required tonnage (in tons) = perimeter of the cut (in mm) × material thickness (in mm) × shear strength (in kg/mm²) / 1000, plus a 30 % safety margin. For typical mild steel (35 kg/mm² shear) cutting a 100 mm × 50 mm rectangle (perimeter 300 mm) at 2 mm thickness: 300 × 2 × 35 = 21,000 kg = 21 tons, plus 30 % = 27 tons. Round up to the next standard tonnage: a 35-ton APA-35 handles this job with margin. For drawing and coining the math is different — please contact us with your specific operation.
What's the difference between single-crankshaft (APA/JH21) and double-crankshaft (APE/APC/APD)?
Single-crankshaft presses have one drive shaft and one connecting rod attached to the centre of the slide — simpler, cheaper, more compact, suitable for narrow tools and progressive-die operations. Double-crankshaft presses have two drive shafts and two connecting rods supporting the left and right ends of the slide — they hold the slide perfectly parallel even when the work is loaded off-centre (e.g., a wide drawing operation where the load shifts during the stroke). Double-crankshaft is the right choice for wide tools (>500 mm bolster), heavy drawing, and applications where slide tilt would damage the die.
How does this press integrate with feeders and uncoilers for an automated line?
DAIDISIKE supplies the matching automation: the A50/A100/BX150 pneumatic feeder mounts directly on the press for synchronized strip advance, the NCF servo roller feeder handles tighter pitch accuracy on progressive-die work, the TL-series leveler-straightener flattens coil set before feed, and the UL-series 2-in-1 material rack handles coil unwind plus loop control. A typical complete line is: uncoiler → straightener → feeder → press → exit conveyor, with the press's cam-controlled output triggering each upstream device.
What about machine safety — do I need light curtains and an E-stop chain?
Yes. Mechanical stamping presses are listed under ISO 16092 and require Type 4 safety light curtains on the operator side, plus a verified two-hand control or palm-button arrangement, plus a safety relay or safety PLC running the dual-channel E-stop logic with EDM feedback. DAIDISIKE supplies the matching DQA, DQC, and DQE safety light curtains plus DA31 safety relay modules — see the safety-light-curtain category for the full lineup. The press itself ships with a top-stop interlock and a slide-blocking system for die-change service.
What's the typical lead time and what's included in the standard delivery?
Standard delivery for APA/JH21 in stock tonnages is 4 to 6 weeks from order; custom tonnages or non-standard bed sizes run 8 to 12 weeks. Standard delivery includes the press, foundation bolt set, pneumatic clutch, lubrication system, electric control cabinet, two-hand operator station, and basic operation/maintenance manual. Optional adds: tonnage monitor, die-cushion, photoelectric safety guards, automatic die-change system, and integration with our feeder/straightener line.