Airtac SEJ Adjustable Cylinder SEJ32X80-50SFA
The AirTAC Airtac SEJ Adjustable Cylinder SEJ32X80-50SFA 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 50mm window, so this Ø32mm unit covers an effective stroke of 30–80mm without changing cylinders. Force is equal in both directions.
- BoreØ32 mm
- Nominal stroke80 mm
- Adjust window50 mm
- Effective stroke30–80 mm
- Port sizePT1/8
- CushionAdjustable, 27 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 SEJ32X80-50SFA
The AirTAC SEJ32X80-50SFA is a double-acting, double-rod ISO 15552 profile cylinder with a 50mm adjustable stroke window, yielding an effective stroke range of 30-80mm. A rod exits both ends, ensuring the annular area remains identical in both directions. This equal-force design delivers 345 N each way at 0.5 MPa and 483 N at 0.7 MPa.
You dial in the retract end-position via a stop screw on the back rod, then lock it after setting. Because it carries an FA mounting accessory and an S magnet, it integrates seamlessly with CMSE reed or DMSE electronic sensors. The extruded aluminum barrel omits external tie rods, and adjustable air cushions at both ends decelerate the 12mm rod near stroke extremes.
Airtac SEJ Adjustable Cylinder SEJ32X80-50SFA Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ32X80-50SFA |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 80 mm |
| Adjustment window | 50 mm (30–80 mm) |
| Configuration | Double rod, double acting |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
|---|---|
| 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, 27 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 50mm window. Port options: PT (standard) / G (BSPP).
Theoretical Output Force (Ø32mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 346 N |
| 0.7 MPa | 484 N |
| Max (@1.0 MPa) | 70 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 SEJ32X80-50SFA
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 32 | Bore size in mm. |
| ×80 | Nominal stroke length in mm. |
| -50 | 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 SEJ32X80-50SFA Is Used
Packaging Flap Folding
Dial the 50mm retract window to fine-tune carton flap folding positions on the fly, using the equal 345N both-way force to push and pull the flap mechanism securely.
Product Changeover Stops
Adjust the mechanical stop over the 30-80mm range to accommodate different product heights on a conveyor line without swapping out physical hard stops.
Small-Part Pressing
Set precise end positions for pressing small electronic components, leveraging the 483N both-way force and adjustable air cushions to prevent impact damage.
Is the Airtac SEJ Adjustable Cylinder SEJ32X80-50SFA the Right Cylinder?
Verify this 50mm window covers your required end-position variance. If you need less fine-tuning range, a fixed-stroke SED might suffice. For sizing, the adjacent bore down is 32mm (this unit) and the next bore up is 40mm, which provides 528 N both ways at 0.5 MPa—useful if your load exceeds the 345 N output here. When replacing an ISO 15552 cylinder, match the 32mm bore, 80mm nominal stroke, PT1/8 port, FA mount, and magnet. Note that the air cushion and stop screw only decelerate the load and set the mechanical end; a plain SEJ does not hold position on air loss. For fail-safe holding, point to a BSED or an external rod lock.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (50mm) 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 50mm 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 SEJ32X80-50SFA FAQ
The 50mm adjustment window lets you dial the retract stroke from 30mm up to the nominal 80mm. You set the exact end position via a stop screw on the back rod, then lock it in place.
Because the rod exits both ends, force is equal in both directions. It outputs 345 N at 0.5 MPa, 483 N at 0.7 MPa, and reaches a maximum of 70 kgf at 1.0 MPa.
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