Airtac SEJ Adjustable Cylinder SEJ63X75-50S
The AirTAC Airtac SEJ Adjustable Cylinder SEJ63X75-50S 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 Ø63mm unit covers an effective stroke of 25–75mm without changing cylinders. Force is equal in both directions.
- BoreØ63 mm
- Nominal stroke75 mm
- Adjust window50 mm
- Effective stroke25–75 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 SEJ63X75-50S
The AirTAC SEJ63X75-50S is a double-acting, double-rod ISO 15552 profile cylinder with an adjustable retract stroke. A rod exits both ends, yielding identical annulus areas so the drive force is 1402 N each way at 0.5 MPa. The 50 mm adjustment window lets you dial the retract end down, giving an effective stroke range of 25 to 75 mm.
A stop screw on the back rod mechanically sets the end position for precise machine commissioning. The integrated -S magnet supports CMSE reed and DMSE electronic sensors for position feedback. Adjustable air cushions at both ends decelerate the load near stroke end, but do not lock the rod pneumatically.
Airtac SEJ Adjustable Cylinder SEJ63X75-50S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ63X75-50S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 75 mm |
| Adjustment window | 50 mm (25–75 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 50mm 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 SEJ63X75-50S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 63 | 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 SEJ63X75-50S Is Used
Press Tool Changeover
Dial in the 25 to 75 mm stroke range to hit varying material thicknesses during press tooling changeovers, utilizing the 1402 N both-way force.
Variable Stop Gate
Adjust the retract end position on the fly to index different package sizes on a conveyor line without swapping out the cylinder hardware.
Test Fixture Positioning
Fine-tune the exact end stop during laboratory test fixture commissioning, locking the back-rod screw once the optimal 63 mm bore position is found.
Is the Airtac SEJ Adjustable Cylinder SEJ63X75-50S the Right Cylinder?
Verify the 50 mm adjustment window covers your required end-position tuning. Stepping down to a 50 mm bore drops the both-way force to 825 N at 0.5 MPa, while moving up to an 80 mm bore increases it to 2268 N. If your application requires fail-safe position holding on air loss, use a BSED or an external rod lock instead of relying on the cushion. For direct ISO 15552 replacement, match the 75 mm nominal stroke, PT3/8 port, and mounting subset (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SEJ63X75-50S FAQ
The 50 mm stop-screw window lets you dial the retract stroke down from the 75 mm nominal, yielding an effective stroke range of 25 to 75 mm.
Because it is a double-rod design, the force is equal 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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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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