Airtac SEJ Adjustable Cylinder SEJ63X80-30
The AirTAC Airtac SEJ Adjustable Cylinder SEJ63X80-30 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 30mm window, so this Ø63mm unit covers an effective stroke of 50–80mm without changing cylinders. Force is equal in both directions.
- BoreØ63 mm
- Nominal stroke80 mm
- Adjust window30 mm
- Effective stroke50–80 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 SEJ63X80-30
The AirTAC SEJ63X80-30 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 30 mm adjustable stroke window. A rod exits both ends, meaning the annular area is identical in both directions. This yields an equal drive force of 1402 N each way at 0.5 MPa, avoiding the thrust asymmetry found in single-rod units.
You can dial the retract end-position up to 30 mm via a stop screw on the back rod, giving an effective stroke range of 50 to 80 mm. The barrel uses an extruded aluminum ISO 15552 profile with no external tie rods, and the field-adjustable air cushions at both ends decelerate the load near stroke end. This base SKU lacks a magnet, so it will not trigger CMSE or DMSE position sensors.
Airtac SEJ Adjustable Cylinder SEJ63X80-30 Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ63X80-30 |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 80 mm |
| Adjustment window | 30 mm (50–80 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 30mm 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 SEJ63X80-30
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 63 | Bore size in mm. |
| ×80 | Nominal stroke length in mm. |
| -30 | 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 SEJ63X80-30 Is Used
Press Die Trial
Dial in the exact 50-80 mm clamp stroke on a stamping press during die tryout, leveraging the 1962 N both-way force at 0.7 MPa to seat the blank securely.
Variable Stop Assembly
Adjust the retract stop on an automated assembly line to handle different part heights without swapping hardware, using the equal both-way thrust for stable pressing.
Flight Divider Setup
Fine-tune the 80 mm stroke on a conveyor diverter during commissioning to match the exact package width, locking the back-rod screw once the optimal position is found.
Is the Airtac SEJ Adjustable Cylinder SEJ63X80-30 the Right Cylinder?
This 63 mm bore provides 1402 N of both-way force at 0.5 MPa. If your load is lighter, step down to the 50 mm bore for 825 N; if heavier, step up to the 80 mm bore for 2268 N. The 30 mm adjustment window is ideal for dialing in a precise 50 to 80 mm end-stop during commissioning. If your end-position never changes, a fixed-stroke SED saves complexity. For drop-in ISO 15552 replacement, match the 80 mm stroke, 30 mm window, PT3/8 port, and mounting choice (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Note: the stop screw and air cushions only set the mechanical end and decelerate the load; they do not hold position on air loss. For fail-safe holding, use an external rod lock or BSED.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (30mm) 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 30mm 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 SEJ63X80-30 FAQ
A stop screw on the back rod lets you mechanically shorten the retract stroke by up to 30 mm. This gives an effective stroke range of 50 to 80 mm, which you set and lock during commissioning.
Because it is a double-rod cylinder, force is equal 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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