Festa 552788 Cilindro compatto ADN-20-25-I-P-A

Numero dell'ordine: 552788

Serie: Compact cylinder, ADN series, ISO 21287 compiacente

Dimensioni del foro: 20 mm

Colpo: 25 mm

Ammortizzazione: Ammortizzazione pneumatica regolabile su entrambe le estremità

Filettatura dello stelo del pistone: Internal thread

Piston magnet: With magnetic ring (compatible with magnetic proximity switches)

Opzioni di montaggio: Multiple accessories available; anteriore, rear, foot and flange mounting

Mezzo di lavoro: Aria compressa, filtered (lubrificato o non lubrificato)

Pressione di esercizio: 0.6 … 10 sbarra

Temperatura ambiente: -20 … +80 ℃

Dimensione della porta: G1/8

📌 Scomposizione del codice modello

ADN: Compact cylinder series

20: Foro 20 mm

25: Colpo 25 mm

IO: Internal thread on piston rod

P: Pneumatic cushioning

UN: Integrated magnetic ring

📎 Common Compatible Accessories

Magnetic proximity switch: Serie SME-8 (SME-8-K-LED-24)

Accessori di montaggio: Foot bracket HBN, flange FBN, trunnion SNCU

Piston rod couplings: I-type coupling, Y-type coupling

🔁 Sostituzione & Substitution Information

Sostituzione della stessa serie: Use ADN with identical specification and order number. Old model ADVU is legacy compact cylinder with different construction; mounting dimensions are not directly interchangeable.

Alternativa domestica: Select domestic compact thin cylinder, verify mounting hole pitch, foro, colpo, rod thread and air port position.

📋 Typical Applications

Automated assembly, linee di trasporto, attrezzature per utensili, sorting stations, short-stroke pushing and clamping for 3C equipment.

Troubleshooting Guide for Festa ADN-20-25-I-P-A (552788)

Precaution: Cut off air supply, release pressure and lock the air supply switch before maintenance to prevent unintended movement. This model is designed for lifetime lubrication; additional oiling is not required. Dry filtered non-lubricated compressed air is recommended.

Troubleshooting sequence: Air supply → Solenoid valve & tubing → Flow control → Mechanical alignment → Cylinder body → Magnetic switch

Cylinder does not move at all

Fornitura d'aria: Low pressure (recommended 0.4~0.6 MPa), clogged filter, condensed water in FRL unit, shut-off main valve. Measure pressure at cylinder port and compare with main gauge.

Circuito di controllo: No output from solenoid valve, burnt coil. Test valve via manual override; check for missing PLC signals.

Blocked air circuit: G1/8 port, throttle fully closed, crushed tubing. Disconnect tube and check exhaust flow.

Sequestro meccanico: Jammed load, misaligned guide, binding piston rod. Disconnect load and test cylinder independently with air supply.

Cylinder internal fault: Stuck piston seal, foreign debris inside barrel. Manually push rod; obvious resistance or immobility indicates jam.

Erratic movement, judder, stick-slip

Incorrect throttling: Meter-in throttling easily causes chattering. Meter-out throttling is preferred. Mount one-way flow regulators on exhaust ports and adjust gradually.

Tubing issues: Undersized tubing, long piping leading to large pressure drop. Shorten hoses or increase tube diameter.

Misalignment: Load guide not coaxial with piston rod. Use floating joint to eliminate rigid binding.

Contaminated piston rod: Dust or metal shavings scratch wiper seal. Clean rod; install protective boot for dusty environments.

Unstable supply pressure: Install upstream air reservoir for pressure stabilization.

Insufficient thrust, fails to reach end position

Low supply pressure or large transient pressure drop; add upstream air tank.

Premature hard stop from external limit: Adjust stopper. Avoid piston hard impact against external mechanical stops.

Internal leakage: Worn piston seal causing cross-port leakage. Sintomo: Rod slowly retracts under holding pressure, obvious loss of force.

Over-tight cushion screw: Cushion screw screwed too deep restricts exhaust; fine-adjust cushion screw.

Perdita d'aria (esterno / interno)

Fitting leakage: Uneven tube cut, incomplete insertion, poor thread sealing. Test with soapy water.

Front end external leakage: Worn wiper / rod seal, scratches on piston rod.

End cap leakage: Aged O-rings on front/rear end caps.

Internal leakage diagnosis: Pressurize one chamber; continuous exhaust from the opposite chamber confirms damaged piston seal. If cylinder barrel is scored, repair is not feasible; replace cylinder directly.

Nota: ADN compact barrels are thin-walled. Once scratched, seal replacement will quickly leak again.

Magnetic switch false triggering, no detection or signal loss (magnetic version)

Mismatched switch: SME-8 series is required for ADN magnetic rings.

Posizione di montaggio: Switch outside travel range or loose mounting.

Magnetic interference: Nearby iron blocks, strong magnets or metal brackets. Increase clearance.

Sovratemperatura: Operating range -20~+80℃; out-of-range temperature causes unstable switch behaviour.

Damaged magnetic ring: Cracked or demagnetised piston magnet (raro, usually after heavy impact).

Wiring fault: Low 24V supply, broken wire or short circuit.

Heavy impact, rebound, loud end-of-stroke noise

Improper cushion setting: Excess cushion opening → impact; cushion fully closed → rebound. Adjust both cushion screws slowly for smooth stopping.

Excessive meter-out flow, ad alta velocità. Reduce flow regulator setting first, then fine-tune cushion.

High load inertia exceeding built-in cushion capacity. Add external hydraulic shock absorber.

Preventive Maintenance Checklist
Air quality: Condensate, oil sludge and dust (ADN is sensitive to contaminants).
Piston rod condition: Scratches, rust and dust accumulation.
Coaxial alignment: Recheck alignment after every fixture change.
Magnetic switch mounting and wiring tightness.
Cushion setting: Vibration may loosen cushion screws over time.
Repair Decision Guidance

Only O-rings and rod seal worn, barrel undamaged: Festo original repair kit can be used for seal replacement.

Stelo del pistone graffiato, scored barrel or deformation: Replace cylinder 552788 directly, repair is not recommended.

Do not add lubricating oil arbitrarily; excess oil attracts dust and accelerates seal wear.

Quick Diagnostic Tip

Disconnect load and supply air directly to cylinder:

✅ Smooth operation under no load → Fault source: Misalignment, load or external limit

❌ Still weak, juddering or leaking under no load → Fault source: Cylinder seal, barrel or cushion assembly

Festo ADN is a modular configurable cylinder. Available bores: 12/16/20/25/32/40/50/63/80/100/125 mm; stroke range 5 mm～500 mm. Options include A (filettatura esterna) / IO (internal thread), P/PPS cushion, magnetic ring A, Q anti-rotation, S2 double rod, EL end lock, KP clamping, S1 reinforced rod, S6 high temperature, S11 low friction, R3 corrosion resistance, ecc. Tens of thousands of combinations exist; a complete master list is not available. Below: coding rule + frequently used base models (A-P-A / I-P-A, including your 552788) + order number table + suffix definition.

ADN Model Coding (Metric, ISO21287)

ADN-Bore-Stroke-Rod Thread-Cushion-Magnet-[Opzioni]

ADN: Double-acting compact cylinder

UN: Piston rod external thread; IO: Piston rod internal thread

P: Standard adjustable pneumatic cushion; PPS: Self-adjusting pneumatic cushion

UN: Integrated magnetic ring for SME-8 switches

Q: Square anti-rotation rod; S2: Double-ended piston rod; S20: Hollow double rod

LUI: End position lock; KP: Clamping unit; S1: Reinforced piston rod

S6: High-temperature seal up to 120℃; S11: Basso attrito; R3: Heavy corrosion resistance; TT: Low-temperature seal (-40℃)

Standard Base Model: ADN-xx-xx-A-P-A (External Thread, Magnet, Adjustable Cushion)

Foro	Colpo	Modello	Ordine n.
12	5	ADN-12-5-A-P-A	536200
12	10	ADN-12-10-A-P-A	536204
12	15	ADN-12-15-A-P-A	536206
12	20	ADN-12-20-A-P-A	536208
12	25	ADN-12-25-A-P-A	536210
16	5	ADN-16-5-A-P-A	536220
16	10	ADN-16-10-A-P-A	536224
16	15	ADN-16-15-A-P-A	536226
16	20	ADN-16-20-A-P-A	536228
16	25	ADN-16-25-A-P-A	536230
20	5	ADN-20-5-A-P-A	536240
20	10	ADN-20-10-A-P-A	536244
20	15	ADN-20-15-A-P-A	536246
20	20	ADN-20-20-A-P-A	536248
20	25	ADN-20-25-A-P-A	536250
25	5	ADN-25-5-A-P-A	536260
25	10	ADN-25-10-A-P-A	536264
25	15	ADN-25-15-A-P-A	536266
25	20	ADN-25-20-A-P-A	536268
25	25	ADN-25-25-A-P-A	536270
32	5	ADN-32-5-A-P-A	536280
32	10	ADN-32-10-A-P-A	536284
32	15	ADN-32-15-A-P-A	536286
32	20	ADN-32-20-A-P-A	536288
32	25	ADN-32-25-A-P-A	536290
40	5	ADN-40-5-A-P-A	536300
40	10	ADN-40-10-A-P-A	536304
40	15	ADN-40-15-A-P-A	536306
40	20	ADN-40-20-A-P-A	536308
40	25	ADN-40-25-A-P-A	536310
50	10	ADN-50-10-A-P-A	536324
50	20	ADN-50-20-A-P-A	536328
50	25	ADN-50-25-A-P-A	536330
63	10	ADN-63-10-A-P-A	536344
63	20	ADN-63-20-A-P-A	536348
63	25	ADN-63-25-A-P-A	536350

Standard Base Model: ADN-xx-xx-I-P-A (Internal Thread, same style as 552788)

Foro	Colpo	Modello	Ordine n.
12	5	ADN-12-5-I-P-A	536201
12	10	ADN-12-10-I-P-A	536212
12	15	ADN-12-15-I-P-A	536213
12	20	ADN-12-20-I-P-A	536214
12	25	ADN-12-25-I-P-A	536215
16	5	ADN-16-5-I-P-A	536221
16	10	ADN-16-10-I-P-A	536232
16	15	ADN-16-15-I-P-A	536233
16	20	ADN-16-20-I-P-A	536234
16	25	ADN-16-25-I-P-A	536235
20	5	ADN-20-5-I-P-A	536241
20	10	ADN-20-10-I-P-A	536252
20	15	ADN-20-15-I-P-A	536253
20	20	ADN-20-20-I-P-A	536254
20	25	ADN-20-25-I-P-A	552788
25	5	ADN-25-5-I-P-A	536261
25	10	ADN-25-10-I-P-A	536272
25	15	ADN-25-15-I-P-A	536273
25	20	ADN-25-20-I-P-A	536274
25	25	ADN-25-25-I-P-A	536275
32	5	ADN-32-5-I-P-A	536281
32	10	ADN-32-10-I-P-A	536292
32	15	ADN-32-15-I-P-A	536293
32	20	ADN-32-20-I-P-A	536294
32	25	ADN-32-25-I-P-A	536295
40	5	ADN-40-5-I-P-A	536301
40	10	ADN-40-10-I-P-A	536312
40	15	ADN-40-15-I-P-A	536313
40	20	ADN-40-20-I-P-A	536314
40	25	ADN-40-25-I-P-A	536315
50	10	ADN-50-10-I-P-A	536332
50	20	ADN-50-20-I-P-A	536334
50	25	ADN-50-25-I-P-A	536335
63	10	ADN-63-10-I-P-A	536352
63	20	ADN-63-20-I-P-A	536354
63	25	ADN-63-25-I-P-A	536355

Common Suffix Definitions for Special Versions

Q: Square anti-rotation rod (example: ADN-20-25-Q-P-A)

S2: Double-ended piston rod

S20: Hollow double rod

LUI: End position locking cylinder

KP: Integrated clamping unit

PPS: Self-adjusting pneumatic cushion, replaces standard P cushion

S11: Low-friction version for low-force applications

S6: High-temperature seal, up to 120℃

R3: Heavy-duty corrosion-resistant coating for washdown/humid environments

TT: Low-temperature seal, down to -40℃

Note aggiuntive
Longer stroke variants (30/40/50/80/100…500 mm), bores 80/100/125, inch variants, and special options such as Q/S2/EL/KP are numerous. This table covers frequently used short-stroke base models.
AEN is single-acting variant (not part of ADN series). ADNGF is guided compact cylinder, different product line.
Legacy compact cylinder ADVU has different mounting geometry and cannot be swapped directly.