Airtac SEJ Adjustable Cylinder SEJ63BX450-100SFA
The AirTAC SEJ Adjustable Cylinder SEJ63BX450-100SFA 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 350–450mm without changing cylinders. Force is equal in both directions.
- BoreØ63 mm
- Nominal stroke450 mm
- Adjust window100 mm
- Effective stroke350–450 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 SEJ63BX450-100SFA
The AirTAC SEJ63BX450-100SFA is a double-acting, double-rod ISO 15552 profile cylinder featuring a 100mm adjustable stroke window. A rod exits both ends, yielding identical annulus areas so thrust is equal in both directions at 1402 N each way at 0.5 MPa. The SUS304 stainless steel rods suit corrosion-sensitive or washdown environments.
By turning the mechanical stop screw on the back rod, you shorten the retract stroke over a fixed 100mm window, giving an effective travel of 350-450mm. This allows precise on-machine end-position tuning without hardware changes. The extruded aluminum barrel has no external tie rods, and the FA front-flange mounting accessory provides a rigid front-face anchor.
Airtac SEJ Adjustable Cylinder SEJ63BX450-100SFA Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ63BX450-100SFA |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 450 mm |
| Adjustment window | 100 mm (350–450 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 SEJ63BX450-100SFA
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 63 | Bore size in mm. |
| ×450 | 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 SEJ63BX450-100SFA Is Used
Packaging Changeover
Dial the 100mm retract window to adapt a packaging line for varying carton heights, using the 1402 N both-way force at 0.5 MPa to push folding mechanisms.
Press Fit Tuning
Fine-tune the insertion depth of bearings on an assembly press across the 350-450mm effective range, relying on the equal double-rod thrust for consistent retraction.
Variable Stop Positioning
Adjust the mechanical stop screw on a conveyor diverter to handle mixed product lengths without swapping the cylinder, leveraging the 30-800 mm/s speed range.
Is the Airtac SEJ Adjustable Cylinder SEJ63BX450-100SFA the Right Cylinder?
Confirm the 100mm adjustment window covers your positioning range. If you need less force, the adjacent 50mm bore yields 825 N both ways at 0.5 MPa; if scaling up, the 80mm bore provides 2268 N. For fixed-stroke tasks without on-machine dialing, the SED double-rod cylinder is sufficient. Remember, the adjustable air cushion decelerates the load near stroke ends but does not hold position on air loss; for fail-safe holding, use an external rod lock.
At 450mm stroke, the extended rod is prone to side-load bending; ensure external guide rails carry the load. This ISO 15552 cylinder replaces hardware by matching the 63mm bore, 450mm stroke, PT3/8 port, FA mount, and -S magnet for CMSE or DMSE sensors.
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 SEJ63BX450-100SFA FAQ
A stop screw on the back rod mechanically shortens the retract stroke over a 100mm window. You can dial the effective stroke from 350mm up to 450mm, then lock the screw to set the exact end position.
Because it is a double-rod cylinder, the 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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