Airtac SEJ Adjustable Cylinder SEJ100X75-50
The AirTAC Airtac SEJ Adjustable Cylinder SEJ100X75-50 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 Ø100mm unit covers an effective stroke of 25–75mm without changing cylinders. Force is equal in both directions.
- BoreØ100 mm
- Nominal stroke75 mm
- Adjust window50 mm
- Effective stroke25–75 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 SEJ100X75-50
The AirTAC SEJ100X75-50 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 50mm adjustable stroke window. A rod exits both ends, yielding identical annular areas so thrust is equal in both directions at 3681 N each way at 0.5 MPa. You can dial the retract end from 25mm up to the nominal 75mm via a back-rod stop screw, locking it precisely after setting.
This extruded aluminum barrel unit carries a PT1/2 port, a Ø25mm rod with an M20x1.5 thread, and field-adjustable air cushions at both ends for end-of-stroke deceleration. It operates at 30-800 mm/s and 0.15-1.0 MPa. This specific SKU ships without a magnet, so it has no built-in position sensing.
Airtac SEJ Adjustable Cylinder SEJ100X75-50 Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ100X75-50 |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 75 mm |
| Adjustment window | 50 mm (25–75 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 50mm 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 SEJ100X75-50
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 100 | Bore size in mm. |
| ×75 | 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 SEJ100X75-50 Is Used
Press Die Height Changeover
Dial the 50mm retract window to match varying die heights during press changeovers, delivering a stable 5153 N clamping force at 0.7 MPa in both directions.
Variable-Stop Metal Forming
Fine-tune the forming depth on a hydraulic press auxiliary cylinder from 25 to 75mm without swapping hardware, using the 3681 N both-way thrust to push and pull the slide.
Packaging Machine Trial Positioning
Commission a carton folding station by adjusting the end stop precisely to the flap width, locking the back-rod screw once the 751 kgf max mechanical stop is verified.
Is the Airtac SEJ Adjustable Cylinder SEJ100X75-50 the Right Cylinder?
Confirm the 50mm adjustment window covers your required end-position variance (effective range 25-75mm). If your application needs less fine-tuning, a fixed-stroke SED100X75 is sufficient. For sizing, stepping down to a 63mm bore yields 1402 N both ways at 0.5 MPa, while stepping up to a 125mm bore provides 5734 N both ways. Use this 100mm bore for loads requiring roughly 3.6 kN of thrust.
Dimensionally interchangeable per ISO 15552, match your replacement by verifying the 75mm stroke, 50mm window, PT1/2 port, and mounting choice (Basic, FA, LB, TC, FTC, TCM1, or TCM2). The adjustable air cushion decelerates the load near stroke end but is not a lock; a plain SEJ does not hold position on air loss, so for fail-safe holding point to a BSED or an external rod lock. At 75mm stroke, side loads are minimal, but for any stroke >=300mm add external guide rails to protect the rod.
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 SEJ100X75-50 FAQ
The 50mm adjustment window lets you mechanically dial the retract end position anywhere in an effective range of 25mm to 75mm via a stop screw on the back rod, which you lock after setting.
Because the rod exits both ends, force is equal in both directions: 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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