Airtac SEJ Adjustable Cylinder SEJ80BX100-75S
The AirTAC SEJ Adjustable Cylinder SEJ80BX100-75S 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 75mm window, so this Ø80mm unit covers an effective stroke of 25–100mm without changing cylinders. Force is equal in both directions.
- BoreØ80 mm
- Nominal stroke100 mm
- Adjust window75 mm
- Effective stroke25–100 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 SEJ80BX100-75S
The AirTAC SEJ80BX100-75S is a double-acting, double-rod ISO 15552 profile cylinder featuring a SUS304 stainless steel rod for corrosion resistance. A rod exits both ends, ensuring the output force is perfectly balanced at 2268 N each way at 0.5 MPa. The retract stroke is mechanically adjustable via a back-rod stop screw over a 75 mm window, giving an effective stroke range of 25 to 100 mm.
This cylinder includes a magnet for CMSE reed or DMSE electronic sensors. It uses PT3/8 ports, a Ø25 mm rod with an M20x1.5 thread, and field-adjustable air cushions at both ends to decelerate loads near the stroke extremes. The extruded aluminum barrel contains no external tie rods, maintaining strict ISO 15552 dimensional interchangeability.
Airtac SEJ Adjustable Cylinder SEJ80BX100-75S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ80BX100-75S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 100 mm |
| Adjustment window | 75 mm (25–100 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 75mm 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 SEJ80BX100-75S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 80 | Bore size in mm. |
| ×100 | Nominal stroke length in mm. |
| -75 | 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 SEJ80BX100-75S Is Used
Palletizer Stop Dial
Dial in the 25-100 mm retract stop to match varying pallet heights during commissioning, using the 3175 N both-way force to halt heavy cardboard loads precisely.
Bending Press Back-Gauge
Fine-tune the metal sheet end-stop on the fly. The SUS304 rod withstands coolant washdown, while the equal both-way force ensures consistent retraction.
Packaging Changeover
Adjust the retract position over the 75 mm window to accommodate different carton sizes on a packaging line without swapping out cylinder hardware.
Is the Airtac SEJ Adjustable Cylinder SEJ80BX100-75S the Right Cylinder?
Confirm the 75 mm adjustment window covers your required end-positioning range before ordering. If you need less fine-tune travel, a fixed-stroke SED cylinder is simpler. For sizing, stepping down to a 63 mm bore yields 1402 N at 0.5 MPa both ways, while stepping up to a 100 mm bore provides 3681 N at 0.5 MPa both ways. The standard 100 mm stroke keeps side-load risks low, but always use external guides for heavy lateral loads.
The adjustable air cushion and mechanical stop screw decelerate the load and set the end position, but a plain SEJ does not hold position on air loss. For fail-safe load holding, consider a BSED or an external rod lock. Ensure your ISO 15552 replacement matches the 80 mm bore, 100 mm nominal stroke, 75 mm window, PT3/8 port, and magnet option.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (75mm) 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 75mm 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 SEJ80BX100-75S FAQ
The retract end is adjustable over a 75 mm window via a back-rod stop screw. You can dial the effective stroke from 25 mm up to the nominal 100 mm to fine-tune the machine end position. Lock the screw after setting.
Because a rod exits both ends, the force is identical in both directions: 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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