Airtac SEJ Adjustable Cylinder SEJ63AX800-100S
The AirTAC SEJ Adjustable Cylinder SEJ63AX800-100S 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 100mm window, so this Ø63mm unit covers an effective stroke of 700–800mm without changing cylinders. Force is equal in both directions.
- BoreØ63 mm
- Nominal stroke800 mm
- Adjust window100 mm
- Effective stroke700–800 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 SEJ63AX800-100S
The AirTAC SEJ63AX800-100S is a double-acting, double-rod ISO 15552 profile cylinder engineered for precise end-position tuning. A rod exits both ends, yielding identical annulus areas and equal output force of 1402 N each way at 0.5 MPa. The retract stroke is mechanically adjustable via a back-rod stop screw over a 100 mm window, providing an effective stroke range of 700 to 800 mm without changing hardware.
This unit features a SUS420J2 stainless steel rod for corrosion resistance and includes a magnet for CMSE or DMSE sensors. Adjustable air cushions at both ends decelerate the load near stroke end. Because the 800 mm stroke is long, external guides are recommended to manage side loads and prevent rod binding.
Airtac SEJ Adjustable Cylinder SEJ63AX800-100S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ63AX800-100S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 800 mm |
| Adjustment window | 100 mm (700–800 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 100mm 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 SEJ63AX800-100S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 63 | Bore size in mm. |
| ×800 | Nominal stroke length in mm. |
| -100 | 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 SEJ63AX800-100S Is Used
Automated Welding Line
Dial the 100 mm retract window to position welding heads precisely across varied automotive chassis lengths, utilizing the 1402 N both-way force to move heavy fixtures.
Pallet Diverting Gate
Fine-tune the 700-800 mm stroke during commissioning to align a diverting gate exactly with pallet stop positions without machining new mounts.
Washdown Part Ejection
Leverage the SUS420J2 stainless steel rod to eject packaged food products at equal speeds in both directions, adjusting the end point to match varying box sizes.
Is the Airtac SEJ Adjustable Cylinder SEJ63AX800-100S the Right Cylinder?
Verify the 100 mm adjustment window covers your machine's fine-tuning range, letting you dial the retract end from 700 to 800 mm. If your process requires less force, the 50 mm bore offers 825 N both ways at 0.5 MPa; if you need more power, step up to the 80 mm bore which provides 2268 N both ways at 0.5 MPa. A fixed-stroke SED cylinder is sufficient if you do not need on-machine stroke variability.
For a direct ISO 15552 replacement, match the 63 mm bore, 800 mm stroke, PT3/8 port, and mounting style (Basic, FA, LB, TC, FTC, TCM1, or TCM2). This plain cylinder does not hold position on air loss; the air cushion and stop screw only set the mechanical end and decelerate the load, so point to a BSED or external rod lock for fail-safe holding.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (100mm) 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 100mm 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 SEJ63AX800-100S FAQ
The retract end is mechanically adjustable via a stop screw on the back rod over a 100 mm window. This allows you to set the effective stroke anywhere from 700 mm up to the nominal 800 mm, which is ideal for fine-tuning end positions on the machine.
Because a rod exits both ends, the annulus area is identical in both directions, providing equal force extend and retract. The output is 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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