Single-point precision punching machine and double-point precision punching machine are two common types of stamping equipment, what are their differences? The following is a detailed comparison of them:
Single Point Precision Punching Machine
1. Structural features: the slide is driven by a single point (usually crankshaft or eccentric gear), relatively simple structure and low manufacturing cost.
2. Application Scenario: Suitable for stamping of small and medium-sized workpieces, symmetrical or simple shapes, such as electronic components, small metal parts and so on.
3. Advantages: economic price, easy maintenance. Suitable for low tonnage (usually ≤200 tons) and production with low speed requirement.
4. Limitations:
① Weak partial load capacity: single point drive may lead to tilting of the slider in eccentric force, affecting the accuracy and mold life.
② Poor stability, not suitable for large or asymmetric workpieces.
Double Point Precision Punching Machine
1. Structural features: the slider is driven by two points synchronously (double crankshaft or double linkage), the force distribution is more uniform.
2. Application Scenario: Suitable for large workpieces, non-symmetrical shapes or high-precision requirements, such as automotive sheet metal parts, household appliance housings, etc.
3. Advantages:
① Strong resistance to partial load: two-point drive balances the force on the slider and reduces the risk of tilting.
② High stability, suitable for high tonnage (up to 1000 tons or more) and high-speed continuous stamping.
③ Longer mold life, better product consistency.
4. Limitations:
① Complex structure, high cost.
② Maintenance is slightly more difficult, need to check the synchronization mechanism regularly.
Comparative summary of key features:
| Name | Single Point Precision Punching Machine | Double Point Precision Punching Machine |
| Drive point | Single point | Two-point synchronized drive |
| Offset capacity | Weak, easy to tilt | Strong, suitable for asymmetric machining |
| Tonnage range | Usually ≤ 200 tons | Up to 1000 tons or more |
| Accuracy | General | Higher, good stability |
| Costs | Low | Higher |
| Typical Applications | Small symmetrical workpieces, simple stamping | Large workpieces, complex shapes, continuous production |
Pictures for reference：
| Open type single point precision punching machine | Closed Type Single Point Precision Punching Machine |
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| Open type double point precision punching machine | Closed Type Double Point Precision Punching Machine |
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Recently, Shanghai ANTS Machine Equipment Co., Ltd. received an inquiry from a manufacturer of door and window hardware, and according to the customer’s requirements, we recommended an 80-ton pneumatic punching machine to the customer.
JH21-80T is an open-type single-point precision punching machine, which is mainly applicable to the realization of cold stamping process such as punching, punching, forming, bending, shallow drawing, etc. It is widely used in electric vehicles, agricultural machinery, tractors, mining machinery, hardware tools, machinery manufacturing and other industrial fields. Adoption of pneumatic press processing production is more hygienic and clean. Adopting advanced photoelectric protection technology, it can realize a significant increase in safety performance, and the computer counting with the program can realize unattended processing, which greatly improves the work efficiency and reduces the production cost.
| Description | JH21-80T |
| Normal force (kN) | 800 |
| Ability occurrence point (mm) | 5 |
| slide stroke (mm) | 140 |
| max die set height (mm) | 320 |
| Number of stroke of slider (mm) | 60 |
| Mold height adjustment (mm) | 80 |
| throat depth (mm) | 300 |
| Slider surface size (mm) | 420*560 |
| bed dimension (mm) | 1000*580 |
| The main motor(kw) | 7.5×4 |
Remark: The above parameters are for reference only, the actual parameters of the machine please refer to the technical program of Shanghai ANTISHICNC.
If you have the punching machine needs too, welcome to consult Shanghai ANTS Machine Equipment co., ltd. We have rich experience in manufacturing and using punching machine and can provide you with professional technical support.
Keywords: punching machine, pneumatic punching machine, 80 tons punching machine, hydraulic press machine