Airtac SEJ Adjustable Cylinder SEJ63X75-20SFTC
The AirTAC Airtac SEJ Adjustable Cylinder SEJ63X75-20SFTC 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 20mm window, so this Ø63mm unit covers an effective stroke of 55–75mm without changing cylinders. Force is equal in both directions.
- BoreØ63 mm
- Nominal stroke75 mm
- Adjust window20 mm
- Effective stroke55–75 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 SEJ63X75-20SFTC
The AirTAC SEJ63X75-20SFTC is a double-acting, double-rod ISO 15552 profile cylinder with a 20 mm adjustable retract window, yielding an effective stroke range of 55 to 75 mm. A rod exits both ends, generating identical extend and retract forces of 1402 N each way at 0.5 MPa. This symmetric output is ideal for applications requiring consistent dynamics in both travel directions.
Equipped with an FTC center trunnion mount, PT3/8 ports, and a 20 mm diameter rod with an M16x1.5 thread, it handles precise mid-stroke pivoting. The integrated -S magnet supports CMSE reed and DMSE electronic sensors for exact position feedback. Field-adjustable air cushions at both ends absorb kinetic energy near the stroke limits, protecting your machinery.
Airtac SEJ Adjustable Cylinder SEJ63X75-20SFTC Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ63X75-20SFTC |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 75 mm |
| Adjustment window | 20 mm (55–75 mm) |
| Configuration | Double rod, double acting |
| Port size | PT3/8 |
| Rod thread | M16×1.5 |
|---|---|
| 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 20mm window. Port options: PT (standard) / G (BSPP).
Theoretical Output Force (Ø63mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 1402 N |
| 0.7 MPa | 1962 N |
| Max (@1.0 MPa) | 286 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 SEJ63X75-20SFTC
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 63 | Bore size in mm. |
| ×75 | Nominal stroke length in mm. |
| -20 | 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 SEJ63X75-20SFTC Is Used
Diverter Gate Tuning
Dial in the 55 to 75 mm retract stroke to set a conveyor diverter gate angle precisely during commissioning, utilizing the 1402 N both-way force to move heavy cardboard cartons.
Packaging Changeover
Quickly adjust the end position within the 20 mm window to accommodate different package heights on a filling line without swapping hardware, relying on the 1962 N output at 0.7 MPa.
Press Pin Insertion
Use the FTC trunnion mount for pivoting alignment while pressing pins, fine-tuning the insertion depth mechanically via the back-rod stop screw for consistent assembly results.
Is the Airtac SEJ Adjustable Cylinder SEJ63X75-20SFTC the Right Cylinder?
Verify the 20 mm adjustment window covers your end-position tolerance needs. If you need less force, the adjacent 50 mm bore delivers 825 N both ways at 0.5 MPa; if you need more, the 80 mm bore provides 2268 N. If your positioning never changes after commissioning, a fixed-stroke SED cylinder is sufficient. For external guidance, the 20 mm rod resists side loads, but external guides are recommended for heavy off-center loads. Remember, the adjustable cushion and stop screw decelerate the piston; they do not lock position on air loss, so use an external rod lock for fail-safe holding. This ISO 15552 cylinder is dimensionally interchangeable by bore, stroke, and port size.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (20mm) 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 20mm 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 SEJ63X75-20SFTC FAQ
A mechanical stop screw on the rear rod lets you dial the retract end position within a 20 mm window. The effective stroke range is 55 to 75 mm. You set the exact end position during machine commissioning and lock the screw in place.
Because it is a double-rod cylinder, the force is identical in both directions: 1402 N at 0.5 MPa, 1962 N at 0.7 MPa, and a maximum of 286 kgf at 1.0 MPa.
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