Power Press Maintenance Checklist: Daily, Weekly, Monthly and Annual
Updated: 2 days ago
Most die problems are press problems. Before you send another die for regrinding, check the machine. This checklist is what we give customers at commissioning. It covers mechanical power presses with rolling key or pneumatic clutch, C-frame and H-frame. Follow your machine's own manual where it differs, and keep a written log.
Print it, laminate it, and hang it beside the press.
Daily checks (start of every shift)
Check | What to look for | Action if wrong |
|---|---|---|
Lubrication | Give the centralised hand pump its strokes. Oil reaching gibs, connecting screw and crankshaft bushes. | Clean blocked lines before running |
Oil level | Lubrication tank and gearbox at the mark. We specify Servo System 68 oil. | Top up with the specified grade only |
Single stroke | Press stops at top dead centre after one stroke, every time. | Stop. Do not run until clutch and brake are checked |
Guards and safety devices | Die guard fixed, two-hand control working, light curtain or hand sensor tripping the press. | Stop. Repair before production |
Bolts | Die clamp bolts and connecting screw lock tight. | Re-tighten |
Sound | No knock at the bottom of the stroke. | A knock at bottom means overload or wear. Stop and inspect |
Air (pneumatic clutch) | Line pressure at the gauge setting, water drained from the filter. | Drain and reset |
Weekly checks
Belts: tension and wear on the motor-to-flywheel V-belts. A slipping belt shows up as slow flywheel recovery between strokes.
Brake: stopping position. If the ram stops further past top dead centre than last week, the brake lining is wearing.
Gibs: listen and feel for ram play. Loose gibs let the ram move sideways at impact and punches enter the die off centre.
Electricals: motor terminals tight, no overheating smell, emergency stop working.
Cleanliness: clear slugs and scrap from under the bed and die area. A chip under the die shoe tilts everything above it.
Monthly checks
Clutch: inspect the rolling key and its seat, or the friction plates on a pneumatic clutch. Replace a worn key before it causes a double stroke.
Connecting screw and ball seat: check for looseness and wear. On overloaded presses this is the first part to give way.
Bushes: check crankshaft and connecting rod bushes for play. Gunmetal and bronze bushes wear predictably when lubrication is regular.
Lubrication lines: check every line delivers oil. One blocked line is enough to seize a bush.
Foundation bolts: check the press is still level and bolted down.
Quarterly checks for die life
Ram-to-bed parallelism: check with blocks and a dial indicator, under light load as well as static. Out-of-parallel means one-sided die wear.
Gib clearance: adjust to the manual value.
Clutch and brake: a dragging brake changes the bottom dead centre position from stroke to stroke.
Bolster flatness: check for dents and wear marks.
Adjusting screw backlash: a creeping shut height produces loads you never intended.
Annual overhaul
Drain and flush the gearbox and lubrication system, refill with fresh oil.
Measure crankshaft journals and bushes, replace bushes outside limit.
Inspect the frame for cracks, especially at the throat of a C-frame and at weld joints.
Inspect the flywheel bearing and replace if noisy.
Check the electrical panel, contactors and motor insulation.
Re-level the press and re-check parallelism after the overhaul.
Overload: the fault we see most
In 40 years of service visits, overload causes more damage than any other single fault. The connecting screw or the ball seat usually gives way first. Watch for three warning signs:
The ram sticks at the bottom of the stroke.
A loud knock at the bottom of the stroke.
The connecting screw keeps loosening.
The fix is not stronger parts. Run the press at 70 to 80 percent of its rated tonnage, and size new jobs before putting them on the machine. Use our press tonnage calculator or the full tonnage guide with shear strength chart. A hydraulic overload protector can be fitted to most presses and is the cheapest insurance against a cracked frame or bent crankshaft.
Safety devices worth fitting
Two-hand push button control
Light curtain or hand sensor
Fixed die guard
Hydraulic overload protector
Read more in our power press safety guide. For pneumatic clutch presses, see pneumatic clutch and brake maintenance.
Need a press health check?
Birson stocks spares in Ludhiana and our engineers can inspect presses of any make. Send your part drawing, material and daily production on WhatsApp +91 98147 15935 or email info@birsonforgings.com. A Birson engineer will reply with a press recommendation, free of charge.
Birson Forgings has built power presses in Sahnewal, Ludhiana since 1985. ISO 9001 certified. Every machine leaves the factory after a trial run the customer can witness, and a Birson engineer commissions it at the customer's site.
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