Fixed Bed Press With Adjustable Stroke
The JL21 series open fixed-table stroke-adjustable crankshaft press features high precision & reliability. With a steel-welded high-rigidity body (optimized structure for stability), adjustable slider stroke & eight-sided guide technology ensures ±0.02mm motion control accuracy, fitting various molds. Equipped with pneumatic friction clutch & hydraulic overload protection for safety; auto-lubrication + PLC system supports multi-mode operation & quick mold changes. Optional photoelectric protection/auto-feeding modules adapt to smart lines; variable-frequency speed control, modular design eases maintenance. Widely used in auto, home appliance sectors as an efficient stamping choice.
- Information
Open Front Fixed Bed Press with Adjustable Stroke：Intelligent Stamping Innovator
I. Open Front Fixed Bed Press with Adjustable Stroke —— Flexible and efficient precision stamping solution
Engineered for reliability and performance, our open front crankshaft press, a high-performance fixed bed press with adjustable stroke, integrates mechanical rigidity with intelligent overload protection—making it an ideal choice for small to medium manufacturers. This c type press machine also supports the flexibility of a variable stroke power press, offering a durable, low-maintenance alternative to hydraulic systems. Whether you're running batch production of auto parts or precision sheet metal forming, this c type press machine delivers consistent results with minimal downtime, while the fixed bed press with adjustable stroke design ensures stable operation even in high-frequency workflows.
Xuji SJL21 Series, available as a large c frame press for heavy-duty applications, integrates cylinder-based stroke adjustment technology—core to the variable stroke power press—enabling slide stroke freely adjustable between 10-220 mm. This breaks through the fixed-stroke limitation of traditional single-point presses, significantly enhancing the crankshaft press’s adaptability to complex processes. As a premium fixed bed press with adjustable stroke, it’s equipped with hydraulic overload protection featuring auto-release and alarm under overpressure, which reduces maintenance costs by 30%. The high-rigidity welded frame of this c type press machine, especially the large c frame press variant, combined with octagonal guide rails ensures ±0.02mm positioning accuracy, extending die life by 30%.
Standard imported PLC and pneumatic counterbalance system support electric die adjustment, automatic lubrication, and automation module expansion for thecrankshaft press. This variable stroke power press achieves 40% overall performance improvement over single-point presses, making thefixed bed press with adjustable stroke ideal for high-precision stamping in automotive, electronics, and home appliance industries. Thelarge c frame press model further expands application scope to heavy-gauge sheet metal forming, while retaining the c type press machine’s operational flexibility.
II. Technical Features
High-strength steel welded frame, optimized for the large c frame press and c type press machine structures.
Combined dry pneumatic clutch, matched with crankshaft press drive system for quick response.
Adjustable-stroke cylinder type, the core component of the variable stroke power press and fixed bed press with adjustable stroke.
Eight-sided guided slide (XJL21-25: six-sided guided) to ensure precision of the crankshaft press.
Hydraulic overload protection, standard on all models including the large c frame press and c type press machine.
Automatic oil circulation lubrication (XJL21-25: electric grease lubrication) for the fixed bed press with adjustable stroke.
XJL21-45 and larger: electric die height adjustment with digital display, exclusive to the large c frame press variant of the variable stroke power press.
Balanced lifting cylinder, reducing vibration of the crankshaft press during high-speed operation.
Imported dual solenoid valve, ensuring stable performance of thec type press machine.
Integrated PLC with electrical cam (international brand) for intelligent control of thefixed bed press with adjustable stroke.
International brand components: buttons, AC contactors, air circuit breakers, standard on every crankshaft press and large c frame press.
Options: air cushion, automatic feed device, light curtain, slide knockout, automation devices—compatible with all variable stroke power press models.
III. Core advantages: Double breakthroughs in intelligent regulation and safety performance
1. Intelligent stroke adjustment, adaptable to various processes
As a leading variable stroke power press, this model uses cylinder stroke adjustment technology—core to the fixed bed press with adjustable stroke—allowing slider stroke to be freely set within 10-220mm, supporting fixed and variable modes. The crankshaft press’s stroke flexibility, paired with the c type press machine’s compact design, significantly improves adaptability to complex processes. Compared with traditional fixed-stroke presses, the large c frame press variant also excels in deep drawing, precision molding, and other stroke-sensitive scenarios, expanding application versatility.
2. Hydraulic overload protection, reducing maintenance costs
Every fixed bed press with adjustable stroke, including the crankshaft press and large c frame press, is equipped with an imported hydraulic safety device. This system, integrated into the c type press machine, monitors pressure load in real time, triggering automatic pressure relief and alarm when exceeding limits. Compared with mechanical collapse insurance of single-point presses, hydraulic protection for the variable stroke power press eliminates the need to replace physical parts, boosting maintenance response speed by 50% and reducing downtime loss by 30%.
3. High rigidity body and precision guide system
The welded steel structure body of the c type press machine and large c frame press undergoes aging treatment, with rigidity 40% higher than traditional models. This design, combined with six-sided rectangular guide rails (eight-sided for large models) and precision sliders, ensures the crankshaft press andfixed bed press with adjustable stroke achieve ±0.02mm repeat positioning accuracy. For the variable stroke power press, this rigidity guarantees consistent performance across all stroke settings, extending mold life by 30%.
4. Low noise and energy saving, support automatic upgrade
Oil-immersion lubrication technology reduces operating noise of thecrankshaft press and large c frame press to below 85dB, while the pneumatic balancing device minimizes vibration of the c type press machine. The fixed bed press with adjustable stroke supports optional intelligent modules such as automatic feeding and quick mold change, enabling full-process automation via the PLC system. This not only enhances the variable stroke power press’s efficiency but also reduces energy consumption by 20%.
IV. Technical Parameters
JL21-25 | JL21-45 | JL21-63 | JL21-80 | JL21-110 | |||
Nominal Force | kN | 250 | 450 | 630 | 800 | 1100 | |
Nominal Stroke | mm | 3 | 4 | 4 | 5 | 6 | |
Slide Stroke | mm | 10-110 | 20-120 | 10-150 | 10-150 | 10-160 | |
SPM | Fixed | min⁻1 | 100 | 80 | 70 | 60 | 50 |
Variable (Option) | min⁻1 | 80-120 | 40-90 | 35-80 | 50-70 | 30-60 | |
MAX Die Height | mm | 250 | 270 | 300 | 320 | 350 | |
Die Height Adjustment | mm | 50 | 60 | 80 | 80 | 80 | |
Throat Depth | mm | 210 | 230 | 300 | 300 | 350 | |
Between Columns | mm | 450 | 550 | 620 | 640 | 710 | |
Bolster Area | mm | 810 x 440 | 900 x580 | 1000 x 580 | 1150 x 680 | ||
mm | Φ180 x 30 xΦ160 | Φ200 x 40 xΦ180 | Φ200 x 40 xΦ180 | Φ260 x 50 xΦ220 | |||
Bolster Thickness | mm | 80 | 110 | 110 | 120 | 140 | |
Slide Area (FB x LR) | mm | 360 x 300 | 600 x 360 | 680 x 400 | 710 x 440 | 810 x 500 | |
Shank Hole (Dia x Depth) | mm | Φ40 x 60 | Φ50 x 80 | Φ50 x 80 | Φ60 x 80 | ||
Main Motor Power | kW | 4 | 5.5 | 7.5 | 5.5 | 11 | |
Outline Dimension (FB x LR x H) | mm | 1500 x 950 x 2650 | 1610 x 1170 x 2850 | 1680 x 1260 x 3050 | 1750 x 1310 x 3150 | 1860 x 1400 x 3350 | |
Specification | JL21-125 | JL21-160 | JL21-200 | JL21-250 | ||
Nominal Force | kN | 1250 | 1600 | 2000 | 2500 | |
Nominal Stroke | mm | 6 | 6 | 6 | 8 | |
Slide Stroke | mm | 10-160 | 16-160 | 18-180 | 21-220 | |
SPM | Fixed | min⁻1 | 50 | 45 | 40 | 30 |
Variable (Option) | min⁻1 | 30-60 | 25-50 | 25-50 | 20-40 | |
MAX Die Height | mm | 350 | 350 | 450 | 500 | |
Die Height Adjustment | mm | 80 | 110 | 110 | 120 | |
Throat Depth | mm | 350 | 230 | 390 | 420 | |
Between Columns | mm | 760 | 810 | 920 | 960 | |
Bolster Area (FB x LR) | mm | 1150 x 680 | 1300 x 740 | 1400 x 760 | 1400 x 800 | |
Bolster Opening (up dia. x depth x low dia.) | mm | Φ250 x 50 x Φ220 | Φ300 x 50 x Φ260 | Φ300 x 50 x Φ260 | Φ320 x 50 x Φ280 | |
Bolster Thickness | mm | 140 | 150 | 160 | 170 | |
Slide Area (FB x LR) | mm | 810 x 500 | 920 x 580 | 970 x 600 | 970 x 650 | |
Shank Hole (Dia x Depth) | mm | Φ60 x 80 | Φ65 x 85 | Φ65 x 90 | Φ70 x 90 | |
Main Motor Power | kW | 11 | 15 | 18.5 | 22 | |
Outline Dimension (FB x LR x H) | mm | 1860 x 1450 x 3350 | 2250 x 1600 x 3800 | 2500 x 1700 x 4200 | 2730 x 1640 x 3550 | |
V. FAQ
Q1: How to quickly adjust the stroke of the variable stroke power press?
A1: Directly set the stroke value via the control panel of the fixed bed press with adjustable stroke, supporting manual fine-tuning and automatic memory functions. The adjustment accuracy is ±1mm, applicable to both the crankshaft press andlarge c frame press variants.
Q2: Does the hydraulic insurance affect the production continuity of the c type press machine?
A2: The hydraulic system of this crankshaft press has a millisecond-level response time. After eliminating faults, production can resume immediately without stopping to replace parts—critical for the variable stroke power press and large c frame press in mass production.
Q3: Can the fixed bed press with adjustable stroke be adapted to automated production lines?
A3: Yes. All models, including the c type press machine and large c frame press, come standard with photoelectric protection, automatic feeding shafts, and quick mold change devices. This allows seamless connection with robot systems, maximizing the variable stroke power press’s productivity.
Q4: What materials are suitable for the crankshaft press and large c frame press?
A4: This fixed bed press with adjustable stroke processes 0.1-10mm thick steel plates, aluminum alloys, and copper. The large c frame press handles heavier gauges, while the c type press machine excels in precision sheet metal—both as variable stroke power press variants.
Q5: What is the maintenance cycle for the c type press machine?
A5: Check hydraulic oil every 500 hours for the crankshaft press and large c frame press. Perform annual comprehensive maintenance on the fixed bed press with adjustable stroke to ensure the variable stroke power press’s long-term stability.
