Airtac SEJ Adjustable Cylinder SEJ80AX75-30S
The AirTAC SEJ Adjustable Cylinder SEJ80AX75-30S is a genuine double-acting ISO 15552 double-rod cylinder with a mechanically ADJUSTABLE stroke: a back-rod stop screw lets you fine-tune the retract end over a 30mm window, so this Ø80mm unit covers an effective stroke of 45–75mm without changing cylinders. Force is equal in both directions.
- BoreØ80 mm
- Nominal stroke75 mm
- Adjust window30 mm
- Effective stroke45–75 mm
- Port sizePT3/8
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SEJ Adjustable Cylinder SEJ80AX75-30S
The AirTAC SEJ80AX75-30S is a double-acting, double-rod profile cylinder built to ISO 15552 dimensional standards. A rod exits both ends, yielding identical annulus areas so output force is equal in both directions at 2268 N each way at 0.5 MPa. The retract stroke is mechanically adjustable via a back-rod stop screw over a 30 mm window, giving an effective stroke range of 45 to 75 mm. You lock the screw after setting the exact end position.
This unit features a SUS420J2 stainless steel rod for corrosion and washdown duty. It includes a magnet for position sensing and uses field-adjustable air cushions at both ends to decelerate the 25 mm rod near stroke ends. The extruded aluminum barrel has no external tie rods, and the PT3/8 ports match the 80 mm bore standard.
Airtac SEJ Adjustable Cylinder SEJ80AX75-30S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ80AX75-30S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 75 mm |
| Adjustment window | 30 mm (45–75 mm) |
| Configuration | Double rod, double acting |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C (0–150 °C with FKM seals) |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
Specifications follow the official AirTAC SEJ datasheet and ISO 15552 / VDMA 24562 dimensions. The adjustment screw shortens the retract end only; do not exceed the 30mm window. Port options: PT (standard) / G (BSPP).
Theoretical Output Force (Ø80mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 2268 N |
| 0.7 MPa | 3175 N |
| Max (@1.0 MPa) | 463 kgf |
A rod exits both ends, so extend and retract force are identical. Actual usable force is lower than theoretical; size with a safety margin.
Model Code: Airtac SEJ Adjustable Cylinder SEJ80AX75-30S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 80 | Bore size in mm. |
| ×75 | Nominal stroke length in mm. |
| -30 | Adjustment stroke window in mm (options: 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B). Seals: TPU (blank) / FKM high-temp (H) / NBR (N). Thread: PT (blank) / G. Mounting (SEJ): Basic, LB, FA, TC, FTC, TCM1, TCM2. Related: SED (double rod, fixed stroke), SE (single rod).
Where the Airtac SEJ Adjustable Cylinder SEJ80AX75-30S Is Used
Filler Nozzle Height Calibration
Dial the 30 mm retract window to match varying bottle heights on a packaging line, using the 2268 N both-way force to precisely lift and lower filling nozzles.
Washdown Clamping Station
Securely hold parts in a food-grade washdown environment using the SUS420J2 stainless rod, fine-tuning the clamp position on the machine during commissioning.
Is the Airtac SEJ Adjustable Cylinder SEJ80AX75-30S the Right Cylinder?
Verify the 30 mm adjustment window covers your required end-position range. If you need less force, the 63 mm neighbor provides 1402 N at 0.5 MPa both ways; if you need more, the 100 mm bore provides 3681 N at 0.5 MPa. For fixed-position tasks without end-tuning, a standard SED double-rod cylinder is sufficient. The adjustable air cushion decelerates the load near stroke end but does not hold position on air loss; for fail-safe holding, specify a BSED or an external rod lock. Since this is a short 75 mm stroke, side-load stress is minimal, but external guides are always recommended for heavy lateral loads. Ensure your ISO 15552 replacement matches the 80 mm bore, 45-75 mm stroke, PT3/8 port, and mounting style.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (30mm) covers your range
- ✓ Equal force both directions OK
- ✓ Port/thread type (PT/G)
- ✓ Magnet (-S) for CMSE/DMSE sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the stop screw within the 30mm window; lock it after adjusting.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (LB/FA/TC/FTC/TCM1/TCM2).
- check Installation by qualified personnel per AirTAC docs.
Airtac SEJ Adjustable Cylinder SEJ80AX75-30S FAQ
A stop screw on the rear rod mechanically shortens the retract stroke over a 30 mm window. For this 75 mm nominal stroke model, the effective retract stroke can be dialed down to 45 mm. You lock the screw after finding the exact end position.
Because it is a double-rod cylinder, force is equal both ways: 2268 N at 0.5 MPa, 3175 N at 0.7 MPa, and a maximum of 463 kgf at 1.0 MPa.
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