CE Approved JL21 C Frame Variable Stroke Press

Main Features of Variable Stroke Press:

Our full-series mechanical punch presses cover a force range from 25 Ton all the way to 250 Ton, built for high-precision, safe and flexible stamping across light, medium and heavy industrial production scenarios.

1. Full Tonnage Coverage for All Scenarios‌: The complete product line spans 25-ton small workshop models to 250-ton heavy-duty stamping workhorses, perfectly matching your diverse demands from thin sheet blanking to thick plate forming.

2. Tool-Free Adjustable Stroke‌: The built-in eccentric bush system lets you freely adjust stroke length, with a dedicated monitor window for manual adjustment to read real-time stroke data clearly, no extra complex calibration tools required.

3. Industry-Leading Ram Guide Accuracy‌: Models 45 Ton and above adopt 8-sided full-contact ram guides, while the 25-ton version uses high-performance 6-sided rectangular ram guides — both designs eliminate lateral ram sway completely to deliver micron-level stamping consistency.

4. Tiered Optimized Lubrication System‌: 45~250 Ton models use thin oil circulating lubrication for continuous high-load operation, while the 25-ton model uses reliable grease lubrication to fit its compact, low-maintenance positioning.

5. Full Safety & Smart Upgrade Package‌: Every unit comes standard with safety light barriers for immediate emergency stop when operators enter the danger zone, a built-in frequency inverter for adjustable stamping speed to match different materials and processes, and factory-fitted anti-vibration pads to absorb operational shock without extra foundation reinforcement.

More Details of Stroke Adjustable Press:

Power press stroke length adjusting mechanism The mechanism is installed in front of the crankshaft, adjustable by manual. Motorized adjustment is optional. There is a hole for operator to check the right stroke length position. A knob for adjusting the stroke length is located on the press console. When adjusting, the pneumatic cylinder will drive the adjusting shaft out. Use a spanner to adjust the shaft to the wanted position. Turn back the stroke adjusting knob and the shaft will return back to original position.

Standard equipment of the stroke adjustable press

1. Dry type combined pneumatic clutch and brake

2. PLC central control system with HMI

3. Hydraulic overload protection system

4. Ram motorized adjusting system for 60ton and bigger sizes presses

5. Frequency inverter for adjustable stroke speeds

6. Eight faces ram gibs with bronze guide plates (25ton press is 6 faces type)

7. Automatic circulate thin oil lubrication system

8. Anti-vibration pads for press machine installation

Technical parameters of adjustable stroke crank press