Airtac SEJ Adjustable Cylinder SEJ100X75-40S
The AirTAC Airtac SEJ Adjustable Cylinder SEJ100X75-40S 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 40mm window, so this Ø100mm unit covers an effective stroke of 35–75mm without changing cylinders. Force is equal in both directions.
- BoreØ100 mm
- Nominal stroke75 mm
- Adjust window40 mm
- Effective stroke35–75 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 SEJ100X75-40S
The AirTAC SEJ100X75-40S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm adjustable stroke window. A rod exits both ends, yielding equal force in both directions at 3681 N each way at 0.5 MPa. The retract stroke dials down from 75mm to a 35mm minimum via a stop screw on the back rod, letting you set the exact end position on the machine without swapping hardware.
This extruded aluminum profile cylinder includes a magnet for CMSE or DMSE sensors. It features field-adjustable air cushions at both ends and a PT1/2 port. The equal annular area prevents speed disparities between extend and retract, while the dual rods enhance guiding stability against side loads.
Airtac SEJ Adjustable Cylinder SEJ100X75-40S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ100X75-40S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 75 mm |
| Adjustment window | 40 mm (35–75 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 40mm 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 SEJ100X75-40S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 100 | Bore size in mm. |
| ×75 | Nominal stroke length in mm. |
| -40 | 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 SEJ100X75-40S Is Used
Press Die Trial
Dial in the 35-75mm stroke during stamping press setup, using the 5153 N both-way force to seat trial dies precisely before locking the back rod.
Bending Stop
Adjust the retract stop on a tube bender to hit exact angles across different material batches, leveraging the equal push and pull force for consistent forming.
Packaging Changeover
Fine-tune the end position for varying carton heights on a packaging line, shifting the 40mm window to match new formats without changing mounting hardware.
Is the Airtac SEJ Adjustable Cylinder SEJ100X75-40S the Right Cylinder?
Verify the 40mm adjustment window covers your required end-position range. If 3681 N at 0.5 MPa is excessive, step down to the 80mm bore offering 2268 N both ways; if insufficient, the 125mm bore provides 5734 N. If your application never requires stroke changes, a fixed-stroke SED is sufficient. For fail-safe position holding on air loss, add an external rod lock, as the cushion and stop screw only set the mechanical end and decelerate near stroke end, not a lock. As an ISO 15552 cylinder, match the 100mm bore, 75mm stroke, PT1/2 port, and magnet for direct dimensional replacement.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (40mm) 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 40mm 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 SEJ100X75-40S FAQ
A stop screw on the rear rod lets you dial the retract stroke down by up to 40mm. The effective stroke range is 35-75mm, which you set during commissioning and lock in place.
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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