Airtac SEJ Adjustable Cylinder SEJ100X75-75S
The AirTAC Airtac SEJ Adjustable Cylinder SEJ100X75-75S 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 Ø100mm unit covers an effective stroke of 0–75mm without changing cylinders. Force is equal in both directions.
- BoreØ100 mm
- Nominal stroke75 mm
- Adjust window75 mm
- Effective stroke0–75 mm
- Port sizePT1/2
- 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 SEJ100X75-75S
The AirTAC SEJ100X75-75S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 75mm adjustable stroke window. A rod exits both ends, yielding identical annulus areas so output force is equal in both directions. You get 3681 N each way at 0.5 MPa, and 5153 N at 0.7 MPa.
By turning the mechanical stop screw on the back rod, you can dial the retract end-position down from the 75mm nominal stroke to zero, covering an effective stroke range of 0-75mm. The extruded aluminum barrel has no external tie rods, and the included -S magnet enables precise position detection with CMSE reed or DMSE electronic sensors.
Airtac SEJ Adjustable Cylinder SEJ100X75-75S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ100X75-75S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 75 mm |
| Adjustment window | 75 mm (0–75 mm) |
| Configuration | Double rod, double acting |
| Port size | PT1/2 |
| 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 (Ø100mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 3682 N |
| 0.7 MPa | 5154 N |
| Max (@1.0 MPa) | 751 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 SEJ100X75-75S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 100 | Bore size in mm. |
| ×75 | 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 SEJ100X75-75S Is Used
Press Die Height Changeover
Dial the 75mm stop screw to match varying material thicknesses in a stamping press, utilizing the 5153 N both-way force to clamp workpieces securely.
Variable-Length Stopper Arms
Adjust the retract position on the fly for different pallet sizes on a conveyor line, using the double-rod design to prevent rod rotation.
Machine Commissioning Tuning
Fine-tune the exact end-of-stroke position during setup without swapping hardware, locking the back-rod stop screw once the 3681 N positioning target is met.
Is the Airtac SEJ Adjustable Cylinder SEJ100X75-75S the Right Cylinder?
Confirm this 75mm adjustment window covers your machine's required end-position range. If you need less force, stepping down to the 80mm bore yields 2268 N at 0.5 MPa both ways. If you need more power, the 125mm bore provides 5734 N. If your application never requires position changes after commissioning, a fixed-stroke SED cylinder is sufficient.
Remember that a plain SEJ100X75-75S does not hold position on air loss; the adjustable air cushion and stop screw only set the mechanical end and decelerate the load. For fail-safe holding, use an external rod lock. When replacing an ISO 15552 cylinder, match the 100mm bore, 0-75mm window, PT1/2 port, and mounting style (Basic, FA, LB, TC, FTC, TCM1, or TCM2).
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 SEJ100X75-75S FAQ
A stop screw on the rear rod mechanically shortens the retract stroke over a 75mm window. The effective stroke range is 0-75mm. You dial the exact end-position during machine commissioning and lock the screw in place.
Because it is a double-rod cylinder, force is equal both ways: 3681 N at 0.5 MPa, 5153 N at 0.7 MPa, and a maximum of 751 kgf at 1.0 MPa.
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