Airtac SEJ Adjustable Cylinder SEJ63X80-75
The AirTAC Airtac SEJ Adjustable Cylinder SEJ63X80-75 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 75mm window, so this Ø63mm unit covers an effective stroke of 5–80mm without changing cylinders. Force is equal in both directions.
- BoreØ63 mm
- Nominal stroke80 mm
- Adjust window75 mm
- Effective stroke5–80 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 SEJ63X80-75
The AirTAC SEJ63X80-75 is a double-acting, double-rod ISO 15552 profile cylinder with an adjustable retract stroke. A stop screw on the back rod lets you dial the retract end over a 75 mm window, giving an effective stroke range of 5 to 80 mm. Because a rod exits both ends, the annular area is identical in both directions, yielding equal force and speed for extend and retract.
This 63 mm bore unit generates 1402 N each way at 0.5 MPa and 1962 N at 0.7 MPa. It features an extruded aluminum barrel with no external tie rods, field-adjustable air cushions at both ends to manage deceleration, and a PT3/8 port. As this SKU lacks the -S magnet option, it does not support CMSE or DMSE position sensors.
Airtac SEJ Adjustable Cylinder SEJ63X80-75 Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ63X80-75 |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 80 mm |
| Adjustment window | 75 mm (5–80 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 75mm 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 SEJ63X80-75
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 63 | Bore size in mm. |
| ×80 | Nominal stroke length in mm. |
| -75 | 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 SEJ63X80-75 Is Used
Packaging Flap Folding
Dial in the exact 5-80 mm fold depth on carton erectors using the back-rod stop screw, leveraging the 1962 N both-way force to cleanly crease varying board thicknesses.
Bottling Line Changeover
Swiftly adjust the retract end to accommodate different bottle heights during format changeovers, relying on the equal push/pull thrust to handle guide rail repositioning.
Press Fit Trial Positioning
Safely test and set the exact insertion depth for bearing presses across a 75 mm window, using the mechanical stop to lock the final end position after commissioning.
Is the Airtac SEJ Adjustable Cylinder SEJ63X80-75 the Right Cylinder?
This 75 mm adjustment window is highly versatile, letting you fine-tune or changeover end positions on the machine without swapping hardware. If your process requires less force, the adjacent 50 mm bore provides 825 N at 0.5 MPa; if you need more, the 80 mm bore steps up to 2268 N. If the exact end position is permanently fixed and never changes, a standard SED double-rod cylinder is sufficient. For drop-in ISO 15552 replacement, verify the 5-80 mm range, PT3/8 port, and mounting choice (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Note that the adjustable cushion only decelerates the load near stroke end; a plain SEJ does not hold position on air loss, so for fail-safe holding you need a BSED or external rod lock.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (75mm) 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 75mm 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 SEJ63X80-75 FAQ
The retract stroke can be mechanically adjusted using the back-rod stop screw over a 75 mm window. This gives an effective stroke range of 5 mm up to the nominal 80 mm, which is ideal for fine-tuning end positions on the machine without changing hardware.
Because the double-rod design creates equal annular areas, 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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