Press Brake Machine Maintenance and Safe Operation
Daily, monthly and periodic checks, tooling care, and safe working practice for hydraulic press brakes.
A hydraulic press brake is a long-life machine if it is looked after. Most breakdowns trace back to dirty oil, neglected lubrication or damaged tooling. Most accidents trace back to bypassed guards or unsafe working habits. This guide covers both. Always follow the manual supplied with your machine; the intervals below are general guidance.
Daily checks
- Hydraulic oil level in the sight glass.
- No oil leaks at cylinders, hoses and valves.
- Emergency stop buttons and foot switch work correctly.
- Guards and safety devices are in place and working.
- Tooling is clean, undamaged and correctly clamped.
- Ram returns smoothly; no unusual noise from pump or valves.
Weekly and monthly
- Lubricate ram guides, back gauge screws and slides as specified.
- Clean the back gauge and remove chips and dust.
- Check electrical cabinet fans and filters; keep the cabinet closed.
- Check oil temperature after a long run; overheating suggests a cooling or valve problem.
- Inspect hydraulic hoses for cracks, swelling or abrasion.
Periodic maintenance
- Replace hydraulic filters at the interval in the manual, or sooner if the indicator shows.
- Test the hydraulic oil and change it when contaminated or at the recommended hours.
- Check ram parallelism and back gauge accuracy; recalibrate if needed.
- Inspect cylinder seals for internal leakage (ram drifting down).
- Tighten foundation bolts and check the machine is level.
Looking after tooling
Damaged punches and dies cause inconsistent angles and marks. Store tools in racks, never drop them, keep them lightly oiled, and never exceed the rated load per metre stamped on the tool, especially when bending short, thick parts.
Safe operating practice
- Only trained, authorised operators should run the machine.
- Never put hands between the punch and die. Hold the sheet from the front and sides.
- Use the slowest safe speed during set-up and trial bends; use inch mode where available.
- Never bypass guards, light curtains or interlocks.
- Support long or heavy sheets; they can whip up during bending.
- Two-person operation needs a clear signal and, ideally, a two-foot-switch arrangement.
- Isolate power and lower the ram onto blocks before working under tooling.
Devraj press brakes provide instant ram stoppage, which helps prevent accidents. Additional guarding such as light curtains can be specified at the time of order.
Signs that need attention
| Symptom | Possible cause |
|---|---|
| Ram drifts down when stopped | Worn cylinder seals or leaking valve |
| Angle varies along the length | Ram out of parallel, worn tooling, or need for crowning |
| Oil overheating | Low oil level, blocked cooler or filter, relief valve issue |
| Noisy pump | Air in system, low oil, blocked suction filter |
| Back gauge inaccurate | Dirt on screws or slides, loose couplings, needs calibration |